逆断层上下盘开采扰动下断层活化响应模拟研究  

Simulation study on fault activation response under mining disturbance of hanging-wall and foot-wall of reverse fault

作　　者：刘雨生 孟祥瑞[1] 程详[2,3] 赵光明[1] 顾清恒 王艳芬[4] 朱世奎 LIU Yusheng;MENG Xiangrui;CHENG Xiang;ZHAO Guangming;GU Qingheng;WANG Yanfen;ZHU Shikui(School of Mining Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine,Anhui University of Science and Technology,Huainan Anhui 232001,China;Post-Doctoral Research Station,Huainan Mining Industry(Group)Co.,Ltd.,Huainan Anhui 232001,China;School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;Huaibei Mining Industry Co.,Ltd.,Huaibei Anhui 235000,China)

机构地区：[1]安徽理工大学矿业工程学院,安徽淮南232001 [2]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001 [3]淮南矿业(集团)有限责任公司博士后科研工作站,安徽淮南232001 [4]安徽理工大学材料科学与工程学院,安徽淮南232001 [5]淮北矿业股份有限公司,安徽淮北235000

出　　处：《中国安全生产科学技术》2024年第8期33-41,共9页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(52374074);国家自然科学基金青年科学基金项目(5220408);安徽省科技重大专项项目(202203a07020011)。

摘　　要：为探究煤层不同开采方式下逆断层应力场、位移场演化规律和断层活化规律,通过数值模拟分析逆断层地质条件下进行上盘开采和下盘开采时断层处的正应力和剪应力演化规律、断层活化过程以及断层和覆岩的位移场变化特征。研究结果表明:随工作面逐渐靠近断层,断层上部的正应力逐渐降低、剪应力逐渐升高,断层下方的正应力逐渐升高、剪应力逐渐降低,正应力和剪应力升高或降低的速率随工作面与断层距离减小而增加;当工作面与断层距离在80 m和40 m时,断层处正应力和剪应力发生异于前期应力规律性的变化,出现大幅度增长和降低的情况;相对于上盘开采,下盘开采时断层更易受煤层开采扰动而发生活化,且活化程度和范围均大于上盘开采;随工作面不断向断层靠近,下盘开采时采空区上覆岩层下沉量和断层两侧岩体相对位移量均明显大于上盘开采。研究结果对煤层开采遇断层时围岩治理和防灾减灾具有一定科学指导意义。In order to explore the stress field,displacement field evolution law and fault activation law of reverse faults under different mining methods of coal seams,the evolution law of normal stress and shear stress at faults,fault activation process,and displacement field variation characteristics of faults and overlying strata during the hanging-wall mining and foot-wall mining under reverse fault geological conditions were analyzed by numerical simulation.The results show that with the working face gradually approaching the fault,the normal stress in the upper part of fault gradually decreases and the shear stress gradually increases,while the normal stress in the lower part of fault gradually increases and the shear stress gradually decreases.The rate of increase or decrease of normal stress and shear stress increases with the decrease of the distance between working face and fault.When the distance between working face and fault is 80 m and 40 m,the normal stress and shear stress at the fault are different from the regular change of previous stress,and there is a large increase and decrease.Compared with the hanging-wall mining,the fault in the foot-wall mining is more easily activated by the disturbance of coal seam mining,and the degree and range of activation are greater than those in the hanging-wall mining.The research results have certain scientific guiding significance for the treatment of surrounding rock and disaster prevention and mitigation when the coal seam mining meets faults.

关 键 词：断层活化 应力演化 上下盘开采 逆断层 弱化赋值法 

分 类 号：TD327[矿业工程—矿井建设] X936[环境科学与工程—安全科学]