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Journal articles on the topic 'Crushed rock'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Quartey, Gideon, Anthony Simons, and Mutalubi Aremu Akintunde. "The Impact of Passive Displacement Fixed Jaw Design on Liner Wear in Single Toggle Jaw Crushers." European Journal of Applied Science, Engineering and Technology 3, no. 3 (2025): 83–91. https://doi.org/10.59324/ejaset.2025.3(3).08.

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Single toggle jaw crushers are widely used in mining and aggregate industries, but they suffer from significant liner wear, leading to increased maintenance costs and downtime. This research investigates the impact of a novel single toggle jaw crusher design with a passive displacement fixed jaw on liner wear. The investigation was done by carrying out a comparative analysis between the conventional jaw crusher design and the new jaw crusher design. During the evaluation of the conventional and new crusher designs, the liners were initially weighed with an electronic scale of 20 g sensitivity,

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2

Quartey, Gideon, Anthony Simons, and Mutalubi Aremu Akintunde. "The Impact of Passive Displacement Fixed Jaw Design on Liner Wear in Single Toggle Jaw Crushers." European Journal of Applied Science, Engineering and Technology 3, no. 3 (2025): 83–91. https://doi.org/10.59324/ejaset.2025.3(3).08.

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Single toggle jaw crushers are widely used in mining and aggregate industries, but they suffer from significant liner wear, leading to increased maintenance costs and downtime. This research investigates the impact of a novel single toggle jaw crusher design with a passive displacement fixed jaw on liner wear. The investigation was done by carrying out a comparative analysis between the conventional jaw crusher design and the new jaw crusher design. During the evaluation of the conventional and new crusher designs, the liners were initially weighed with an electronic scale of 20 g sensitivity,

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3

Malanchuk, Z. R., A. O. Khrystyuk, S. Ye Stets, V. V. Semeniuk, and L. O. Malanchuk. "Substantiation of research results on energy efficiency of basalt crushing." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (December 25, 2022): 41–46. http://dx.doi.org/10.33271/nvngu/2022-6/041.

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Purpose. To experimentally determine the main design and operational parameters of the influence of rock mass properties on the Roller Crusher performance when processing basalt rock mass. Methodology. The crushing and grinding of basalts are studied by the methods of mathematical statistics in order to identify the results obtained and determine the dependences of technological parameters on the mechanical impact factors. Experimental studies are carried out on the example of basalts from the Rafalivskyi quarry in the Rivne region. Findings. It has been revealed that the elemental composition

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4

Kipko, Oleksandr, and Vitalii Hnatiuk. "DEFORMATION FEATURES OF EMBEDDED MATERIALS UNDER COMPRESSION CONDITIONS." JOURNAL of Donetsk mining institute 53, no. 2 (2023): 41–52. http://dx.doi.org/10.31474/1999-981x-2023-2-41-52.

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Purpose. The purpose of the article is t o study the deformation characteristics of the backfill materials made of crushed rock of different granulometric composition under compression conditions to assess the stability of the side rocks in a coal massif with preparatory workings when selecting the parameters of protective structures. Methods. Compression tests were carried out in the laboratory to model the behaviour of crushed rock fill materials under load. Cylindrical specimens were subjected to axial static compression without the possibility of lateral expansion. The results. It has been

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5

Bessarab, Iryna, Oleksandr Demchenko, Olha Pidhurna, and Serhii Podkopaiev. "ASSESSMENT OF THE BEARING CAPACITY OF PROTECTIVE STRUCTURES MADE OF ROCKING SHAPES FOR PREPARATORY MINING WORKS." SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”, no. 1(31)-2(32) (2024): 29–38. https://doi.org/10.31474/2073-9575-2024-1(31)-2(32)-29-38.

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Purpose.To evaluate the load-bearing capacity of protective structures made of crushed stone to ensure the stability of the preparatory production of the excavation site of the coal mine. Methods. Modeling of the deformation properties of protective structures made of crushed rock was performed on experimental samples during their static loading under the condition of uniaxial compression with the possibility of lateral expansion of the original material or its compression compression. Crushed rock of different granulometric composition was used as the starting material. Results. The condition

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6

Yang, Li Jun, Bin Xiang Sun, Wei Wang, and Qi Liu. "Effect of Crushed Rock Layer Width on Natural Convection Cooling of Highway Embankment in Permafrost Regions." Applied Mechanics and Materials 204-208 (October 2012): 1638–43. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.1638.

