Study of erosion zones in coal seams is Tiefa mining area

The geological background of erosion zones in coal seams in Tiefa area is discussed. It is suggested that the genetic types of severely damaged zones in coal seams are related to synsedimentary stream channel erosion zones, postsedimentary stream channel erosion zones and inherited stream channel erosion zones, and their recognizable characteristics are represented. Based on analysis of sedimentary facies of coal measures in Tiefa mining area, the erosion zones in the coal seam No.4 in Dalong mining area are predicted by means of the isopach map of sand bodies of coal roof, and their general distribution regularity in Tiefa mining field is revealed.