摘要
羊场湾煤矿1306孤岛工作面运输巷受顶板强烈动载扰动作用发生巷道冲击地压,通过现场调研、理论分析、微震监测和数值模拟等手段,对动静载叠加作用对巷道围岩的影响进行了研究。基于微震监测系统对冲击地压发生期间顶板大能量震动事件定位为依据,根据具体地质条件应用数值模拟方法建模分析了不同强度动载扰动作用下巷道围岩应力和位移演化规律。研究结果表明,随着动载震源与巷道距离的增加,巷道顶底板受到的影响效果急剧衰减,而两帮受到的影响效果成比例下降。
Headgate of 1306 work face at Yangchangwan roadway occurred. By utilizing field investigation, theoretical Mine was under strong dynamic load from roof and rock burst in analysis, microseismic monitoring and numerical simulation, this paper studied the influence of load superposition effect on the movement of surrounding rock. Based on microseismic monitoring system of roof energy vibration occurred during rock burst incident location, according to specific geological conditions, applying numerical simulation method to analyze different intensity of dynamic load disturbance of surrounding rock stress and displacement evolution. The results showed that with the increase of distance between dynamic load source and roadway, the influence of strata pressure on roof and floor decreased rapidly, and the effect of roadway side decreased proportionally.
出处
《中国煤炭》
北大核心
2017年第4期53-57,共5页
China Coal
基金
"十三五"重点研发计划(2016YFC0801404)
中国煤炭科工集团科技创新基金计划(2013ZD002)
关键词
动静载
碎裂巷道
微震监测
冲击地压
数值模拟
superposition load, cataclastic roadway, microseismic monitoring, rock burst, numerical simulation
