Research on Repair and Reinforcement Technology for High Ground Pressure Roadway
In order to solve the problem of roadway maintenance difficulties caused by the unstable structure of deep mine roadway and large deformation of surrounding rock,taking the coal seam return air roadway in the north two 11-2 panel area of Guqiao Mine as the engineering background,the deformation control mechanism of the roadway surrounding rock is deeply studied.According to the stress characteristics of the roadway and the reasons for surrounding rock damage,a reasonable roadway repair and reinforcement plan is proposed.The comprehensive use of anchor cable active reinforcement technology that mobilizes deep surrounding rock to participate in bearing,anchor cable vertical and horizontal combination arrangement technology that improves the stiffness of roof support,spray grouting reinforcement technology that restores the integrity of the roadway surrounding rock,strengthening reinforcement technology that repairs strength in one go,and segmented optimization reinforcement technology are used to reinforce and repair the roadway;analyze the application effect of roadway maintenance and repairation by using ways such as surface morphology observation,drilling peeping,deformation observation and so on.The results show that the subsidence amount of the roadway roof and the displacement amount of the two sides are improved,effectively solving the problems of large deformation and unstable surrounding rock structure of the coal seam return air roadway in the 11-2 panel area,which is of great significance for controlling the deformation of the roadway surrounding rock with high ground pressure under the influence of mining stress.
high ground pressuredeformationroadwayreinforcement
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