Dynamic response of surrounding rock of goaf group under seismic loading

doi:10.16265/j.cnki.issn1003-3033.2018.11.018

Abstract

Abstract: To research the dynamic response characteristics of goaf surroundings and pillars under seismic loading, dynamic response process of goaf group is simulated by FLAC^3D in this paper. Based on the maximum and minimum principal stress of every step obtained during seismic action, the variation characteristics of the shear and tension failure stress for the roof, the floor, pillar and side wall around goaf group are analyzed. The results demonstrate that during the seismic action, the central region stress of goaf is most stable and the stress fluctuation become larger away from the central region, after the seismic action, the shear resistances of the goaf roof and floor slightly reduce and the tensile resistances obviously decrease. At the same time, the tensile failure area of the side wall becomes larger.

Key words: goaf group, seismic response, FLAC^3D, shear failure, tension failure, stability

CLC Number:

X913.4
TU45

ZHOU Zilong, LIU Fu, WANG Haiquan, RUI Yichao. Dynamic response of surrounding rock of goaf group under seismic loading[J]. China Safety Science Journal, 2018, 28(11): 110-115.

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