顶板冒落前后微震活动性参数分析及预警

doi:10.13722/j.cnki.jrme.2015.0928

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Abstract The studying on parameters of microseismic activity play an important role in rock mass stability prediction. The change pre- and post Roof Caving of microseismic activity parameters including b value，Energy Index，Schmidt number and cumulative apparent volume were discussed in this article. The author puts forward the concept of“the ratio of energy index and cumulative apparent volume(EEI)”and “the ratio of Schmidt number and cumulative apparent volume(EScs)”. The EEI and EScs could be used as the parameters of rock mass stability prediction. Based on the research of b value and number of events，the general pattern of microseismic monitor forecasting were built. The pattern were used in rock mass stability prediction in Yongshaba mine，and the results showed that：the b value had the function of risk warning because it first increase then decrease pre- and post roof caving. The decrease of energy index and Schmidt number with the increase of cumulative apparent volume meant sudden release of accumulated strain energy in rock mass. The phenomenon indicated deterioration of rock stability. The early warning period that comprehensive determined by this microseismic monitoring forecasting method was more suitable for mine，and reserved response time for workers to avoid risk.

Key words： mining engineering microseismicity monitoring roof caving b value energy index Schmidt number cumulative apparent volume early warning

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	Articles by authors
	ZHANG Chuxuan1
	2
	LI Xibing1
	DONG Longjun1
	MA Ju1
	HUANG Linqi1

Cite this article:

ZHANG Chuxuan1,2,LI Xibing1, et al. Analysis of microseismic activity parameters pre- and post roof caving and early warning[J]. , 2016, 35(S1): 3214-3221.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0928 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3214

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