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采用FLAC3D应变软化模型,结合顾桥矿11-2轨道下山工业性实验,对深部软岩巷道的围岩分区变化特征和承载机理进行分析,研究表明:在深部软岩巷道中3 m以内的围岩位移变形和应变较大,围岩破坏严重,是支护的主要对象;在3 m以外、12 m以内的围岩应力相对集中,是支护围岩结构的主体,控制位移变形向巷道深部发展,并保护巷道表面的围岩与支护结构共同发挥支护效应,有效提高了巷道的整体稳定性。
Based on the FLAC3D strain softening model and the industrial experiment of Guqiao 11-2 track downhill, the change characteristics and bearing mechanism of the surrounding rock in the deep soft rock roadway are analyzed. The results show that in the surrounding soft rock roadway within 3 m Rock displacement deformation and strain larger, the surrounding rock serious damage, is the main object of support; in 3 m, 12 m less than the surrounding rock stress is concentrated, is supporting the main body of the surrounding rock structure to control the displacement of deformation to the deep Development and protection of the surrounding rock roadway and supporting structures to play supporting effect, effectively improving the overall stability of the roadway.