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For the construction of the proposed Qinghai-Tibet Express Highway in permafrost regions, it will be necessary to use the new technique of cooling the ground temperature by the coarsely crushed rock layer with a low fines content. The heat convection governing equations based on airflow function in variable permeability porous crushed rock layer are derived. Comparison of the cooling capability of winter-time natural convection in the crushed rock highway embankments with various widths of crushed rock layer and an air-permeable side slope surface were studied using a finite element method. Th

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7

Qin, Xuan, Zhiguo Cao, Lichang Wei, Peng Li, and Hao Sun. "Spatial Structure Characteristics of Underground Reservoir Water Storage Space in Coal Mines Considering Shape Characteristics of Crushed Rock." Processes 11, no. 9 (2023): 2611. http://dx.doi.org/10.3390/pr11092611.

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In order to investigate the impact of a crushed rock shape on the storage coefficient of underground reservoirs in coal mines, statistical analysis of the shape characteristics of crushed rocks was conducted, which was followed by numerical packing tests using the rigid block model. These tests aimed to investigate the spatial structure characteristics of underground reservoir water storage space in coal mines under the influence of different shapes of crushed rock. The results demonstrated the following: (1) Crushed rock exhibits a lognormal distribution in its shape characteristic parameters

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8

Yang, Li Jun, Wen Hui Bai, Bin Xiang Sun, Shuang Jie Wang, and Jin Zhao Zhang. "Effect of Vibrating Load on Grain Size Distribution of Crushed Rock Layer." Advanced Materials Research 168-170 (December 2010): 663–68. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.663.

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For the construction of the proposed Qinghai-Tibet Express Highway in warm and ice-rich permafrost regions, it will be necessary to utilize the new technique of cooling the ground temperature by the coarsely crushed rock layer with a low fines content, instead of the traditional measures taken to increase simply thermal resistances, so as to protect from damage to highway embankment due to thaw settlement. The vibrating loads such as wheel load and tamping load may cause the breakage and abrasion of the matrix grains in the coarsely crushed rock layer. This results in decreasing of grain size

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9

Volkov, Serhii, and Oleksii Kaiun. "STUDY OF DEFORMATION CHARACTERISTICS OF PROTECTIVE STRUCTURES OF DEVELOPMENT WORKINGS FOR PREDICTING THE STABILITY OF SIDE ROCKS IN A COAL-ROCK MASSIF." Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, no. 1-2 (2022): 30–44. http://dx.doi.org/10.31474/2415-7902-2022-1(8)-2(9)-30-44.

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Purpose. To study deformation characteristics of embedded massifs from crushed rock under different compression conditions to ensure the stability of side rocks in the coal massif. Methodology. To achieve the goal, the laboratory studies of deformation characteristics of embedded massifs during compression of crushed rock and during its uniaxial compression, with the possibility of lateral expansion of the source material, have been performed. Results. As a result of the performed experimental studies, the characteristic features of the deformation of embedded massifs made of crushed rock have

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10

Song, Shuang, Shugang Li, Tianjun Zhang, Hongyu Pan, Nan Liu, and Lei Zhang. "Study on the distribution pattern of particle re-crushing in the coal and rock mass crushing process under pressure." PLOS ONE 17, no. 1 (2022): e0262235. http://dx.doi.org/10.1371/journal.pone.0262235.

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In order to investigate the compaction and re-crushing characteristics of crushed coal gangue with different gradation, the compaction fractal test was carried out for crushed coal gangue with different Talbol power index n. The compaction deformation parameters such as displacement, stress-strain were analyzed according to the test results. And according to the test results, the compaction deformation relationship of the lateral limit crushed coal rock body considering the gradation is obtained. The test results show that: the crushing of coal rock particles exists in almost the whole compact

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11

Romanova, Victoria S., and Viktor V. Gabov. "The Effect of Combined Loads on the Destruction of Rocks with a Granular Structure." Materials Science Forum 1022 (February 2021): 1–6. http://dx.doi.org/10.4028/www.scientific.net/msf.1022.1.

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The article addresses the features of rock disintegration based on the principles of selective and preferential destruction in high-frequency cone vibratory crushers with a free-turning inner cone. Based on the common method for determining the ultimate strength of rocks, a method for investigating the process of ore destruction under repeated and versatile influences has been proposed depending on the structure of the crushed material. The results of an experimental research of the destruction of rock samples on a press with limited force are given.

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12

Sun, Bin Xiang, Li Jun Yang, Wen Hui Bai, Jin Zhao Zhang, and Shuang Jie Wang. "Laboratory Experiment on Porosity Variation of Crushed Rock Layer under Vibrating Load." Applied Mechanics and Materials 29-32 (August 2010): 1866–71. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.1866.

