非均匀应力下软岩巷道围岩应力分布与控制技术  

Stress Distribution Control Technology Surrounding Rock Soft Rock Roadway Under Non-Uniform Stress

作　　者：李晓 吴海[1,2,3] 褚文强 刘飞飞[4] 陈海荣 刘文毅 LI Xiao;WU Hai;CHU Wenqiang;LIU Feifei;CHEN Hairong;LIU Wenyi(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,China;Yunnan Jiada Coal Industry Co.,Ltd.,Wantian Group,Fuyuan 655502,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [3]湖南科技大学南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201 [4]云南湾田集团戛达煤业有限公司,云南富源655502

出　　处：《矿业工程研究》2022年第2期9-16,共8页Mineral Engineering Research

摘　　要：针对戛达煤矿多条巷道受到起伏地形产生的非均匀应力导致巷道顶板下沉、底板上鼓等问题.文章在地质调查和三维建模反演的基础上,对戛达煤矿的埋藏条件进行建模分析,对发生大变形的1766南运巷和110904风巷建立FLAC_(3D)地质模型,进行数值模拟分析.数值分析结果表明,在受到起伏地表产生的非均匀应力和临近采空区侧向压力的双重影响下,巷道围岩已经进入塑性状态.基于巷道围岩的特性及破坏特征,提出了以“中空注浆锚索”为主体,以“注浆锚杆+金属网+喷射砼”为辅助的综合控制技术方案来确保巷道的长期稳定.数值结果表明,巷道围岩采用支护方案后,顶底板下沉、两帮变形量仅为未支护时的40%,保障了巷道的安全稳定.In response to the non-uniform stresses generated by the undulating terrain in a number of roadways in the Jada Coal Mine,the top plate of the roadway is sinking and the bottom plate is bulging.Based on the geological survey and 3D modeling inversion,the paper analyzes the burial conditions of Jada Coal Mine and establishes FLAC_(3D) geological models of 1766 South Runway and 110904 Windway,where large deformations occur,for numerical simulation analysis.The results of numerical analysis show that the tunnel surrounding rock has entered a plastic state under the influence of the non-uniform stresses generated by the undulating surface and the lateral pressure of the adjacent mining area.Based on the characteristics and damage features of the tunnel surrounding rock,the comprehensive control technology plan of“hollow grouting anchor cable”as the main body and“grouting anchor+metal mesh+spray concrete”as the auxiliary is proposed to ensure the long-term stability of the tunnel.The numerical results show that the top and bottom slab sinking and the deformation of both sides of the roadway are only 40%of the unsupported slope after the adoption of the support scheme.

关 键 词：非均匀应力 软岩巷道 采空区 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]