Abstract:In order to solve the serious problems of mine pressure and roadway deformation caused by the combination of thick hard roof and plastic floor in No.W3305 fully mechanized working face, the geological conditions of the working face were analyzed, and the bidirectional directional blasting method was adopted to cut off the cantilever beam structure of the open side roof of the working face and reduce the revolving stress of the key layer of the roof. The roof and floor of the roadway along the empty side were supported steadily by casting the flexible mold wall and strengthening the bottom plate by grouting. Through the new integrated support of anchor cable, the failure of anchor cable and broken roof cable were solved. The results showed that the strategy of bidirectional shaped blasting, roof cutting and pressure relief, flexible mold wall support, new anchor cable support and floor soft rock reinforcement can effectively solve the problem of roadway deformation and instability, and save about 5 million yuan.
刘春记. 切顶卸压及复合支护体系在沿空留巷中的应用[J]. 煤炭与化工, 2024, 47(5): 14-18.
Liu Chunji. Application of roof cutting pressure relief and composite support system in gob-side entry retaining. CCI, 2024, 47(5): 14-18.