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Relevant bibliographies by topics / Rock abrasivity

Academic literature on the topic 'Rock abrasivity'

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Journal articles on the topic "Rock abrasivity"

1

Kaspar, M., C. Latal, M. Blümel, and G. Pittino. "Is soft rock also non-abrasive rock? An evaluation from lab testing campaigns." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (January 1, 2023): 012019. http://dx.doi.org/10.1088/1755-1315/1124/1/012019.

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Abstract Soft rocks are traditionally regarded in terms of low uniaxial compressive strength (UCS <25 MPa). However, other geomechanical and geological properties such as mineralogical composition, and microstructure should be considered when characterizing the properties of soft rocks. The term soft rocks includes a broad variety of rocks coming from various geological origins. Fabric and state of weathering control inherent anisotropic properties of strength and abrasivity of the various rock types. In this study, a suite of rocks from different geologic settings in the Austrian Alps and surrounding countries is analyzed to evaluate connections between the UCS, CERCHAR Abrasivity Index (CAI), and mineralogical composition (equivalent quartz content - FEQu) with emphasis on soft rocks. It is shown, that in order to assess the properties of soft rocks more accurately, the classification scheme can be expanded beyond the simple UCS approach by including mineralogical information and abrasivity values. This holistic approach more adequately captures the breadth of soft rock properties and allows a differentiated distinction of soft rocks in terms of strength and hardness.

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2

Aderhold, M., C. Disselkamp, R. Formanski, M. Grimberg, A. M. Grineisen, L. M. Kroenert, M. S. Ogan, et al. "Comparison of different methods to characterise the abrasivity potential and mechanical properties of carbonates with respect to its relevance for practical purposes in excavation technologies." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (January 1, 2023): 012044. http://dx.doi.org/10.1088/1755-1315/1124/1/012044.

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Abstract The characterisation of the abrasivity potential of carbonates plays an important role for drilling-based excavation technologies, for example in tunneling or geothermal exploration. Although carbonates are known to have a rather low abrasivity, they have been associated with severe excavation performance reductions. We compared different methods to characterise the abrasivity potential of carbonates with respect to its applicability for practical purposes in excavation technologies. In this study, seven carbonate rocks were investigated which differ with respect to their microstructural properties and degrees of dolomitisation. These carbonate rock samples were selected from different lithological units in Germany (Jurassic: Kelheimer limestone, Wachenzell dolomite, Solnhofen limestone, Pappenheim limestone, Treuchtlingen limestone; Devonian: Wülfrath limestone, Brilon limestone). Rock samples were characterised with respect to basic physical properties (density, ultrasound velocity), microstructure (thin section analysis, XRD), mechanical properties (uniaxial compressive strength UCS, splitting tensile strength STS) and commonly applied abrasivity indices (Cerchar abrasivity index test CAI, LCPC test) as well as derived indices (equivalent quartz content eQu). Our results confirm that the tested carbonate rocks show low abrasivity indices in terms of CAI, LCPC and eQu with an increase in abrasivity potential with increasing dolomite content. The microstructural properties play an important role for the abrasiveness of purely calcitic carbonates. Uniaxial compressive strength and splitting tensile strength were high and can additionally be, as has been shown before, particularly sensitive to sample preparation. We conclude that carefully determining the mechanical properties of carbonate rock samples in combination with common approaches to determine the abrasivity potential is key to properly predict tool wear, and required to derive information on performance in carbonate rocks. This study is the outcome of a research-oriented teaching program at Ruhr-University Bochum within the Geoscience curriculum for students with focus on Engineering Geology. Student authors are listed in alphabetical order (Aderhold to Zinke).

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3

Mucha, Kamil. "The new method for assessing rock abrasivity in terms of wear of conical picks." New Trends in Production Engineering 2, no. 1 (October 1, 2019): 186–94. http://dx.doi.org/10.2478/ntpe-2019-0019.

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Abstract During the exploitation of mineral raw materials, a cutting tool is an element that is directly in contact with the unmined stone being cut. The most commonly used cutting tools include conical picks. The increasing pressure to reduce mining costs causes an increasing demand for affordable and reliable ways to increase the reliability of mining machines. Abrasive wear is the most common process affecting the wear of shearer picks, hence a good and simple laboratory method for assessing rocks abrasivity is needed. The new method was developed in the aspect of selection of conical picks with appropriate protection of the pick working part, increasing its durability. The method involves the assessment of mass abrasive wear of a standard steel pin and rock sample, and the determination of the abrasivity index Wz of the tested rock, as the ratio of the mass loss of the steel pin to the mass loss of the rock sample. The article presents the procedure of conducting tests, construction of a laboratory test stand and the use of the developed method to assess the abrasivity of gangue rocks occurring in the currently cut tunnel excavations of Polish hard coal mines.

