1results about How to "Reduce mining difficulty" patented technology

The application discloses a kind of steep coal seam group horizontal segmentation and trend longwall mixed mining method, comprising: according to the stage height of thin coal seam single mining calculated and determined when coal seam slips or is destroyed opportunity;According to the segmentation height of thick coal seam, according to the space coordination requirement calculation, the space coordination requirement is, after thin coal seam is mined according to stage height single, the projection length of top contact caving length after thick coal seam is mined according to μ segmentation height stage is same in horizontal plane, caving zone and fracture zone and goaf overlap;According to the corresponding single mining progress, the thin coal seam and the thick coal seam are alternately mined.The stage height of thin coal seam single mining and the segmentation height of thick coal seam are quantitatively calculated according to coal seam slip or destruction opportunity, and thin coal seam and thick coal seam are alternately mined according to the requirement of space and time coordination, impact strata control, strata movement control and the coordination of mining efficiency improvement are realized.