Application of Large Angle Rotary Mining Technology in Xiaonan Mine

In order to solve the mining gateway layout difficulty, the frequent face equipment removing and the fully mechanized mining efficient lower problems occ urred by the four coal mining faces in the previous design layouts for the standby mining area in the north part of the West No.3 Mining Block of Xiaonan Mine, accordin g to the seam deposit features of the mining seam, based on the theoretical analysis, the previous designed four coal mining faces were simplified to one coal mining fa ce (No.W3707) and a large angle rotary combined mining would be conducted.In order to ensure the technology successfully conducted, a 75° mining curve was recons tructed into 6 short strings.After the rotary center confirmed by twice, with the adjustment mining principle of the conveyor head with more advancing forward and the Co nveyor tail with less advancing, the deep and shallow cutting technique was applied to solve the technical problems of the three face removing and the coal mining rate of the coal mining face was improved about 5%.