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Under the background of the express-reconstruction of the Qinghai-Tibet Highway being proposed, it will be necessary to employ the special technique of cooling the ground temperature by the crushed rock embankment in order to protect from damage to highway embankment due to thaw settlement. Under vibrating load, the porosity variation of crushed rock layer may weaken the cooling effect of buoyancy-driven natural convection of the pore air in the crushed rock layer of the highway embankment, thus resulting in instability and failure of the road embankment structure. Under these conditions, the

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13

Kang, Seong-Seung, Atsuo Hirata, Bo-An Jang, Yong-Seok Seo, and Daehyeon Kim. "Interaction between an Eco-Spiral Bolt and Crushed Rock in a Borehole Evaluated by Pull-Out Testing." Advances in Materials Science and Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/4205045.

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The interactions between an eco-spiral bolt and crushed rocks in a borehole were evaluated by pull-out testing in a laboratory and numerical analysis. The porosity of the crushed rock surrounding the bolt depended on the size of the eco-spiral bolt and affected the eco-spiral bolt’s axial resistance force. The axial resistance force and the porosity of the crushed rocks in the borehole showed an inverse relationship. The porosity was also related to the size of the eco-spiral bolt. The maximum principal stress between the bolt and the rock was related to the porosity of the crushed rock and th

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14

Chepiga, Daria, Serhii Pakhomov, Vitalii Hnatyuk, Maksym Hryhorets, Yaroslav Liashok, and Serhii Podkopaiev. "Determining the deformation properties of crushed rock under compressive compression conditions." Eastern-European Journal of Enterprise Technologies 4, no. 1 (124) (2023): 85–95. http://dx.doi.org/10.15587/1729-4061.2023.284386.

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The object of this study is the process that forms fill materials from crushed rock under load for managing the condition of side rocks in a coal-bearing massif with preparatory workings. Deformation properties of crushed rock under laboratory conditions were evaluated on the basis of a study of compressive compression of the fill material. It was registered that there is a quadratic functional dependence between the change in the bulk density of crushed rock of different granulometric composition and the specific potential energy of deformation. It was experimentally established that the spec

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15

Wang, Liangliang, Qianlong Zhu, Yan Jia, and Hu Li. "Experimental Study on the Interface Characteristics of Reinforced Crushed Rock Cushion Layer Based on Direct Shear Tests." Materials 16, no. 17 (2023): 5858. http://dx.doi.org/10.3390/ma16175858.

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Through indoor large-scale direct shear tests, the interface characteristics of the crushed rock cushions layer reinforced with ParaLink geogrid were studied. The test results indicate that the shear strength of the crushed rock aggregate and the interface strength parameters have a non-linear relationship with the normal stress. The addition of the geogrid reduces the shear strength of the crushed rock aggregate and the interface strength parameters, which is mainly due to the relatively large size, small thickness, and high smoothness of the geogrid. The reinforced geogrid has a significant

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16

Cheng, Kai, J. Alex Zumberge, Stephanie E. Perry, Patrick M. Lasswell, and Themi Vodo. "Adaptation of Crushed Rock Analysis to Intact Rock Analysis To Improve Assessment of Water Saturation and Fast Pressure Decay Permeability." SPE Journal 27, no. 01 (2021): 715–27. http://dx.doi.org/10.2118/206754-pa.

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Summary Legacy crushed rock analysis, as applied to unconventional formations, has shown great success in evaluating total porosity and water saturation over the previous three decades. The procedure of crushing rock into small particles improves the efficiency of fluid recovery and grain volume measurements in a laboratory environment. However, a caveat to crushed rock analysis is that water and volatile hydrocarbons evaporate from the rock during the preparatory crushing process, causing significant uncertainty in water saturation assessment. A modified crushed rock analysis incorporates nuc

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17

Aatheesan, T., A. Arulrajah, M. W. Bo, B. Vuong, and J. Wilson. "Crushed brick blends with crushed rock for pavement systems." Proceedings of the Institution of Civil Engineers - Waste and Resource Management 163, no. 1 (2010): 29–35. http://dx.doi.org/10.1680/warm.2010.163.1.29.

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18

Khafizova, E. N., I. F. Panchenko, and D. A. Panchenko. "Use of rock crushing technological wastes for cement concrete compositions." Russian Automobile and Highway Industry Journal 18, no. 6 (2022): 790–99. http://dx.doi.org/10.26518/2071-7296-2021-18-6-790-799.

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Introduction. the article deals with the issues of the use of technological waste generated during rocks crushing.Materials and Methods. In the research the rock crushing screenings from the Rezhevsky crushed rock plant and dolomite screenings from the Satkinsky crushed rock plant were used. The data on the physical-mechanical properties of crushing waste is presented, as well as a study of dusty rock cuttings made with a Fritsch Analysette 22 laser particle size analyser. The structure of concrete was analyzed by JEOL JSM-6510 electron microscope.Results. The studying results of heavy weight

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19

БАБЕЛЛО, В. А., В. М. ЛИЗУНКИН, М. В. ЛИЗУНКИН, and С. А. СОБОЛЕВ. "CRUSHED ROCK STRENGTH TESTING AT IRON RIDGE DEPOSIT." Физико-технические проблемы разработки полезных ископаемых, no. 2 (May 5, 2023): 82–90. http://dx.doi.org/10.15372/ftprpi20230208.

