采动影响下全煤回采巷道围岩稳定性模拟研究  

Simulation study on stability of surrounding rock in full coal mining gateway under the influence of mining movement

作　　者：娄杰 张迎春 温慧 杨玉顺 韦四江[3] Lou Jie;Zhang Yingchun;Wen Hui;Yang Yushun;Wei Sijiang(Qipanjing Coal Mine,Mengxi Coal Chemical Industry Co.,Ltd.,CHN Energy,Wuhai 016000,China;School of Architecture and Engineering,Huaiyin Institute of Technology,Huai′an 223001,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]国能蒙西煤化工股份有限公司棋盘井煤矿,内蒙古乌海016000 [2]淮阴工学院建筑工程学院,江苏淮安223001 [3]河南理工大学能源科学与工程学院,河南焦作454000

出　　处：《能源与环保》2023年第9期257-265,共9页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：2021年度“淮上英才计划”驻淮高校优秀博士项目;淮安市自然科学研究项目(HAB202154)。

摘　　要：采用FLAC 3D数值模拟软件,研究了采动影响下全煤回采巷道围岩稳定性,结果表明,回采巷道开挖后周边围岩体应力释放并向深部转移,在回采巷道周边出现应力集中现象。随着采动应力系数的增大,回采巷道周边围岩体垂直应力呈线性增加,且垂直应力集中位置距巷道中心呈线性增大;回采巷道开挖后顶板下沉、底板鼓起,随着采动应力系数的增大,回采巷道顶底板及两帮变形量均呈指数函数增大;回采巷道开挖后,周边围岩体表现出拉伸破坏和剪切破坏,回采巷道周边塑性区面积随采动应力系数的增加逐渐增大,且采动应力系数大于2.5时塑性区呈“蝶形”分布。In this paper,FLAC 3D numerical simulation software was used to study the surrounding rock stability of the full coal mining roadway under the influence of mining.The results show that the surrounding rock stress is released and transferred to the deep after the excavation of the mining roadway,and the stress concentration phenomenon occurs around the mining roadway.With the increase of mining-induced stress coefficient,the vertical stress of surrounding rock mass increases linearly,and the location of the vertical stress concentration increases linearly from the roadway center.After excavation of the mining roadway,the roof sinks and the floor bulges.With the increase of the mining-induced stress coefficient,the deformation of the roof,floor and two sides of the mining roadway increases exponentially.After excavation of the mining roadway,the surrounding rock body exhibits tensile and shear failure,and the plastic zone area around the mining roadway gradually increases with the increase of the mining-induced stress coefficient,and the plastic zone presents a"butterfly"distribution when the mining-induced stress coefficient is greater than 2.5.

关 键 词：全煤巷道 采动影响 数值模拟 围岩稳定性 

分 类 号：TD323[矿业工程—矿井建设]