Citation

Feng Z, Guo W. China Saf. Sci. J. 2019; 29(11): 171-176.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.11.027

PMID

unavailable

Abstract

In order to reduce impact and damage of coal mining on surface structures, with 5304 working face of Sihe Coal Mine, Jincheng Coal Mining as a research object, theoretical analysis and numerical simulation were conducted to analyze control of working face's mining influence by hydraulic fracturing in key strata. Then collapse mode of overburden and surface subsidence laws of key strata before and after hydraulic fracturing were studied, and its control mechanism on surface subsidence was revealed. The results show that after hydraulic fracturing, the movement mode is transformed from bending subsidence to sliding shear drop along fracturing zone. As surface subsidence curve in the hydraulic fracturing zone becomes steep, subsidence value will increase while influence scope of surface mining on fracturing side decreases. © 2019 China Safety Science Journal. All rights reserved.

Language: zh