Relevant bibliographies by topics / Deep coal gas

Academic literature on the topic 'Deep coal gas'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Deep coal gas"

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Yang, Li, Xin Fang, Xue Wang, Shanshan Li, and Junqi Zhu. "Risk Prediction of Coal and Gas Outburst in Deep Coal Mines Based on the SAPSO-ELM Algorithm." International Journal of Environmental Research and Public Health 19, no. 19 (September 28, 2022): 12382. http://dx.doi.org/10.3390/ijerph191912382.

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Effective risk prevention and management in deep coal mines can reduce the occurrences of outburst accidents and casualties. To address the low accuracy and inefficiency of coal–gas outburst prediction in deep coal mines, this study proposes a deep coal–gas outburst risk prediction method based on kernal principal component analysis (KPCA) and an improved extreme learning machine (SAPSO-ELM) algorithm. Firstly, high-dimensional nonlinear raw data were processed by KPCA. Secondly, the extracted sequence of outburst-causing indicator principal components were used as the input variables for the simulated annealing particle swarm algorithm (SAPSO), which was proposed to optimize the input layer weights and implied layer thresholds of the ELM. Finally, a coal and gas outburst risk prediction model for a deep coal mine based on the SAPSO-ELM algorithm was developed. The research results show that, compared with the ELM and PSO-ELM algorithms, the SAPSO-ELM optimization algorithm significantly improved the accuracy of risk prediction for coal–gas outbursts in deep coal mines, and the accuracy rate was as high as 100%. This study enriches the theory and methods of safety management in deep coal mines, and effectively helps coal mine enterprises in improving their ability to manage coal–gas outburst risks.
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Fan, Chaojun, Haiou Wen, Sheng Li, Gang Bai, and Lijun Zhou. "Coal Seam Gas Extraction by Integrated Drillings and Punchings from the Floor Roadway considering Hydraulic-Mechanical Coupling Effect." Geofluids 2022 (January 7, 2022): 1–10. http://dx.doi.org/10.1155/2022/5198227.

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Owing to the exhaustion of shallow coal resources, deep mining has been occupied in coal mines. Deep buried coal seams are featured by the great ground stress, high gas pressure, and low permeability, which boost the risk of gas disasters and thus dramatically threaten the security about coal mines. Coal seam gas pressure and gas content can be decreased by gas extraction, which is the primary measure to prevent and control mine gas disasters. The coal mass is simplified into a continuous medium with dual structure of pores and fractures and single permeability. In consideration of the combined effects of gas slippage and two-phase flow, a hydraulic-mechanical coupling model for gas migration in coals is proposed. This model involves the equations of gas sorption and diffusion, gas and water seepage, coal deformation, and evolution of porosity and permeability. Based on these, the procedure of gas extraction through the floor roadway combined with hydraulic punching and ordinary drainage holes was simulated, and the gas extraction results were used to evaluate the outburst danger of roadway excavation and to verify the engineering practice. Results show that gas extraction can reduce coal seam gas pressure and slow down the rate of gas release, and the established hydraulic-mechanical coupling model can accurately reveal the law of gas extraction by drilling and punching boreholes. After adopting the gas extraction technology of drilling and hydraulic punching from the floor roadway, the remaining gas pressure and gas content are reduced to lower than 0.5 MPa and 5.68 m3/t, respectively. The achievements set a theoretical foundation to the application of drilling and punching integrated technology to enhance gas extraction.
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Geng, Mei Hua, Xiu Jiang Lv, and Xiao Gang Zhang. "The Structural Analysis of Deep Gas Occurrence and Prevention of Gas Disaster in Fengfeng Coalfield." Advanced Materials Research 734-737 (August 2013): 484–87. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.484.

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The geological structure is an important factor of gas occurrence in coal seam, and the gas occurrence in deep coal seam should be paid attention to enough because the occurrence was more controlled by geological structure and influence. Taken Fengfeng coalfield as target in this paper, the geological structure of this coalfield was described. The deep coal mining district which is monoclinic structure in Fengfeng is located in the east of Gushan anticlinoria, which the junior small anticlines and synclines of the sub-echelon are well developed. And regional fault structures are intensive, the pressure structure is the major structure among this region. The characteristics of geological structure in Fengfeng coalfield were analyzed. The tensional structure planes and pressure structure are the major effect factors, and the latter is the main form of gas occurrence in deep. Some suggestions on safe of deep mining in high gas environment is also put forward, in order to provide theoretical support for the deep coal mining and gas disaster prevention.
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Yin, Zhiqiang, Zhiyu Chen, Jucai Chang, Zuxiang Hu, Haifeng Ma, and Ruimin Feng. "Crack Initiation Characteristics of Gas-Containing Coal under Gas Pressures." Geofluids 2019 (February 7, 2019): 1–12. http://dx.doi.org/10.1155/2019/5387907.