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Alber, Michael, Olgay Yaralı, Filip Dahl, Amund Bruland, Heiko Käsling, Theodore N. Michalakopoulos, Marilena Cardu, Paul Hagan, Hamit Aydın, and Ahmet Özarslan. "ISRM Suggested Method for Determining the Abrasivity of Rock by the CERCHAR Abrasivity Test." Rock Mechanics and Rock Engineering 47, no. 1 (December 1, 2013): 261–66. http://dx.doi.org/10.1007/s00603-013-0518-0.

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5

Pal, Samir Kumar, K. U. M. Rao, P. Sathish Kumar, and R. Rajasekar. "Influence of Rock Properties on Wear of M and SR Grade Rubber with Varying Normal Load and Sliding Speed." Archives of Metallurgy and Materials 62, no. 3 (September 26, 2017): 1787–93. http://dx.doi.org/10.1515/amm-2017-0271.

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AbstractRubbers are interesting materials and are extensively used in many mining industries for material transportation. Wear of rubber is a very complex phenomenon to understand. The present study aims to explain the influence of rock properties on wear of M and SR grade rubber used in top cover of conveyor belts. Extensive laboratory experiments were conducted under four combinations of normal load and sliding speed. The wear of both the rubber types were analyzed based on the rock properties like shear strength, abrasivity index and fractal dimension. A fully instrumented testing set up was used to study the wear of rubber samples under different operating conditions. In general, wear was higher for M grade rubber compared to SR grade rubber. Increase in shear strength of rocks depicts decreasing trend for the wear of M and SR grade rubber at lower load conditions. Moreover, a higher load combination displays no definite trend in both the rubbers. The strong correlation between the wear of rubber and frictional power for all rubber-rock combinations has given rise to the parameter A, which reflects the relative compatibility between the rubber and rock. Increase of Cerchar’s Abrasivity Index of rocks shows gradual enhancement in wear for M grade rubber in all the load and speed combinations whereas, it fails in SR grade rubber due to its higher strength. The wear of rubber tends to decrease marginally with the surface roughness of rocks at highest normal load and sliding speed in M grade rubber. However, the wear of M and SR grade rubber is influenced by the surface roughness of rocks.

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6

OKUBO, Seisuke, Akinori OTA, Masao AKIYAMA, Katsunori FUKUI, and Yuichi NISHIMATSU. "Abrasivity of Rock and Bit Wear in Drilling." Shigen-to-Sozai 113, no. 5 (1997): 325–32. http://dx.doi.org/10.2473/shigentosozai.113.325.

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7

Mosleh, Mohsen, Wei Hu, and Jamal Rostami. "Introduction to Rock and Soil Abrasivity Index (RSAI)." Wear 432-433 (August 2019): 202953. http://dx.doi.org/10.1016/j.wear.2019.202953.

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8

Mucha, Kamil, and Krzysztof Krauze. "Planning experiment for laboratory tests on rock abrasivity." Mining - Informatics, Automation and Electrical Engineering 3 (535), no. 1 (2018): 17. http://dx.doi.org/10.7494/miag.2018.3.535.17.

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9

Yaralı, O., E. Yaşar, G. Bacak, and P. G. Ranjith. "A study of rock abrasivity and tool wear in Coal Measures Rocks." International Journal of Coal Geology 74, no. 1 (March 2008): 53–66. http://dx.doi.org/10.1016/j.coal.2007.09.007.

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10

Li, Qian, Junping Li, Longchen Duan, and Songcheng Tan. "Prediction of rock abrasivity and hardness from mineral composition." International Journal of Rock Mechanics and Mining Sciences 140 (April 2021): 104658. http://dx.doi.org/10.1016/j.ijrmms.2021.104658.

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Dissertations / Theses on the topic "Rock abrasivity"

1

Ellecosta, Peter [Verfasser], Kurosch [Akademischer Betreuer] Thuro, Michael [Gutachter] Alber, and Kurosch [Gutachter] Thuro. "Determining abrasivity for hard rock TBM tunnelling / Peter Ellecosta ; Gutachter: Michael Alber, Kurosch Thuro ; Betreuer: Kurosch Thuro." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1223616959/34.

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2

Zhang, Guangzhe. "Cerchar abrasivity test – laboratory testing and numerical simulation." 2019. https://tubaf.qucosa.de/id/qucosa%3A74724.

