Results 81 to 90 of about 5,124 (199)

Failure mechanism of the coal wall at the working face based on an eccentric compression mechanical model

Deep Underground Science and Engineering, Volume 5, Issue 1, Page 127-143, March 2026.
In this study, the nonuniform distribution of the bearing pressure in front of the coal wall has been revealed based on in situ monitoring data and numerical simulation results. Therefore, an eccentric compression mechanical model of the coal wall was established to study the deformation and failure characteristics of a coal wall. The slenderness ratio
Maolin Tian, Jiabao Wang, Changsheng Wang, Shijie Sun, Lijun Han, Qingbin Meng, Sunhao Zhang   +6 more
wiley   +1 more source

Study on Key Parameters of Roof Cutting and Surrounding Rock Control Technology for Gob-Side Entry Retaining in Fully Mechanized Top Coal Caving Mining of Thick Coal Seams

Applied Sciences
In thick coal seam conditions, the surrounding rock deformation in the longwall mining faces’ along-the-goal roadway is severe, and the support strength struggles to meet roadway retention requirements.
Menglong Zha, Chong Li, Yadong Zheng, Huan Xia, Menghu Sun, Shuaishuai Jiang   +5 more
semanticscholar   +1 more source

Case Studies of Comprehensive Gas Control Method during Fully Mechanized Caving of Low-Permeability Ultrathick Coal Seams

Geofluids, 2021
Slicing fully mechanized caving mining is a standard high-efficiency mining method for ultrathick coal seams. However, the effectiveness of gas control has accentuated the difficulty in fully mechanized top coal caving of low-permeability ultrathick coal
Bangyou Jiang, Shitan Gu, Wenshuai Li, Guangchao Zhang, Jihua Zhang   +4 more
doaj   +1 more source

Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways

Energy Science &Engineering, Volume 14, Issue 3, Page 1195-1212, March 2026.
Principal stress‐evolution diagram at different advance positions of 42205 working face. ABSTRACT To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in ...
Ai‐Rong Wang, Tao Peng, Kang Zhou, Chong‐Yu Song   +3 more
wiley   +1 more source

Fracture Distribution Characteristics of Mining-induced Overburden in Thick Coal Seam and Pressure Relief Gas Extraction Technology

Meikuang Anquan, 2020
Aiming at the safety problem of high gas emission in 2303 fully mechanized caving face of Cuijiagou Coal Mine, the evolution law of “three zons” in goaf is studied by using physical similarity simulation and UDEC numerical simulation experiment on the ...
XU Gang, WANG Yunlong, ZHANG Tianjun, PAN Hongyu
doaj   +1 more source

Study on Multisize Effect of Mining Influence of Advance Speed in Steeply Inclined Extrathick Coal Seam

Lithosphere, 2022
Aiming at the multisize effect of mining in steeply inclined extrathick coal seam, taking the fully mechanized top-coal caving mining in B3+6 coal seam +425 level in the south of Wudong coal mine as the background, this paper studies the mining stress ...
Chong Jia, Xingping Lai, Feng Cui, Ganggui Feng, Shifeng He, Yuanjiang Gao, Mengqi Tian   +6 more
doaj   +1 more source

Agricultural System Resilience of Industrial Hemp: An Exploratory Value Web Analysis in the Swabian Alb

GCB Bioenergy, Volume 18, Issue 2, February 2026.
This study assessed the industrial hemp value web resilience in the Swabian Alb, Southern Germany, where regional implementation remains limited despite hemp's bioeconomy potential. Using an indicator framework and stakeholder interviews, the research found the small, fluctuating cultivation area (e.g., 25 ha in 2024) focuses on hemp seed valorisation;
Lena‐Sophie Loew, Moritz von Cossel
wiley   +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, Volume 2026, Issue 1, 2026.
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 of Tashan Coal Mine as the engineering background.
Dongjie Jiang, Guangzhong Sun, Junjie Guo, Junwen Li, Xing Xu, Qi Ma, Arnab Biswas   +6 more
wiley   +1 more source

Research Progress and Typical Cases of Deep Mines Backfill Technology in China

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
With the increasing depletion of shallow mineral resources and the growing demand for metals, deep mining has become a strategic focus for China. However, deep mining operations face a series of complex challenges, including high ground stress, elevated geothermal gradients, and severe rockburst hazards.
Shuai Li, Zhenyu Dan, Haoxuan Yu, Zhenzhong Xiang, Junyu Chen, Luyu Wang   +5 more
wiley   +1 more source

Study on the Evolution of Concentrated Stress Distribution in Close‐Proximity Coal Seam Residual Pillars

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Closely spaced coal seams are extensively distributed across China. As shallow coal resources face increasing depletion, coal mining is gradually extending to deeper zones. Deciphering the stress distribution pattern of the residual coal pillar floor in closely spaced coal seams is of profound importance to the safe and efficient mining operations of ...
Dengyan Gao, Chenyang Ma, Wen Luo, Kuiying Gao, Jing Chai, Zhicheng Han, Jianhua Chen, Yinsu Tian, Meilu Yu   +8 more
wiley   +1 more source