摘要
以某矿面向断层开采的5302工作面为工程背景,模拟了工作面回采过程中断层及断层周围煤岩体垂直应力、塑性区及断层滑移演化规律,提出了断层煤柱的合理尺寸,并制定了卸压方案。研究结果表明:工作面回采期间断层及断层周围煤岩体受构造应力与采动应力叠加作用下应力高度集中,容易诱发冲击地压;微震、应力在线监测结果对比分析表明,制定的爆破断顶、钻孔卸压技术方案能够有效降低应力集中程度,避免工作面面向断层开采时诱发冲击危险。
Taking the 5302 working face of a mine facing the fault as the engineering background,the vertical stress,plastic zone and fault slip evolution law of the fault and the coal rock body around the fault were simulated during the back mining of the working face,and the reasonable size of the fault coal column was proposed and the pressure relief scheme was formulated.The research results show that the fault and the coal rock around the fault are highly concentrated under the superposition of tectonic stress and mining stress during the workface recovery,which can easily induce impact pressure;the comparative analysis of microseismic and stress on-line monitoring results shows that the technical scheme of blasting roof breaking and drilling pressure relief can effectively reduce the degree of stress concentration and avoid the risk of rock burst induced by working face mining facing faults.
作者
顾士坦
毛文涛
韩传磊
赵燕席
李旭智
刘志尧
GU Shitan;MAO Wentao;HAN Chuanlei;ZHAO Yanxi;LI Xuzhi;LIU Zhiyao(School of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Wenshang Yiqiao Coal Mine Co.,Ltd.,Jining 272000,China)
出处
《煤炭技术》
CAS
2024年第5期34-39,共6页
Coal Technology
基金
山东省自然科学基金(ZR2023ME147)。
关键词
断层煤柱
冲击地压
应力集中
爆破断顶
钻孔卸压
fault coal pillar
impact pressure
stress concentration
blasting method with roof-broken
borehole pressure relief
