In the light of the fragmentized coal body in 2315 comprehensive mechanical coal mining face of Chengzhuang Coal Mine, this paper applies the grouting solidifying technology with Malisan N to solve successfully the difficulties existing in the ceiling management in the stoping process.

In the light of the hidden dangers existing in the back production of comprehensive mechanized coal mining face, this paper advances the scheme of reinforcing the fragmentized coal body around the geological structure to assure the smooth completion of the back production of coal mining face.

The effect of top coal smash result in different manners of moving support, pressure relief and “dower support—draw support—prop up” and sliding advance of support, are analyzed with contrast.