Comprehensive analysis control effect of faults on the height of fractured water-conducting zone in longwall mining

Xianhui Wang, Shuyun Zhu (), Haitao Yu and Yanxin Liu
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Xianhui Wang: China University of Mining and Technology
Shuyun Zhu: China University of Mining and Technology
Haitao Yu: China University of Mining and Technology
Yanxin Liu: Baodian Coal Mine, Yanzhou Coal Mining Company

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2021, vol. 108, issue 2, No 33, 2143-2165

Abstract: Abstract In order to examine the height of a fractured water-conducting zone due to the presence of a fault, a typical working face in the Baodian Coal Mine which is located in the Yanzhou Coalfield of northeastern China is examined as a case study. Two subsurface conditions with and without a fault are considered. In this study, equations are developed to calculate the maximum span of the unsupported roof with and without the presence of a fault. Numerical models are used to examine the changes in stresses and the development of a plastic zone at different stages of mining. A comparison of the results based on theoretical analysis and numerical model shows that the height of the fractured water-conducting zone increases significantly with the presence of a fault. The height of the fractured water-conducting zone is about 1.50 times higher than the case without a fault. The results provide important insight into the prevention and control of water inrush in mines with thick and loose deposits and a thin bedrock.

Keywords: Fault; Height of fractured water-conducting zone; Overburden failure model; Theoretical calculation; Numerical simulation (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s11069-021-04772-z

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