构造作用下弱胶结泥岩巷道稳定性研究  

Stability of Roadway with Weakly Consolidated Soft Rock Under Tectonic Action

作　　者：赵维生 梁维 许猛堂 刘彬 ZHAO Weisheng;LIANG Wei;XU Mengtang;LIU Bin(Institute of Mining Engineering,Guizhou Institute of Technology,Guiyang 550003,China;Chongqing Research Institute Co.,Ltd,China Coal Technology and Engineering Group,Chongqing 200030,China)

机构地区：[1]贵州理工学院矿业工程学院,贵州贵阳550003 [2]中煤科工集团重庆设计研究院有限公司,重庆400016

出　　处：《矿业研究与开发》2020年第6期94-99,共6页Mining Research and Development

基　　金：贵州省科技计划项目(黔科合基础[2018]1061);贵州省教育厅青年科技人才成长项目(黔教合KY字[2017]219).

摘　　要：针对构造岩作用下弱胶结泥岩巷道变形大、难控制等特点,以内蒙古西一五间房煤矿为研究背景,根据弱胶结泥的实际埋深(300 m),用侧压系数表示构造应力状态,建立了5组不同构造应力作用下的巷道开挖数值模型,分析了不同地质构造作用下弱胶结围岩巷道变形和塑性区演化规律。研究结果表明:当侧压系数小于1时,围岩塑性区主要发生在巷道两帮,呈蝶形分布,最大变形发生在顶底板;当侧压系数增加到1后,围岩塑性区近似呈圆形分布,随侧压系数继续增加,围岩塑性区主要发生在顶底板上,呈漏斗型分布,最大变形向巷道两帮转移。According to the characteristics of roadway with weakly consolidated soft rock under the action of tectonic rock,such as large deformation and difficult to control,Xiyi Wujianfang Coal Mine in Inner Mongolia was taken as the research background.According to the actual buried depth of weakly consolidated soft rock(300 m),the lateral pressure coefficient was used to express the state of structural stress.Five groups of numerical models of roadway excavation under different structural stresses were established,and the deformation and evolution law of plastic zone of roadway with weakly consolidated soft rock under different geological structures were analyzed.The results show that when the lateral pressure coefficient is less than 1,the plastic zone of surrounding rock mainly occurs at the two sides of the roadway,which is butterfly distributed,and the maximum deformation occurs at the roof and floor.When the lateral pressure coefficient increases to 1,the plastic zone of surrounding rock approximately distributes as a circle.With the increase of the lateral pressure coefficient,the plastic zone of surrounding rock mainly occurs at the roof and floor,which distributes as a funnel,and the maximum deformation transfers to the two sides of the roadway.

关 键 词：构造作用 弱胶结泥岩 巷道稳定性 数值模拟 

分 类 号：TD263[矿业工程—矿井建设] TD322.4