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

Sci Rep
The 360,606 working face of Xinji 1(#) Mine was taken as an engineering case to address the significant safety hazards associated with coal mining under hard roof. A key technical scheme for pre-splitting blasting roof-cutting pressure relief was developed by theoretical analysis, numerical simulation, and field experiments. The results are as follows.
Li Y, Chang G, Hu D, Song W.
europepmc   +2 more sources

Study on the dynamic response and roadways stability during mining under the disturbance of hard roof break [PDF]

Scientific Reports
Under the condition that the working face was directly covered with hard roof, the abrupt breaking of hard roof release significant amount of energy, thus prone to triggering dynamic disasters such as roadway instability or rockburst. This paper based on
Kong Peng, Liu Chang, Yang Dechuan, Li Shihui, Jin Ruiju   +4 more
doaj   +2 more sources

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

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   +2 more sources

Timely roof breaking and pressure relief technology by hard roof staged fracturing [PDF]

AIP Advances
Hard roofs in longwall mining often generate large roof caving steps during initial weighting and form extended hanging roofs during periodic weighting. These phenomena can lead to sudden cave-ins, rock bursts, and mine seismicity.
Kaige Zheng
doaj   +2 more sources

Numerical simulation study on the mining pressure law and collaborative failure of soft-hard interlayer working face [PDF]

Scientific Reports
Aiming at the problem that the roof of the soft-hard interbedded coal seam is prone to delamination and caving without warning during coal mining, taking the No.
Zhiyuan Hou, Hao Li, Gang Liu, Kai Xie, Pan Wu, Zhitao Yang   +5 more
doaj   +2 more sources

Mining-Induced Stress and Ground Pressure Behavior Characteristics in Mining a Thick Coal Seam With Hard Roofs

Frontiers in Earth Science, 2022
The hard roof of coal mines has the characteristics of high hardness, good integrity, and large layer thickness, which leads to many ground control problems.
Zhijie Zhu, Zhijie Zhu, Yunlong Wu, Zhuang Liang   +3 more
doaj   +1 more source

Analysis of Energy Accumulation and Dispersion Evolution of a Thick Hard Roof and Dynamic Load Response of the Hydraulic Support in a Large Space Stope

Frontiers in Earth Science, 2022
Aiming at the mining disaster of a thick hard roof, based on the analysis of the mining instability influence of the thick hard roof, this study constructs the mining bearing mechanical model of the thick hard roof by using mechanical theory and obtains ...
Qingwei Bu, Qingwei Bu, Min Tu, Xiangyang Zhang, Ming Zhang, Qingchong Zhao   +5 more
doaj   +1 more source

Theory and technical system of control of far-near field hard roofs from ground and underground in a large space stope

Meitan xuebao, 2023
The stope space, after mining an extra-thick coal seam with hard roofs, is large, and its law of mining pressure is complex. The mechanism of strong mine pressure action for this stope is unclear, and there is a lack of multi-point control technology ...
Bin YU, Yang TAI, Tiejun KUANG, Rui GAO, Jingxuan YANG, Binwei XIA, Weibing ZHU, Yong LI   +7 more
doaj   +1 more source

Ground fracturing pre-control technology for potential mine seismic risk of thick and hard roof

Meitan kexue jishu, 2023
Mines with thick and hard roof face high risks of mine seismic activities and mine pressure during mining, which easily leads to dynamic disasters in mines.
Shuwen WANG, Baoyan ZHI, Taotao DU, Guangyu YANG, Chuang LU, Yongxue XIA   +5 more
doaj   +1 more source

Experimental Study on Presplitting Blasting of Roof Cutting Along Goaf with Thick and Hard Roof Plate

IOP Conference Series: Earth and Environmental Science, 2021
Abstract In order to explore the reasonable blasting parameters of the gob-side entry retaining technology under the specific conditions of thick and hard roof, and realize successful roof cutting and safe roadway retaining, the thick and hard roof of the XV1306 working face in the first panel of Yixin Coal Mine is used as the research ...
Jianquan Tang, Hongliang Liu, Anfa Chen
openaire   +1 more source