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Study on mining deformation and fracture response mechanism and rock pressure law of super thick composite key roof. [PDF]

Sci Rep
Lei W, Shang Y, Lu X, Zhang D, Gong H, Yi W, Zhou H, Yuchi X, Qin B, Du X.   +9 more
europepmc   +1 more source

Application of pre-splitting blasting roof-cutting pressure relief technology for roadway protection under hard roof. [PDF]

Sci Rep
Li Y, Chang G, Hu D, Song W.
europepmc   +1 more source

Science Center 346 (Healing Tree)

, 2018
Yeoh, Zoe
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Study on the fracture characteristics of thick-hard limestone roof and its controlling technique

Environmental Earth Sciences, 2017
The Taiyuan group is one of the coal-bearing formations in Shanxi Province, in which coal resource is extremely abundant. No.15 coal seam is the main minable coal seam in Taiyuan group, and it develops with thick-hard limestone roof which is a threat to safe and efficient mining because of the roof failure.
Jinlong Jia, Liwen Cao, Dianji Zhang, Xiuwei Chai, Shiqi Liu, Li Ma, Liu Han   +6 more
openaire   +3 more sources

Numerical and Field Investigations of Rockburst Mechanisms Triggered by Thick-Hard Roof Fracturing

Rock Mechanics and Rock Engineering, 2022
Zhi-Long He, Cai-Ping Lu, Xiu-Feng Zhang, Ying Guo, Zhao-He Meng, Lei Xia   +5 more
openaire   +3 more sources

Fracture failure analysis of hard–thick sandstone roof and its controlling effect on gas emission in underground ultra-thick coal extraction

Engineering Failure Analysis, 2015
Abstract In underground coal extraction of fully mechanized caving, the overlying hard–thick sandstone main roof could control the failure extent and the movement evolution of the entire overburden strata. The instantaneous failure of the hard–thick sandstone main roof possibly causes strata pressure behaviors, rock-bursts and abnormal gas emissions,
Wei Wang, Yuan-ping Cheng, Hai-feng Wang, Hong-yong Liu, Liang Wang, Wei Li, Jing-yu Jiang   +6 more
openaire   +3 more sources

Ground Control Method of Using Roof Cutting Pressure Release and Energy-Absorbing Reinforcement for Roadway with Extra-Thick Hard Roof

Rock Mechanics and Rock Engineering, 2023
Qi Wang, Zhenhua Jiang, Bei Jiang, Manchao He, Jun Yang, Haojie Xue   +5 more
openaire   +3 more sources

Determination and Engineering Practice of Unsupported Roof Distance for Rapid Excavation of Roadway with Thick and Hard Basic Roof

Geotechnical and Geological Engineering, 2021
In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established, and the relationship between the direct roof tensile stress and the empty roof distance was obtained. According to the criterion of roof stability, that is, the tensile stress of the roof does not exceed ...
Sen Yang, Xinzhu Hua, Peng Yang, Xiao Liu   +3 more
openaire   +1 more source

Response and control technology for entry loaded by mining abutment stress of a thick hard roof

International Journal of Rock Mechanics and Mining Sciences, 2016
Wen-long Shen, Jian-biao Bai, Xiang-yu Wang, Yang Yu   +3 more
openaire   +3 more sources

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

Environmental Earth Sciences, 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 theory, the initial fracture mechanical model for THR was established, and the first weighting ...
Liu, Changyou, Zhang, Baisheng, Zhao, Tong, Yetilmezsoy, Kaan, Zhang, Shuai   +4 more
openaire   +2 more sources