External electric filed reinforced coal sample gas desorption test method

A technology of external electric field and test method, which is applied in the direction of analysis materials and instruments, can solve the problems of low average coal seam gas extraction rate and poor desorption seepage, so as to improve gas extraction rate, strengthen penetration and flow, and reduce adsorption potential Effect

Inactive Publication Date: 2018-03-13
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0003] The average recovery rate of coal seam gas in my country is low, the desorption seepage is poor, and no extraction method that can significantly improve coal seam gas has been found. At present, there are three types of methods to improve coal seam gas desorption seepage. The first category belongs to hydraulic and blasting fracturing, drilling Mechanical methods such as slit pressure relief and mining of liberated layers, the second type is throu

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  • External electric filed reinforced coal sample gas desorption test method
  • External electric filed reinforced coal sample gas desorption test method
  • External electric filed reinforced coal sample gas desorption test method

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[0035] Example

[0036] An external electric field intensified coal sample gas desorption test method. An external electric field is applied to the coal sample during the coal sample gas emission initial velocity measurement test and the coal sample gas desorption test.

[0037] Specific, such as figure 1 with figure 2 As shown, the specific steps of the test method for determining the initial velocity of gas emission of the coal sample are as follows:

[0038] Step1. Assemble the emission device, put the coal sample into the sample bottle (10) of the gas emission initial velocity tester, set the insulating bottom plate (11) at the lower end of the sample bottle, and set the insulating bottom plate (11) corresponding to the sample bottle (10) ) Place the electrode plates (9) in the slots on both sides and fix them, connect the connection points of the electrode plates (9) to the high-voltage power supply (12) through wires (18), and then fix the protective shell plate ( 8);

[0039]...

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Abstract

The invention belongs to category of a technology of increasing the gas extraction rate by a non-mechanical method and modifying coal power, and discloses an external electric filed reinforced coal sample gas desorption test method. In the process of performing coal sample gas emission initial velocity measuring test and a coal sample gas desorption test, an external electric field is applied to the coal sample. The physical properties of the coal body and the pore fractures of the coal body are changed, the adsorption potential is reduced, gas permeation and flowing of the coal body are reinforced, and the gas extraction rate is increased. Experimental results indicate that characteristics field intensity of 1200 v/cm exists, so that the gas desorption amount is maximal and the initial desorption amount of the gas can be increased by 20 to 40 percent.

Description

technical field [0001] The invention relates to the technical field of gas drainage, in particular to a test method for gas desorption of coal samples enhanced by an external electric field. Background technique [0002] The initial velocity of gas release is one of the indicators for predicting gas outburst. Gas outburst is completed instantaneously. The ability of coal to release gas is directly related to the occurrence of outburst. Studying the gas release rate in 0-1min is of great significance to the study of coal and gas outburst. . [0003] The average recovery rate of coal seam gas in my country is low, the desorption seepage is poor, and no extraction method that can significantly improve coal seam gas has been found. At present, there are three types of methods to improve coal seam gas desorption seepage. The first category belongs to hydraulic and blasting fracturing, drilling Mechanical methods such as slit pressure relief and mining of liberated layers, the sec...

Claims

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Application Information

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IPC IPC(8): G01N7/14
CPCG01N7/14
Inventor 孟慧雷东记闫江伟陈立伟李东会张航薛群山王晨曦
Owner HENAN POLYTECHNIC UNIV
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