Optimization of the size of coal pillars reserved for auxiliary transportation roadway protection
In order to solve the problem of waste of resources caused by unreasonable coal pillar reserved,taking the No.40102 working face of Gaojialiang Coal Mine as the engineering background,the size of auxiliary transportation roadway coal pillar reserved was opti-mized through numerical simulation and theoretical analysis.From the perspective of roadway deformation and stress distribution,simula-tion analysis showed that reducing the size of coal pillars reserved by 5-25 m was feasible.According to theoretical analysis,the nucle-ar zone rate of more than 75％was the safety judgment standard,only scheme 1 met the standard of mine safety production.The width of the coal pillar reserved size was determined to be 55 m.The research results provide reference for the optimization of the size of coal pillars in auxiliary transportation roadway protection,which is helpful for coal resource recovery.
coal pillarsize optimizationauxiliary transportation roadwaynumerical simulationwidth of coal pillar
万方数据
维普
