The technology of passing the used roadway in sublevel caving adjusting working face

The used roadways of 1301 sublevel caving working face were divided into two types:large angle used roadway and small angle used roadway, according to the concrete production practical of two types used roadways, using different methods to passing them, obtained good economic benefit, innovative use of coal as filling aggregate to filling the small angel used roadway, saving the economic cost while improving the coal quality, and accumulated rich safety production experience of passing used roadways in sublevel caving working face.