摘要
以深部孤岛工作面残留煤柱的冲击地压防治为背景,研究了残留煤柱对工作面回风巷道的应力分布及能量演化规律的影响,通过对比分析了卸压前后回风巷两侧集中应力分布情况,并利用上层煤遗留巷道作为卸压巷道对高应力区域的卸压效果进行了数值模拟计算。基于理论分析和数值模拟计算,采用大直径钻孔卸压和爆破卸压技术对回风巷道进行了冲击地压防治,卸压效果显著,保证了回风巷的稳定,使工作面得以安全回采。
Taking prevention of residual coal pillar rock burst in deep isolated work face as background, studied the effect of residual coal pillar on the stress distribution and energy evolution laws of air return roadway of work face, analyzed the concentrated stress distribution condition of two sides of air return roadway before and after pressure release, and numerically simulated pressure release effect of residual roadway in upper coal layer, as pressure release roadway, on high stress area. Based on theoretical analysis and numerical simulation, large diameter borehole pressure release and blast pressure release technique were conducted to prevent rock burst at air return roadway. The relief effect was favorable, the stability of air return roadway was enhanced and mining production of work face could be guaranteed.
作者
王永瑞
魏辉
Wang Yongrui Wei Hui(Mining Branch Company, Kailuan （Group） Co. , Ltd. , Tangshan, Hebei 063000, China College of Mining ＆ Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266000, China)
出处
《中国煤炭》
北大核心
2017年第5期57-59,78,共4页
China Coal
关键词
冲击地压
孤岛工作面
残留煤柱
钻孔卸压
爆破卸压
rock burst, isolated work face, residual coal pillar, borehole pressure release, blast pressure release