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In deep coal mines, coal before the working face is subjected to coupled high mining-induced stress and gas pressure. Such condition may facilitate crack formation and propagation in the coal seam, leading to serious coal and gas disasters. In this study, the mechanical properties (i.e., uniaxial compressive strength, tensile strength, and fracture toughness) of gas-containing coal with four levels of initial gas pressure (i.e., 0.0, 0.5, 1.0, and 1.5 MPa) were investigated by uniaxial compression, Brazilian disc, and notched semicircular bending loading test. A newly developed gas-sealing device and an RMT-150 rock mechanics testing machine were used. Fracture modes under different initial gas pressures were also determined. A theoretical method of fracture mechanics was used to analyze crack initiation characteristics under gas adsorption state. Results show that the uniaxial compressive strength, tensile strength, and fracture toughness of gas-containing coal decreased with increasing initial gas pressure. The tensional fracture occurred in gas-containing coal under uniaxial compressive loading with high gas pressure. Cracks in gas-containing coal propagated under small external loads due to the increase in effective stress of crack tip and decrease in cracking strength. This study provided evidence for modifications of the support design of working face in deep coal mines. Furthermore, the correlations between fracture toughness, compressive strength, and tensile strength of gas-containing coal were investigated.
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Sun, Haitao, Linchao Dai, Jun Lu, Jie Cao, and Minghui Li. "Analyzing Energy Transfer Mechanism during Coal and Gas Protrusion in Deep Mines." Processes 10, no. 12 (December 8, 2022): 2634. http://dx.doi.org/10.3390/pr10122634.

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Coal is the mainstay of China’s energy supply. With the gradual progress in China’s policy of phasing out backward coal production capacity, the intensive and deep mining of coal has gradually become the new norm. The current mining depth is increasing at a rate of 10~15 m/year. The high crust stress, high gas pressure, high ground temperature, and engineering disturbance stress in deep coal mines can lead to the occurrence of coal–rock–gas dynamic disasters that are complex and show the characteristics of compound dynamic disasters. It is important to understand the evolution and mechanism of deep coal and rock dynamic disasters accurately for the safe development of deep resources. To study the mechanism of occurrence and the evolution of impact–protrusion compound dynamic disasters, we herein analyzed the apparent characteristics of coal–rock–gas compound dynamic disasters in deep mines and obtained the mechanical and acoustic emission characteristics of coal–rock composites through indoor experiments. Then, we conducted in-depth analysis on the non-uniform deformation behaviors and non-uniform stress field of the coal–rock composite and clarified the generation mechanism of local tensile cracks at the coal–rock interface. Subsequently, we established the energy transfer model of the rock–rock–gas composite specimen in the process of dynamic destabilization in the engineering scale mining field and revealed the mechanism of nonlinear energy evolution and release of the coal–rock–gas composite, which has been less reported in previous studies. In this paper, we further clarified the occurrence and development mechanism of coal–rock–gas compound dynamic disasters in the engineering scale mining environment to guide the prevention and control of coal–rock–gas dynamic disasters in deep mines.
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Sun, Yingfeng, Qingxia Lin, Shuaipeng Zhu, Chujian Han, Xiaoliang Wang, and Yixin Zhao. "NMR investigation on gas desorption characteristics in CBM recovery during dewatering in deep and shallow coals." Journal of Geophysics and Engineering 20, no. 1 (January 18, 2023): 12–20. http://dx.doi.org/10.1093/jge/gxac090.

