基于FLAC^(3D)数值模拟的回风平巷变形破坏机理分析  

Deformation and failure mechanism of return air roadway of 2208 working face of Jining Coal Industry

作　　者：杨鹏 YANG Peng(Jining Coal Industry Co.Ltd.,Shanxi Huajin Mining Group,Linfen 042108,China)

机构地区：[1]山西华晋集团吉宁煤业有限责任公司,山西临汾042108

出　　处：《煤矿现代化》2025年第1期1-6,共6页Coal Mine Modernization

摘　　要：随着开采的逐步深入,山西华晋吉宁煤业逐步面临着高应力环境下回采巷道掘进难以及支护难等问题。以该矿2208回风平巷为研究对象,借助FLAC^(3D)通过数值模拟的方式用控制变量法分别从地质条件、支护方式、施工工艺这3个方面分析对巷道围岩变形量(顶板下沉量、底板鼓起量,侧帮变形量)、破坏区深度、破坏体积的影响。研究发现断层地质构造对回采巷道及周围煤岩体稳定性影响显著,应当在回采巷道揭露断层地质构造时加强对回采巷道的支护工作。锚杆支护能够有效改善巷道围岩变形以及应当采用及时支护方式对回采巷道进行加固,并尽量减少顶板暴露面积,从而最大限度地维护巷道围岩稳定。With the gradual deepening of mining,Shanxi Huajin Jining Coal Industry is gradually facing the problems of difficult tunneling and supporting of mining roadway under high stress environment.Taking the 2208 return air roadway of the mine as the research object,with the help of FLAC^(3D),the influence of the roadway on the deformation of the surrounding rock(roof subsidence,floor bulging,side deformation),the depth of the failure zone and the failure volume of the roadway was analyzed from three aspects:geological conditions,support methods and construction technology.It is found that the fault geological structure has a significant impact on the stability of the mining roadway and the surrounding coal and rock mass,and the support of the mining roadway should be strengthened when the fault geological structure is exposed in the mining roadway,the bolt support can effectively improve the deformation of the surrounding rock of the roadway,and the timely support method should be used to strengthen the mining roadway,and minimize the exposed area of the roof,so as to maintain the stability of the surrounding rock of the roadway to the greatest extent.

关 键 词：支护 控制变量法 巷道稳定性 高应力环境 

分 类 号：TD323[矿业工程—矿井建设]