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Для расчета устойчивости ограждающей дамбы хвостохранилища проведены экспериментальные исследования раздробленных скальных пород на крупногабаритном стенде методом среза целиков. Определены их прочностные свойства при различных значениях гранулометрического состава и плотности, а также диаметра срезных колец и нормального давления. Установлено, что угол внутреннего трения раздробленных скальных пород в уплотненном состоянии изменяется в диапазоне 35 -40°, сцепление от 0.0256 до 0.0293 МПа, в неуплотненном состоянии в диапазоне 25 - 30° и от 0.0163 до 0.0184 МПа соответственно. Crushed rock she

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Arulrajah, A., J. Piratheepan, M. W. Bo, and N. Sivakugan. "Geotechnical characteristics of recycled crushed brick blends for pavement sub-base applications." Canadian Geotechnical Journal 49, no. 7 (2012): 796–811. http://dx.doi.org/10.1139/t2012-041.

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This paper presents the findings of a laboratory investigation on the characterization of recycled crushed brick when blended with recycled concrete aggregate and crushed rock for pavement sub-base applications. The engineering properties of the crushed brick blends were compared with typical state road authority specifications in Australia for pavement sub-base systems to ascertain the potential use of crushed brick blends in these applications. The experimental programme included particle-size distribution, modified Proctor compaction, particle density, water absorption, California bearing r

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Wang, Da Peng. "Study on Model Experiment of Crushed Rock Layer Eliminate the Differential Settlement." Applied Mechanics and Materials 170-173 (May 2012): 218–22. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.218.

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Model experiment box for crushed rock layer to eliminate the differential settlement was designed. Through the model experiment, the effect of eliminating differential settlement was validated and the truth of it was analyzed. Then the concept and the expressions of the secondary loose coefficient was established. Through measuring the secondary loose coefficient of different rock layers by designed measure box, the relationships of grain diameter of crushed rock, grain figure of gravel and the friction angle with the secondary loose coefficient were analyzed respectively. The research indicat

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Chen, Ji, Yu Sheng, Yaling Chou, Lei Liu, and Bo Zhang. "Cooling Effect of Crushed Rock-Based Embankment along the Chaidaer-Muli Railway." Advances in Materials Science and Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/182437.

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This paper presents an experimental study of the cooling effect of crushed rock-based embankment on slope wetlands along the Chaidaer-Muli Railway. The result shows that only the embankment shady side can be effectively cooled down in a warm permafrost region and the crushed rock-based embankment can cool the entire embankment in a cold permafrost region. The crushed rock-based embankment cannot eliminate the problems from the south-north slope. Slope wetland can influence the temperature field of the crushed rock-based embankment. On the uphill side, it will lead to degradation in some cases

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23

Wei, Hong Yun, Wei Feng Zhou, and Jian Yong Sun. "Analysis on Mechanical Response for Asphalt Pavement Based on Thickness Variation for Transition Layer of Graded Crushed Rock." Applied Mechanics and Materials 505-506 (January 2014): 244–50. http://dx.doi.org/10.4028/www.scientific.net/amm.505-506.244.

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The graded crushed rock layers is set between asphalt surface course and semi-rigidity base course to effectively prevent or reduce the reflection crack of semi-rigidity base course and improve the draining condition of asphalt pavement, however, the graded crushed rock is low in modulus and is provided with nonlinearity stress-strain characteristic, and the addition of this transition layer may cause the stress variation of pavement structure. Through applying KENPAVE pavement design program, analyze the mechanical response discipline on pavement structure layer by thickness variation of grad

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Wood, J. M. "Crushed-Rock Vs. Full-Diameter Core Samples for Water-Saturation Determination in a Tight-Gas Siltstone Play." SPE Reservoir Evaluation & Engineering 18, no. 03 (2015): 407–16. http://dx.doi.org/10.2118/174548-pa.

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Summary The efficacy of crushed-rock samples vs. small plugs or full-diameter core samples for measurement of porosity, permeability, and fluid saturation is an important consideration in the evaluation of tight-gas reservoirs and shale-gas reservoirs. Crushed-rock core analysis methods originally developed for shale reservoirs are now, in some cases, being extended to low-quality tight-gas reservoirs. In this study, crushed-rock and full-diameter core measurements from two wells drilled with oil-based mud are compared to evaluate which of the two core-analysis methods is more reliable for wat

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Liu, Zhao Hui, Xiao Xiao Sun, Ren Jie Qin, and Peng Yuan. "Crushed Run Rock Subcrust Material and Construction Control Technology Research." Advanced Materials Research 428 (January 2012): 206–10. http://dx.doi.org/10.4028/www.scientific.net/amr.428.206.

