What are the coal mining methods?

Coal mining method; Longwall mining method and pillar mining method are divided into blasting mining method, conventional mining method and fully mechanized mining method according to the system. Treatment according to goaf: caving method, filling method and coal pillar method. Operation mode: coordinate coal mining and timely preparation: backward mining: mining when the working face is advancing in the direction of transporting coal up the mountain; Gob-side entry retaining when the direction of coal transportation in the working face is backward; The section drift does not need to be excavated in advance, but only needs to flow out of the goaf with the advance of the working face. Gob-side entry driving: simultaneous mining along the goaf edge of the mined working face in the roadway driving section: the upper and lower layered working faces in the same section can be mined with a certain offset. Simultaneous mining. Separate mining by layers: after mining one layer in a section, after a certain period of time, after the roof caving benchmark is stable, it will be buried in the sublevel drift being excavated before mining.