地震作用下采空区群围岩动力响应特征研究

doi:10.16265/j.cnki.issn1003-3033.2018.11.018

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (11): 110-115.doi: 10.16265/j.cnki.issn1003-3033.2018.11.018

地震作用下采空区群围岩动力响应特征研究

周子龙教授, 刘富, 王海泉, 芮艺超

中南大学资源与安全工程学院,湖南长沙 410083

收稿日期:2018-08-20 修回日期:2018-10-18 发布日期:2020-11-25
作者简介:周子龙 (1979—),男,河南南阳人,博士,教授,主要从事金属与非金属矿山开采、岩土工程灾害防治等方面的研究。E-mail:zlzhou@csu.edu.cn。
基金资助:
国家基础研究发展计划项目(2015CB060200);国家自然科学基金资助(41772313);中南大学自由探索项目(502211816)。

Dynamic response of surrounding rock of goaf group under seismic loading

ZHOU Zilong, LIU Fu, WANG Haiquan, RUI Yichao

School of Resources and Safety Engineering, Central South University, Changsha Hunan 410083, China

Received:2018-08-20 Revised:2018-10-18 Published:2020-11-25

摘要/Abstract

摘要： 为探究地震对采空区围岩及矿柱的动力影响,利用FLAC^3D软件模拟地震作用下采空区群围岩的动力响应过程,通过获取围岩在地震作用过程中每一时步的最大、最小主应力,分析地震作用前后采空区顶板、底板、矿柱及边墙的剪切屈服和张拉屈服应力值的变化特征。结果表明:地震过程中,空区中心区域应力稳定性最好,远离中心区域应力波动变大;地震后,空区顶板、底板的抗剪切能力稍有下降,抗拉能力显著下降,边墙的张拉破坏面积变大。

关键词: 采空区群, 地震响应, FLAC^3D, 剪切屈服, 张拉屈服, 稳定性

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

中图分类号:

X913.4
TU45

周子龙, 刘富, 王海泉, 芮艺超. 地震作用下采空区群围岩动力响应特征研究[J]. 中国安全科学学报, 2018, 28(11): 110-115.

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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地震作用下采空区群围岩动力响应特征研究

Dynamic response of surrounding rock of goaf group under seismic loading

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