A high or low coalrecoveryrate of the top coal caving mining is related to the key technology of the coal mining method to be widely applied.
放顶煤开采煤炭回收率的高低是关系到能否推广这种采煤方法的关键技术。
2
To recover the remainder coal in the side slope walls of surface mine by use of underground coal winning method can increase coalrecoveryrate and mine economic effect.
采用地下台阶式开采法回采露天矿端帮煤可大大提高煤炭资源回收率和矿山经济效益；
3
This paper analyzes the preconditions for small and medium-sized coal mines to increase coalrecoveryrate, and puts forward some paths and measures for the second mining of the coal resources.