Results 81 to 90 of about 437 (161)

Research on subsidence law of overlying strata in full mining of extra-thick coal seam

Gong-kuang zidonghua, 2021
The problem of strong mine pressure during the mining of the near goaf working face in Datong coalfield is more serious than that of the first mining face. In order to study the overlying strata movement law under the full mining conditions of extra-thick coal seam, the overlying strata movement of 8202 working face in Tongxin Coal Mine is monitored ...
WANG Jun1, ZHU Weibing1, XIE Jianlin2
openaire   +1 more source

Limitations of Upper Protective Layers as Pressure Relief Measures for Extra-Thick Coal Seam Mining: Insights from a Case Study

Energies
Upper protective layer (UPL) mining is extensively utilised as a pressure relief strategy to prevent outbursts and coal bursts. However, when the excavation height of the protected layer is substantial, the depressurisation efficacy of the protective ...
Yanjiang Chai, Linming Dou, Jiang He, Xiaotao Ma, Fangzhou Lu, Hu He   +5 more
doaj   +1 more source

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

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

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
doaj   +1 more source

Research on Gas Extraction and Cut Flow Technology for Lower Slice Pressure Relief Gas under Slice Mining of Extra-thick Coal Seam. [PDF]

ACS Omega, 2022
Shi Z, Ye D, Hao J, Qin B, Li G.
europepmc   +1 more source

Instability mechanism of coal pillar in steeply dipping ultra-thick coal seam “segmented and stratified” combined mining

Meikuang Anquan
In order to solve the problems of frequent high energy microearthquakes and large roadway deformation in full-mechanized caving “segmented and stratified” combined mining in Yanbei Coal Mine with large dip angle and extra-thick coal seam, theoretical ...
Yong LIU, Yao YANG, Xiao WANG, Wenqiang WANG, Xuesong WU, Anye CAO, Zujun LU, Tao YANG, Zhanquan WEI   +8 more
doaj   +1 more source

Analysis of Ground Behavior Regularity of Fully Mechanized Face with Extra Thick Coal Seam

Gong-kuang zidonghua, 2011
The paper used methods of field strata control observation and RFPA numerical simulation to analyze and study ground behavior regularity of fully mechanized face with extra thick coal seam of easy spontaneous combustion in Gengcun Coal Mine.
REN Yong-kang, LI Bao-fu, WANG Fu-li
doaj  

Key technology and equipment for fully mechanized mining with extra-large shearing height of 10 m in extra-thick coal seam

Meitan xuebao
Fully mechanized mining technology with extra-large shearing height is the optimal technical approach to achieve high-yield, high-efficiency and high-recovery mining for 6−10 m ultra-thick coal seam in Chinese coal mines.
Hongpu KANG, Yajun LEI, Futang ZHAO, Gang XU, Zenglin LI, Mingzhong LI, Rui WANG, Zhizeng HUANG, Jiangbin LIU, Ying MA, Cundi HAN, Yanjun FENG, Zhen ZHANG, Jinhu ZHANG, Jianchao REN, Yejie SONG, Mingsheng ZENG, Lixing CHENG   +17 more
doaj   +1 more source