Roadway Control Technology And Deformation Law Under The Influence Of Multiple Mining

In process of multi-seam mining, The roadway of repeated mining occurs problem of deformation and failure easily.In this paper, In the context of Sihe Coal Mine No.2 15 # coal seam 151 area, region of the roadway by the impact of the overlying IX4309 mining face and repeative influence mining by XV1303 Face,showing the rapid deformation of the roadway, the bottom drums serious pressure,coal pillar features crisp and other damage. By surrounding rock in situ testing,panoramic peep drilling, mechanical means of laboratory analysis, analysis of the 15 #coal seam structure and parameters of rock mechanics; through field research and analysis summarizes the main roadway deformation characteristics; numerical simulation using FLAC3 D studied around 9# seam coal mining face and the impact of the different recovery stages XV1303 area of 151 roadway stress and strain; Based on this feature, proposed the use of fast-setting, high early strength, a wide range of diffusion of new grouting material grouting reinforcement, and reinforcement of the secondary support program by prestressed anchor. Field trials in XV1101 lane, the results showed that, Federal reinforcement materials with high strength, permeability and other characteristics, filling of coal and rock crushing timely, increase its carrying capacity, while allowing the anchor net support system in time to play a role; 40 days after the tunnel grouting, Contraction of two sides roadway only 58 mm, the maximum amount of kick drum 46 mm, roadway deformation rate gradually tends to 0, in the stable phase, the treatment effect is obvious.