Regional Control Technology for Gas Pre-drainage in Coal Seam by Directional Long Borehole

In the process of implementing regional gas control, the outburst mine has gradually formed the main mode of protective layer mining and floor rock roadway through layer extraction. However, in the single hard coal seam where gas and water “double” disasters threaten seriously, the problem of water damage in the roadway of floor rock is more obvious. By implementing the technology of regional control of gas in coal roadway, the uniform control of coal body within the range of coal roadway tunneling is realized, the water inrush threat on the floor is eliminated, and the safety tunneling of coal roadway is guaranteed.