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Abstract Coalbed methane (CBM) development requires dewatering until the reservoir pressure is less than the critical desorption pressure. Significant quantities of CBM in China are buried >1000 m deep. Therefore, the desorption characteristics of deep CBM reservoirs must be investigated for the further development of deep CBM. In this study, the variation laws of adsorbed and free CH4 during adsorption in dry samples and during desorption via dewatering are investigated using nuclear magnetic resonance. During CH4 adsorption in dry samples by increasing CH4 pressure and during CH4 desorption in water-injected samples by dewatering, a Langmuir relationship exists between the volume of adsorbed CH4 and the pressure in deep and shallow coals, and the volume of free CH4 and the pressure are linearly related. When the pressure is the same, the volume of adsorbed CH4 in the dry coal samples during adsorption is larger than that in the water-injected samples during desorption by dewatering. When the pressure is the same, for the difference in the adsorbed CH4 volume between adsorption and desorption isotherms, shallow coal is less significant than deep coal. The slopes of free CH4 in deep coal are lower than those in shallow coal during adsorption and desorption.
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Shasha, Si, Wang Zhaofeng, Zhang Wenhao, and Dai Juhua. "Study on Adsorption Model of Deep Coking Coal Based on Adsorption Potential Theory." Adsorption Science & Technology 2022 (August 8, 2022): 1–13. http://dx.doi.org/10.1155/2022/9596874.

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With the exhaustion of coal resources in shallow coal seams, many mining areas have moved to deep mining, and the coal storage environment is obviously affected by the mining depth, mainly manifested as the increase of gas pressure and temperature, which makes the adsorption characteristics of deep coal seam gas much more complicated than shallow coal seam. Based on this, this paper chooses Pingdingshan coking coal as the research object, using Hsorb-2600 high-temperature and high-pressure gas adsorption instrument to carry on isothermal adsorption experiment. According to the adsorption theory and the uniqueness of the adsorption characteristics cure, the adsorption model was analyzed and studied. The results show that the predicted curve of coal seam gas adsorption isotherm is in good agreement with the measured curve, the relative error is less than 10%, and the adsorption characteristic curve is logarithmic. At the same time, the model is used to study the variation of adsorbed gas amount with mining depth. The results show that the adsorbed gas amount increases first and then decreases with coal burial depth.
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Zhao, Zhi Gen, Jia Chen, and Jia Ping Yan. "Features of Jianshanchong Klippe and its Control to Gas Geology at Qingshan Coal Mine, Jiangxi Province." Applied Mechanics and Materials 164 (April 2012): 501–5. http://dx.doi.org/10.4028/www.scientific.net/amm.164.501.

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The coal and gas outburst is serious at Qingshan Coal Mine of Jiangxi Province, so it is of significance to research the features of Jianshanchong klippe and its control to gas geology. The research reveals that: Jianshanchong klippe is distributed from the east boundary of Qingshan Coal Mine to No. 45 Exploration Line, its transverse profile is like a funnel while its longitudinal profile is like a wedge, northwest side of the klippe is thicker and deeper while southeast side is thinner and more shallow. Because of the cover and insert of Jianshanchong klippe, the structure of coal-bearing strata is more complex, some secondary folds are formed, and also, the coal seam is changed greatly, the tectonic coal is well developed and the coal seam is suddenly thickening or thinning. Due to the effect of Jianshanchong klippe, the coal and gas outbursts occur in the area of secondary folds, thicker coal seams or tectonic coals. Concerning the prediction of gas geology in deep area, in view of the facts including simpler structure, stable coal seam and decreased thickness, the gas emission rate and the coal and gas outburst will decrease in Fifth and Sixth Mining Level than that in Second and Third Mining Level
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Zhu, Junqi, Li Yang, Xue Wang, Haotian Zheng, Mengdi Gu, Shanshan Li, and Xin Fang. "Risk Assessment of Deep Coal and Gas Outbursts Based on IQPSO-SVM." International Journal of Environmental Research and Public Health 19, no. 19 (October 8, 2022): 12869. http://dx.doi.org/10.3390/ijerph191912869.

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Coal and gas outbursts seriously threaten the mining safety of deep coal mines. The evaluation of the risk grade of these events can effectively prevent the occurrence of safety accidents in deep coal mines. Characterized as a high-dimensional, nonlinear, and small-sample problem, a risk evaluation method for deep coal and gas outbursts based on an improved quantum particle swarm optimization support vector machine (IQPSO-SVM) was constructed by leveraging the unique advantages of a support vector machine (SVM) in solving small-sample, high-dimension, and nonlinear problems. Improved quantum particle swarm optimization (IQPSO) is used to optimize the penalty and kernel function parameters of SVM, which can solve the optimal local risk and premature convergence problems of particle swarm optimization (PSO) and quantum particle swarm optimization (QPSO) in the training process. The proposed algorithm can also balance the relationship between the global search and local search in the algorithm design to improve the parallelism, stability, robustness, global optimum, and model generalization ability of data fitting. The experimental results prove that, compared with the test results of the standard SVM, particle swarm optimization support vector machine (PSO-SVM), and quantum particle swarm optimization support vector machine (QPSO-SVM) models, IQPSO-SVM significantly improves the risk assessment accuracy of coal and gas outbursts in deep coal mines. Therefore, this study provides a new idea for the prevention of deep coal and gas outburst accidents based on risk prediction and also provides an essential reference for the scientific evaluation of other high-dimensional and nonlinear problems in other fields. This study can also provide a theoretical basis for preventing coal and gas outburst accidents in deep coal mines and help coal mining enterprises improve their safety management ability.
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Jiang, Guo Ping. "The Studies on Gas-Bearing Characteristics of Deep Coal Seams in Yanchang Oil and Gas Province, China." Advanced Materials Research 962-965 (June 2014): 213–16. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.213.

