关键词: 开采扰动, 松软岩层, 巷道大变形, 全锚索支护, 巷道修复

Abstract: In order to solve the engineering problems of surrounding rock instability and poor support reliability after roadway repair in soft rock strata under the mining influence，taking the belt roadway in the west wing of Gaojiazhuang Coal Mine as the engineering background，aiming at the large deformation disas⁃ ter of roadway induced by secondary mining，the research methods of fracture detection，theoretical calcu⁃ lation，numerical simulation and field industrial test are used to compare and analyze the bearing charac⁃ teristics of four support forms of bolt，U-shaped steel shed，long anchor cable and short anchor cable. The theoretical calculation results show that the short anchor cable support strength is the highest，and the U�shaped steel shed support strength is the lowest. The comprehensive support performance and economy de⁃ termine the long and short anchor cable combined full anchor cable support scheme. Numerical simulation verifies that the support system can significantly inhibit the convergence of the two sides of the roadway and the deformation of the floor heave. The field application shows that the full anchor cable support can make the anchor cable of the broken surrounding rock section closely fit the rock surface and improve the sur⁃ rounding rock stress environment. After the repair，there is no obvious deformation in the roof and two sides of the roadway，and only the floor has slight floor heave. The steel consumption of the roadway is 580 kg，and the daily maintenance footage can reach 4 m. The support scheme has high construction efficiency and low support cost，and can effectively control the large deformation of mining roadway in soft rock stra⁃ ta，which can provide engineering reference for roadway repair project under similar geological conditions.

Key words: mining disturbance, soft rock strata, large deformation of roadway, full anchor cable sup? port, roadway repair