围岩均匀性对近采空区巷道稳定性影响的数值模拟研究  

Numerical Simulation Study on Influence of Surrounding Rock's Uniformity upon Stability of Roadway near Gob Area

作　　者：谭志宏[1] 贾天让[1] 韩正林[1] 闫江伟[1] 

机构地区：[1]河南理工大学瓦斯地质研究所,河南焦作454000

出　　处：《矿业安全与环保》2011年第3期23-25,1,共3页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51004044);河南理工大学博士基金项目(B2009-57)

摘　　要：近采空区巷道的稳定性是矿山开采中的一个重要安全问题,而围岩的均匀性是影响巷道稳定性的一个重要因素。采用RFPA强度折减法进行了围岩均匀性对近采空区巷道稳定性影响的数值模拟分析,研究表明:在其他条件相同时,随着围岩均匀程度的提高,巷道的稳定性得到提高;位移较大的地方主要是在巷道和采空区顶部所形成的拱形区域内,以及巷道和采空区的侧墙;围岩均匀性提高,巷道与采空区间的间柱位移量减小,间柱的破坏程度减轻;间柱部分裂纹是由两侧开始,向内部扩展,最后贯通。The stability of roadway near gob is an important safety problem in coal mining,and the uniformity of the surrounding rock is a major factor affecting the stability of the roadway.In this paper,numerical simulation analysis was conducted on the influence of the uniformity of the surrounding rock upon the stability of the roadway near the gob by using RFPA.The research results showed that when other conditions were the same,the stability of the roadway increased with the increase of the uniformity of its surrounding rock;larger displacements were mainly distributed in an arched area on the top of the roadway and gob and in the side wall of them;when the uniformity of the surrounding rock increased,the displacement of the intermediate pillar between the roadway and gob reduced and the damage of the intermediate pillar was eased;some cracks on the intermediate pillar first appeared on its two sides,then expanded to its inside and finnally ran through the pillar.

关 键 词：采空区 围岩均匀性 巷道稳定性 数值模拟 

分 类 号：TD322.4[矿业工程—矿井建设]