Elevation drilling pressure measurement and extraction blowout prevention hole device applied to high outburst coal seam

The utility model discloses an elevation drilling pressure measurement and extraction blowout prevention hole device applied to a high outburst coal seam. The device comprises a gas collecting pipe, adrainage pipe, a plugging section and a spherical protection head, a plurality of air guide holes are respectively formed in the air collecting pipe; the drainage pipe is sleeved with the rear end ofthe gas collecting pipe; the plugging section is a polyurethane plugging section; the plugging section is sleeved at the rear end of the drainage pipe; the outer end and the inner end of the pluggingsection are respectively in sealing contact with the inner wall of the coal seam drill hole and the outer wall of the drainage pipe; the key point is that the spherical protective head is a semi-circular sphere; the plane of the rear end of the spherical protective head is fixedly connected with the gas collecting pipe head; and a plurality of supporting rods are respectively and fixedly arrangedon the periphery of the sph