Tensile Failure Mechanism of Antiseepage System for Slope with Solid Waste Underground Landfill by Liu Fei, Zhongxi Jiang

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Experimental and Numerical Study of Rock Stratum Movement Characteristics in Longwall Mining by Wan-rong Liu

“…The roof fracture is the main cause of coal mine roof accidents. To analyze the law of movement and caving of the roof rock stratum, the roof subsidence displacement, rock stratum stress, and the rock stratum movement law were analyzed by using the methods of the particle discrete element and similar material simulation test. …”
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Ecological restoration in valley area of semiarid region damaged by shallow buried coal seam mining by Chen Puhao, Wang Jianbin, Wang Haiyan

“…The results showed that ERQI values in the study area experienced an evolution process from high to low and then gradually increased, reflecting the impact of coal mine production and restoration activities on the environment, in which Burn Area Index and normalized difference vegetation index were more sensitive; after nearly 10 years of restoration, ERQI values in the study area still had a large gap with that of the reference area, some suggestions for improvement of ecological restoration were put forward. …”
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Interrelationships between Acoustic Emission and Cutting Force in Rock Cutting by Sifei Liu, Peng Shi, Zhijun Wan, Shuaifeng Lu, Jiakun Lv, Fanfei Meng

“…The above conclusions are of great significance for intelligent control of shearer and intelligent mining of coal mine.…”
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Research on a Numerical Simulation and Prediction Model of Floor Mining Failure Depth in the Chenghe Mining Area by Ang Li, Qian Mu, Wenzhong Zhang, Chaoyang Liu, Feng Wang, Lin Mou

“…Ordovician limestone water on the floor is a serious threat to the safety of coal mine production in the Weibei coalfield, and prediction of the floor failure depth is the key for evaluating the mining conditions under pressure. …”
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Optimization of Directional Long Boreholes Unloading Gas Extraction Process and Application Research by Chunhua Zhang, Yuqi Li

“…In order to optimize the pressure relief gas extraction process for the 1504 working face in East 2 of Dalong Coal Mine based on its mining and gas conditions, a physical model of pressure relief gas extraction in the airspace using two preliminary extraction processes—a high-level oblique borehole and a directional long borehole—was established using COMSOL 6.2 software. …”
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Parametric Study on the Ground Control Effects of Rock Bolt Parameters under Dynamic and Static Coupling Loads by Zequan Sun, Lishuai Jiang, Jinquan Jiang, Xingyu Wu, Naser Golsanami, Wanpeng Huang, Peipeng Zhang, Zhongtao Niu, Xiaoyi He

“…The results contribute to the design of supports in the field of underground coal mines and provide a basis for determining the reasonable support scheme for roadways.…”
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A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway by Weidong Pan, Xinyuan Li, YiWei Li, Xiaobin Li, Qing Qiao, Haoran Gong

“…By using a FDEM method, a real case in Xutuan coal mine is studied. Compared with the process without backfill, the z-displacement of cross-cut roof decreased shapely after backfilling, with a maximum z-displacement, decreases from 0.76 m to 0.13 m and from 0.39 m to 0.064 m in PTR and SAR section, respectively. …”
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Experimental Study of Prevention and Control of Rock Burst in Steeply Inclined Coal Seams by Mining Sequence and Filling by Zhihui Zhang, Yangyi Liu, Wenwen Zhu, Jian Liu, Tian Ma, Chunxue Xie

“…In order to figure out the effects of filling and mining sequence on rock burst in the steeply inclined coal seam, B3+6 and B1+2 coal seams in Wudong coal mine are chosen as the research objects, and an in-house experiment system of similarity simulation is established in this study. …”
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Numerical Simulation Study on the Distribution Law of Deviatoric Stress of Floor under the Influence of Mining by Hongtao Liu, Tianhong Huo, Yongen Li, Ming Luo, Guangdong Zhou, Zengji He

“…The Zhaogu No. 2 coal mine is a single thick coal seam mining mine with high gas content. …”
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Porous Blasting Morphology and Resistivity Response Characteristics of Soft Coal Seam by Wenwang Yang, Sanlin He, Taotao Zhao, Chenying Ge

