放顶煤新工艺的应用与推广

Application and spread of the top - coal drawing process

在中厚煤层中，采用П型梁放顶煤的方法，使得分层开采变为一次采全高，从而降低吨煤成本，缓解小搂续紧张难题。

At middle and thick coal seam, adopting II type beam top - coal drawing method, make slicing mining into mining the whole height in one times so as to drop the cost of per ton and relax the difficulties of contineous mining.