关键词: 分区域支护, 主动式超前支护, 围岩变形, 注浆锚索, 矿压监测

Abstract: The support form of "single/hydraulic support" in advance section of two roadway in longwall coal face does not match the development trend of automation and intelligence of the working face. The active advance support technology provides a feasible technical path to realize the dehumanization of advance section of two roadway. Aiming at the problems of high labor intensity and low mining efficiency of passive advanced support in thick and hard roof working face of Qiwu Coal Mine, the field test of roadway surrounding rock structure was carried out with 217 working face transport lane as the research object, and the crack development law of roadway roof in 3 upper coal seam was revealed, and the advanced abutments pressure was calculated according to the mechanical model of roadway surrounding rock. Based on this, the "regional differentiation" active advanced support scheme was proposed, and the active advanced support scheme was checked at each stage through the support strength checking formula, which met the requirements of advanced support. The industrial test shows that the maximum relative movement of roof and floor is 50 mm, and the maximum relative movement of two sides is 56 mm. There is no obvious breakage or separation in the roof, and only a small amount of 0.01 m transverse cracks appear in the shallow part. Therefore, active forepole can completely meet the needs of the abutment pressure area supporting quality, the stability of surrounding rock is stronger, better able to control the surrounding rock fracture, and improved the labor environment, reduce the security hidden danger, enrich the active forepole project cases, for the similar geological conditions of extraction roadway active support to provide the reference in advance.