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A method of controlling coal mine gas penetration and an aerodynamic sound wave generating device

A technology of sound wave generation and coal mine gas, which is applied in the fields of coal seam gas mining, coal mine safety, and coal mine gas drainage. Concentration and extraction volume, effect of increasing efficiency

Active Publication Date: 2018-05-29
贾剑
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technical measures have disadvantages such as high engineering cost, strong damage to coal, easy to cause secondary disasters, and cracks to close with the increase of ground stress.

Method used

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  • A method of controlling coal mine gas penetration and an aerodynamic sound wave generating device
  • A method of controlling coal mine gas penetration and an aerodynamic sound wave generating device
  • A method of controlling coal mine gas penetration and an aerodynamic sound wave generating device

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] This method of controlling coal mine gas penetration includes the following steps:

[0018] (1) Drill a number of boreholes in areas where the coal mine has not extracted gas;

[0019] (2) Put the sound wave generator into the position of the designated depth under the borehole, the wavelength of the sound wave emitted by the sound wave generator is λ, and the designated depth is 1 / 4λ~1 / 2λ;

[0020] (3) Activate the sound wave generator to generate sound waves with a frequency of 30 to 500 Hz and a sound level of 70 dB or more to form a large amount of free gas.

[0021] In order to verify the relationship between the frequency of the sound wave generator and the amount of gas penetration, the following tests were performed.

[0022] Test 1. The desorption effect test of coal sample gas under frequency disturbance of 30~500HZ

[0023] (1) Test location and sampling process

[0024] The test site is the N2103 Jiaoshun tunneling face of Yuwu Coal Industry. Under the premise of verify...

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Abstract

Disclosed is a method for controlling gas penetration in coal mines, which can avoid large-scale damage to the strength of coal bodies, enhance the activity of gas molecules and accelerate desorption, thereby increasing the efficiency of coal seam gas drainage, increasing the concentration and amount of gas drainage in coal seams, and ensuring Coal mining activities are not threatened by gas gushing. It includes the following steps: (1) Drilling a number of boreholes in the unextracted gas area of ​​the coal mine; (2) Putting the sound wave generating device into the position of the specified depth under the borehole, the wavelength of the sound wave emitted by the sound wave generating device is λ, and the specified The depth is 1 / 4λ~1 / 2λ; (3) Start the sound wave generating device to make it generate sound waves with a frequency of 30~500Hz and a sound level of 70dB or more, thereby forming a large amount of free gas. Also provided is an aerodynamic sound wave generating device using the method for controlling coal mine gas penetration.

Description

Technical field [0001] The invention belongs to the technical fields of coal mine safety, coal mine gas drainage, and coal seam gas mining, and specifically relates to a method for controlling coal mine gas penetration and a pneumatic acoustic wave generating device using the method. Background technique [0002] Coal resources are currently my country's main energy source. Even with the advancement of science and technology and the development of energy-saving technology, the total coal consumption in the country is still showing a growth trend. By 2020, the total domestic coal consumption demand will exceed 2.5 billion tons. However, with the increase in coal seam mining depth and the acceleration of mining speed, coal mine safety accidents occur frequently, especially coal mine gas disasters. Coal mine gas disasters pose a huge threat to the life and property safety of the country and people. The prevention and control of coal mine gas disasters has become a necessary measure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/16E21F7/00B06B1/20
Inventor 贾剑
Owner 贾剑