Shoring technology of the Ahead of time to the sides hydrolic shield in the roadway;

Analyse general situation of working face, way of excarating coal, equipment type, lay of hydraulic pressure braket and benefit, this paper discusses use termination point hydraulic pressure bracket replace dense shoring in 14404 working face in Dong Qu mine.

This paper expounds the roof regularities of the fully mechanized mining face,probes into the harmfulness caused by the end-support lagging and waste edge unevenness,points out that the main causes of the end-support lagging are the problems of the manufacturing of the scraper conveyor and the device attachment,and puts forward some suggestions.

According to the underground geological conditions and existing equipment situation of Chengzhuang Coal Mine,this paper introduces the design and successful application of the light-type end bracket.