关键词: 回采巷道, 采动影响, 塑性区, 非均匀变形, 围岩控制

Abstract: The roadway affected by the in-situ stress and mining stress will produce non-uniform deformation, and even cause roof accidents. The stability control of surrounding rock of mining roadway is the key to realize the safe and efficient production. In view of the serious deformation of 152106 working face track roadway under the influence of mining in Changling No. 1 Coal Mine, field monitoring, numerical simulation and other research methods are used to analyze the deformation characteristics of surrounding rock and the evolution law of plastic zone of mining roadway. The results show that under the influence of mining, the deformation of roadway surrounding rock is non-uniform. The deformation of roadway surrounding rock in front of the working face is smaller than that in the back of the working face, the deformation of roadway pillar side is larger than that in the coal wall side, the roof is separated and the floor heave near the pillar side are larger, and locally up to 400mm. The maximum principal stress, the ratio of principal stress and the range of plastic zone in front of the working face are all smaller than those behind the working face, plastic zone is elliptic in shape, and the displacement of surrounding rock is consistent with the range of plastic zone. Based on this, the reinforcement support scheme is put forward, namely the roof and the coal pillar is reinforced with anchor cable and two-ended cable respectively, and the single hydraulic prop is set up. The field test results show that the deformation of pillar wall of the track roadway is reduced by 65%, and the roadway floor heave is 260mm, so good engineering application effect has been obtained.