What are the highlights of the director of coal mine workshop?

(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 wear iron shoes to prevent the single pillar from drilling to the bottom, and unified numbering management is carried out.

(2) The monorail crane shall be used for the cable and high-voltage pipeline in the track doorway.

(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.