“两硬”条件正断层影响下的冲击地压发生规律研究

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Abstract The fault is an important geological structure that can induce coal bumps. A field investigation was taken in the 8935 working face in Xinzhouyao coal mine for the mechanism of coal bumps induced by fault activation. There was a series of serious coal bumps in the past 4 months. The features of coal bumps influenced by normal fault were studied through the analysis of these cases obtaining characteristics of electromagnetic radiation and microseismic before and after the coal bump. The fault has obvious influence on frequency and intensity of coal bump，which is reflected in two aspects：it has changed the physico-mechanical properties of coal and rock，and made the tectonic stress field become complicated. Seismic often occurred in the range of 230–360 m in front of the fault and the impact location is 0–60 m ahead of mining face. The impact danger is approaching when the curve of electromagnetic radiation energy and the number of pulses present the saddle form，and then the probability of coal bump is very high. Microseismic monitoring shows that the occurred energy of coal bump is between 105–106 J magnitude. There are impact dangers when microseismic with more than 105 J of the energy continues to occur and its energy has great fluctuation.

Key words： mining engineering rock burst fault electromagnetic radiation microseismic

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	Articles by authors
	JIANG Yaodong1
	2
	WANG Tao1
	3
	CHEN Tao4
	BAI Xingping4
	XIE Shuaitao2

Cite this article:

JIANG Yaodong1,2,WANG Tao1, et al. FEATURES OF COAL BUMPS INFLUENCED BY NORMAL FAULTS IN COAL MINING WITH HARD ROOF AND HARD COAL[J]. , 2013, 32(s2): 3712-3718.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3712

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