Based on the analysis of surrounding rock movement of an old roof collapsed roadway parallel to a fully mechanized top coal caving face, the new technique of filling this kind of roadway with the material with high water content was put forward.

Application of water-spraying dust control technique for the fully mechanized coal face with top-coal drawing;

Gas treatment technology of mechanized top-coal caving face

Based on theoretical analysis and numerical simulation, the stability of surrounding rock of roadway driving along next goaf for fully-mechanized top-coal caving mining was studied.

3 coal seam and its hydrogeological conditions, and points out that the top coal caving on fully-mechanized working face has overcame some problems such as the difficult movement of the breaker because the heavy pressure of the main tunnel, the serious wall caving on the working face, and the working face\'s passing through fault, etc.