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Journal articles on the topic 'Rock abrasivity'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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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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4

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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11

Abu Bakar, M. Z., Y. Majeed, and J. Rostami. "Effects of rock water content on CERCHAR Abrasivity Index." Wear 368-369 (December 2016): 132–45. http://dx.doi.org/10.1016/j.wear.2016.09.007.

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12

Hamzaban, Mohammad-Taghi, Hossein Memarian, Jamal Rostami, and Hamidreza Ghasemi-Monfared. "Study of rock–pin interaction in cerchar abrasivity test." International Journal of Rock Mechanics and Mining Sciences 72 (December 2014): 100–108. http://dx.doi.org/10.1016/j.ijrmms.2014.09.007.

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13

Taha, Hairin, Nurul Atiqah Dzulkifli, Rohayu Che Omar, Ratih Fitria Putri, Rasyikin Roslan, and Intan Nor Zuliana Baharuddin. "Characterization of carbonate rocks using seismic wave for tunnel design stability." E3S Web of Conferences 325 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202132503002.

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The design and construction of a tunnel depends on the mechanical properties of the rock mass around the tunnel. Seismic method can be used to characterize the dynamic properties of rocks. The technique is mostly conducted in geophysical surveys and geotechnical investigations. The method utilizes reflected sound waves that can be used to describe the dynamic properties of rocks. Physical properties of carbonate rocks such as water content, density, hardness, permeability, porosity, wave velocity and abrasivity can be assessed and estimated using P-wave velocity. One of the important characteristics in rock is its ability to remain stable. In this research, seismic refraction survey was applied to measure the strength of carbonate rocks for tunnel stability design. The findings revealed that the regression between the primary velocity and the uniaxial compressive strength R2 was 0.8592, indicating that the rock was firm and solid. Observation by physical visual test showed that the rock samples with yellowish-grey and light grey colours were categorized in the weathering grade II and III, respectively. The results have concluded that the rocks in the proposed area met the full requirements for tunnelling construction.

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14

Okubo, S., K. Fukui, and Y. Nishimatsu. "Estimating Abrasivity of Rock by Laboratory and In Situ Tests." Rock Mechanics and Rock Engineering 44, no. 2 (August 12, 2010): 231–44. http://dx.doi.org/10.1007/s00603-010-0113-6.

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15

Adebayo, B., and B. Adetula. "Evaluation of physical and mechanical properties of rock for drilling condition classification." World Journal of Engineering 10, no. 4 (August 21, 2013): 359–66. http://dx.doi.org/10.1260/1708-5284.10.4.359.

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This work deals with the investigation of physical and mechanical properties of selected rocks for condition of drilling categorization. Rock samples collected from five drilling locations were tested in the laboratory for uniaxial compressive strength, tensile strength, and Drilling Rate Index (DRI) using 1,100 kN compression machine, point load tester and miniature drill. Similarly, hardness, brittleness, Rock Abrasivity Index (RAI), penetration rate and bit wear rate were determined. The results showed that uniaxial compressive strength, tensile strength and Drilling Rate Index varied from 47.78 - 111.11 MPa, 8.09 - 19.44 MPa, and 20 - 52 respectively. The Nast point system chart was used to classify the rocks into drilling conditions. The drilling classification shows that the drilling condition of the rocks varied from slow to fast. The drillability characteristics of the rocks vary from extremely low to medium as specified by the Drilling rate Index (DRI). It was concluded that uniaxial compressive strength, texture and grain size, drilling rate index and Equivalent Quartz Content (EQC) are important parameters affecting drilling condition of the rocks.

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16

Majeed, Y., and M. Z. Abu Bakar. "A study to correlate LCPC rock abrasivity test results with petrographic and geomechanical rock properties." Quarterly Journal of Engineering Geology and Hydrogeology 51, no. 3 (May 22, 2018): 365–78. http://dx.doi.org/10.1144/qjegh2017-112.

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17

Verhoef, Peter N. W. "Abrasivity of Hawkesbury Sandstone (Sydney, Australia) in relation to rock dredging." Quarterly Journal of Engineering Geology and Hydrogeology 26, no. 1 (February 1993): 5–17. http://dx.doi.org/10.1144/gsl.qjeg.1993.026.01.02.

