关键词: 神东矿区, 超前支护, 锚索, 主运巷, 矿压显现

Abstract: Abstract: Based on the conditions of 22406 fully mechanized working face in Bulianda Coal mine, the paper studies the scientificness and rationality of adopting the active advancing support of anchor cable in the main roadway of the working face by combining theoretical analysis and field measurement. Based on the supporting model of solid coal roadway on both sides and the calculation and analysis of relevant parameters, it can be seen that the advancing support form of "row distance of 3m, 2 sets per row" between the special anchor cable designed for the main tunnel roof and the original support meets the requirements of the working face advanced support. Through the force monitoring of the anchor rod (cable) in the advancing support section of the main roadway, it can be seen that the influence range of the advancing abutment pressure is about 42m, and advancing pressure is larger in the range of 10 ~ 26m away from the working face, and the statistical stress concentration coefficient is 1.23 ~ 1.5. According to the displacement monitoring of the surrounding rock surface, it can be seen that the main roadway begins to deform under the influence of mining at about 35m from the working face. During the mining process, the maximum subsidence of the roof is 12mm, the floor heave is 16mm, the forward side heave is 29mm, the secondary side heave is 25mm, the maximum separation of layer is 7mm in the deep part of the roof, and the maximum separation of layer is 3mm in the shallow part. The above research results show that the surrounding rock can be effectively controlled and the field application effect is good by using the anchor cable reinforcement advancing support method. The popularization and application of this technology in Shendong mining area is of great significance in realizing unmanned and less unmanned working face and reducing labor intensity of workers.