An automatic screw-in high-pressure water-breaking coal punching method

Abstract

The invention discloses an automatic precession type high-pressure hydraulic coal-breaking punching method. An eccentric gun head is adopted, the punching aperture can be increased, and the problem that equipment which has small flow, low pressure and small gun head caliber has small punching aperture. Cutting teeth are arranged at the front end of the gun head and can break hard coal gangue during rotation and play roles in reaming holes and increasing punching depth. A spiral surface of a precession spiral hollow tube can provide a discharge channel for slime water broken under impact, increase the displacement of the slime water and improve the punching efficiency. The spiral surface narrows the distance between a water body and a drilling wall and facilitates breaking of the drilling wall by water with residual pressure, so that reaming is realized. The large spiral type advance and retreat manner of the precession spiral hollow tube, a precession buckle, a stable track, a four-wheeled locomotive and a hydraulic motor is adopted, punching intelligence is realized, the acting unit of single part is enlarged, and underground dismounting and transportation are facilitated. Video monitoring is adopted and cooperates with remote control, unmanned operation of work faces is realized in a real sense, and safety production is realized.

Description

Technical field: [0001] The invention relates to an automatic screw-in high-pressure water-breaking coal punching method, in particular to a method for changing the stress state of surrounding rock through high-pressure hydraulic punching, realizing the development of cracks, and achieving the effect of increasing permeability. Background technique: [0002] At present, hydraulic punching technology has become an important means of coal mine outburst prevention. Especially in the mining of high-gas mines, the use of hydraulic punching anti-reflection technology can increase the radius of gas extraction, increase the amount of gas extraction, and greatly reduce the risk of coal and gas outburst. However, the existing equipment generally has the characteristics of large flow rate, high pressure, large gun tip diameter, heavy equipment, low porosity rate, and dangerous operation; some equipment with low flow rate, low pressure, and small gun tip diameter have shallow perforatio...

AI Technical Summary

Problems solved by technology

However, the existing equipment generally has the characteristics of large flow rate, high pressure, large gun tip diameter, heavy equipment, low porosity rate, and dangerous operation; some equipment with low flow rate, low pressure, and small gun tip diameter have shallow perforation depth , Difficulty in discharging coal slime, small punching hole diameter, many coal cushions in soft coal seam punching, low work efficiency, dangerous operation, etc.

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