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18

Jonczy, Iwona, and Kamil Mucha. "Relationships between the Petrographic and Abrasive Properties of Sandstones in the Aspect of Their Cutting." Energies 15, no. 7 (April 6, 2022): 2692. http://dx.doi.org/10.3390/en15072692.

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The research described in this article was carried out on samples of sandstone obtained from the underground excavations of four hard coal mines that operate in the region of Poland with the highest energy resources, i.e., Upper Silesia. The majority of underground tunnel excavations are mainly drilled using roadheaders, the organs of which are equipped with conical picks. The selection of pick type is usually based on rock compressive strength. However, sandstones often cause more problems during cutting compared to other waste rocks because of their variety. This article’s primary purpose is to emphasize the importance of researching various properties of waste rock in addition to uniaxial compression strength, which is crucial in the selection of both the appropriate cutting method and appropriate cutting tools. Accordingly, relations between mineralogical, petrographic, physical and mechanical properties were examined in this study, with special attention paid to the abrasive properties that comprise rock abrasivity. Sandstones from the regions of Upper Silesia are characterized by a heterogeneity of mineralogical and petrographic features that strongly affect the physical and mechanical properties of these rocks, especially their abrasive properties. The determined correlations can aid understanding of the behavior of rocks during their mechanical cutting and facilitate the selection of appropriate cutting tools.

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19

González, Claudia, Marcos Arroyo, and Antonio Gens. "Wear and abrasivity: observations from EPB drives in mixed soft - rock sections." Geomechanics and Tunnelling 8, no. 3 (June 2015): 258–64. http://dx.doi.org/10.1002/geot.201500007.

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20

Teymen, Ahmet. "The usability of Cerchar abrasivity index for the estimation of mechanical rock properties." International Journal of Rock Mechanics and Mining Sciences 128 (April 2020): 104258. http://dx.doi.org/10.1016/j.ijrmms.2020.104258.

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21

Majeed, Y., M. Z. Abu Bakar, and I. A. Butt. "Abrasivity evaluation for wear prediction of button drill bits using geotechnical rock properties." Bulletin of Engineering Geology and the Environment 79, no. 2 (August 9, 2019): 767–87. http://dx.doi.org/10.1007/s10064-019-01587-y.

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22

Bakar, M. Z. Abu, Z. Zafar, and Y. Majeed. "Abrasiveness evaluation of selected river gravels of Pakistan using LCPC rock abrasivity test." Bulletin of Engineering Geology and the Environment 79, no. 5 (January 14, 2020): 2561–77. http://dx.doi.org/10.1007/s10064-019-01719-4.

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23

Panthi, Krishna Kanta, and Jhonny Encalada. "Evaluation on the TBM Performance at a Hydropower Project in Ecuador." Hydro Nepal: Journal of Water, Energy and Environment 24 (April 10, 2019): 10–16. http://dx.doi.org/10.3126/hn.v24i0.23575.

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The aim of this manuscript is to discuss the Tunnel Boring Machine (TBM) performance along the recently constructed headrace tunnel of Minas-San Francisco Hydropower Project in Ecuador. Firstly, the manuscript briefly describes the importance of TBM tunneling and about the Minas-San HPP. Further, discussions are made on the engineering geological conditions along the headrace tunnel. Detailed evaluations are made on the performance of TBM tunneling considering influence of rock mass quality on the TBM penetration rate. The manuscript emphasizes that the knowledge of the rock mass quality parameters and cutter technology available at present are among the key factors that influence the estimation of the net penetration rate of the TBM. It has been demonstrated that the hard to very hard rock masses of high abrasivity that were encountered along the headrace tunnel alignment caused very low penetration giving slow progress, which was not predicted during planning phase design. The authors investigated a fairly good link between TBM penetration and the mechanical strength of the rock mass.