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In order to settle the influence easily on the foundation soil of high liquid limit red clay by free water in Southern hot and humid regions, and to increase the carrying capacity of the foundation soil, combined with ning (yuan) - dao (county) highway entity engineering, the thought was put forward that to construct the 20cm thick graded crushed rock subcrust (crushed run rock) on the top of the roadbed finish machining area, and analyze the strength forming principle of the crushed run rock subcrust ,and make the mix design, then get the optimum water content and the quality control standard

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Qian, Jin, Qihao Yu, Lei Guo, and Jun Hu. "Experimental study on convection characteristics of crushed-rock layer." Canadian Geotechnical Journal 50, no. 8 (2013): 834–40. http://dx.doi.org/10.1139/cgj-2011-0201.

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Research on the measurement of micro wind-velocity and the airflow characteristics in the crushed-rock layer, which is caused by temperature difference, has long been problematic. For the first time, this study obtains the airflow characteristics in a crushed-rock layer by using high-precision micro wind-velocity detectors. Based on the experimental results, this study verifies the theory that the crushed-rock layer is available for convection heat exchange of porous media in a limited space. In boundary temperature fluctuations conditions, the cooling process is closely related to the natural

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27

Li, Meng, Jixiong Zhang, Kai Sun, and Sheng Zhang. "Influence of Lateral Loading on Compaction Characteristics of Crushed Waste Rock Used for Backfilling." Minerals 8, no. 12 (2018): 552. http://dx.doi.org/10.3390/min8120552.

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Crushed waste rock can be used as backfill in goafs to allow re-use of otherwise solid waste and to control surface subsidence. If a certain lateral stress is applied to crushed waste rocks beforehand, they are densified. Therefore, this research investigated the effects of lateral stress on compaction characteristics of waste rocks for backfilling by utilising a self-designed bidirectional loading test system for granular materials. Furthermore, this study tested the changes in the mechanical parameters on lateral and axial loading of waste rocks for backfilling and measured the influence of

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Liu, Xiaolan, Chuanwei Fu, and Shunqun Li. "Temperature and settlement characteristics of graded crushed-rock layer for runway engineering in permafrost regions." PLOS ONE 17, no. 10 (2022): e0274843. http://dx.doi.org/10.1371/journal.pone.0274843.

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To maintain the temperature and settlement stability of a subgrade, a combination of graded crushed rock layer and insulation layer may be applied to optimize pavement structures. This study verifies a proposed numerical model of pavement and subgrade design in permafrost regions and evaluates temperature and settlement characteristics at different particle size and thickness of graded crushed rock layer and different thickness and location of insulation layer. The results show that the temperature and settlement of the combination of graded crushed-rock layer and insulation layer decrease sig

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Tkachuk, Oleksandr, Daria Chepiga, Serhii Pakhomov, et al. "Evaluation of the effectiveness of secondary support of haulage drifts based on a comparative analysis of the deformation characteristics of protective structures." Eastern-European Journal of Enterprise Technologies 2, no. 1 (122) (2023): 73–81. http://dx.doi.org/10.15587/1729-4061.2023.272454.

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The object of this study is the processes of managing the state of lateral rocks in the coal rock array with preparatory workings. The influence of deformation characteristics of the protective structures of the preparatory workings on the stability of lateral rocks in the coal rock array has been established. The stable state of the above-the-drift pillars of coal is provided within the deformation resource, which corresponds to the critical level of the specific potential energy of the deformation. The limits of the deformation resource are the range of change in the relative deformation of

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Wang, Qiong, Zhibiao Guo, Chun Zhu, Songyang Yin, and Dawei Yin. "The Deformation Characteristics and Lateral Stress of Roadside Crushed Rocks with Different Particles in Non-Pillar Coal Mining." Energies 14, no. 13 (2021): 3762. http://dx.doi.org/10.3390/en14133762.

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Gob-side entry retaining formed by roof fracturing (GERRF) is a popular non-pillar mining method. The method uses crushed rocks in gob side to support and control the movements of the gob roof. These crushed rocks will deform under roof pressure and generate desirable lateral stress on support structures of gangue rib. In this study, the deformation behavior of crushed mudstones with different particle sizes under incremental loading was investigated with an innovative experimental device that simulated boundary conditions of the GERRF method. Influence of particle size of the crushed mudstone

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Liang, Wei, Bin Yang, Yun Liang Zhao, Yu Li, and Xin Kun Wen. "Comparison Experiments on Relieving Differential Settlement of Subgrade by Graded Crushed Rock in Different Particle Sizes." Advanced Materials Research 383-390 (November 2011): 3151–56. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.3151.

