Gas-containing coal hydrofracture-induced dynamic damage simulation monitoring device and method

A technology of hydraulic fracturing and monitoring device, which is applied in the direction of applying stable tension/pressure to test the strength of materials and using sonic emission technology for material analysis, etc., to achieve the effect of simple monitoring method, simple structure and easy operation.

Inactive Publication Date: 2015-01-21
ANHUI UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, there is no domestic monitoring device and method for hydraulic fracturing dynamic damage of gas-containing coal, so it is urgent to develop a monitoring device and method for dynamic damage of gas-containing coal hydraulic fracturing under different gas pressures

Method used

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  • Gas-containing coal hydrofracture-induced dynamic damage simulation monitoring device and method
  • Gas-containing coal hydrofracture-induced dynamic damage simulation monitoring device and method

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Embodiment Construction

[0027] The technical scheme of the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0028] Such as figure 1 , figure 2 As shown, a gas-containing coal body hydraulic fracturing induced dynamic damage simulation monitoring device includes a sealed cavity for accommodating a cubic coal sample. The sealed cavity includes a cavity base 1, a cavity side wall 2, a sealing cover 3 and The tongue depressor 4 passes through the sealing cover 3 to apply vertical pressure to the cubic coal sample. The monitoring device also includes an acoustic emission monitoring unit, a confining pressure unit, a hydraulic fracturing unit and a gas injection unit. The confining pressure unit is connected to the seal Confining pressure is applied to the cubic coal sample in the cavity, the gas injection unit is connected to the sealed cavity to inject gas into the cubic coal sample, the hydraulic fracturing unit is connected to the seal...

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Abstract

The invention relates to the technical field of experimental devices, and discloses a gas-containing coal hydrofracture-induced dynamic damage simulation monitoring device and method. The device comprises a sealed cavity for containing a cubic coal sample, an acoustic emission monitoring unit, a confining pressure unit, a hydrofracture unit and a gas injection unit, wherein the confining pressure unit extends into the sealed cavity to apply confining pressure onto the cubic coal sample; the gas injection unit extends into the sealed cavity to inject gas into the cubic coal sample; the hydrofracture unit extends into the sealed cavity to perform hydrofracture on the cubic coal sample; and the acoustic emission monitoring unit extends into the sealed cavity to acquire an acoustic emission signal from the cubic coal sample. The device can be used for monitoring and analyzing gas-containing coal hydrofracture-induced dynamic damage with different gas pressure and different coal intensities under different pressure conditions. The device is simple in structure, simple in monitoring method and easy to operate.

Description

Technical field [0001] The invention relates to the technical field of experimental devices, in particular to a dynamic damage simulation monitoring device and method induced by hydraulic fracturing of gas-containing coal bodies. Background technique [0002] Most of our country’s mining areas have entered deep mining. Deep coal seams have greater ground stress, lower coal seams’ air permeability and greater difficulty in gas drainage. Downhole hydraulic fracturing technology has the advantages of large fracturing range, large pressure relief range, and obvious anti-reflection effect. Combined with my country's current technical and economic conditions, hydraulic fracturing coal seam gas permeability enhancement technology is one of the most economical gas disaster prevention and control technical measures. At the same time, hydraulic fracturing technology is also one of the most important technical measures to improve permeability and water and gas conductivity for protective la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N29/14
Inventor 马衍坤刘泽功刘静蔡峰成云海刘健王维德汪斌斌
Owner ANHUI UNIV OF SCI & TECH
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