Outburst elimination method for surface drilling coal extraction area

The invention discloses an outburst elimination method for a surface drilling coal extraction area. The outburst elimination method comprises the following steps of (1) directional drilling, (2) mechanical reaming, (3) hydraulic jetting, (4) mechanical reaming, (5) hydraulic jetting, (6) drainage and pressure relief, (7) hydraulic jetting, (8) mechanical reaming, (9) drainage and pressure relief and (10) anti-reflection extraction sealing. The ground drill hole is drilled to a target position through directional drilling construction, and the coal seeing and stopping condition of the drill hole is accurately recorded; a mechanical power reaming coal extraction drill bit is adopted for sequentially extracting coal from a coal seam top plate to a coal seam bottom plate, the diameter of the mechanical power reaming coal extraction drill bit is gradually increased, and reaming coal extraction is conducted step by step; in order to further improve the coal extraction amount, a hydraulic jet and large-aperture mech