Results 41 to 50 of about 664 (89)

Fractural structure of thick hard roof stratum using long beam theory and numerical modeling

, 2017
The thick hard rock (THR) roof of the long-wall mining face is prone to the large-sized cantilever roof, and its sudden fracture will cause serious rock dynamic disasters, such as coal and gas outburst and rockburst. In this study, based on the long beam
Zhao, Tong, Kaan Yetilmezsoy, Changyou Liu, Shuai Zhang, Liu, Changyou, Zhang, Shuai, Zhang, Baisheng, Tong Zhao, Yetilmezsoy, Kaan, Baisheng Zhang   +9 more
core   +1 more source

Study on the Mechanism and Prevention of Frequent Mine Seismic Events in Goaf Mining under a Multi-Layer Thick Hard Roof: A Case Study

, 2023
Mine seismic events are an inevitable dynamic phenomenon occurring in deep mines. A scientific and rational method is needed to evaluate and understand mine seismicity and its induced disasters. In the Ordos mining area of North China, multiple groups of
Junpeng Ma, Jinwen Bai, Zhongxiang Gao, Sitao Zhu, Zhu Li, Bo Wang, Guorui Feng, Wenda Wu   +7 more
core   +1 more source

Influence mechanism of thick hard layer on fracture and energy release characteristics of composite roof

Scientific Reports
Investigating the instability and energy release characteristics of layered roof structures is crucial for elucidating the mechanism of rockburst induced by strata fracture.
Xiao-shuai Song, Zhi-qi Wang, Peng-fei Zhang, Lei Guo, Tong-bin Zhao, Guo-wen Han   +5 more
doaj   +1 more source

Mechanism of grouped collapse of thick and hard roof for gob-side entry retaining combined backfill in fully-mechanized caving face

Meitan xuebao
A large range of caving roof of gob-side entry retaining is easy to cause impact damage of the roadside backfill body. In order to ensure the stability of gob-side entry retaining, different from the traditional large-angle inclined roof cutting method ...
Guorui FENG, Zijie MA, Wenda WU, Jianbiao BAI, Sunwen DU, Jinwen BAI, Lujin HE   +6 more
doaj   +1 more source

Critical technologies investigation and implementation of underground regional fracturing in hard-thick roof strata in the Inner Mongolia-Shaanxi mining area

采矿与岩层控制工程学报
Targeting strong ground pressure disasters induced by intense mining activities and hard-thick roof strata in the Inner Mongolia-Shaanxi mining area, this study proposes technical countermeasures for ground pressure control through underground regional ...
Yanjun FENG, Hongpu KANG, Kaikai ZHAO
doaj   +1 more source

Deformation Characteristics and Breakage Mechanism of Thick-Hard Roof Based on a Medium-Thick Plate Mechanical Model

To solve the whole cutting-off and large-area weighting of thick-hard roof led by the high-intensity mining in working face, the mechanical mechanism of the impact pressure of thick-hard top working face in the Shendong mining area is studied.
Yufeng Xue, Youlin Xu, Guosheng Li, Zhengzheng Cao, Teng Teng, Desheng Zhu, Yi Xiong, Yi Xue   +7 more
core   +1 more source

Mechanism and Control Technology of Rockburst Induced by Thick Hard Roof and Residual Coal Pillar: A Case Study

, 2023
Rockburst caused by the fracture of thick hard roof and the instantaneous instability of residual coal pillar seriously jeopardize the deep coal mining safety.
Wenjie Liu, Zhainan Zhang, Rijie Xu, Xiang He, Ke Yang   +4 more
core   +1 more source

Evolution Mechanism of Stress-Concentration Shell Structure and Stability Control of Thick–Hard Roofs Based on a Staged Thick-Plate Model

Eng
To address delayed roof fracture, severe stress concentration, and strong strata pressure under thick–hard roof conditions, this study investigated the 1014 mining face of Yushuquan Coal Mine.
Lili Xie, Zhibiao Guo, Jinglin You, Junao Zhu, Yuanxin Zhao   +4 more
doaj   +1 more source

Study on the Application of Gob-Side Entry Retaining via Roof Cutting under the Condition of a Hard Thick Roof

, 2022
To solve the problem of instability and failure of a roadway in the Dianping coal mine working face under the condition of traditional gob-side entry retaining, a mechanical model was established for analysis.
Huyue Zhang, Yi Su, Daoyong Zhu
core   +1 more source

Breaking mechanism of hard thick roof during the life cycle of large mining height working face

Meitan kexue jishu
The hard and thick roof is the force source layer of the large mining height working face. During the life cycle of different large mining height working face, the boundary conditions of the roof are different, which leads to the breaking pattern of the ...
Zhaoyuan LEI, Feng LI, Zikui ZHAO, Lei LI, Xingli HUANG   +4 more
doaj   +1 more source