Optimization and Practice of Tunneling Blasting Parameters in an Iron Mine of Hebei

Abstract:

According to the poor effects and low efficiency of tunneling blasting at the initial production of an iron mine of Hebei, the optimization was mainly carried on blasting parameters in blast-hole interval and arrangement. The production practice proves that tunneling effect has been improved with lowered blasting cost by the optimized blasting parameters, which have been applied in actual production.

Key words:tunnel excavation; blasting parameters; blast-hole arrangement; driving efficiency; driving cost