Research and Application of Coal Pillar Size Optimization and Grouting Anchor Cable Reinforcement Support
In view of the current situation of deep burial and resource depletion in mines,taking the reserved size of the protection roadway small coal pillar and the strengthening support mode of surrounding rock in the 2-301 joint roadway of Ganhe Coal Mine as research objects.Through the numerical simulation of stope advance support pressure,the principle of stope periodic compression mechanics and the comprehensive analysis of underground actual mine pressure data,it is determined that the reasonable size of coal pillar is 8 m;The grouting anchor cable surrounding rock control technology is used for surrounding rock reinforcement,a grouting anchor cable reinforcement support scheme is developed and underground on-site tests are conducted.The tests results show that the grouting anchor cable surrounding rock control technology has a good effect on controlling the deformation of the 8 m small coal pillar and the roadway surrounding rock in the mining affected area,achieving the purpose of overall deformation of the surrounding rock less than 120 mm,improving the resource extraction rate,and providing a basis for the promotion and use of small coal pillar protection roadway in the future of the mine.
last miningsmall coal pillarmining influencegrouting anchor cable
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