摘要
为解决大庄煤矿3802综采工作面过大落差断层围岩控制难题,采用理论分析、数值模拟的方法,研究了采动下断层岩体活化响应力学机制,分析不同推进距离下断层两盘岩体的应力及变形演化规律。结果表明:断层结构与煤层开采之间相互作用是断层活化的力学关键,动静载荷在断层积聚形成了断层解锁活化的能量条件。顶板悬顶越长,两盘受力由受压转为受拉,断层岩体裂缝发育贯通并沿断层面张开。提出直接通过时上下盘围岩分区域控制原则和调整回采参数、加强支护和破碎区注浆为主的控制技术,工作面安全通过了断层区,取得了显著经济效益。
In order to solve the difficult problem of controlling the surrounding rock mass of the large drop fault in 3802 fully mechanized face of Dazhuang Coal Mine,the mechanical mechanism of activation response of the fault rock mass under mining is studied by means of theoretical analysis and numerical simulation,the Evolution Law of stress and deformation of rock mass on two sides of fault under different advancing distances is analyzed.The results show that the interaction between fault structure and coal mining is the key to fault activation,and the dynamic and static loads accumulate in the fault to form the energy condition of fault unlocking activation.The longer the roof overhang is,the more the stress on the two plates changes from compression to tension,and the fractures in the fault rock mass develop and open along the fault surface.The paper puts forward the principle of controlling the surrounding rock of the upper and lower wall in different areas and the control technology of adjusting the mining parameters,strengthening the support and grouting in the broken zone when the working face passes through the fault zone safely,which has achieved remarkable economic benefits.
作者
郭崇秀
GUO Chong-xiu(Jiaokou County Earthquake Prevention and Disaster Mitigation Center,Jiaokou 032400,China)
出处
《煤》
2022年第8期1-3,58,共4页
Coal
基金
国家自然科学基金资助项目(51974194)
山西省应用基础研究计划面上自然资助项目(201901D111049)。
关键词
采动作用
断层活化
响应特征
演化规律
分区域控制
mining action
fault activation
response characteristics
evolution law
sub-regional control
