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Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device

A high-pressure gas, cyclic pulse technology, used in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc.

Inactive Publication Date: 2015-02-18
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, deep hole blasting has the disadvantages of generating sparks and being unable to recharge explosives, and hydraulic fracturing crack propagation is sensitive to ground stress and coal seam, which makes the anti-reflection effect of the above-mentioned coal seam strengthening and anti-reflection technology unsatisfactory, and the process of the above-mentioned technology quite complicated

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  • Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] like figure 1 As shown, a low-permeability coal high-pressure gas circulation pulse fracturing and anti-permeability experimental device includes a coal sample, a blasting cylinder mechanism, a three-axis loading system, a high-pressure gas impact system, and a coal permeability measurement system;

[0023] The coal sample is composed of a coal block 1 and a concrete protective layer 2, and the concrete protective layer 2 is arranged on the side walls around the coal block 1;

[0024] Described blasting cylinder mechanism is made up of upper and lower cylinder head, cylinder barrel 6 and upper and lower pressure heads, and cylinder barrel 6 is arranged vertically, and lower cylinder head 8 is arranged at the bottom of cylinder barrel 6, and is arranged at the top of cylinder barrel 6. There is an upper cylinder head 7, and the...

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Abstract

The invention relates to a low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device belonging to the field of low-permeability coal seam reinforcement anti-reflection technology. The coal can be impacted by high-pressure gas for a plurality of times in a circulating way through a power electric induction electronic control valve so as to be fractured for increasing permeability; and the device is simple to operate, low in cost and obvious in anti-reflection effect. The low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device comprises a coal sample, a blasting cylinder mechanism, a triaxial loading system, a high pressure gas impact system and a coal permeability measurement system, wherein the coal sample consists of coal briquettes and a protecting layer; the blasting cylinder mechanism consists of an upper cylinder cover, a lower cylinder cover, a cylinder barrel, an upper pressure head and a lower pressure head; the triaxial loading system consists of an axial compression loading system and a confining pressure loading system; the high pressure gas impact system consists of a gas explosion gun, the power electric induction electronic control valve, a high-pressure gas storage tank, a multi-ported valve, an air compressor and a gas source cylinder; and the coal permeability measurement system comprises a methane gas cylinder, a water tank and a measuring cylinder arranged outside the blasting cylinder mechanism.

Description

technical field [0001] The invention belongs to the technical field of enhancement and anti-reflection of low-permeability local coal seams, in particular to a low-permeability coal body high-pressure gas circulation pulse cracking and anti-permeability experimental device. Background technique [0002] The strengthening and anti-permeability technologies of low-permeability coal seams in my country mainly include deep hole blasting and hydraulic fracturing. However, deep hole blasting has the disadvantages of generating sparks and being unable to recharge explosives, and hydraulic fracturing crack propagation is sensitive to ground stress and coal seam, which makes the anti-reflection effect of the above-mentioned coal seam strengthening and anti-reflection technology unsatisfactory, and the process of the above-mentioned technology quite complicated. Contents of the invention [0003] Aiming at the problems existing in the prior art, the present invention provides a low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 赵宝友贾廷贵张立新李刚
Owner LIAONING TECHNICAL UNIVERSITY
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