Results 111 to 120 of about 1,364 (186)

Exploration and summary of prevention and control of rock burst in steeply inclined and ultra-thick coal seam

The roof breaking movement of steeply inclined and ultra-thick coal seam mining is complex, and the evolution law of stress and energy is special. Under the influence of deep ‘three highs and one disturbance’, the prevention and control of rock burst is ...
Qiang ZHANG, Yongzhong WANG, Linming DOU, Jiang HE, Hu HE, Fangzhou LU   +5 more
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Study on the Mechanism of Intense Strata Behavior and Control Technology for Goaf-Side Roadway in Extra-Thick Coal Seam

Applied Sciences
With the depletion of shallow coal resources, deep extra-thick coal seam mining has become vital for energy security, yet fully mechanized top-coal caving (FMTC) goaf-side roadways face severe challenges of excessive advanced deformation and intense ...
Shuai Yan, Yongjie Wang, Jianbiao Bai, Xiaolin Li, Qundi Qu   +4 more
doaj   +1 more source

Influence of goaf inerting on the “three zones” and study on fire prevention and extinguishing technology in ultra-width working face of extra-thick coal seam

Case Studies in Thermal Engineering
Due to the thickness of the coal and the width of the working face in the extra-thick coal seam and ultra-width working face, the distribution of the oxidation zone in the goaf during mining is different from that of the conventional working face, which ...
Lei Li, Yuzhong Yang, Liyun Wu, LeQiang Zou, Yanwei Liu, Fengjie Zhang, Yaowei Zhai, Wanli Yang, Junqi Lei, Lei Peng   +9 more
doaj   +1 more source

Intelligent prediction of time series and grade of rock burst in steeply inclined ultra-thick coal seam excavation roadway [PDF]

Realizing the intelligent warning of rock burst in coal mine is of great significance to ensure the safety of mine operation. Based on the intelligent classification prediction of rock burst occurrence time series in roadway of steeply inclined ultra ...
Suilin ZHANG, Chong JIA, Xingping LAI, Feng CUI, Shifeng HE, Cheng ZONG   +5 more
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Stability and control of surrounding rock of narrow coal pillar in vertical stratification of extra-thick coal seam

Meitan xuebao
Aiming at the problem of large deformation and instability control of narrow coal pillar in the vertical stratification section of extra-thick coal seam, the stability and control technology of the surrounding rock of narrow coal pillar in extra-thick coal seam are studied by combining theoretical analysis, numerical simulation and field test. Based on
Chao WU, Zhiqiang WANG, Yaoru LIU, Jingkai LI, Xinsheng GENG, Lu LIN, Tingzhao LI, Lei SHI, Peng WANG   +8 more
openaire   +1 more source

Response characteristics of gob-side roadways with pre-split thick hard roofs in extra-thick coal seams: based on strain-softening effects

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Pre-splitting of the thick, hard roof improved the stress state of gob-side roadways and reduced the degree of plastic failure. Based on the strain softening effect, methods for calculating the plastic softening zone (SZ) and residual zone (RZ) widths of
Yanhao Wu, Fulian He, Deqiu Wang, Kai Tao, Jianlong Zhang, Jiayu Song   +5 more
doaj   +1 more source

Mechanism and control of deformation in mining roadways with hard roofs in extra-thick coal seams

Frontiers in Materials
Introduction The mining roadways for the exceptionally thick coal seams 3-5 at Tashan Colliery in the Datong Mining District faced the challenge of significant and uncontrollable surrounding rock deformation under hard roof strata conditions, posing a serious threat to safe and efficient operations.
Wen-Zhe Gu, Bei-Yan Zhang, Cheng-Yong Liu, Chao-Feng Yuan, Yan-Bin Yang, Wen-Tao Liu, Xin-Fu Zhang, Heng-Jian Qiu   +7 more
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Cross-Section Shape and Asymmetric Support Technology of Steeply Inclined Thick Coal Seam Roadway

The dip angle and thickness of coal seams are key geological determinants in mine system engineering. Roadways excavated in steeply inclined or thick coal seams typically exhibit significant deformation, with the combined geological configuration of ...
Qi Xu, Junqing Guo, Fan Li, Yanwen Xie, Baisheng Zhang, Zetian Li, Dong Duan   +6 more
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Demonstration project of safe and efficient mining operations in extra-thick coal seam [PDF]

Frontiers of Engineering Management, 2017
openaire   +1 more source

Demonstration Project of Safe and Efficient Mining Operations in Extra-thick Coal Seam [PDF]

Frontiers of Engineering Management, 2016
openaire   +1 more source