Rational Selection of Mining Method for High Cutting Coal Mining Face

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 left 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 mining 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 layout 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 the 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 highly reduced.