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24

Sánchez-Delgado, N., L. Calleja, A. Rodríguez-Rey, A. Setién, and V. G. Ruiz de Argandoña. "Revisión crítica de los ensayos de abrasividad en las rocas y de la influencia de las características petrográficas Critical review of abrasivity tests in rocks and the influence of the petrographic features." Trabajos de Geología 36, no. 36 (September 12, 2018): 347. http://dx.doi.org/10.17811/tdg.36.2016.347-366.

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Resumen: La abrasividad de las rocas tiene gran influencia en algunas de sus aplicaciones, como en los sectores de la piedra natural y en el de ingeniería y obra civil. Para su cuantificación existen más de 15 métodos de ensayo. En este trabajo se hace una revisión de estos métodos clasificándolos en dos grandes grupos: en el caso de la piedra natural se considera el desgaste de los materiales rocosos en contacto con un útil de desgaste, mientras que, en obra civil, por el contrario, se presta atención al desgaste que la roca provoca en los útiles de corte o perforación. Por otra parte, se consideran también aquellos métodos en los que la abrasividad de las rocas se define en función de la variación del valor de alguna de sus propiedades.Palabras clave: Abrasividad, metodos de ensayo, rocas, propiedades fisicas, petrografia.Abstract: The abrasiveness of the rocks has a great influence in some of their applications, such as in the natural stone and in the civil engineering sectors. There are more than 15 test methods for its quantification. This work summarizes these methods and their classification into two large groups: in the case of natural stones the wear of the rock materials when in contact with a wear tool is taken into account; on the other hand, in civil engineering attention is paid to the wear that the rock causes in the cutting or drilling tools. In addition, those methods, in which the abrasiveness of rocks is defined according to the variation of the value of some of its properties, are also considered.Keywords: Abrasivity, testing methods, rocks, physical properties, petrography.

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25

Zhang, Guangzhe, and Heinz Konietzky. "Cerchar Abrasion Ratio (CAR) as a New Indicator for Assessing Rock Abrasivity, Rock–Stylus Interaction and Cutting Efficiency." Rock Mechanics and Rock Engineering 53, no. 7 (April 11, 2020): 3363–71. http://dx.doi.org/10.1007/s00603-020-02112-4.

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26

Macias, F. J., F. Dahl, and A. Bruland. "New Rock Abrasivity Test Method for Tool Life Assessments on Hard Rock Tunnel Boring: The Rolling Indentation Abrasion Test (RIAT)." Rock Mechanics and Rock Engineering 49, no. 5 (October 6, 2015): 1679–93. http://dx.doi.org/10.1007/s00603-015-0854-3.

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27

Mosleh, Mohsen, Wei Hu, and Jamal Rostami. "Corrigendum to “Introduction to Rock and Soil Abrasivity Index (RSAI)” [Wear 432–433 (2019), 202953]." Wear 440-441 (December 2019): 203080. http://dx.doi.org/10.1016/j.wear.2019.203080.

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28

Ko, Tae Young, and Sean Seungwon Lee. "Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite." Applied Sciences 10, no. 9 (May 6, 2020): 3231. http://dx.doi.org/10.3390/app10093231.

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The abrasiveness of rocks significantly influences the wear endured by excavation tools in tunnel boring machines (TBMs). In slurry shield TBMs, wear occurs not only in excavation tools but also in discharge pipes and pumps of slurry transport systems. To explore this phenomenon, this study investigated the effect of rock abrasiveness on the wear of both disc cutters and slurry discharge pipes in slurry shield TBMs. The radial wear of disc cutters and the thickness of slurry discharge pipes were measured and monitored at a TBM site in Singapore. The relationship between the weathering grade of Bukit Timah granite and the wear coefficient of disc cutters was analysed, and a correlation between the Cerchar Abrasivity Index values and the wear coefficient of 19 inch disc cutters was suggested. Additionally, the average wear rates of slurry discharge pipes used for Bukit Timah granite were determined based on the pipe thickness measurements. The wear rates of weathering grades G(I) to G(IV) of Bukit Timah granite were observed to be highly similar to each other, whereas the wear rates of G(V) grade and mixed ground were 1.55 times higher than those of the G(I) to G(IV) grades. The correlation between the slurry discharge velocity and the wear rate in slurry discharge pipes was thus derived. The accurate assessment of the effect of rock abrasiveness on both the wear of disc cutters and the wear rate in slurry discharge pipes, investigated in this paper, will highlight the need for efficient maintenance of the excavation tools in TBMs and encourage the development of various equipment wear prevention measures in order to minimize overall construction costs and time.

