Abstract:
According to the large coal pillars left between the coal mining faces, the cutting height partially not meet the seam thickness requirement, the top coal I eft at the transition sections of the delta seams near the face conveyor head and tail and other problems existed in the mining of the high cutting coal mining face, a min ing process of a cross over coal mining face with a face length increased, a high cutting height increased, a cross over gateway mining, a delta seam recovery, a face la yout changed was applied in order to realize the narrow coal pillar mining and other mining method to improve the coal mining recovery rate.The results showed that th e rational selection of the high cutting coal mining and the mining method could make the resources recovery rate to 75%80% and the coal resources lost could be highl y reduced.