井下大型硐室群卸压保护的三维数值模拟

Three-dimensional numerical simulation on releasing pressure and protection effect of large caves in coal mining

基于现代力学理论，利用ANSYS有限元软件针对巷道围岩卸压机理进行数值模拟，分析了煤矿开采中卸压保护硐室群效果、硐室群的围岩应力与变形．研究表明，应力集中系数高达5～6时，硐室维护十分困难．通过在煤层中开辅助巷道，形成让压空间，使应力峰向围岩深部转移的方法，发挥深部围岩的承载能力，达到降低巷道围岩应力峰值的目的．

Based on the theory of modern mechanics, the ANSYS software was used to simulate on the releasing pressure mechanism of surrounding rock of roadway, and the releasing pressure and protecting effect, stress and surrounding rock deformation of caves in the mining of coal were analyzed. The results show that the eaves will be very difficult to be maintained when the stress intensity factor gets to 5 - 6. According to the means of sevice roaddway excavation in the coal seam, yielding pace is tornad, so the stress peak is shift into the deep part of surronding rock and load-carrying capacity of deeper surrounding ruck can be exerted, so an to get the purpose of controlling the stres and deformating of surounting rock of roadwing.