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29

Abu Bakar, M. Z., Y. Majeed, M. A. Rashid, and F. Ahmed. "Wear mechanisms of LCPC rock abrasivity test impellers of materials equivalent to TBM cutter head face tools." Tunnelling and Underground Space Technology 116 (October 2021): 104122. http://dx.doi.org/10.1016/j.tust.2021.104122.

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30

Zhang, Guangzhe, Heinz Konietzky, and Thomas Frühwirt. "Investigation of scratching specific energy in the Cerchar abrasivity test and its application for evaluating rock-tool interaction and efficiency of rock cutting." Wear 448-449 (May 2020): 203218. http://dx.doi.org/10.1016/j.wear.2020.203218.

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31

Di Giovanni, Alfio, Carmine Todaro, Marilena Cardu, Stefano Bianchini, and Brunello Forfori. "Laboratory Test Campaign Aimed at the Analysis of an Uncommon Wear Phenomenon in a Marble Quarry." Applied Sciences 12, no. 4 (February 21, 2022): 2264. http://dx.doi.org/10.3390/app12042264.

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The use of ornamental stones has a historical value that makes them strategically precious in Italy; marble can offer high performance in architectural applications, even though the variability of the rock mass requires detailed studies to optimize the exploitation techniques and reduce waste. Italy is world famous for its marble, which is extracted mainly through chainsaw cutting machines, which are currently used intensively due to their high-safety working conditions compared to alternative techniques and for their great versatility, especially in underground applications. Although this cutting technique is well-rooted, an uncommon problem of tool wear was found in the quarry under study, which strongly affected productivity. A series of laboratory test were carried out to estimate the wear potential of the rock and the suitability of the tools. The Cerchar abrasivity test highlighted a mean wear potential for the marble of 2.77, while microhardness outcomes pointed out the presence of quartz veins in the tested material (values over 10,000 MPa). Finally, additives typically used in the conditioning process of EPB machines in tunneling were tested with the purpose of reducing the extent of wear. A reduction of about 50% in the wear (in terms of weight lost) was obtained for a moisture content of 9%.

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32

Zhang, Mengqi, Xianguo Yan, and Guoqiang Qin. "A new method for roadheader pick arrangement based on meshing pick spatial position and rock cutting verification." PLOS ONE 16, no. 11 (November 17, 2021): e0260183. http://dx.doi.org/10.1371/journal.pone.0260183.

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This paper proposes a cutting head optimization method based on meshing the spatial position of the picks. According to the expanded shape of the spatial mesh composed of four adjacent picks on the plane, a standard mesh shape analysis method can be established with mesh skewness, mesh symmetry, and mesh area ratio as the indicators. The traversal algorithm is used to calculate the theoretical meshing rate, pick rotation coefficient, and the variation of cutting load for the longitudinal cutting head with 2, 3, and 4 helices. The results show that the 3-helix longitudinal cutting head has better performance. By using the traversal result with maximum theoretical meshing rate as the design parameter, the longitudinal cutting head CH51 with 51 picks was designed and analyzed. The prediction model of pick consumption is established based on cutting speed, direct rock cutting volume of each pick, pick rotation coefficient, uniaxial compressive strength, and CERCHAR abrasivity index. And the rock with normal distribution characteristics of Uniaxial Compressive Strength is used for the specific energy calculating. The artificial rock wall cutting test results show that the reduction in height loss suppresses the increase in pick equivalent loss caused by the increase in mass loss, and the pick consumption in this test is only 0.037–0.054 picks/m3. In addition, the correlation between the actual pick consumption and the prediction model, and the correlation between the actual cutting specific energy and the theoretical calculation value are also analyzed. The research results show that the pick arrangement design method based on meshing pick tip spatial position can effectively reduce pick consumption and improve the rock cutting performance.

