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Test apparatus and test method of permeability of coal under hot and cold impact

A testing device and permeability technology, which are used in measurement devices, permeability/surface area analysis, preparation of samples for testing, etc. The effect of installation and use, ensuring continuous supply, and improving efficiency

Active Publication Date: 2017-07-04
HENAN POLYTECHNIC UNIV
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  • Description
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Problems solved by technology

In order to study the fracturing effect of temperature shock on coal, researchers have designed many devices, but there are few devices to quantitatively test the effect of coal fracturing, and there is no experimental system for testing the permeability of coal under thermal and cold shocks.

Method used

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  • Test apparatus and test method of permeability of coal under hot and cold impact
  • Test apparatus and test method of permeability of coal under hot and cold impact
  • Test apparatus and test method of permeability of coal under hot and cold impact

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Embodiment Construction

[0035] like figure 1 , figure 2 , image 3 and Figure 4 As shown, the coal permeability testing device under the thermal and cold impact of the present invention includes a thermal cooling device, a permeation device, a gas flow testing device and a gas supply device;

[0036] The heating and cooling device includes a liquid nitrogen tank 1, a hot blower 5, a cold injection pipe 4 and a heat injection pipe 9. The hot blower 5 has a fan switch 6; the liquid nitrogen tank 1 is connected to the cold injection pipe 4, and the cold injection pipe 4 is connected to the liquid nitrogen tank. 1 is connected to one end with a booster valve 2 and a liquid inlet valve 3; the heat blower 5 is connected to the heat injection pipe 9, and the heat injection pipe 9 is provided with a first cut-off valve 8;

[0037] The gas flow testing device includes an exhaust pipe 21, on which a second stop valve 22 and a digital display gas flowmeter 23 are arranged for real-time measurement of the g...

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Abstract

The invention discloses a test apparatus of the permeability of coal under hot and cold impact. The apparatus comprises a hot-cold device, a permeation device, a gas flow testing device and a gas supply device. The invention also discloses a test method of the permeability of the coal through using the test apparatus of the permeability of coal under hot and cold impact. The method comprises the following steps: 1, preparing a coal sample; 2, carrying out temperature impact comprising hot impact and cold impact on the coal sample, wherein the hot impact and the cold impact are cycled 1-10 times, and are carried out on the coal sample to generate hot and cold impact in order to damage the coal and increase the permeability of the coal sample; and 3, testing the permeability of the coal sample. The increase of the permeability of the coal is realized through hot and cold alternation, and the permeability of the destroyed coal is measured, so the permeability increase effect of above facture technology is quantitatively illustrated. The permeability increase effect of the coal by the temperature impact is analyzed by using the permeability of the coal in order to obtain an optimum temperature impact parameters, so the coal mine working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a coal permeability testing device and testing method. Background technique [0002] CBM fracturing is the core and key to the development and utilization of CBM. In recent years, coal seam fracturing has made great progress in technology and achieved ideal results in application, but some problems have also been exposed, which need to be solved urgently. It is necessary to use unconventional means (hot and cold impact) to solve the technical problems of coal bed methane development and bottlenecks, and truly realize the effect of increasing production of coalbed methane. In order to study the fracturing effect of temperature shock on coal, researchers have designed many devices, but there are few devices to quantitatively test the effect of coal fracturing, and there is a lack of an experimental system for testing the permeability of coal under thermal and cold shocks. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N1/38
CPCG01N1/38G01N15/0826H04L63/102H04L63/105
Inventor 王登科魏建平姚邦华徐向宇张宏图孙刘涛
Owner HENAN POLYTECHNIC UNIV
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