A high gas outburst coal seam drilling and hydraulic punching anti-blowout and outburst device and method

Abstract

The invention discloses a blowout and outburst preventing device and a blowout and outburst preventing method for high gas outburst seam drilling, hydraulic flushing in hole and hydraulic cutting and belongs to blowout and outburst preventing devices and blowout and outburst preventing methods for coal seam drilling. A drill rod seal cartridge of the blowout and outburst preventing device is connected at one end of a gas-water-residue separation cavity, and a short capsule hole-packing sleeve is connected at the other end of the gas-water-residue separation cavity and is fixedly reinforced through an outburst preventing support. A drill rod penetrates through the drill rod seal cartridge, the gas-water-residue separation cavity and the short capsule hole-packing sleeve to reach a drill hole, the gas-water-residue separation cavity is connected with a gas-water-residue separation box through a high-strength spring hose, and the gas-water-residue separation box is mounted on a weighing system. The blowout and outburst preventing method includes that water and residues are discharged into the gas-water-residue separation box through a residue discharge outlet of the gas-water-residue separation cavity, gas in the gas-water-residue separation cavity and the gas-water-residue separation box enters a drainage pipeline completely, and the outburst preventing support plays a role in preventing a blowout device from drill shifting and outburst. The blowout and outburst preventing device and the blowout and outburst preventing method are safe and easy to operate and are applicable to hydraulic flushing in hole, hydraulic reaming, hydraulic cutting and blowout prevention during drill shifting and drilling.

Description

technical field [0001] The invention relates to a blowout and outburst prevention device and method for coal seam drilling, in particular to a blowout prevention and outburst prevention device and method for high gas outburst coal seam drilling and hydraulic punching. Background technique [0002] my country's coal and gas outburst disasters are very serious, and with the deepening of mining, the ground stress and gas pressure are getting higher and higher, and the danger of coal and gas outburst is becoming more and more serious and complex, which poses a serious threat to the safe and efficient mining of coal. Borehole drainage is the most important means of gas drainage and outburst prevention. Hydraulic measures such as hydraulic punching and hydraulic slits are widely used to enhance drainage through layer drilling. Hydraulic punching, hydraulic slits, and injection holes during drilling will cause gas disasters or gas overruns in working faces and roadways. In order t...

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Problems solved by technology

[0003] Technical problem: The present invention aims at the demand and the existing problems in the prior art, and provides a high-gas outburst coal seam drilling and hydraulic punching anti-blowout and anti-burst device and method to solve the problem of hydraulic punching or coal seam drilling in the prior art. The drill pipe is not completely sealed when drilling, the gas in the roadway often exceeds the limit when the injection hole is serious, the hole sealing is complicated and cannot be reused, the safety is poor, and the hydraulic measures along the bed cause prominent problems that cannot effectively prevent blowout and outburst

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