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Air Leakage Prevention and Control Device for Underground Goaf

A technology for gobs and adding devices, which is applied in mining devices, safety devices, mine/tunnel ventilation, etc., can solve the problems of low expansion ratio of two-phase foam, slow foam covering speed, and large system pressure loss, etc., to achieve Improve the accuracy of material addition, increase the pressure and reduce the effect of pressure loss

Active Publication Date: 2020-10-16
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this invention, the pressure loss of the system is relatively large, and the expansion ratio of the two-phase foam produced is relatively low. In actual use, there are disadvantages of small foaming volume and slow foam coverage speed.

Method used

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  • Air Leakage Prevention and Control Device for Underground Goaf
  • Air Leakage Prevention and Control Device for Underground Goaf
  • Air Leakage Prevention and Control Device for Underground Goaf

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Embodiment Construction

[0028] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0029] see figure 1 , the air leakage prevention and control device for underground goaf of the present invention, the device includes an air inlet joint 1, a pressure air pipe 3, a jet controller 5, a slurry inlet joint 7, a mud foam generator 10, an air flow filter 2, a diverter valve 4, a suction Liquid pipe 6, mud filter 8, mud pipe 9, air volume control valve 11, mud volume control valve 12.

[0030] The specific introduction is as follows: the target pressure air enters from the air inlet joint 1, the air inlet joint 1 is connected to the pressure air pipe 3, and the target pressure air passes through the air pressure pipe 3 through the air flow filt...

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Abstract

The invention discloses a prevention and control device for air leakage of an underground goaf. The prevention and control device comprises an air inlet joint, a compressed air pipe, an adding device,a slurry-gel foam generator, a slurry inlet joint, a grouting pipe, a liquid sucking pipe and the like. The adding device utilizes the negative pressure generated by high-speed jet, meanwhile, adds two base materials required for preparing blocking foam, and is connected in a parallel connecting mode, thus the resistance loss of operation of the prevention and control device is decreased, and a paraboloid-shaped multi-layer composite concave mesh is arranged on a fixing hole plate of the slurry-gel foam generator. The prevention and control device only takes the underground existing groutingpressure and compressed air as driving force, electrical equipment during traditional blocking foam preparation is not needed, the essential safety of using of the prevention and control device is improved, and the prevention and control device has the remarkable advantages of simple structure, high reliability and high applicability.

Description

technical field [0001] The invention relates to a mine plugging mud glue foam preparation device, which is suitable for the field of underground fire prevention and extinguishing in coal mines, especially for air leakage from high-level fissures in goafs, two air leakages, and air leakage positions behind working face frames, etc., and belongs to the technical field of mine safety engineering . Background technique [0002] The fire accidents caused by coal spontaneous combustion and the resulting regeneration accidents are one of the main disasters in the coal mining process, and the direct and indirect economic losses of coal mines and mining enterprises are as high as tens of billions of dollars every year. In recent years, there have been many large-scale accidents caused by coal spontaneous combustion in my country, such as the "3.29" accident in Jilin Babao Coal Mine and the "11.14" accident in Jiangxi Jianxin Coal Mine, etc., causing a large number of casualties and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00E21F15/10E21F17/00E21F1/08F04F5/24
CPCE21F1/085E21F15/005E21F15/10E21F17/00F04F5/24
Inventor 陆新晓薛雪赵鸿儒韩宇
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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