Short Cantilever Rock Beam Structure and Mechanism of Gob-Side Entry Retaining Roof in Reuse Period by Jingke Wu, Yun Dong, Jiarui Chen, Chunlei Zhang, Wei Yin, JiHua Zhang, Yongzhen Cheng

“…A dynamic-equilibrium mechanical model of the main roof structure is presented and the formation mechanisms of different types of short cantilever rock beam structures are clarified. The following major conclusions are drawn: (1) Three types of short cantilever rock beam structures occur in the main roof of a gob-side entry retaining during the reuse period, namely, the “short cantilever-articulated rock beam” structure, “short cantilever step rock beam (type I)” structure, and “short cantilever step rock beam (type II)” structure. (2) The stability criterion for these three short cantilever rock beam structures was also determined; that is, when the sliding instability coefficient K ≥ 1, the short cantilever-articulated rock beam structure will form, and when the sliding instability coefficient K < 1, the short cantilever step rock beam (type I or II) will form. (3) The governing law for the thicknesses of the main roof, immediate roof, and coal seam of the short cantilever rock beam structure was clarified; namely, the K-value gradually increases with increases in the thickness of the coal seam, drops sharply and then decreases gradually with increases in the thickness of the main roof, and decreases slowly with increases in the thickness of the immediate roof. …”
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The Effect of Excavation Disturbance on the Stability of Bedding Cataclastic Rock Mass High Slope Containing Multimuddy Interlayers by Fei Liu, Jiaming Zhang, Pengzheng Guo, Wenlian Liu, Zhiqiang Wang, Jipu Chen

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Investigating Reliability of Duimenshan High Rock Slope in Gejiu, Yunnan Province Based on the Monte Carlo Method by A. Fa-You, Wan-cheng Pan, Wen-ping Wu, Shi-qun Yan

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CONTRIBUTION TO THE GEOCHEMICAL STUDY OF KANZI AND MVUANGU PHOSPHATE ROCKS IN THE LEMBA OIL SUB-BASIN OF CENTRAL CONGO by Deko Oyema Bruno, Emmanuel Kazinguvu Atibu, Dan Mandjumba Yenor, Dominique Wetshondo Osomba, Loma Wonga Mathias, John Pote Wembonyama

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Effect of Indenter Angle on Bearing Performance of Coal and Accompanying Rocks Under Point Load and Characterization of Mechanical Parameters by Qian Wang, Yujiang Zhang, Delong Cui, Guorui Feng, Yunlou Du, Shuai Zhang, Haojie Cheng, Zhengjun Zhang

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Failure and development height of overlying rock of a water flowing fracture in goaf under a karst aquifer by Lulin Zheng, Xiong Liu, Qing Qiu, Youwen Tian, Weide Ren, Jin Xu, Xiaokun Wang

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Study of Rock Burst Risk Evolution in Front of Deep Longwall Panel Based on Passive Seismic Velocity Tomography by Kunyou Zhou, Linming Dou, Siyuan Gong, Jiazhuo Li, Jinkui Zhang, Jinrong Cao

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Mechanism and Prevention and Control of Mine Earthquake in Thick and Hard Rock Strata considering the Horizontal Stress Evolution of Stope by Ming Zhang, Xuelong Hu, Hongtao Huang, Guangyao Chen, Shan Gao, Chao Liu, Lihua Tian

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Instability Mode and Control Technology of Surrounding Rock in Composite Roof Coal Roadway under Multiple Dynamic Pressure Disturbances by Peng Wang, Nong Zhang, Jiaguang Kan, Xingliang Xu, Guangzhen Cui

“…The support scheme was finally applied to the on-site industrial test, and the mine pressure monitoring results showed that the deformation of the roadway surrounding rock was effectively controlled under the new support scheme.…”
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Wear Behavior of Aluminium Metal Matrix Composite Prepared from Industrial Waste by L. Francis Xavier, Paramasivam Suresh