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By the self-made experimental device, the experiment research on the role of relieving differential settlement of subgrade on graded crushed rock in different particle sizes has conducted. The experiment has tested the stress of central, edge and corner of the slab when cavity is produced. The experiment results show that, the graded crushed rock is able to better correspond differential settlement deformation of the subgrade, the liquidity of the bulk particle can fill the cavity spaces. The stress in the slab increases with the addition of the cavity height and the loading. The graded crushe

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Tkachuk, О., and V. Hnatiuk. "COMPARISON OF DEFORMATION PROPERTIES OF PROTECTIVE STRUCTURES OF PREPARATORY MINING ROADWAYS ON EXPERIMENTAL SAMPLES." Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, no. 1 (2023): 152–65. http://dx.doi.org/10.31474/2415-7902-2023-1-152-165.

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Purpose. Investigate and compare the deformation properties of protective structures in the form of coal pillars and structures made of crushed rock for a justified choice of the protection method, which can make it possible to ensure the stability of side rocks in the coal massif and preparatory works in the mining areas in the coal mine. Methodology. To achieve the goal, laboratory studies were performed on experimental samples subjected to uniaxial compression. For pillars, their thickness was changed, whereas for structures made of crushed rock the thickness of the rock layer was changed a

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Lozhnikov, O. V., V. O. Adamova, and M. M. Slivenko. "Justification of the safe parameters of recreational zones during the reclamation of watered residual quarry spaces." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 5 (October 30, 2024): 85–92. http://dx.doi.org/10.33271/nvngu/2024-5/085.

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Purpose. To determine the safe parameters of the recreational zones created in the residual space of the quarry taking into account the physical and mechanical properties of waste rocks in a watered state. Methodology. The Bishop Simplified Method is used to determine the influence of the irrigation level of the residual quarry space on the stability of the embankment from different types of mining rocks when creating a recreational area during reclamation works. Findings. The safe parameters of recreational areas during their construction in the watered residual space of the quarry were estab

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Qin, Xuan, Zhiguo Cao, Lichang Wei, Huan Yang, Hao Sun, and Shenggui Zhou. "Spatio-temporal evolution laws of storage coefficient of coal mine underground reservoir and contact network of crushed rock." PLOS ONE 18, no. 10 (2023): e0293611. http://dx.doi.org/10.1371/journal.pone.0293611.

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Spatio-temporal evolution laws of storage coefficient and contact network of crushed rock are of great significance for the construction and utilization of underground reservoirs in coal mines. Based on discrete element method and irregular rigid block model, spatio-temporal evolution laws of storage coefficient and contact network of crushed rock under different overburden stresses are investigated and the following main conclusions are obtained: (1) The average storage coefficient and the storage coefficient at different vertical heights of the crushed rock packing system decrease exponentia

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Korol, Anton. "The influence of the rigidity of mining security structures on the stability of side rocks in the coal-rock massif." Technology audit and production reserves 3, no. 1(59) (2021): 19–22. http://dx.doi.org/10.15587/2706-5448.2021.235403.

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The object of research is the processes of controlling the state of side rocks to prevent the collapse of the stratified rock strata in the coal-rock massif containing the workings. The studies carried out made it possible to establish the influence of the rigidity of the guard structures of mine workings on the stability of side rocks in the coal-rock massif. It is proved that as a result of the action of an external compressive load on the supporting lateral rocks, the structure, in the form of a model of bunches made of wooden posts, increases its rigidity until the destruction of the secur

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36

Anton, Korol. "The influence of the rigidity of mining security structures on the stability of side rocks in the coal-rock massif." Technology audit and production reserves 3, no. 1(59) (2021): 19–22. https://doi.org/10.15587/2706-5448.2021.235403.

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<em>The object of research is the processes of controlling the state of side rocks to prevent the collapse of the stratified rock strata in the coal-rock massif containing the workings. The studies carried out made it possible to establish the influence of the rigidity of the guard structures of mine workings on the stability of side rocks in the coal-rock massif. It is proved that as a result of the action of an external compressive load on the supporting lateral rocks, the structure, in the form of a model of bunches made of wooden posts, increases its rigidity until the destruction of the s

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37

KARASEV, Maksim Anatol’evich. "Laboratory tests and analysis of mathematical models of deformation of crushed salt rocks." NEWS of the Ural State Mining University, no. 4 (December 15, 2023): 94–105. http://dx.doi.org/10.21440/2307-2091-2023-4-94-105.