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Abrasivity is a characteristic property of rocks. Rock abrasivity has influence on tool wear, energy consumption and construction time and is therefore an important parameter in rock engineering. Over the years, a number of testing methods have been developed to define and quantify the abrasive potential of rocks. Due to simple design and convenient handling, Cerchar abrasivity test and its index, Cerchar abrasivity index, are most commonly used to assess the rock abrasivity. Besides the abrasivity index, various parameters can be derived from the Cerchar test thanks to the development of a special designed testing device. Diverse parameters like scratching force, applied work and specific energy can be used to estimate the cutting efficiency. Moreover, a new composite parameter named Cerchar abrasion ratio is proposed, which considers both, the wear on the stylus tip and the material removal on the rock surface and can be regarded as an indicator to evaluate the cutting effectivity. Since the development of Cerchar abrasivity test, major attentions are focused on the abrasion of the stylus, but minor attentions are paid to investigate the mechanical behavior of rocks against the action of the stylus during the scratching process. The scratch groove produced on the rock surface is observed under a scanning electron microscope. The Cerchar wear mechanism can be explained as follows: mineral grains are detached from damaged surface by fracturing after plastic deformation on stressed surface. Transition from plastic deformation-induced to cracking-induced wear are related to the rock microstructure. For the Cerchar test, various factors affecting the Cerchar abrasivity index have been studied, which can be divided into testing condition-based and geotechnical-based factors. The influence of some dominant testing condition-based factors including surface condition, testing distance and velocity on the test result is investigated by using the new designed testing device, in which the sliding distance and scratching velocity can be exactly controlled during the test. Results show that the surface condition can affect the result of Cerchar index, especially for hard and inhomogeneous rocks, while the testing distance and velocity have no obvious influence on the Cerchar index. As far as it is known, in rock mechanics, anisotropic features of rocks can affect the experimental results significantly. In the original Cerchar specification, testing procedure for stratified or foliated rocks is not specially discussed. Due to this, the influence of rock anisotropy on the Cerchar abrasivity index is investigated based on two intact metamorphic rocks of slate and gneiss. However, no significant dependency is found. Cerchar scratch test is simulated based on a quasi-homogeneous model made of sandstone with respect to its mineralogical-mechanical properties. The numerical simulation is conducted by using the discrete element method-based particle flow code of PFC3D. As a result, the simulated scratching force shows a good agreement with the experimental result. A gap between numerical and experimental studies can be attributed to the testing condition-based factors, such as rock mineralogy and microstructure, scratching velocity and depth of scratch, tool abrasion and temperature. Based on the calibrated sandstone model, numerical simulations of rock cutting are conducted under different testing conditions. The influence of tool geometry like tip shape, tip angle and tip wear, and cutting parameters including cutting velocity, depth of cut and rake angle on the cutting force and crack pattern is studied.

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3

Perez, Ospina Santiago. "Acoustic analysis of rock cutting process for impregnated diamond drilling." Thesis, 2016. http://hdl.handle.net/2440/113357.

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The rock cutting industry has experienced important changes with the introduction of diamond-based drilling tools in the last few decades. Impregnated diamond (ID) bits are part of that introduction and their main use is to drill hard and abrasive rock formations. ID core drilling has emerged as the most commonly used technology employed in the advanced stages of mineral exploration. Through this technology, existing resources - mineral and energy - are expanded and greenfield exploration is carried out. As near-surface deposits are depleted, there is a global trend towards targeting deeper for exploration. Currently, in near-surface drilling, bit wear condition is determined by the experience of drilling operators –trial and error–. Although it makes the evaluation very subjective and prone to errors, it is an accepted practice. Conversely, in deep drilling, direct assessment of the bit wear condition is difficult and time consuming. Therefore, alternative techniques must be developed in order to evaluate, in real time, the wear condition of the bit and properties of the drilling medium. In this thesis, Acoustic Emission (AE) along with Measuring While Drilling (MWD) parameters are considered as an alternative technique to remotely monitor the ID bit wear condition (sharp and blunt) and rock properties (abrasivity). A series of rigorous and specialized drilling and abrasivity tests are utilised to generate the acoustic signatures with (topologically variant) and without (topologically invariant) changes in the topology of the tool cutting face. Main findings of this work are as follows: firstly, based on the step test results, linear relationships were developed that make it possible to estimate the depth of cut, weight on the bit (WOB) and torque on the bit (TOB) by simply using the time domain parameters of the AE signals. Wear tests also showed that AE amplitudes start to trend down as wear begins to accelerate. Secondly, acceptable pattern recognition rates are obtained for the majority of tool condition monitoring systems developed for predicting sharpness or bluntness of ID bits. In particular, the system composed by AErms [rms subscript] and TOB excels due to the high classification performance rates and the fewer input variables compared to other tool condition monitoring systems. Lastly, AE parameters, such as total number of events and root mean square of AE, in addition to testing parameters are found to accurately predict rock abrasivity measured via Cerchar Abrasivity Index (CAI). The importance of this index lies on: (i) the fact that ID drilling is commonly used in abrasive rock formations, and (ii) the way CAI has been defined (length of wear flat exerted on a steel pin after being scratched on one centimetre of rock surface), which intrinsically relates it to wear condition of the tool. The insights presented in this thesis open up a new promising field of study, impregnated diamond drilling using AE as an indirect technique to evaluate tool condition.
Thesis (Ph.D.) (Research by Publication) -- University of Adelaide, School of Civil, Environmental and Mining Engineering, 2016.