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33

Alber, Michael. "Stress dependency of the Cerchar abrasivity index (CAI) and its effects on wear of selected rock cutting tools." Tunnelling and Underground Space Technology 23, no. 4 (July 2008): 351–59. http://dx.doi.org/10.1016/j.tust.2007.05.008.

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34

Kivade, S. B., Ch S. N. Murthy, and H. Vardhan. "Investigation of Noise Level and Penetration Rate of Pneumatic Drill vis-à-vis Rock Compressive Strength and Abrasivity." Journal of The Institution of Engineers (India): Series D 95, no. 2 (August 19, 2014): 103–14. http://dx.doi.org/10.1007/s40033-014-0048-2.

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35

Hamzaban, Mohammad-Taghi, Hossein Memarian, and Jamal Rostami. "Continuous Monitoring of Pin Tip Wear and Penetration into Rock Surface Using a New Cerchar Abrasivity Testing Device." Rock Mechanics and Rock Engineering 47, no. 2 (March 15, 2013): 689–701. http://dx.doi.org/10.1007/s00603-013-0397-4.

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36

Zhang, She-Rong, Lei She, Chao Wang, Yu-Jie Wang, Rui-Lang Cao, Yan-Long Li, and Ke-Lei Cao. "Investigation on the relationship among the Cerchar abrasivity index, drilling parameters and physical and mechanical properties of the rock." Tunnelling and Underground Space Technology 112 (June 2021): 103907. http://dx.doi.org/10.1016/j.tust.2021.103907.

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37

Yılmaz, Nurdan Güneş. "Abrasivity Assessment of Granitic Building Stones in Relation to Diamond Tool Wear Rate Using Mineralogy-Based Rock Hardness Indexes." Rock Mechanics and Rock Engineering 44, no. 6 (July 12, 2011): 725–33. http://dx.doi.org/10.1007/s00603-011-0166-1.

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38

Adebayo, B., and V. O. Akeju. "Evaluation of Tri-Cone Bit Performance on Limestone Formation." Advanced Materials Research 367 (October 2011): 555–60. http://dx.doi.org/10.4028/www.scientific.net/amr.367.555.

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This study examines the characteristics of limestone formation as well as the performance of different tri-cone bits in limestone in Ewekoro. Rock samples were collected from different layers of limestone encountered in the quarry during drilling operation. These samples were tested in the laboratory for uniaxial compressive strength and the tensile strength. Also, the chemical compositions of the samples were determined using the X-Ray Fluorescence (XRF) Spectrometer and the results were used in the determination of the Equivalent Quartz Content (EQC). The length of the insert buttons on the surface of the drill bits were measured using digital vernier calliper at regular intervals. In addition, the tooth and bearing wear rates as well as the penetration rate were determined on the field. The results of the uniaxial compressive strength varied from 86.5MPa (medium strength) to 112 MPa (high strength). The Equivalent Quartz Content (EQC) of the rock samples varied from 17.37% to 36.676% while the Rock Abrasivity Index (RAI) varied from 15.03 to 43.317. The results of the drilling variables showed that higher wear rate was experienced when milled tooth tri-cone bit was used for drilling than using insert tri-cone bit for drilling limestone formation, hence the tri-cone bits performed optimally well in all the formations except in glauconite (GLAB) where its performance was low. However, the economic analysis indicated that the insert tri-cone bit drilling cost per metre varied from N660/m to N673/m while the milled tooth tri-cone bit drilling cost per metre varied from N684/m to N710/m. This will act as a data base for selection of drill bits and drilling equipment in limestone quarries.

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39

Rasti, Arezou, Hamid Ranjkesh Adarmanabadi, and Mohammad Reza Sahlabadi. "EFFECTS OF CONTROLLABLE AND UNCONTROLLABLE PARAMETERS ON DIAMOND WIRE CUTTING PERFORMANCE USING STATISTICAL ANALYSIS: A CASE STUDY." Rudarsko-geološko-naftni zbornik 36, no. 4 (2021): 21–32. http://dx.doi.org/10.17794/rgn.2021.4.3.

