掘进时高应力近距离巷道工程稳定性研究

摘要

The perturbation and stability of high-stress short-distance roadway during excavation are analyzed by field monitoring, theoretical analysis and numerical simulation.The results show that the stress release area will expand under the action of dynamic load, which is induced by the roadway excavation conducted to surrounding rock and the adjacent chamber.In a blasting tunneling with short length, the whole section of the roadway deformation will increase, and vice versa.%采用现场监测、理论分析及数值模拟等方法,对高应力近距离巷道在开挖过程中产生的扰动及稳定性进行了分析研究.对开挖工序和一次爆破掘进长度等掘进方案的数值进行模拟,研究结果表明:应力释放区域会在动载荷的作用下扩大,是由于巷道围岩及邻近硐室受到巷道开挖所产生的变形扰动所致;在一次爆破掘进长度较短时,整段巷道的变形会因为扰动次数的增加而增大,反之亦然.