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Books on the topic "Rock abrasivity"

1

Wear of rock cutting tools: Laboratory experiments on the abrasivity of rock. Rotterdam: A.A. Balkema, 1995.

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2

Deketh, H. J. R. Wear of Rock Cutting Tools: Laboratory Experiments on the Abrasivity of Rock. Taylor & Francis Group, 2020.

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3

Deketh, H. J. R. Wear of Rock Cutting Tools: Laboratory Experiments on the Abrasivity of Rock. Taylor & Francis Group, 2020.

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Deketh, H. J. R. Wear of Rock Cutting Tools: Laboratory Experiments on the Abrasivity of Rock. Taylor & Francis Group, 2020.

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Deketh, H. J. R. Wear of Rock Cutting Tools: Laboratory Experiments on the Abrasivity of Rock. Taylor & Francis Group, 2020.

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Book chapters on the topic "Rock abrasivity"

1

Alber, Michael, Olgay Yaralı, Filip Dahl, Amund Bruland, Heiko Käsling, Theodore N. Michalakopoulos, Marilena Cardu, Paul Hagan, Hamit Aydın, and Ahmet Özarslan. "ISRM Suggested Method for Determining the Abrasivity of Rock by the CERCHAR Abrasivity Test." In The ISRM Suggested Methods for Rock Characterization, Testing and Monitoring: 2007-2014, 101–6. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-07713-0_7.

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2

Sirdesai, N. N., A. Aravind, and S. Panchal. "Impact of Rock Abrasivity on TBM Cutter-Discs During Tunnelling in Various Rock Formations." In Advances in Mechanical Engineering, 527–34. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3639-7_63.

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3

"Determining rock abrasivity in the laboratory." In Rock Mechanics in Civil and Environmental Engineering, 445–48. CRC Press, 2010. http://dx.doi.org/10.1201/b10550-100.

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4

"Abrasivity of rocks at depth." In Rock Mechanics in Civil and Environmental Engineering, 441–44. CRC Press, 2010. http://dx.doi.org/10.1201/b10550-99.

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5

González, C., M. Arroyo, and A. Gens. "Abrasivity measures on geotechnical materials of the Barcelona area." In Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, 345–50. CRC Press, 2014. http://dx.doi.org/10.1201/b16955-56.

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6

Thuro, K., J. Singer, H. K√§sling, and M. Bauer. "Determining abrasivity with the LCPC test." In Rock Mechanics: Meeting Society's Challenges and Demands, 827–34. Taylor & Francis, 2007. http://dx.doi.org/10.1201/noe0415444019-c103.

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7

Yarali, O., H. Aydin, H. Duru, and A. Özarslan. "Effect of scratch length on the Cerchar abrasivity index." In Rock Mechanics for Resources, Energy and Environment, 369–75. CRC Press, 2013. http://dx.doi.org/10.1201/b15683-62.

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8

Jiang, Hua, Yusheng Jiang, and Jinxun Zhang. "Study on abrasivity characteristics of surrounding rock in long inclined-shaft of coal mine by TBM techniques." In Progress in Mine Safety Science and Engineering II, 1067–71. CRC Press, 2014. http://dx.doi.org/10.1201/b16606-201.

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Conference papers on the topic "Rock abrasivity"

1

Cheng, Jinguo, Hua Jiang, Yusheng Jiang, and Jingling Zhang. "Research on surrounding rock abrasivity and its influence factors in TBM tunnelling inclined shaft project." In 2020 7th International Conference on Information Science and Control Engineering (ICISCE). IEEE, 2020. http://dx.doi.org/10.1109/icisce50968.2020.00421.

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