摘要
以吕家坨煤矿5470Y工作面停采线前方的密集巷道群为例,研究了采动影响下巷道群的应力分布状态,分析了大小煤柱破坏前后的支承应力变化和能量转移方向,得出在采动诱发下密集巷道群自身应力叠加是造成冲击地压的直接原因;并利用截流卸压原理阻断了工作面煤壁前方支承压力和能量向巷道群的传递。通过爆破卸压和钻孔卸压对冲击危险区域进行了解危处理,巷道群卸压后集中应力和能量大大降低。
Taking the serried roadway groups in front of the stopping line of No. 5470Y working face in Lvjiatuo Coal Mine as the research example, the stress distribution in roadway groups under the influence of coal mining was studied, and the variation of support stress and the directions of energy transfer before and after the big and small coal pillar failure were analyzed. The results showed that the stress superposition of roadway groups influenced by mining was the main reason of rock burst. The support stress and energy in front of coal wall were prevented transmiting to roadway groups using the diversion closure and pressure relief principle. The pres- sure relief methods of blasting and drilling were applied in the danger zone of rock burst, which decreased greatly the concentrated stress and energy.
出处
《中国煤炭》
北大核心
2015年第10期60-63,共4页
China Coal
关键词
深部巷道
密集巷道群
冲击地压
动压条件
能量转移
卸压技术
deep roadway, serried roadway groups, rock burst, mining condition, energytranfer, pressure relief technique
