Optimized Surrounding Rock Support Technology of Deep Mining Roadway with Composite Roof
Aiming at the problems of large deformation and high support difficulty in the surrounding rock of deep mining roadway with composite roof,taking 11205 air inlet crossheading of Shanxi A Mine as the research object,the poor control effect of surrounding rock under the original support scheme was analyzed by applying roof separation monitoring technology and drilling camera detection instrument,and it was found that the anchor rod and cable anchoring area were not in the stable rock formation,and moreover,the anchoring areas were all located in the areas with large amount of roof separation,which led to the increase of roof subsidence.Therefore,it was proposed to increase the length of anchor cable,improve the supporting density and strength of anchor rod and anchor cable,and use high-strength surface protection materials to optimize the surrounding rock support scheme.Field monitoring showed that the optimized support scheme adopted by 11205 air inlet crossheading had remarkable effects,which can effectively solve the serious deformation of surrounding rock in deep mining roadway with composite roof.
deep miningcomposite roofroof separation layersurrounding rock support
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