A device for preventing coal-rock dynamic disasters by high-pressure pulsating water injection

A technology for power disasters and high-pressure water supply, applied in safety devices, gas discharge, mining equipment, etc., can solve the problems of complex process, unsatisfactory anti-outburst and anti-impact effects, etc., achieve simple process, improve safety production coefficient, prevent good effect

Inactive Publication Date: 2011-12-28
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0004] Although the above-mentioned prior art has solved some problems to a certain extent and reduced the occurrence of coal-rock dynamic disasters, it has at least the following disadvantages: the process is relatively complicated, and the anti-burst and anti-shock effects are not ideal. How to further improve the water injection technology and improve the prevention The sudden and anti-shock effect just becomes the problem to be solved in the present invention

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  • A device for preventing coal-rock dynamic disasters by high-pressure pulsating water injection

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Embodiment Construction

[0015] The method for preventing and controlling coal-rock dynamic disasters by high-pressure pulsating water injection based on the present invention, firstly, drill holes into the mine coal seam from the mine roadway, usually two holes; After the high-pressure water enters the coal seam, it can not only penetrate into different cracks and pores, increase the wettability of the coal body, but also make the cracks continue to penetrate and expand, expand the wetting radius, and change the physical and mechanical properties of the coal seam. At the same time, the periodic The pulsating high-pressure water can also produce repeated effects of "expansion-contraction-expansion" on coal cracks and pores, reducing or eliminating the risk of coal seam outburst. During water injection, the maximum pressure of the pulsating high-pressure water is 25MPa, and the pulsating low pressure and high pressure can be adjusted to ensure the prevention effect and safe use of coal seam water inject...

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Abstract

The invention discloses a method and equipment for preventing and controlling coal-rock dynamic disasters by high-pressure pulsating water injection, including a high-pressure water supply system, a pulse pressure water output system and a pneumatic frequency modulation control system. Pulse injection into the borehole. Injecting pulsating high-pressure water into the coal seam, that is, injecting water whose pressure changes periodically, changes the water injection pressure to make water infiltrate into different cracks and pores, so as to change the mechanical properties of the coal body to the greatest extent, and use pulsating high-pressure water to dissociate High-pressure gas discharge reduces the gas content in the coal body, improves safety, and reduces or eliminates the risk of coal seam outburst and impact. The process is simple and the control effect is good, and it is suitable for preventing and controlling coal-rock dynamic disasters in various coal mines.

Description

technical field [0001] The invention relates to a technology for preventing and controlling coal mine safety production, in particular to a device for preventing and controlling coal-rock dynamic disasters by high-pressure pulsating water injection. Background technique [0002] In the process of coal mine production, the occurrence of coal and rock dynamic disasters such as coal and gas outburst and impact mine pressure often cause a large number of casualties and bring great mental and psychological pressure to mine workers. At the same time, it will also affect the safety of coal mines economic benefits. In recent years, with the increase of mine mining depth and intensity, coal-rock dynamic disasters have increased year by year and become more serious, which has become a problem that needs to be solved first in current coal mines. [0003] In the existing mine outburst prevention technology, many hydraulic measures are being promoted and applied, which are characterized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00
Inventor 聂百胜何学秋
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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