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In this paper, four general directions are described to make evaluations and their resource potential; those are coal structure and coal level, gas content of deep coalbed, the coalbed thickness and distribution and the buried depth of coalbed. Coalfields of the study area are mainly Permian and Carboniferous coal seam of Shanxi Formation coal and Benxi group 11 # coal, coal seam depth 1370-1812m. No. 3 coal-seam average layer thickness of 1.6 m, the monolayer most 2 m thick; No. 11 coal-seam in the average layer thickness of 3 m, single-layer thickness of 4.5 m. Predict the amount of coal resources of 17.3 one hundred million t. Predict coal-bed methane resources of 27.68 billion cubic reserve abundance of 104 million square / km2 in. The exploration results show that this region has good development prospects.
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Dissertations / Theses on the topic "Deep coal gas"

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Dunlop, Erik Christopher. "Controls on Gas Production from Permian Ultra-deep Coal Seams of the Cooper Basin: Expanding Reservoir Boundary Theory." Thesis, 2019. http://hdl.handle.net/2440/123421.

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This thesis reveals atypical dynamic reservoir behaviour within Cooper Basin ultra-deep coal seams during gas production that calls for a paradigm shift in gas extraction technology, diametrically opposed to the evolutionary path of current drilling, wellbore completion, and reservoir stimulation practices. An anomalous geomechanical reservoir boundary condition is detected that is, by definition, mostly restricted to ultra-deep coal seams. The discovery has resulted in the formulation of a new coal seam reservoir concept - “Expanding Reservoir Boundary Theory”. Ultra-deep Permian coal seams of the Cooper Basin in central Australia represent a nascent thermogenic source rock reservoir play. Proof-of-concept gas flow occurred in 2007. The vast (100+ Tscf) potential resource is comparable in commercial significance, and technical challenge, to the shale gas plays of North America. As with shale, full-cycle, standalone commercial gas production from Cooper Basin ultra-deep coal seams requires a large, complex, permeable “stimulated reservoir volume” (SRV) domain having high fracture / fabric face surface area for gas desorption. This goal has not yet been achieved after 13 years of trials because, owing to the bipolar combination of coal-like geomechanical properties and shale-like reservoir properties, these poorly cleated, inertinitic coal seams exhibit “hybrid” characteristics. This is problematic for achieving effective reservoir stimulation, and poses the greatest immediate challenge. Stimulation techniques adopted from other play types are incompatible with the highly unfavourable combination of nanoDarcy-scale permeability, “ductility”, and high stress. The Cooper Basin Deep Coal Gas (CBDCG) Play commences 6,000 feet (1,830 metres) below the “commercial permeability depth limit” for most shallow coal seam gas (CSG) reservoirs but this does not reduce gas flow potential. Shale gas industry technologies have, in principle, eliminated the requirement for naturally occurring coal fabric permeability. Optimum reservoir conditions occur at depths beyond 9,000 feet (2,740 metres), driven by very low water saturation, high gas content, gas oversaturation, overpressure, rigid host rock strata, and high deviatoric stress. The limited literature does not yet adequately characterise the physical response of ultra-deep coal seams, and the surrounding host rock strata, to production pressure drawdown. It remains to be established how artificial fracture and coal fabric aperture width change as a consequence of the dynamic, diametric competition between gas desorption-induced coal matrix shrinkage and the omnipresent tendency for reservoir compaction caused by increasing production pressure drawdown-induced effective stress. This technical impasse, inhibiting commercialisation, is addressed by analysing the atypical flowback behaviour of hydraulically fracture stimulated coal seams within a dedicated vertical wellbore at 9,500 feet (2,900 metres). High-resolution, non-classical flowback analysis is performed on the pure dataset of Australia’s first ultra-deep coal gas well. Wellhead and fracture network pressures are recorded continuously for 8 1/2 years, at a 10-minute sample interval, while flowing to atmosphere. Natural flowback