底板承压水作用下断层破碎带岩体冲蚀-渗流灾变规律研究  

Study on the fault erosionseepage rule under the effect of floor confined water

作　　者：安泰龙 姚邦华[2,3] 李硕 杜锋 李振华 王戈 AN Tailong;YAO Banghua;LI Shuo;DU Feng;LI Zhenhua;WANG Ge(Energy Bureau of Inner Mongolia Autonomous Region,Hohhot,Inner Mongolia 010098,China;School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China;Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Jiaozuo,Hean 454000,China)

机构地区：[1]内蒙古自治区能源技术中心,内蒙古呼和浩特010098 [2]河南理工大学安全科学与工程学院,河南焦作454000 [3]煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454000

出　　处：《采矿与安全工程学报》2023年第2期354-360,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(52274193,52174073);河南省自然科学基金项目(202300410182)。

摘　　要：针对断层突水问题,将研究对象细分为固体、充填物颗粒以及流体3部分,建立了考虑冲蚀作用的断层突水的流固耦合数学模型。以此为基础,利用COMSOL Multiphysics软件将理论模型数值化,数值模拟研究了断层充填物颗粒运移流失及渗透性演化规律。研究结果表明:底板承压水作用下断层冲蚀突水过程可以划分为两个主要阶段,在缓慢渗流阶段,断层的裂隙开度和涌水量缓慢增加;在渗流突变阶段,裂隙开度和涌水量急剧增加。在冲蚀作用下,随着断层内部可冲蚀颗粒的液化、迁移和流失,流体中充填物颗粒体积分数呈现先增大后减小的趋势。在承压水冲蚀作用下,部分裂隙不断扩张和贯通并发展成为数条优势导水通道,最终造成了断层涌水量的急剧增大和突水事故的发生。研究结果对于揭示断层渗流灾变机理并指导其突水防治具有重要理论意义。Considering the fault as three parts,that were solid,filling material and fluid,a fluid-solid coupling mathematical model of fault water inrush was established.Then,a numerical model was built to study the particle migration and the evolution of permeability by using COMSOL Multiphysics software.The research results showed that:the fault erosion and water inrush process could be divided into two main stages.In the slow seepage stage,the fracture opening and water inflow of the fault increased gradually.In the sudden seepage stage,the fracture opening and water inflow increased sharply.In the erosion process,the concentration of particles in the fluid first increased and then decreased.In hydraulic erosion of the confined aquifer,some fractures continuously expanded and several advantageous water channels were developed in rock mass,which ultimately caused water inflow rates increasing rapidly from the fault and induced the occurrence of water inrush accidents.The research results had important theoretical significance for revealing the of fault outburst mechanism and guiding its water inrush prevention.

关 键 词：断层突水 冲蚀作用 渗流灾变 数值模拟 

分 类 号：TD32[矿业工程—矿井建设]