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Nowadays, most mining and quarrying industries utilize a diamond wire saw machine for bench cutting operations. This method uses a metal wire or cable assembled by diamond beads to cut the hard stone into large blocks. Many parameters classified into controllable and uncontrollable parameters affect the performance of the diamond wire saw cutting method. The uncontrollable parameters are related to rock engineering properties, and controllable parameters are related to operational aspects and machine performance. The diamond wire sawing process’s production rate is one of the most critical parameters influencing the design optimization and quarrying cost estimation. The cutting rate and wear rate of diamond beads are the most important factors to evaluate quarries’ production performance. This study aims to determine the effects of different controllable and uncontrollable parameters on different quarries’ production rates. Rock engineering properties like strength, hardness, and abrasivity, and operational aspects, such as cutting angle and drive wheel diameters, are considered as the main factors affecting the production performance of the diamond wire saw method. To discover the influence of these parameters, a detailed investigation in ten quarry operations was carried out. The relation between cutting rate and diamond bead wear with different parameters is estimated. It was observed that different controllable and uncontrollable parameters could increase or decrease the cutting rate and diamond bead wearing. Furthermore, using simple and multiple regression analysis, performance prediction of the cutting rate and wearing of diamond beads was developed, and the best equations were proposed.

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40

Alber, Michael, and Ralf J. Plinninger. "Abrasivitätsuntersuchung von Boden und Fels im Kontext der neuen VOB/C/Assessment of rock and soil abrasivity relating to the new VOB/C standard." Bauingenieur 91, no. 05 (2016): 200–207. http://dx.doi.org/10.37544/0005-6650-2016-05-60.

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Mit Erscheinen des Ergänzungsbands 2015 zur VOB 2012 ergeben sich für die Baugrunderkundung im Erd-, Grund-, Tief- und Spezialtiefbau umfassende Änderungen. Dies betrifft nicht nur das Konzept der geotechnischen „Homogenbereiche“, sondern auch die hierfür zu ermittelnden Kennwerte. Im Bereich der Abrasivitätsuntersuchung von Boden und Fels werden mit Erscheinen des Ergänzungsbands in Deutschland erstmals „Standards“ gesetzt. Der für Fels referenzierte „CERCHAR-Versuch“ stellt dabei ein aussagekräftiges, reproduzierbares und wirtschaftliches Verfahren dar, mit dem national und international umfangreiche Erfahrungen vorliegen. Eine sinnvolle Weiterentwicklung der VOB/C könnte dennoch in der Einbeziehung mineralogisch-petrographischer Ansätze für die Untersuchung von Fels bestehen. Im Gegensatz dazu stellt der für Boden referenzierte „LCPC-Versuch“ ein Versuchsverfahren dar, das durch die Verwendung stark vereinfachter Modellkörper und stark vereinfachter Versuchsrahmenbedingungen mutmaßlich zahlreiche neue, versuchstechnische Probleme implizieren wird. Böden in Ton-, Schluff- und Sandfraktion können bei normgemäßer Anwendung des Verfahrens nicht untersucht werden. Ebenso werden durch Probenahme und Probenvorbereitung eine Vielzahl verschleißrelevanter Bodenparameter verändert. Diese Aspekte lassen es zumindest fraglich erscheinen, ob das Ziel einer auch bauvertraglich belastbaren Bewertung der Abrasivität von Böden mit dieser Versuchsvorgabe erreicht wurde. Auch im Bereich der Lockergesteine könnte daher eine sinnvolle Weiterentwicklung in der Berücksichtigung geologisch-geotechnischer Prognoseindices bestehen, die auf herkömmlichen, „intrinsischen“, bodenmechanischen Kennwerten beruhen.

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Averin, E. A., A. B. Zhabin, A. V. Polyakov, Y. N. Linnik, and V. Y. Linnik. "Comparison of Russian Index of Rocks Abrasivity with CAI." IOP Conference Series: Earth and Environmental Science 666, no. 3 (March 1, 2021): 032079. http://dx.doi.org/10.1088/1755-1315/666/3/032079.