behaviour is analogous to that of a mechanical gas plunger artificial lift system. A low but gradually increasing quasi-steady state base gas flow, free of produced formation water, is overprinted by a non-steady state, cyclical pressure signature that is diagnostic of dynamic reservoir behaviour during gas production. A total of 114 high-rate, “geyser-like” gas surge events, gradually increasing in duration from 2 hours to 2 weeks, and in reservoir equivalent volume from 360 to 20,000 rcf (10 to 570 rcm), suggest the gas headspace compartment of a “down-hole void space domain” is steadily increasing in size. The gas surge events result from intermittent release of fracture network gas, hydrostatically compressed by flowback fluid slowly accumulating within the wellbore. A production “history match” for the gas surge event pressure profile is obtained by designing, fabricating, operating, and data logging a computer-controlled hydraulic apparatus within The University of Adelaide’s experimental wellbore, at a depth of 230 feet (70 metres). This physically simulates open-ended flowing manometer-like hydrodynamic behaviour of the wellbore-reservoir system. A postulated geological trigger mechanism for surge initiation is tested and validated; “wellbore hydrostatic back-pressure and reservoir stress-dependent leak-off”. Time-lapse pressure transient analysis (PTA) is performed on three extended wellbore pressure build-up tests, lasting 157, 259, and 295 days respectively. Increasing permeability is recognised within coal fabric surrounding the initial fracture network SRV domain. Time-lapse rate transient analysis (RTA) performed on the first two subsequent wellbore pressure “blow-down to atmosphere” (BDTA) gas flow rate decline profiles indicates that hydraulic fracture flow conductivity increased during the intervening 327-day flowback period. Interpreted dilation of hydraulic fracture apertures is supported by a 60% increase in the initial BDTA gas flow rates, from 7.5 to 12.0 MMscfd (212.4 to 340.0 Mscmd). Cooper Basin ultra-deep coal gas reservoirs behave differently to other deep, thermogenic source rock reservoirs, and require a paradigm shift in reservoir stimulation technology that does not rely exclusively upon hydraulic fracture stimulation and the “brittleness factor”. Pressure arching may fill this role by neutralising the omnipresent tendency for reservoir compaction caused by increasing production pressure drawdown-induced effective stress. The combined, mutually sustaining actions of desorption-induced coal matrix shrinkage and sympathetic pressure arch “stress shield” evolution generate an “expanding reservoir boundary and decreasing confining stress” condition that allows producing ultra-deep coal seams, and adjacent strata indirectly (which may include other reservoir types), to progressively de-stress and “self-fracture” in an overall state of endogenous tensile failure. As with underground coal mine excavations, pressure arching will deflect maximum stress vectors around the dilating “dispersed coal fabric void space” domain of a growing fracture network SRV domain that has developed reduced bulk structural integrity, and reduced bulk compressive strength, compared to the surrounding native coal seam and host rock strata. Size and effectiveness of pressure arching increases with depth. Cooper Basin ultra-deep coal seams, and adjacent “non-coal” reservoirs indirectly, may be effectively stimulated to flow gas on a large scale by harnessing this self-perpetuating, depth-resistant mechanism for creating coal fracture / fabric permeability and surface area for gas desorption. They may be induced to pervasively “shatter”, or “self-fracture”, naturally during gas production, independent of the lack of “brittleness”, analogous to the manner in which shrinkage crack networks slowly form, in a state of intrinsic, endogenous tension, within desiccating clay-rich surface sediment. Full-cycle, standalone commercial gas production is considered likely to occur when “Expanding Reservoir Boundary Theory” is applied, so as to replicate the very large, complex fracture network SRV domain of commercial shale gas reservoirs.
Thesis (Ph.D.) -- University of Adelaide, Australian School of Petroleum, 2020
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Books on the topic "Deep coal gas"

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Shue, Henry. Mitigation. Edited by Stephen M. Gardiner and Allen Thompson. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780199941339.013.41.

