关键词: 煤巷群, 分区劣化, 裂隙区, 巷道支护, 围岩控制

Abstract: Based on the engineering geological conditions and the large surrounding rock deformation of Huangling No. 2 Mine, the theoretical analysis and field test method are used to analyze the evolution law of surrounding rock fissures of coal roadway nglunder the conditions of double-wing mining, and the partition deterioration index of surrounding rock of roadway is proposed. The partition deterioration feature and influencing factors of coal roadway group surrounding rock are studied, and the partition reinforcement time-sharing reinforcement technology of coal roadway group is formulated. The results show that the surrounding rock of the coal roadway group shows obvious partition deterioration feature, namely the three zones of fissure: the extreme development zone of shallow fracture, the middle micro-fracture zone and the deep original rock zone; the proposed three zones of support: shallow support zone (0m~2m), the central control area (2m~5m) and the deep bearing area (5m or more,especially 6m~8m) with the key parts in advance to strengthen and strengthen, to ensure the stability of the coal roadway group.