降雨入渗对浅埋采场稳定性影响的微震监测分析

doi:10.13722/j.cnki.jrme.2015.1153

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Abstract The geological background，mining background and characteristics of ground pressure of Xianglushan Tungsten mine were briefly described. Aiming at the influence of rainfall permeation on stope stability since 2012，a typical case of stope collapse and the law of ground pressure activity influenced by rainfall permeation were quantitatively analyzed by micriseismic monitoring，the mechanism of stope collapse induced by rainfall permeation was briefly analyzed. The results show that，under the influence of rainfall permeation，microseismic events significantly increased，and the events of the sensors nearby the collapse exceed early warning value before stope collapse. A large-scale stress transfer and distribution appears after the stope collapse，and the stress transfers to perimeter of the ore body arch after stope collapse. A lot of rock fractures and collapses appear in the process of stress redistribution，and the rock mass tends to be stable after nearly two months of stress adjustment. The microseismic event level changes with the rainfall as a whole，and will lag behind. This means the ground pressure activity increases with the increase of rainfall，rainfall permeation is an important causes of stope instability. At last，the prevention and control measures of ground pressure disasters were put forward. This study has important significances for the quantitative assessment of the influence of rainfall permeation on shallow stope stability，and ensuring the safety in underground production.

Key words： mining engineering rainfall infiltration microseismic monitoring technology stope stability monitoring and early warning quantitative evaluation

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	Articles by authors
	PENG Fuhua1
	2
	LI Shulin3
	LENG Xiuning4
	CHENG Chao4
	LIU Dongchun4

Cite this article:

PENG Fuhua1,2,LI Shulin3, et al. Study of influence of rainfall permeation on shallow stope stability by microseismic monitoring[J]. , 2016, 35(S2): 4154-4163.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1153 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/4154

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