Coal mining of fully -mechanized coal winning and caving the roof included two processes:fully -mechanized c oal winning and caving the roof.

• 综放开采包括综采和放顶煤两个过程,在放顶煤的过程中由于其开采空间,实际落煤损失难以确定,导致工作面采出煤量计算困难。