(1) According to the unstable composite roof of No.2 coal seam and other factors, the advance support is increased from 20 meters to 70 meters, all of which are hard connected, and iron shoes are used to prevent the single column from drilling to the bottom, and unified numbering management is adopted.
(2) Monorail cranes are used for cables and high-voltage pipelines at the track entrance and exit.
(3) The wind and water pipes along the belt chute and the track chute were replaced with four inches, and compressed air self-rescue and water supply rescue equipment were installed according to the standard.