Support Optimization of Large-section Mining Roadway in Thick Coal Seam
In view of the large support strength,long support time and high support cost of the original support scheme of 12503 air return roadway,the surrounding rock support parameters of the air return roadway were optimized.Specifically,the support cost was reduced and the support efficiency was improved by appropriately reducing the density of bolt and cable support and reducing the surrounding rock support strength.After the support optimization,the surrounding rock deformation of the air return roadway was small and within the allowable range,the comprehensive support cost of the roadway was reduced by about 47.3%compared with that before the optimization,and the supporting time was significantly reduced.Support optimization design has significant effects on reducing roadway support input and improving roadway driving efficiency.
thick coal seamoptimization of surrounding rock supportsimulation analysis