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Mitigation—preventative actions to reduce the human forcing of climate change with the goal of keeping climate change within a range to which humans can adapt—must be prompt, rigorous, and focused on eliminating emissions of carbon dioxide, beginning with rapid cessation of the use of coal. Carbon dioxide is by far the most threatening greenhouse gas because it remains in the atmosphere for millennia longer than any other major greenhouse gas, and the heat retained on the planet by atmospheric carbon dioxide will continue to emerge from its transitional storage in the deep oceans for millennia after the atmospheric carbon finally dissipates. Sustainable development can be increased and ocean acidification can be stopped only if the dominant fossil fuel regime is promptly replaced by an affordable and accessible alternative energy regime. Poorer countries cannot be reasonably expected to cooperate with vigorous mitigation unless they are assisted with necessary adaptation.
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Book chapters on the topic "Deep coal gas"

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Xin, Lin, Kaixuan Li, Mingze Feng, and Jiaze Li. "Feasibility analysis and evaluation of in-situ two-stage gasification of deep coal seam to produce high hydrogen coal gas." In Advances in Geology and Resources Exploration, 567–77. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003308584-80.

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Nguyen, Van-Duc, Chang-Woo Lee, Xuan-Nam Bui, Hoang Nguyen, Quang-Hieu Tran, Nguyen Quoc Long, Qui-Thao Le, et al. "Evaluating the Air Flow and Gas Dispersion Behavior in a Deep Open-Pit Mine Based on Monitoring and CFD Analysis: A Case Study at the Coc Sau Open-Pit Coal Mine (Vietnam)." In Lecture Notes in Civil Engineering, 224–44. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60839-2_12.

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Stevens, Scott H., Vello A. Kuuskraa, Denis Spector, and Pierce Riemer. "CO2 sequestration in deep coal seams." In Greenhouse Gas Control Technologies 4, 175–80. Elsevier, 1999. http://dx.doi.org/10.1016/b978-008043018-8/50029-1.

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Zhulay, Yuriy, and Olexiy Nikolayev. "Advanced Technology of Drilling and Hydraulic Loosening in Coal Bed Methane Using a Cavitation Hydrovibrator. Experience and Prospects." In Drilling Engineering and Technology - Recent Advances, New Perspectives and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105812.

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Modern progressive technologies use static fluid injection into seams for safe and cost-effective operation of coal seams. However, the deterioration of mining and geological conditions leads to a significant decrease in the efficiency of the process of methane sequestration from coal seams in case of increase in the depth of development of gas-bearing coal seams. This deterioration is due to a change in the stress-strain state of deep rock massifs, their low permeability, strong anisotropy of soft coal, leading to an increase in dynamic manifestations of rock pressure in the form of sudden outbursts of coal and gas, and rock destructions with catastrophic consequences. An advanced technology for hydraulic loosening and recovery of methane from gas-bearing coal seams, based on the creation of hydrodynamic impulses in a well surface and their transformation into mechanical vibration loading to coal seam, was developed. Such impact to the coal mass leads to the development of a system of cracks. As a result, the efficiency of coalbed hydraulic loosening increases, the zones of moistening and unloading of the formation increase, the gas emission of methane is intensified, the level of dust formation and the resistance of coal to cutting during its destruction are reduced.
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Liu, S. Y., C. H. Wei, W. C. Zhu, and Y. J. Yu. "Temperature and pressure dependent gas diffusion coefficient in coal: Numerical modeling and experiments." In Deep Rock Mechanics: From Research to Engineering, 403–11. CRC Press, 2018. http://dx.doi.org/10.1201/9781351042666-40.

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HETHERINGTON, J., and K. THAMBIMUTHU. "In-Situ Gasification, Enhanced Methane Recovery and CO2 Storage in Deep Coal Seams." In Greenhouse Gas Control Technologies - 6th International Conference, 709–16. Elsevier, 2003. http://dx.doi.org/10.1016/b978-008044276-1/50113-6.

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Zallen, Jeremy. "Dungeons and Dragons and Gaslights." In American Lucifers, 94–135. University of North Carolina Press, 2019. http://dx.doi.org/10.5149/northcarolina/9781469653327.003.0004.

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Antebellum ruling classes debated the role and relationships of states, commerce, industry, and slavery surrounding gaslight. For boosters in New Orleans and other Southern cities industrial slavery was the sine qua non of their gaslit modernity. For Northern industrial heralds, it was the automation and absence (or invisibility) of labor that made gaslight systems at once so attractive and so contentious. But it was in the spaces of production that slavery, freedom, and industry were most violently configured. Frontiers of bituminous (gas) coal accumulation multiplied deep underground, and in the eastern seaboard, that meant Richmond mines. There, planters and industrial slaveholders used slave life insurance policies and safety lamps to recruit and compel mixed armies of slaves and wage laborers to work ever-more dangerous coal mines, while all struggled to assert some control over this antebellum empire of light and energy. When it came to light, the arrow of change in the antebellum United States seemed to point towards an increasing role for slavery within processes of industrial capitalism rather than its displacement by free labor regimes. Looking at the production and consumption of gas coals changes how we must think of the making of the “modern” or “liberal” city.
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Liu, Fang-Bin, and Yuan-Sheng Wang. "Experimental investigations on gas emission rules during fully-mechanized developing entries in deep and high-gas coal seams." In Progress in Mine Safety Science and Engineering II, 1105–8. CRC Press, 2014. http://dx.doi.org/10.1201/b16606-208.

