Results 71 to 80 of about 1,192,587 (115)

Mechanism and Prevention of Rock Burst Induced by Wide Coal Pillar in Thick Hard Coal Seam

, 2020
Aiming at the phenomenon of rock burst induced by wide coal pillars in thick hard coal seam in Hujierte Mining Area, the distribution characteristics of vertical stress of wide coal pillar has been analyzed by means of field measurement and numerical ...
LIU Weijian, MA Binwen
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Analysis of coal drawing law and parameter research in shallow buried double hard and extra-thick coal seam

, 2022
The coal resources in Xinjiang are shallowly buried, the coal seam is thick, resulting in poor top coal caving and drawing. And the roof is overhanging in a large area, which makes it impossible to achieve safe and efficient top coal mining.
ZHANG Jiaqi, SUN Qiang, LI Yafeng, ZHANG Hao, WU Zhongya, SHAN Chengfang, WANG Jianjian   +6 more
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Mechanism and prevention of rock burst induced by horizontal sublevel mining of a steeply inclined extra-thick coal seam

, 2021
In order to prevent the rock burst caused by horizontal sublevel mining of a steeply inclined extra-thick coal seam, the mechanism of rock burst induced by the superposition of dynamic and static loads and the corresponding prevention measures were ...
WANG Zhengyi, DOU Linming, HE Jiang, CAO Jinrong
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Research on the "two-zone" heights of soft stratum working face with slicing full-mechanized caving mining

矿业科学学报, 2019
Water and sand inrush is one of the principal factors that restrict safe and effective production of mining under water body.The threat to soft strata mines with extremely thick coal seam is especially more serious.Caving zone and fissure zone(joint name
Zhang Bin, Xu Yanchun, Li Jianghua, Xiong Bin   +3 more
doaj   +1 more source

FDEM-based analysis of overlying strata fracture mechanisms and surface subsidence prediction in shallow-buried ultra-thick coal seam mining

Meitan kexue jishu
Shallow buried extra-thick coal seams are widely distributed in the western mining areas of China, due to their shallow burial depth, thin bedrock layers and thick loose layers, and other storage characteristics, in the process of mining both overburden ...
Ran BI, Chaofan YANG, Haozhe HUANG, Jianxi REN, Yongjun SONG, Pengyu ZHU   +5 more
doaj   +1 more source

Measurement of Coal Body Stress and Research on Reasonable Width of Coal Pillar in Thick Coal Seam with Large Dip Angle

, 2020
The mining of thick coal seam is different from the mining of general thick coal seam. The thickness of the first mining is increased, which makes the space of overlying strata rotary movement increase, and it is easy to induce more intense mine pressure.
ZHANG Xizhai, WANG Wenlin
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Study on the Mine Pressure Behavior Regularity of Roadways When Passing Through Remaining Coal Pillars in Thick Seam Mining

Applied Sciences
Residual coal pillars retained in the overlying seam represent an important source of stress disturbance that can intensify mine pressure responses in underlying thick coal seam mining.
Gaochuan Guo, Dingding Zhang, Yanyan Duan, Lianbing Zhang, Zhicheng Han, Hui Liu   +5 more
doaj   +1 more source

Distribution Characteristics of Stress Sources and Surrounding Rock Structure Control Techniques of Gob-Side Entry Driving in Extra-Thick Coal Seam

Advances in Civil Engineering
To address the challenges of surrounding rock control caused by complex stress sources and intense ground pressure in gob-side entry driving (GED) with narrow coal pillars under extra-thick coal seams, this study takes the 10 m-thick coal seam 8204 panel
Dongjie Jiang, Guangzhong Sun, Junjie Guo, Junwen Li, Xing Xu, Qi Ma   +5 more
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Mechanical analysis of rock burst induced by fracture and rebound of rock pillar in mining of steeply inclined extra-thick coal seam group

Meitan xuebao
In order to reveal the mechanism of breaking and inducing rock pillars between coal seams in steeply inclined and extra thick coal seam group mining, the mining of steeply inclined and extra-thick coal seam group in Wudong Coal Mine is taken as the ...
Shenghu LUO, Chengyang TIAN, Yongping WU, Panshi XIE, Hongwei WANG, Ding LANG, Zhuangzhuang YAN, Gang HAN, Mingming SUN   +8 more
doaj   +1 more source

Top coal caving mining technique in thick coal seam beneath the earth dam

, 2017
It is important to study the mining technology under structures for raising the coal resources recovery ratio. Based on the geological and mining conditions, the top coal caving harmonic mining technique in thick coal seam beneath the earth dam was put ...
Yi Tan, Wenbing Guo, Erhu Bai
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