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Relevance of the work. For a qualitative prediction of the stress-strain state of host rock massifs during the development of potash and salt mines with chamber-pillar mining systems with the backfilling of the excavated space, as well as in other cases of the use of crushed salts as the backfilling masses, it is necessary to take into account the influence of the backfill massive, which determines the relevance of the study devoted to the laboratory tests and analysis of mathematical models of deformation of crushed salt rocks, which usually represent the backfilling massifs used in these cas

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Paik, Kyuho, Myung Sagong, and Hyungjoo Lee. "Analysis of active earth pressure against rigid caissons backfilled with crushed rock and sand." Canadian Geotechnical Journal 46, no. 10 (2009): 1216–28. http://dx.doi.org/10.1139/t09-051.

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Arching effects in backfill materials generate a nonlinear active earth-pressure distribution behind a rough, rigid retaining wall. There are several analyses for estimating the nonlinear active earth pressures on a retaining wall exerted by a homogeneous backfill in the presence of arching. However, it is not possible to use these analyses for a caisson backfilled with crushed rock and sand, which is common in marine structures. In this study, a new formulation is proposed for calculating the nonlinear active earth pressure acting on a caisson backfilled with crushed rock and sand. The new fo

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Khudyakova, Liudmila I., and Svetlana S. Timofeeva. "PRACTICAL USE OF NONMETALLIFEROUS RAW MATERIALS COPPER-NICKEL DEPOSITS." South of Russia: ecology, development 13, no. 4 (2019): 157–65. http://dx.doi.org/10.18470/1992-1098-2018-4-157-165.

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Aim.Copper-nickel deposits are located all over the world. A large amount of nonmetalliferous raw materials is formed, when they are developed. It moves into dumps and creates environmental risks for the environment. In the dumps magnesium-containing rocks prevail, which must be disposed of. The purpose of the work is to study the possibility of their use in the production of building materials.Methods.The chemical analysis was carried out by gravimetry, photometry, and atomic-absorption spectroscopy. The mineral composition was studied using X-ray phase analysis. The mechanical parameters wer

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Li, Dongqing, Kun Zhang, Gangqiang Tong, Feng Ming, and Xing Huang. "Analysis on Cooling Effect of Crushed-Rocks Embankment of Qinghai-Tibet High-Grade Road." Modelling and Simulation in Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/384304.

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In order to study the cooling effect of the crushed-rocks embankment, the permeability and the inertial resistance coefficient were measured by the wind tunnel test of spheres with a diameter of 20 cm, and then the stabilities of the closed crushed-rocks embankment with the wide pavement, the closed crushed-rocks embankment with the narrow pavement, and the duct-ventilated and closed crushed-rocks embankment were calculated. In the next 50 years, assuming that the temperature in Qinghai-Tibet plateau will rise by 2.6°C condition, the cooling effects of these three special high-grade embankment

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Jiang, Ning, Dawei Yin, Junbiao Ma, Liu Han, Haiyang Pan, and Qian Yin. "Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf." Geofluids 2021 (March 11, 2021): 1–11. http://dx.doi.org/10.1155/2021/6675984.

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To study the long-term bearing characteristics of crushed gangue in goaf under water immersion conditions, the creep test of the crushed gangue in the water immersion state was performed by using the self-developed large-scale deformation-seepage test system of crushed rock. The effects of the rock lithology, axial stress, and grain composition on the long-term bearing deformation characteristics and fractal characteristics of crushed gangue under water immersion were analysed. The results show that under certain conditions of axial stress and grain composition of the gangue, a greater uniaxia

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Zhang, Jixiong, Yu Liu, Nan Zhou, and Meng Li. "Pore pressure evolution and mass loss of broken gangue during the seepage." Royal Society Open Science 5, no. 10 (2018): 180307. http://dx.doi.org/10.1098/rsos.180307.

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Broken gangue consists of different particles, and it has more complicated seepage characteristics than intact rock sample. Using the self-designed instrument, the permeability, mass loss and pore pressure of crushed gangue during the seepage are tested. The result shows that permeability parameter k of crushed rock has a polynomial relationship with effective stress σ ′ in inverse proportion, and permeability parameter β of crushed gangue has power exponent relationship with effective stress σ ′ increasing in direct proportion. The particle size of 8.0–10.0 mm has a good support effect. The i

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Ouyang, S., and J. J. K. Daemen. "Design of bentonite/crushed rock seals." Geotechnical and Geological Engineering 9, no. 1 (1991): 63–72. http://dx.doi.org/10.1007/bf00880984.

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Thompson, J. L. "Actinide behavior on crushed rock columns." Journal of Radioanalytical and Nuclear Chemistry Articles 130, no. 2 (1989): 353–64. http://dx.doi.org/10.1007/bf02041355.

