深部隐伏裂隙带位置对工作面底板突水的影响  

On the Influence of the Location of Deep Concealed Fracture Zone on Water Inrush from Floor of Working Face

作　　者：王国举 赵立松 周泽 卢钢 刘钰鑫 WANG Guoju;ZHAO Lisong;ZHOU Ze;LU Gang;LIU Yuxing(Hebei Coal Science Research Institute Co.,Ltd.,Xingtai 054000,China;Mine Microseismic Key Laboratory of Hebei Province,Xingtai 054000,China;School of Mining Engineering,Guizhou Institute of Technology,Guiyang 550001,China;Xingdong Coal Mine,Jizhong Energy Group Corporation Ltd.,Xingtai 054000,China)

机构地区：[1]河北煤炭科学研究院有限公司,河北邢台054000 [2]河北省矿井微震重点实验室,河北邢台054000 [3]贵州理工学院矿业工程学院,贵州贵阳550001 [4]冀中能源集团有限责任公司邢东矿,河北邢台054000

出　　处：《矿业工程研究》2024年第2期29-34,共6页Mineral Engineering Research

基　　金：邢台市重点研发计划资助项目(2023ZC319);贵州省科技支撑计划资助项目(黔科合支撑[2021]一般347);贵州省普通高等学校青年科技人才成长资助项目(黔教合KY字[2021]258);贵州理工学院高层次人才科研启动经费资助项目(XJGC20190931)。

摘　　要：采场底板的隐伏构造是引发工作面突水灾害的关键因素.本文以邢东矿2126工作面为案例,深入研究在深部开采过程中,底板采动破坏特征与隐伏裂隙带之间的相互作用机制.通过构建力学模型,并借助数值软件,模拟采动过程中隐伏裂隙带在不同空间位置上的采动应力演化特征,以及底板的破坏特征,并对比与分析.研究结果表明:隐伏裂隙带空间位置及形态是底板发生突水的关键因素;隐伏裂隙带与煤层垂距在80 m范围内时,隐伏裂隙带应力释放速度较快,隐伏裂隙带易受煤层开采影响;当其垂距增加至120 m时,隐伏裂隙带受工作面开采扰动较小;但在隐伏裂隙带与煤层垂直在120 m时,工作面推过裂隙带之后,隐伏裂隙带应力值开始调整释放,和底板应力降低区域沟通,条件具备的情况下,易发生滞后突水.The concealed structure of stope floor is an important factor causing water inrush in working face.Taking 2125 working face of Xingdong Coal Mine as an example,this paper studies the interaction between floor mining failure characteristics and hidden fracture zones in deep mining process,establishes a mechanical model,simulates and compares the evolution characteristics of mining stress and floor failure characteristics in different spatial locations of hidden fracture zones in mining process with numerical software.Results show that the spatial location and shape of the concealed fracture zone are the key factors of water inrush.When the vertical distance between the concealed fracture zone and coal seam is within 80 m,the stress release speed of the concealed fracture zone is faster,and the concealed fracture zone is easy to be affected by coal seam mining.When the vertical distance increases to 120 m,the hidden fracture zone is less disturbed by the mining face.However,when the concealed fracture zone is perpendicular to the coal seam at 120 m,after the working face pushes through the fracture zone,the stress value of the concealed fracture zone begins to adjust and release,and communicates with the stress reduction area of the floor.When conditions are available,lagging water inrush is easy to occur,so the floor rock strata should be reinforced by grouting in time.

关 键 词：深部开采 底板破坏 底板突水 

分 类 号：TD325[矿业工程—矿井建设]