The dynamics principle of the sublevelmining method was investigated.
研究了分段充填采矿法的动力学原理。
2
Recovering coal by sublevelmining pillar and not damaging the houses on ground is introduced.
用条带开采煤柱回收煤炭资源，而不破坏地面房屋、住宅。
3
Take an underground copper mine as studying object, on which the surface has to be protected, the mining method of sublevel filling method with roof reconstructing is studied.