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Wu, H., X. Zhang, and J. Liu. "Thermo-mechanical Stability Analysis of Hollow Cellular Concrete Block Air Convection Embankments for Cold Regions." IOP Conference Series: Earth and Environmental Science 1332, no. 1 (2024): 012025. http://dx.doi.org/10.1088/1755-1315/1332/1/012025.

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Abstract Crushed-rock air convection embankment (ACE), as a highly open-graded porous medium, has been used to mitigate the thaw settlement of pavement structures in permafrost regions. Previous studies have revealed that cellular concrete has significant potential as a cost-effective material for ACE to solve the problem of crushed rock shortage in interior Alaska and improved the thermal stability of pavement structures in cold climates. The design configurations of the hollow cellular concrete block ACE were further designed to maximize the performance benefits and facilitate future impleme

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Gao, Jianqiang, Dongge Jiang, and Wenrui Du. "Laboratory Study on the Water-Heat Behavior and Freeze-Thaw Deformation of a Composite Embankment considering Rainfall in Seasonally Frozen Regions." Mathematical Problems in Engineering 2022 (September 9, 2022): 1–11. http://dx.doi.org/10.1155/2022/9706867.

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Based on the similarity theory, a laboratory experiment considering the influence of rainfall was performed to study the water-heat behavior and freeze-thaw deformation between the normal embankment and the composite embankment, consisting of permeable geotextile, crushed-rock interlayer, and waterproof geomembrane. The results showed that due to the existence of crushed-rock interlayer, the effective frozen depth of the composite embankment was smaller than that of the normal embankment. In the rainfall period, because of the drainage function of permeable geotextile and a crushed-rock layer,

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Oleksandr, Tkachuk, Chepiga Daria, Pakhomov Serhii, et al. "Evaluation of the effectiveness of secondary support of haulage drifts based on a comparative analysis of the deformation characteristics of protective structures." Eastern-European Journal of Enterprise Technologies 2, no. 1(122) (2023): 73–81. https://doi.org/10.15587/1729-4061.2023.272454.

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The object of this study is the processes of managing the state of lateral rocks in the coal rock array with preparatory workings. The influence of deformation characteristics of the protective structures of the preparatory workings on the stability of lateral rocks in the coal rock array has been established. The stable state of the above-the-drift pillars of coal is provided within the deformation resource, which corresponds to the critical level of the specific potential energy of the deformation. The limits of the deformation resource are the range of change in the relative deformation of

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Chumachenko, Natalia G., Vladimir V. Tyurnikov, and Maria G. Kalinina. "Dumps and landfills from of carbonate rock waste of the river Sok quarry." Urban construction and architecture 12, no. 4 (2023): 60–66. http://dx.doi.org/10.17673/vestnik.2022.04.08.

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The article is devoted to wastes generated at extraction, crushing and sorting of carbonate rock in order to obtain the finished product which is crushed stone. The article presents the information of carbonate rocks on the river Sok deposit. As a result of production at the Sok quarry two groups of waste are formed: overburden rocks and waste dumps; dolomite and limestone meal. The volume of overburden rocks and dumps is constantly increasing. Dolomite and limestone meal formed by crushing and sorting of rocks, with inclusions of crushed stone are sent to the dumps of cuttings without dividin

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Chi, Xiaolou, Qiang Fu, and Ke Yang. "Experimental Study on Compaction Characteristics and Mechanical Behavior of Crushed Rock Masses." Geofluids 2022 (July 15, 2022): 1–17. http://dx.doi.org/10.1155/2022/9325958.

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The compaction and consolidation process of a regenerated roof can be divided into two stages, namely, secondary fragmentation of crushed rock masses and pore structure adjustment. Therefore, the mechanical properties of the regenerated roof differs significantly from those of the primary roof. We performed confined compression tests of crushed mudstones and sandy mudstones using a self-developed compression testing apparatus. We studied the influence of the moisture content, compression ratio, particle size, and volume-based degradation on the compression and consolidation characteristics bas

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Lee, Woo Keun, Hyo Jin Ban, and I. Rang Im. "Recycling of Waste Rock as a Filler to Prevent Ground Subsidence." Materials Science Forum 544-545 (May 2007): 617–20. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.617.

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In this study, we investigate to use waste rock as a filler for filling the cavity of abandoned mines. We discuss that waste rock can be used as a filler in the side of environmental and structural stability. Waste rocks from four mines, such as Samgi, second Yeonwha, Dongwon and Dogye, are used. Leaching tests are conducted to check the environmental stability by four methods of Soil Leaching Test, MALT, TCLP and KSLT. According to the results, Cu, Cd, Cr and As were not detected and other metals leached below 0.5 ppm. Compressive strength of waste rock and crushed waste rock are measured to

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