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A. Sokama-Neuyam, Yen, Muhammad A.M. Yusof, and Shadrack K. Owusu. "CO2 Injectivity in Deep Saline Formations: The Impact of Salt Precipitation and Fines Mobilization." In Carbon Sequestration [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104854.

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Climate change is now considered the greatest threat to global health and security. Greenhouse effect, which results in global warming, is considered the main driver of climate change. Carbon dioxide (CO2) emission has been identified as the largest contributor to global warming. The Paris Agreement, which is the biggest international treaty on Climate Change, has an ambitious goal to reach Net Zero CO2 emission by 2050. Carbon Capture, Utilization and Storage (CCUS) is the most promising approach in the portfolio of options to reduce CO2 emission. A good geological CCUS facility must have a high storage potential and robust containment efficiency. Storage potential depends on the storage capacity and well injectivity. The major target geological facilities for CO2 storage include deep saline reservoirs, depleted oil and gas reservoirs, Enhanced Oil Recovery (EOR) wells, and unmineable coal seams. Deep saline formations have the highest storage potential but challenging well injectivity. Mineral dissolution, salt precipitation, and fines mobilization are the main mechanisms responsible for CO2 injectivity impairment in saline reservoirs. This chapter reviews literature spanning several decades of work on CO2 injectivity impairment mechanisms especially in deep saline formations and their technical and economic impact on CCUS projects.
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Scanlan, Melissa K. "Renewable Energy." In Prosperity in the Fossil-Free Economy, 146–83. Yale University Press, 2021. http://dx.doi.org/10.12987/yale/9780300253993.003.0009.

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This chapter looks at the monumental effort of deep decarbonization that requires a strategic focus on the largest sectors of emissions and an implementable plan to rapidly transform systems in order to reduce greenhouse gas (GHG) contributions. It describes fossil fuel extraction, processing, and combustion for energy as the single largest cause of GHG emissions in the world. It also talks about emissions from electricity and heat production, industry, transportation, and other energy that are caused by extracting, processing, and burning fossil fuels. The chapter highlights that global electricity generation remains dominated by coal, which is the dirtiest of all fossil fuels. It highlights the creation of electricity with renewable energy and shift to more heating, transportation, and industry to renewable electricity, which is the great challenge and opportunity of this time on Earth.
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Conference papers on the topic "Deep coal gas"

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Kuuskraa, V. A., and R. E. Wyman. "Deep Coal Seams: An Overlooked Source for Long-Term Natural Gas Supplies." In SPE Gas Technology Symposium. Society of Petroleum Engineers, 1993. http://dx.doi.org/10.2118/26196-ms.

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Emelyanova, I. "Multi-Input Deep Learning Classifier for Predicting Gas in Deep Coal Seams." In 82nd EAGE Annual Conference & Exhibition. European Association of Geoscientists & Engineers, 2020. http://dx.doi.org/10.3997/2214-4609.202012137.

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Cheng, Genyin, Yifei Zhou, Liming Qi, Shan Feng, and Jian Cao. "Study on laws of gas occurrence and emission of deep coal seam in Yaoqiao Coal Mine." In 2015 4th International Conference on Sensors, Measurement and Intelligent Materials. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icsmim-15.2016.148.

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Cooper, Gareth, Duncan Lockhart, and Ainslie Walsh. "The Permian Deep Coal Play, Cooper Basin, Australia. Unlocking the Next Gas Giant." In SPE Asia Pacific Oil and Gas Conference and Exhibition. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/191963-ms.

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Gao, Shengli, and Pengpeng Gao. "Deep Coal Reservoir Characteristics and Gas-bearing Potential of the Ordos Basin, China." In Proceedings of the 2019 2nd International Conference on Sustainable Energy, Environment and Information Engineering (SEEIE 2019). Paris, France: Atlantis Press, 2019. http://dx.doi.org/10.2991/seeie-19.2019.33.

