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Coal-seam high-pressure pulsating water hammer water-infusion method and apparatus thereof

A technology of water hammer and high pressure, which is applied in safety devices, earthwork drilling, mining equipment, etc. It can solve the problems that it is difficult to achieve the ideal effect, the static water pressure is limited, and the air permeability is not applicable, so as to prevent coal mine safety problems and improve Effects of productivity, safety, and wide availability

Inactive Publication Date: 2007-06-06
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the pressure of hydrostatic water is limited, so it is not suitable for coal seams with poor air permeability
Although the use of high-pressure water pumps to pressurize water injection has broadened the scope of application of normal pressure water injection, but the pressure provided by the water pump is also limited, and it is difficult to achieve the desired effect for coal seams with poor air permeability.

Method used

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  • Coal-seam high-pressure pulsating water hammer water-infusion method and apparatus thereof

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Embodiment Construction

[0012] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0013] As shown in the figure, the coal seam high-pressure pulsating water hammer water injection device consists of a high-pressure cylinder 1, a hollow pipe plunger 2, a low-pressure cylinder 3, a piston 4, a main valve core 5, a return spring 6, a trigger valve core 7, and a valve core jacket 8 , Seat nut 9, trigger spring 10, trigger push rod 11, water outlet joint 12, main spring 13 and main spring seat 14. The high pressure cylinder 1 is fixed on the top of the low pressure cylinder 3, and the main spring seat 13 is fixed on the bottom of the low pressure cylinder 3, and the high pressure cylinder 1, the low pressure cylinder 3 and the main spring seat 13 are connected as a whole with screws. The cavity of the low-pressure cylinder 3 and the main spring seat 13 is provided with a piston assembly that can move up and down as a whole. The piston assembl...

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Abstract

The present invention relates to a coal bed high-pressure pulsating water hammer water injection method and its equipment. Said high-pressure water injection equipment includes the following several portions: high-pressure cylinder body, low-pressure cylinder body and main spring seat which are successively connected together with high-pressure cylinder body, in the low-pressure cylinder body interior a piston component is set, and can be upwards and downwards moved, the top portion of said high-pressure cylinder body is equipped with a connecting hole which can be connected with water-injecting pipe, on the shell body of said low-pressure cylinder body a connecting hole is set, said connecting hole is connected with low-pressure water, in the main spring seat a main spring capable of making pistion component be reset is set, its bottom portion is equipped with trigger bar, and the upper portion of trigger bar is equipped with trigger spring. Said invention also provides the basic principle of said water hammer water injection method and its operation steps.

Description

technical field [0001] The invention relates to a high-pressure pulsating water hammer water injection method for coal seams and its device, and is especially suitable for fast and effective water injection in coal seams, especially difficult-to-inject coal seams with poor air permeability, and also for water in coal seams in coal mines, and can also be used in power plants, petroleum Scale prevention, descaling and cleaning of pressurized pipelines and equipment in chemical and other industries. Background technique [0002] More than 90% of the gas in the coal body exists in the pores and fissures of the coal body in the form of adsorption. In the unmined or undisturbed coal body, the gas maintains a dynamic adsorption equilibrium. When the coal seam is mined, the cracks in the coal seam are exposed, and the balanced gas storage state is broken. A large amount of gas is continuously desorbed from the coal body, and migrates to the roadway or...

Claims

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Application Information

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IPC IPC(8): E21F5/02
Inventor 张景松
Owner CHINA UNIV OF MINING & TECH
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