充填弱化坚硬覆岩冲击地压灾害机制研究

doi:10.13722/j.cnki.jrme.2022.1178

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Abstract As one of the main factors that induce rock burst，hard overburden seriously threatens the safe and efficient mining of coal mines. This paper analyzes the catastrophic process of rock burst disaster of hard overburden and the key controls on the energy of the key stratum inducing rock burst，gives the determination method of the key stratum induced rock burst，and proposes the method of goaf backfilling and grouting bed separation so that weakening the catastrophic energy of the key stratum inducing rock burst. Taking the mining geological conditions of two typical coal mines under the hard overburden rock as a background，the deformation law of the key stratum induced rock burst and the evolution law of the disaster energy under different backfilling conditions are studied，the mechanisms of backfilling to weaken the disaster-causing energy effect of hard overburden rocks is revealed and the engineering design method is given. Finally，it was verified by field measurement analysis. The research results show that the energy accumulation，release and transfer caused by the deformation and rupture of the key stratum inducing rock burst formed by the hard-overlying rock are the key to inducing dynamic disasters. Goaf backfilling and grouting bed separation can effectively control the deformation of the key stratum inducing rock burst，reduce the accumulation degree and release speed of the disaster-causing energy，meanwhile，the backfilling body can absorb part of the energy and reduce the transmission efficiency of the disaster-causing energy，thereby realizing the weakness of dynamic disasters caused by hard overburden.

Key words： mining engineering rock burst disaster backfill method hard overburden key stratum inducing rock burst catastrophic energy

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	Articles by authors
	ZHOU Nan1
	2
	XU Jianfei1
	2
	ZHANG Jixiong1
	2
	MA Dan1
	2
	LI Zejun1
	2
	YAO Yinan1
	2

Cite this article:

ZHOU Nan1,2,XU Jianfei1, et al. Study on the weakening mechanism of hard overburden rock burst disaster by backfilling[J]. , 2023, 42(10): 2412-2426.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1178 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I10/2412

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