Mitigation mining technology and application of fully mechanized coal mining face in Halagou coal mine in Shendong mining area

The coal mine fully mechanized mining face often encounters irregular borders.Generally, through the adjustment technology of fully mechanized mining face, both ends of the working face are adjusted to ensure that the working face is perpendicular to the slot.In this paper, the first real center of the fully-mechanized mining face in the Shendong mining area was studied based on the 22528 working face of the Halagou coal mine in Shendong mining area, from the aspects of preparation before the inclined mining of the working face, pre-explosion of the deep-hole opening, and oblique mining.The inclined mining technology first proposed the division of 35^# from the working face to 177^# of the tail, divided into 5 segments (each 50 m long), and the tail was advanced by 4 cycles to reach 43.3 m, successfully passing through the middle of the working face 9.5° large corner, finished working face slanting 11.5° corner; secondly, the safety technology measures such as the overall driving distance measurement of the working face, the prevention of the support inversion frame and the transporter’s turbulence are given; finally, the characteristics of the mine pressure during the inclined mining are summarized.The practical results show that on the one hand, the inclined slope mining technology of Halagou coal mine is used to expand and strengthen the return air along the trough, so as to avoid backing off the support during the skew adjustment and ensure the normal mining of the working face; on the other hand, it has improved the recovery of coal resources and economic efficiency.This technology is an important guidance and reference for the inclined mining of fully mechanized coal mining face under similar conditions in the mining area.