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Oparin, V. N., and A. S. Tanaino. "Assessment of abrasivity by physico-mechanical properties of rocks." Journal of Mining Science 45, no. 3 (May 2009): 240–49. http://dx.doi.org/10.1007/s10913-009-0031-8.

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43

Er, Selman, and Atiye Tuğrul. "Correlation of physico-mechanical properties of granitic rocks with Cerchar Abrasivity Index in Turkey." Measurement 91 (September 2016): 114–23. http://dx.doi.org/10.1016/j.measurement.2016.05.034.

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44

Kahraman, S., M. Fener, H. Käsling, and K. Thuro. "The influences of textural parameters of grains on the LCPC abrasivity of coarse-grained igneous rocks." Tunnelling and Underground Space Technology 58 (September 2016): 216–23. http://dx.doi.org/10.1016/j.tust.2016.05.011.

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45

Er, Selman, and Atiye Tuğrul. "Estimation of Cerchar abrasivity index of granitic rocks in Turkey by geological properties using regression analysis." Bulletin of Engineering Geology and the Environment 75, no. 3 (February 3, 2016): 1325–39. http://dx.doi.org/10.1007/s10064-016-0853-y.

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Garzón-Roca, Julio, F. Javier Torrijo, Olegario Alonso-Pandavenes, and Santiago Alija. "Cerchar Abrasivity Index Estimation of Andesitic Rocks in Ecuador from Petrographical Properties Using Artificial Neural Networks." International Journal of Geomechanics 20, no. 5 (May 2020): 04020036. http://dx.doi.org/10.1061/(asce)gm.1943-5622.0001632.

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Figarska-Warchoł, Beata, and Marek Rembiś. "Lamination and Its Impact on the Physical and Mechanical Properties of the Permian and Triassic Terrestrial Sandstones." Resources 10, no. 5 (May 1, 2021): 42. http://dx.doi.org/10.3390/resources10050042.

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The sandstones with a laminated structure are common building materials. Lamination is macroscopically expressed as colour and grain size variations observed both in the deposit and within individual beds; therefore, the properties of such sandstones are diverse depending on the spatial distribution of the binding mass and framework components. For the terrestrial sandstones of different genesis, four types of laminae have been distinguished based on petrographic studies. They have a siliceous binder or a mixed ferruginous–siliceous–argillaceous binder with different proportions of these components. In laminae of types I–III, the grain framework is built mainly of quartz grains, and in type IV, it is accompanied by numerous lithoclasts and feldspars. Knoop hardness and CERCHAR abrasivity were tested in each lamina variety, and the results were correlated with the equivalent quartz content and the longitudinal ultrasonic wave velocity measured perpendicular and parallel to the lamination. The proposed research methodology was not used in previous studies on terrestrial laminated sandstones. The results explain a strong dependence between mineral composition, structure of laminae, and technical parameters of rocks. The knowledge of this relationship facilitates the selection of rocks that meet the relevant technical requirements and helps to optimally manage the resources of sandstone deposits.

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Torrijo, F. Javier, Julio Garzón-Roca, Julio Company, and Guillermo Cobos. "Estimation of Cerchar abrasivity index of andesitic rocks in Ecuador from chemical compounds and petrographical properties using regression analyses." Bulletin of Engineering Geology and the Environment 78, no. 4 (May 22, 2018): 2331–44. http://dx.doi.org/10.1007/s10064-018-1306-6.

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Perez, S., M. Karakus, and E. Sepulveda. "A preliminary study on the role of acoustic emission on inferring Cerchar abrasivity index of rocks using artificial neural network." Wear 344-345 (December 2015): 1–8. http://dx.doi.org/10.1016/j.wear.2015.10.006.

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Bulut, Berrak, Oguzhan Gunduz, Murat Baydogan, and Eyup Sabri Kayali. "Determination of matrix composition for diamond cutting tools according to the hardness and abrasivity properties of rocks to be cut." International Journal of Refractory Metals and Hard Materials 95 (February 2021): 105466. http://dx.doi.org/10.1016/j.ijrmhm.2020.105466.

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