“…The fractal dimension of cracks reaches 21.28%, the negative effect of the blast holes cavity is offset (S > 0), and the resistivity in the controlled area generally increases by 1 to 30 times. (3) Compared with the single-hole blasting model, the multi-hole blasting is more in line with the coal mine site, and can effectively increase the permeability in the control area, and the resistivity generally increases.…”
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Research of the Backfill Body Compaction Ratio Based on Upward Backfill Safety Mining of the Close-Distance Coal Seam Group by Xingping Lai, Leiming Zhang, Yun Zhang, Pengfei Shan, Peifeng Wan, Kaiwen Mu

“…The lower coal seam engineering safety BBCR of upward backfill mining in the Dafosi Coal Mine was 87.2%, and the close-distance coal seam group safe upward mining was realized.…”
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Study of the Roof Deformation Characteristics of Roadway Excavation Face and Unsupported Roof Distance by Jie Zhang, Shoushi Gao, Yifeng He, Tao Yang, Bing Wang, Li Wang, Haibo Pang, Bing Peng

“…To provide a practical example, we calculate the maximum unsupported roof distance of 30304 tailgate in the Yanghuopan Coal Mine to be 3.4 m. Numerical simulation and field monitoring results confirm that the deformation of the roof in the excavation face is minimal, and the stability of the rock is good.…”
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Experimental Study on Crack Extension Rules of Hydraulic Fracturing Based on Simulated Coal Seam Roof and Floor by Lu Gao, Xiangtao Kang, Gun Huang, Ziyi Wang, Meng Tang, Xiaoying Shen

“…Therefore, the hydraulic fracturing test of the simulated combination of the coal seam and the roof and floor under different stress conditions was carried out using the self-developed true triaxial coal mine dynamic disaster large-scale simulation test rig. …”
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Dynamic Influence of Near-Source Seismic Ground Motion on Underground Mine Working Stability Using Time-Frequency Analysis by Adam Lurka, Grzegorz Mutke, Piotr Małkowski

“…The properties of recorded strong ground motion velocity seismograms for two high energy seismic events and two blasts from two underground coal mines in Poland have been extracted with the use of continuous wavelet transform spectrograms showing the duration time of each frequency group. …”
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Shield-Roof Interaction in Longwall Panels: Insights from Field Data and Their Application to Ground Control by Jingyi Cheng, Zhijun Wan, Yinlin Ji

“…Understanding the shield-roof interaction in longwall panels enables us to apply the SSRI system for ground control in longwall coal mines. Early warning of severe roof weighting can be achieved by establishing a warning model based on the decision tree algorithm. …”
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Prospect Analysis of Paleocene Coalbed Methane: A Case Study of Hangu Formation, Trans-Indus Ranges, Pakistan by Hamza Azam Qadri, Ali Wahid, Numair Ahmed Siddiqui, Syed Haroon Ali, Ahmed Abd El Aal, Amirul Qhalis Bin Abu Rashid, Mohd Najib Bin Temizi

“…A number of samples were tested from the different coal mines in terms of these debatable components. The results indicate that the rank of studied coal is bituminous to subbituminous in which the carbon ratio, volatile matter, and sulfur contents are increasing with depth towards the south. …”
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Mechanism of Roadway Floor Heave Controlled by Floor Corner Pile in Deep Roadway under High Horizontal Stress by Xinchao Kang, Dongming Guo, Zhiying Lu

“…In order to overcome the support difficulty of serious floor heave caused by rock burst, with the floor heave of ventilation roadway in Hegang Xing An Coal Mine as the engineering background, the treatment scheme of the concrete-filled steel tube corner pile and floor grouting is put forward. …”
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Stability Analysis and Monitoring Method for the Key Block Structure of the Basic Roof of Noncoal Pillar Mining with Automatically Formed Gob-Side Entry by Jianning Liu, Manchao He, Yajun Wang, Ruifeng Huang, Jun Yang, Xichun Tian, Can Ming, Shan Guo

“…This paper is set in the engineering context of the GEFANM experiment at the Ningtiaota Coal Mine. The study fully considered the differences in the gob roof caving on the roof-cutting-line side, and the range of rotation angles to maintain a stable key block was determined. …”
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Model of Overlying Strata Structure in Large Mining Height Excavating Condition and Calculation of Support Working Resistance by Fengfeng Wu, Xin Yue, Jingxuan Yang, Beiju Du, Jian Zhang, Bo Lv

“…Combining with the mining conditions of Jinhuagong Coal Mine’s large mining height face in Datong mining area, the reasonable support resistance of the working face support is analyzed. …”
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