动力扰动下含软弱夹层巷道围岩力学响应特性

doi:10.3981/j.issn.1000-7857.2014.21.009

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Abstract: To study the influence of weak interlayers on the stability of roadway surrounding rocks under dynamic disturbance, the finite element software Abaqus was used to numerically analyze the mechanical response of surrounding rocks of Dongguashan copper mine roadway under blasting, and an optimized support scheme was proposed. The results show that the vertical stress of roadway vault and bottom amplitude fluctuation of the roadway with weak interlayers are higher than those of the roadway without weak interlayers, and the bottom changed apparently, while the horizontal stress fluctuation amplitude of the roadway with weak interlayers is lower than that of the roadway with no weak interlayers. The deformation of the vault and two sides of the roadway is larger than that of the bottom, and roadway surrounding rocks without weak interlayers apparently have larger deformation than those with weak interlayers, and have larger deformation rate. The farther away from the explosion source, the smaller the stress and deformation of roadway surrounding rocks, but the change is not apparent, which tends to be stabilized after about 0.15 s under dynamic disturbance. Based on the investigation of Dongguashan copper mine, the destruction form of surrounding rocks is roof caving. Thus an optimized support scheme was proposed, with which the deformation of surrounding rocks is about 1/3 of that with no support, effectively reducing the deformation of roadway surrounding rocks.

Key words： dynamic disturbance weak interlayer mechanical response support optimization numerical simulation

Received: 27 March 2014

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	TANG Lizhong
	GAO Longhua
	WANG Chun
	JIANG Feng

Cite this article:

TANG Lizhong,GAO Longhua,WANG Chun, et al. Mechanical Response Features of Roadway Surrounding Rock with Weak Interlayer Under Dynamic Disturbance[J]. journal1, 2014, 32(21): 56-61.

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http://www.kjdb.org/EN/10.3981/j.issn.1000-7857.2014.21.009 OR http://www.kjdb.org/EN/Y2014/V32/I21/56

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