Abstract:
The main ore body of Songxian Gold Mine is located in the structural alteration zone. In view of the problems of poor stope safety, high mining loss and dilution existing in the shallow hole shrinkage mining method, based on the considerations of stope operation safety, ore rock ground pressure stability, reducing mining loss and dilution, and ensuring stope production capacity, the upward horizontal approach backfill mining method was proposed. The preparation cutting engineering and stoping technology of this mining method were described in detail. Field industrial application shows that the upward horizontal approach backfill mining method has low mining loss and dilution, with a mining loss rate of only 8 % and an ore dilution rate of 12 %. The operation safety is significantly improved compared with the previous mining method, and the comprehensive production capacity of the stope reaches 130 t/d. The technical and economic indicators can meet the production requirements, improving the total mine revenue. It is a safe, feasible, economical and effective mining method.