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Method and device for pre-pumping coal body gas by concussion fracture of high-pressure gas

A technology of impact rupture and high-pressure gas, which is used in gas discharge, safety devices, mining equipment, etc., can solve the problem of the system without a walking mechanism, and achieve the effect of improving the gas drainage effect, enhancing the permeability, and improving the rupture effect.

Active Publication Date: 2009-11-18
CCTEG SHENYANG RES INST
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AI Technical Summary

Problems solved by technology

At present, the electric control system of the high pressure steel line and air breaking system is intrinsically safe according to the Hungarian standard, and the system has no traveling mechanism

Method used

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  • Method and device for pre-pumping coal body gas by concussion fracture of high-pressure gas
  • Method and device for pre-pumping coal body gas by concussion fracture of high-pressure gas

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Embodiment Construction

[0016] Figure number

[0017] In the figure 1. Electric control system, 2. High-pressure air compressor, 3. High-pressure air compressor travel shaft wheel, 4. High-pressure control valve, 5. High-pressure pipeline, 6. High-pressure accumulator, 7. High-voltage trigger, 8. High-pressure gas impact nozzle, 9. Coal wall, 10. Control drilling, 11. Impact fracture drilling, 12. Impact fracture impact range of the first stage, 13. Impact fracture impact range of the second stage, a. Retain the coal wall thickness.

[0018] figure 1 . In the first embodiment of the present invention shown, a high-pressure gas impact fracture coal gas pre-extraction equipment includes an electric control system 1 electrically connected to a high-pressure air compressor 2, and a high-pressure control valve connected to the high-pressure air compressor 2 The high-pressure pipeline 5 of 4 is connected with a high-pressure accumulator 6 with a high-pressure trigger 7 and a high-pressure gas impact nozz...

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Abstract

The invention discloses a method for pre-pumping coal body gas by concussion fracture of high-pressure gas, which comprises the step of boring a concussion fracture borehole in a coallayer. The method is characterized in that after a plurality of control boreholes are bored on the periphery of the concussion fracture borehole, the concussion fracture borehole is subjected to coal body concussion fracture, wherein the control boreholes can serve as gas drainage boreholes. The method and the device have the advantages that the periphery of the concussion fracture borehole is provided with the control boreholes, the coal body fracture effect is improved during the concussion fracture of the coal body, the ventilation property of the fractured coal body is enhanced, and the gas pumping effect is improved.

Description

technical field [0001] The invention belongs to the technical field of gas drainage in coal seams, and in particular relates to gas drainage technology and equipment for high-pressure gas impact fracture coal bodies. Background technique [0002] At present, domestic coal seam gas drainage technologies mainly include ① borehole gas drainage technology, that is, high-level roadway drilling or coal seam horizontal long drilling or cross-distributed holes or grid-type through-bed drilling to drain coal seam gas; ② special enhanced gas drainage technology Explosive technology, that is, explosive pre-splitting blasting advance strengthening or hydraulic fracturing, fracturing pressure relief or hydraulic blasting or hydraulic slit or hydraulic reaming or cutting pulse, drilling controlled blasting to drain coal seam gas. Drilling pressure relief gas drainage technology is generally related to the number of drilling holes, and to achieve a good drainage effect often requires drill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 王魁军高坤李铁良曹垚林沈维栋王宇鹍王路军李守国
Owner CCTEG SHENYANG RES INST
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