“…In this work, Aluminium Metal Matrix Composite is prepared by reinforcing 10 wt% and 20 wt% of wet grinder stone dust particles an industrial waste obtained during processing of quarry rocks which are available in nature. …”
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Fast screening of gold in rock samples using polyurethane foam extraction and inductively coupled plasma mass spectrometry determination by Jalal Hassan, Naeemeh Zari, Mohammad-Hadi Karbasi

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Damage Evolution and Failure Precursor of Rock-like Material Under Uniaxial Compression Based on Strain Rate Field Statistics by Jin Jin, Ping Cao, Jun Zhang, Yanchao Wang, Chenxi Miao, Jie Li, Xiaohong Bai

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A Study on the Dynamic Transmission Law of Spiral Drum Cutting Coal Rock Based on ANSYS/LS-DYNA Simulation by Lijuan Zhao, Hongmei Liu, Wenchao Zhou

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Terminated Main Himalayan Thrust, evidence of Pre-Siwalik Tertiary rocks beneath and evolution of NW Himalayan foreland basin by Madhab Biswas, Kalachand Sain

“…The model also elucidates how the Pre-Siwalik Tertiary formations went down beneath the MHT and Late Proterozoic rock came out of the Indian plate to constitute the DC, BT and MWT.…”
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Data-driven machine learning approaches for simultaneous prediction of peak particle velocity and frequency induced by rock blasting in mining by Yewuhalashet Fissha, Prashanth Ragam, Hajime Ikeda, N. Kushal Kumar, Tsuyoshi Adachi, P.S. Paul, Youhei Kawamura

“…The vibrations generated by rock blasting are a serious and hazardous outcome of these activities, causing harmful effects on the surrounding environment as well as the nearby residents. …”
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Differences in morphological properties between the olivine group minerals formed in natural and industrial processes by Dević S., Marčeta L.

“…The olivines whose formation is tied to rock masses (natural process) and the olivines genetically tied to industrial processes of black metallurgy slags (process metallurgy-Ironmaking) are shown in this paper. …”
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Accurate Perception of Rock Strata Movement for Environmental Protection in Coal Mining: Taking Thick and Hard Roof Cooperative Control as an Example by Tong Zhao, Changyou Liu, Kaan Yetilmezsoy, Majid Bahramian, Peilin Gong

“…Finally, the environmentally friendly strategy (including the CBWDHPT and hydraulic support optimization) for overlying rock strata protection was proposed. In the industrial test, the THR was broken into blocks of different sizes after utilizing the CBWDHPT, and the support working resistance was significantly decreased. …”
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Application of Presplitting Blasting Technology in Surrounding Rock Control of Gob-Side Entry Retaining with Hard Roof: A Case Study by Shuang Gong, Yi Tan, Yunpeng Liu, Dan Zhu, Yang Yu

“…The comprehensive control measures for the surrounding rock of 7135 roadway with roof cutting and pressure relief and gob retaining are formulated, including safety assurance technical measures, such as advanced precrack and seam cutting, roof reinforcement and support, gangue retaining protection beside the roadway, lagging temporary support, and on-site industrial test monitoring scheme. …”
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Study on Pressure Relief Zone Formed Inside Roadway Rib by Rotary Cutting with Pressurized Water Jet for Preventing Rock Burst by Zeng-Qiang Yang, Chang Liu, Hui-Wu Jin

“…By means of on-site industrial application analysis, all these monitoring results verify that when the pressurized water jet is used to conduct rotary cutting of roadway rib, a large-scale pressure relief zone will be formed in the coal mass inside the roadway rib, and it can achieve the purpose of preventing rock burst in the roadway rib. …”
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Research on the Reasonable Coal Pillar Width and Surrounding Rock Supporting Optimization of Gob-Side Entry under Inclined Seam Condition by Li-li Jiang, Zeng-qiang Yang, Gang-wei Li

“…By means of engineering background analysis, theoretical analysis based on inside and outside stress field, numerical simulation by FLAC3D software, and in situ industrial test and relevant monitoring methods, the optimal coal pillar width and surrounding rock control technology are obtained. …”
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