Spray hole prevention drilling, cutting and punching drill tool for crossing hole of outburst coal seam

Abstract

The invention discloses a spray hole prevention drilling, cutting and punching drill tool for a crossing hole of an outburst coal seam. The drill tool comprises a double-channel sieve hole drill bit, a plurality of double-channel slag crushing drill rods, a plurality of double-channel drill rods and a drill tail water supply and slag discharge assembly which are sequentially installed in a lap joint and combination manner from front to back; the first double-channel slag crushing drill rod is provided with a high-low pressure converter and a jet nozzle; and a hole sealing and slag discharging assembly is installed at the opening end of the drill hole. The double-channel slag crushing drill rods finally enter a coal hole section of the crossing hole, and the double-channel drill rods only enter a rock hole section; the double-channel characteristic of the drill rods is utilized to form an inner slag discharge channel of a steel sieve hole structure, the double-channel slag crushing drill rods are utilized to crush coal briquettes and coal slags produced by drilling, cutting and punching, and sieve holes are utilized to control the particle size and the flow of the coal slags entering the inner slag discharge channel, so that the permeability of the inner slag discharge channel is ensured, the gas over-limit accident of a spray hole can be prevented, and the safety and controllability of the drilling, cutting and punching operation of the crossing hole of the outburst coal seam are improved.

Description

technical field [0001] The invention relates to the technical field of gas drainage devices in coal mine mining, in particular to a blowout prevention hole drilling, cutting and punching drilling tool used for drilling holes through outburst coal seams. Background technique [0002] Many provinces in China require the excavation of floor rock roadways for the extraction of gas from outburst coal seams, and the construction of layer-crossing drilling in the floor rock roadways to implement drainage and outburst reduction in areas to be excavated or mined in outburst coal seams. In order to give full play to the drainage and outburst reduction effect of interlayer drilling, integrated “drilling, cutting and punching” anti-reflection measures are generally implemented in the coal hole section of interlayer drilling. The status quo of the existing technology is: the drill pipes used are generally grooved drill pipes, ribbed drill pipes, three-edged grooved drill pipes or three-e...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems existing in the prior art. The present invention provides a blowout prevention hole drilling, cutting and punching drilling tool for outburst coal seam drilling, aiming to solve the problem of drilling through the drilling through the innovative design of the drilling tool in the hole. In the process of cutting and punching, the problem of spray hole gas exceeding the limit can be improved to improve the safety and controllability of drilling, cutting and punching operations through layer drilling

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