CHINA MINE ENGINEERING

The sublevel stoping with post filling method has been continuously improved in the operation of Tongshankou Copper Mine, both in mining and backfilling. The method was applied consecutively in 6 stopes at Level -160m, with operation indicators markedly improved: ratio of cutting/preliminary development and mining tonnage reduced by 17m3/kt, overall dilution and loss rates reduced by 2.23% and 2.42%, stope production capacity improved by 80.5t/d, direct cost of stope operation reduced by 44.2 yuan/t. The optimization thus serves as a good reference for the promotion of the mining method.