Study On Monoclinic 2 Slot Extraction Roadway Deformation Law And Supporting In Da' Anshan Coal Mining

With constantly deepening coal mining depth, complex coal seam occurrence state, Steep seam roadway control problem has become a threat to our country coal enterprise development, efficient development, been one of the high-profile research problems. Affected by soft surrounding rock, roadway in surrounding rock deformation and damage has brought great difficulty for controlling and maintenance of underground roadway.Therefore, The research of soft rock mining of deeply inclined coal seam roadway deformation law and the control scheme has important practical significance.In this paper, as a research premise of 2 slot inclined seam mining roadway in Da'an Shan coal mine+ 550 level.By the experiment coal and rock physical parameters,have got a rock physical and mechanical parameters of every layer, determined the soft rock strata; By FLAC-3D numerical software simulated the monoclinic 2 slot extraction roadway deformation law in Da'an Shan coal mine+550 level, determined the key part of the roadway deformation instability;According to the characters of no support roadway deformation, Basing on the theory of the agency, designed support scheme in different coal seam and optimized scheme by using numerical simulation, determined the optimal supporting parameters; carried out the field industrial test of supporting scheme by selecting roadway 2 monoclinic slots, the largest nearer amount of roadway surrounding rock tested is less than 20 cm, verify the feasibility of supporting schemes.