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Abstract The mining area in Fengfeng mining area is gradually extended to the depth of 1,000 meters deep, and the coal seam in the deep area is characterized by high gas pressure, large content and difficult to extract, etc. The difficulty of gas management during the recovery of No.2 coal seam working face was gradually increased. The three-dimensional extraction technology based on high directional long drilling in the deep area to solve the problem of gas overrun during the recovery period was given. The three-dimensional extraction was achieved by using a combination of high directional long holes and conventional extraction holes in complex rock formations with a directional drilling rig to achieve safe and efficient production.
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