STUDY ON ROOF AND TOP-COAL CLASSIFICATION SYSTEM AND APPLICATION IN FULLY MECHANIZED TOP-COAL CAVING FACE

According to stratum quality index,this paper established classification norms of immediate roof and main roof.On the basis of analyzing main stability factors of top-coal,classified top-coal with fuzzy mathematics and mathematical statistics.In view of spot practical needs,developed classification system of roof and top-coal in fully mechanized top-coal caving face with VB60.This classification system may choose coal-mining system and support type in fully mechanized top-coal caving face.And it has tested and verified in parts of Shandong mine.Practice proved that this classification system was effective.