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Jiang, Xu, Peng Shoujian, Zhang Dandan, and Yang Hongwei. "Research on Gas Distribution Pattern in Deep Coal-Bed Based on In-situ Detection." In 2010 International Conference on Digital Manufacturing and Automation (ICDMA). IEEE, 2010. http://dx.doi.org/10.1109/icdma.2010.132.

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Green, Leon. "Indirect Firing of Gas Turbines by Residual Coal-Water Fuel." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-168.

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Production of low-ash, low-sulfur coal-water fuel (CWF) will yield large quantities of high-ash but still low-sulfur “residual” CWF analogous to the residual fuel oil produced by petroleum refining. Relatively low in cost compared to the premium, low-ash CWF product, “resid” CWF will thus be available for in-plant industrial generation of conventional steam power or process heat. Due to its low sulfur content, however, a higher-value use of such a compliance fuel can be the indirect firing of gas turbines for the more efficient combination of power generation plus subsequent bottoming-cycle use or process heat applications (cogeneration). To limit NOx emissions, staged combustion will be required. Such operation can be accomplished starting with substoichiometric CWF reaction in “conventional” slurry burners followed by final combustion completed in the bottom region of a deep, intensely-mixed, fludized-bed heat exchanger. By virtue of the highly enhanced heat-transfer characteristics of the strongly-stirred bed of non-reactive particles, the normal limitation of rates of non-pressurized fire-side heat transfer is elevated. The fuel ash particles, milled fine by passage through the bed of refractory heat-transfer particles, are collected in a conventional baghouse. The conceptual design of such a combustion-driven, fluid-bed heat exchanger system fired by high-ash, residual coal-water fuel is outlined and its advantages over a conventional fluid-bed, solid-coal combustor for indirect firing of gas turbines are enumerated.
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Zhang*, Xianxu, Jinfeng Ma, Lin Li, and Haofan Wang. "Research on dynamic monitoring technology of 4D seismic in coal mine goaf." In 2nd SEG Rock Physics Workshop: Challenges in Deep and Unconventional Oil/Gas Exploration, 25–27 October 2019, Qingdao, China. Society of Exploration Geophysicists, 2020. http://dx.doi.org/10.1190/rpwk2019-037.1.

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9

Alleyne, N. A., and V. Stoute. "Options for Monetising Deep Water Gas in Trinidad and Tobago." In SPE Energy Resources Conference. SPE, 2014. http://dx.doi.org/10.2118/spe-169926-ms.

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Abstract Notwithstanding the global thrust to develop renewable sources of energy, fossil fuels, coal, crude oil and natural gas are expected to play a significant role in meeting the world's energy needs for decades to come. Natural gas with the highest hydrogen concentration among the fossil fuels is the preferred fossil fuel from an environmental impact standpoint. Trinidad and Tobago, like the rest of the world, is taking its petroleum exploration activities into deep water, its onshore and continental shelf provinces being fully explored. The development of petroleum reservoirs in deep water has many challenges. This paper explores the unique challenges posed by developing deep water gas fields with a focus on the options available for monetising the natural gas produced from these fields. The options for getting gas to market are well known and include pipelines, liquefied natural gas (LNG), compressed natural gas (CNG), gas to solid petrochemicals (GTS), gas to liquids (GTL) and gas to wire (GTW). Most of these options are operating in Trinidad and Tobago. The paper evaluates the financial outcomes from applying the pipeline, LNG and CNG options, either offshore or onshore, for gas extracted from deep water fields across a range of reserve levels and well productivities. It aims to establish criteria for deciding which means of monetisation is preferred. The reserve and productivity ranges reflect typical values encountered in the deep water provinces in Latin America, North America and Africa. These provinces account for 85% of all the deep water fields and 74 % the deep water reserves which have been discovered worldwide. Because the paper focuses on the monetisation of natural gas, its findings will be applicable to any successful deep water exploration in Trinidad and Tobago because all situations, even the discovery of oil, will require that the associated gas be handled. The handling of gas has the potential of being on the critical path in deciding on the development of deep water fields in Trinidad and Tobago.
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Fraser, Samuel A., and Raymond L. Johnson Jr. "Impact of Laboratory Testing Variability in Fracture Conductivity for Stimulation Effectiveness in Permian Deep Coal Source Rocks, Cooper Basin, South Australia." In SPE Asia Pacific Oil and Gas Conference and Exhibition. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/191883-ms.

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