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Coal seam water injection system

A coal seam water injection and coal seam technology, applied in safety devices, mining equipment, earthwork drilling and mining, etc., can solve problems such as increased equipment operation and maintenance requirements, inability to achieve high air permeability, limited pressure, etc.

Active Publication Date: 2015-02-25
NAT ENG RES CENT FOR GAS CONTROLLING OF PINGAN MINE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are at least the following problems in the prior art: First, static pressure water injection is only suitable for coal seams with good air permeability, and the use of static pressure water injection cannot realize water injection in coal seams with poor air permeability; secondly, the pressure provided by pressurized water injection by high-pressure water pumps is limited, And as the pressure of the water injection pump increases, the operation and maintenance requirements of the equipment also increase accordingly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] figure 1 It is a schematic diagram of the coal seam water injection system provided by Embodiment 1 of the present invention. Embodiment 1 of the present invention provides a coal seam water injection system, which includes: a pulse power subsystem 1 and a water injection subsystem 2; the water outlet 21 of the water injection subsystem 2 communicates with the coal seam 3 to be water injected in the set area, so as to inject water into the coal seam to be water injected 3. Water injection; the liquid outlet 11 of the pulse power subsystem 1 communicates with the coal seam 3 to be water injected in the set area, so as to provide hydraulic pulses to the coal seam 3 to be water injected in the area.

[0055] There is no limitation on how the pulse power subsystem and the water injection subsystem are connected to the coal seam to be water injected. They can be connected to the coal seam to be water injected in the same area through two pipes, or connected to the coal seam ...

Embodiment 2

[0063] figure 2 It is a schematic diagram of the coal seam water injection system provided by Embodiment 2 of the present invention. Embodiment 2 of the present invention is based on the technical solution of Embodiment 1. Preferably, the coal seam water injection system also includes a water injection pipe 6. The pipe at the end of the water injection pipe 6 outlet is clamped in the coal seam 3 to be water injected. The inlet of the water injection pipe 6 61 is located outside the coal seam 3 to be injected with water, and the inlet 61 communicates with the water outlet 21 and the liquid outlet 11 respectively.

[0064] The pulse power subsystem and the water injection subsystem are connected to the coal seam to be injected through the same water injection pipe, which can simplify the structure of the whole system. In practical applications, sealing materials can also be arranged around the water injection pipe to avoid the influence of cinder on the water injection pipe. ...

Embodiment 3

[0070] image 3 It is a schematic diagram of the coal seam water injection system provided by Embodiment 3 of the present invention. Embodiment 3 of the present invention is preferably based on the technical solutions of the foregoing embodiments. The water injection subsystem 2 comprises a static pressure water injection pipe 22 and a static pressure pump 23; the water outlet of the static pressure water injection pipe 22 is used as the water outlet 21 of the water injection subsystem; A pressure pump (not shown) is in communication; the hydrostatic pressure pump is used to pump water into the hydrostatic injection pipe 22 .

[0071] After adding the pulse power subsystem, the structure of the water injection subsystem will not be affected. In addition, the pulse power subsystem is set up, and the existing water injection subsystem can be used to inject water into the coal seam, and the water injection effect is good.

[0072] In practical application, a one-way valve 18 is...

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Abstract

The invention discloses a coal seam water injection system which comprises a pulse power subsystem and a water injection subsystem, wherein a water outlet of the water injection subsystem is communicated with a coal seam to be subjected to water injection of a set area so as to inject water into the coal seam to be subjected to water injection; and a liquid outlet of the pulse power subsystem is communicated with the coal seam to be subjected to water injection of the set area so as to provide hydraulic pulse to the coal seam to be subjected to water injection. According to the coal seam water injection system, the water injection of the coal seam with poor air permeability can be effectively realized, and the coal seam water injection system has the advantages of simple water injection operation and good effect.

Description

technical field [0001] The invention relates to water injection technology, in particular to a coal seam water injection system. Background technique [0002] More than 90% of the gas in the coal seam exists in the pores and fissures of the coal seam in the form of adsorption. In the unmined or undisturbed coal seam, 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 seam, and migrates to the roadway or the working surface through the pores, micro-cracks, and fissures in the coal seam. At present, most coal mines use high-power shearers and fully-mechanized top-coal caving mining technology. In the case of low water content in each layer, the amount of coal dust will increase, which not only poses a threat to safe production, but also deteriorates the production environment. directly damage the he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/02
Inventor 袁亮张景松刘冠学薛俊华余国锋张明吴志坚卢平
Owner NAT ENG RES CENT FOR GAS CONTROLLING OF PINGAN MINE
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