Results 11 to 20 of about 16,961 (284)
Application of pre-splitting blasting roof-cutting pressure relief technology for roadway protection under hard roof. [PDF]
Sci RepThe 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.
Li Y, Chang G, Hu D, Song W.
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Influence mechanism of thick hard layer on fracture and energy release characteristics of composite roof [PDF]
Scientific ReportsInvestigating 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 +5 more
doaj +2 more sources
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesThe mining of deep large-height longwall faces leads to frequent occurrences of strong ground pressure, at the same time, there are multi-thick hard rock strata in the roof of the longwall face, therefore, it is important to master the fracture ...
Yangbo Lu +4 more
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Weakening effects of hydraulic fracture in hard roof under the influence of stress arch
International Journal of Mining Science and Technology, 2018 For the problem of hydraulic fracture propagation when weakening the hard roof in fully mechanized top-coal caving stope of ultra-thick coal seam, based on the stress arch theory and the fracture mechanics, a two-dimensional model for hydraulic fracture ...
Binwei Xia, Xuan Zhang
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Evolution of broken structure of hard thick roof and analysis of impact hazard area
Meikuang AnquanAiming at the influence of hard and thick roof fracture and structural evolution on the impact of working face, taking the hard and thick roof condition of 63 upper 05 working face in Dongtan Coal Mine as the engineering background, the critical ...
Pengfei LYU +4 more
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Shock and Vibration, 2020 The movement and destruction of the hard roof in a stope is an important reason for the occurrence of strong ground pressure disasters at the working face.
Hongfei Duan, Lijuan Zhao
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The study of mechanical properties and fracture evolution of coal-rock masses under hard roof-soft floor conditions. [PDF]
Sci RepAs the depth of coal mining in China continues to increase, the fracturing of coal rock masses has an increasingly complex impact on the surrounding rock roadways.
Li J +5 more
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Energy Exploration & Exploitation, 2020 After mining the upper-goaf side, large coal pillars and part of hard roof exposed above the pillars remain. The hard roof can significantly deform the roadway by transferring high stress through coal pillars to the roadway. This paper reports the use of
Jiangwei Liu, Changyou Liu, Xuehua Li
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Characteristics of mine pressure and roof disaster prevention and control technology on hard and thick roof of working face [PDF]
Meitan kexue jishuMine pressure appears extremely strong during mining in hard and thick roof working faces. The prevention and control of this type of roof disaster has always been a problem that has plagued the safe and efficient production of working faces in my ...
Gang XU +8 more
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Advances in Civil EngineeringOne of the primary threats to coal mine safety production is the sudden extensive fracturing and collapse of thick and hard roof strata. A range of uniaxial compression experiments with acoustic emission (AE) monitoring was performed for studying the ...
Dongdong Qin, Zechao Chang, Ze Xia
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