煤柱应力区的巷道破坏特征及控制技术研究  

Research on Damage Characteristics of Roadway in Coal Pillar Stress Zone and Control Technology

作　　者：张开昶 ZHANG Kaichang(Longtai Mine of Shanxi Jizhong Energy Group Mining Co.,Ltd.,Changzhi,Shanxi 046500,China)

机构地区：[1]山西冀中能源集团矿业有限责任公司隆泰矿,山西长治046500

出　　处：《自动化应用》2024年第4期163-165,共3页Automation Application

摘　　要：在连续煤层开采过程中,上部采空区残余煤柱常导致下伏长壁开采工作面产生强应力,应力积累会造成回采巷道严重破坏变形。为此,以隆泰煤矿巷道的应力破坏变形过程为例进行了研究,分析了采矿巷道围岩的破坏变形过程,运用FLAC3D模拟了应力分布特征以及巷道周围垂直应力和破坏带的演化过程。结果表明,支护煤柱以下工作阻力普遍较高,平均值为9726.6kN,采空区以下普遍较低,平均值为7 655.5 k N;受影响,回采巷道在距工作面30 m以外变形破坏程度相对中等,在距9+10号工作面30 m以内变形破坏程度相对严重;基于残留煤柱集中应力分布特征,采用水力压裂控制其力学特性,改善了回采巷道应力环境。In the process of continuous coal seam mining,the residual coal pillar in the upper goaf often leads to strong stress in the underlying longwall mining face,and the stress accumulation will cause serious damage and deformation of the mining roadway.Therefore,the stress failure deformation process of Longtai Coal Mine roadway is studied as an example.The failure deformation process of mining roadway surrounding rock is analyzed,and the stress distribution characteristics and the evolution process of vertical stress and failure zone around roadway are simulated by FLAC3D.The results show that the working resistance below the coal pillar is generally higher,with an average value of 9726.6 kN,and below the goaf is generally lower,with an average value of 7655.5 kN.The deformation and failure degree of the affected mining roadway is relatively moderate outside 30 m from the working face,and relatively serious within 30 m from the working face No.9+10.Based on the concentrated stress distribution characteristics of residual coal pillar,hydraulic fracturing is used to control its mechanical characteristics and improve the stress environment of mining roadway.

关 键 词：煤柱 应力区 巷道破坏变形 水力压裂 

分 类 号：TD353[矿业工程—矿井建设]