Results 81 to 90 of about 1,192,587 (115)

Disaster mechanism and collaborative control technology of multi-field coupling in extra-thick coal seam with hard roof [PDF]

Addressing the coupled challenges of strong mine pressure and gas, induced by large-span fracture of the hard roof during the mining of thick coal seams, a systematic understanding of the disaster mechanism through multi-field coupling of the hard roof ...
Xiting WANG, Tiejun KUANG, Yang TAI, Binwei XIA, Guozhi LU, Bingjie HUO, Bin YU   +6 more
core   +1 more source

Study on the Failure Characteristics of Coal Wall Spalling in Thick Coal Seam with Gangue

, 2020
Coal wall spalling is one of the main factors restricting the safe and efficient mining of thick coal seam, and the gangue has an important impact on the coal wall spalling.
Feng Du, Guosheng Li, Zhengzheng Cao, Zhenhua Li   +3 more
core   +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

Precursory characteristics and disaster prevention of rock burst in roadway excavation in steeply inclined extra-thick coal seam [PDF]

With the gradual coal mining of deep rock burst mine, the impact accompanying roadway excavation becomes more and more intense. Aiming at the problem of effective prevention and control of rock burst in roadway excavation, taking the steep seam mine in ...
Suilin ZHANG, Chong JIA, Changliang LU, Xudong LIU, Xingping LAI, Feng CUI, Hao WANG, Shifeng HE, Haidong XU   +8 more
core   +1 more source

Study on Overburden Failure and Surface Sinkhole Development Law during Extra-Thick Coal Seam Mining beneath Thick Unconsolidated Layers

To address the problem of surface collapse and sinkhole disasters induced by fully mechanized top-coal caving mining of extra-thick coal seams beneath thick unconsolidated layers, the F6204 working face of Buliangou Coal Mine was selected as the ...
Zhenzhen Huang
core   +1 more source

Study on zoning failure characteristics and support technology in water-drenched roadway of thick coal seam

Aiming at the large deformation and difficult control of the thick coal seam roadway under water-drenched conditions, the zoning damage characteristics of thick coal seam water-drenched roadway and the synergistic control mechanism of double arch zoning ...
Hong GAO
core   +1 more source

Mechanisms and influential factors of rock bursts in tunneling roadways of extra-thick coal seams [PDF]

ObjectiveRock bursts occur frequently in tunneling roadways of extra-thick coal seams, significantly constraining safe coal mining. Investigating their mechanisms and influential factors is crucial to preventing and controlling such disasters in ...
Qi HAO, Xianxi BAI, Chengchun XUE, Dong LI, Anye CAO, Yaoqi LIU, Qiang WANG, Yujie PENG, Guowei LYU   +8 more
core   +1 more source

Research on bending-slip rib spalling and rib stability of extra-thick hard coal wall

Scientific Reports
In response to the frequent occurrence of coal face spalling affecting the working face production during the mining of extra-thick hard coal seams, this study investigates the characteristics of typical hard coal face damage.
Bo Xue, Yan Shang, Chen Wang, Feitian Zhang, Yunfei Liu   +4 more
doaj   +1 more source

Mechanistic study and control of coal pillar deformation and failure in gob-side roadways with extra-thick seams and hard roof

Scientific Reports
To address the large deformation failure of coal pillar ribs in gob-side roadways under the geological conditions of extra-thick coal seams with hard roofs, their mechanical instability mechanism was systematically revealed through comprehensive ...
Jianlin Zhou, Qian Shen, Changjiang Li, Hongyu Jin, Yuxuan Liu, Hanze Jiang, Tongzhu Zhou, Chengyuan Li, Bowen Wang   +8 more
doaj   +1 more source

Study on the Control Effect of Borehole Gas Extraction in Coal Seams Based on the Stress–Seepage Coupling Field

Fire
In order to determine the reasonable parameters of high-gas and extra-thick coal seam drainage, considering the factors of the coal seam metamorphic degree, stress condition, gas occurrence state, and permeability dynamic change, the gas desorption ...
Hongsheng Wang, Huaming An, Bingbing Yang   +2 more
doaj   +1 more source