Drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device and using method thereof

Abstract

The invention discloses a drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device and a using method thereof. The drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device comprises a water jet high and low pressure switching device, a blowout control hole guide device and a gas and slag separation discharge device. The water jet high and low pressure switching device is positioned between a drill bit and a drill stem and can achieve flexible switching between low-pressure drilling and high-pressure water jet slotting and punching. The blowout control hole guide device is positioned between the drill stem and a drill hole and used for guiding water coal slag and gas sprayed out of the drill hole into the gas and slag separation discharge device. The gas and slag separation discharge device is connected with the blowout control hole guide device through a pipeline and used for separating and discharging the coal slag and the gas in a sealed environment. The complete drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device can achieve flexible switching of high and low pressure drilling, timely collects, separates and discharges the gas and slag, and is simple, reliable, easy to assemble and disassemble, capable of being used for multiple times conveniently and especially suitable for performing multiple drill hole operation at the same workplace.

Description

technical field [0001] The invention relates to the field of coal mining equipment, in particular to an integrated coal seam pressure relief and anti-reflection device for drilling, pumping and drainage and a use method thereof. Background technique [0002] At present, the hydraulic measures such as high-pressure water jet slits or punching in the local pressure relief and anti-reflection measures of coal mines often have nozzle holes during the construction process. worse. At present, the blowout-proof hole sealer commonly used in mines is just a simple three-way device. The device is not tightly sealed with the drill pipe, and the contact with the drill hole is not tight. When the gas is sprayed out of the drill hole, it will cause danger. When the spray hole is too severe, it cannot achieve the effect of eliminating gas overrun; [0003] At the same time, during the high-pressure water jet cutting or punching operations, the phenomenon of repeatedly withdrawing the dri...

AI Technical Summary

Problems solved by technology

[0002] At present, the hydraulic measures such as high-pressure water jet slits or punching in the local pressure relief and anti-reflection measures of coal mines often have nozzle holes during the construction process. worse

At present, the blowout-proof hole sealer commonly used in mines is just a simple three-way device. The device is not tightly sealed with the drill pipe, and the contact with the drill hole is not tight. When the gas is sprayed out of the drill hole, it will cause danger. When the spray hole is too severe, it cannot achieve the effect of eliminating gas overrun;

[0003] At the same time, during the high-pressure water jet cutting or punching operations, the phenomenon of repeatedly withdrawing the drill pipe, blockage of the drill bit, and pressure loss of the high-pressure water jet often occurs. One way is to upgrade the drill bit such as the integrated drill bit for drilling and cutting or drilling and punching, but The structure of the above-mentioned integrated drill bit is complicated, and the processing precision is very high, which leads to high cost and is very easy to damage; another way is to simply open a hole at the front end of the drill bit to ensure drilling, and set nozzles on the side of the drill bit to achieve slits, but such a The pressure of the high-pressure water jet will be greatly lost, and the expected cutting or punching requirements will not be met.

[0004] In addition, when the gas slag is separated, most of the drill hole is blocked by a simple baffle to prevent the water cinder sprayed from the drill hole from spraying everywhere, or it is exported by a simple water gas separation device, and cannot be discharged in time when it encounters the spray hole Gas, leading to roadway gas overrun

In addition, the separation device of the water coal separator needs to manually clean the cinder, and the connected pipeline is easy to block, causing the drainage system to fail

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