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Test device and method for failure and instability process and dynamic permeability characteristics of pressurized rock

A technology of permeability characteristics and test equipment, which is applied in measurement equipment, permeability/surface area analysis, and analysis of solids using sound waves/ultrasonic waves/infrasonic waves. It can solve problems such as lack of theoretical and experimental research results, and achieve uniform confining pressure and simple replacement. Effect

Active Publication Date: 2018-02-27
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

However, due to the limitation of experimental equipment and test rock sample size, the research on reflecting the internal correlation between rock deformation and failure process and permeability evolution is still in its infancy, and there is a lack of systematic theoretical and experimental research results.

Method used

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  • Test device and method for failure and instability process and dynamic permeability characteristics of pressurized rock
  • Test device and method for failure and instability process and dynamic permeability characteristics of pressurized rock
  • Test device and method for failure and instability process and dynamic permeability characteristics of pressurized rock

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Embodiment Construction

[0041] The scheme of the present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0042] Such as figure 1 As shown, a large-scale confined rock failure and instability process and dynamic permeability characteristics test device is composed of a confining pressure loading module, a sample storage and water outlet module, a confined water loading module, and a signal acquisition and processing system. The test device, except for auxiliary accessories such as high-pressure oil pipes, high-pressure water pipes, outlet pipes, sealing rings, etc., is made of No. 45 steel with a certain rigidity and strength, and its inner and outer layers are coated with a certain thickness of insulating layer (polytetrafluoroethylene), such as figure 1 shown.

[0043] Such as figure 1As shown, the confining pressure loading module consists of a confining pressure cylinder 1-1, a rubber cylinder 1-2, an annular confining pre...

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Abstract

A test device and method for the failure and instability process and dynamic permeability characteristics of a confined rock, using a large-scale pressure-bearing rock permeability test device, through the stress-strain signal, acoustic emission signal and apparent resistivity signal during the failure and instability process of the confined rock Acquisition and processing of large-scale confined rock to obtain the stress-strain relationship, the number and location of acoustic emission events, and the rock apparent resistivity change law caused by the infiltration and rise of confined water in the process of large-scale confined rock failure and instability, and obtain the water-force coupling effect. The dynamic evolution law of fracture expansion, penetration and instability in the process of rock failure and its corresponding dynamic seepage characteristics. Research on rock water-force coupling failure mechanism and pressure seepage characteristics, deformation and strength characteristics of rock under water-force coupling, crack expansion, penetration and failure characteristics, and permeability evolution of confined water in the process of crack expansion-penetration-destruction law. It has important engineering value in realizing the safety belt mining in confined water.

Description

technical field [0001] The invention relates to the field of pressure-bearing rock permeability tests, in particular to a device and method for testing the failure and instability process and dynamic permeability characteristics of large-scale pressure-bearing rocks. Background technique [0002] Coal seam floor water inrush is the main form of coal mine water damage in my country, especially in North China type coal fields, mine water damage caused by floor water inrush is common and prominent. At present, 60% of mines in important coal producing areas in my country are threatened by floor karst confined water to varying degrees, and the area and severity of water damage rank first among coal mining countries in the world. In recent years, with the continuous increase of mining depth, the ground stress has shown a non-linear increase trend. Deep mining is in a complex environment of "three highs and one disturbance". More and more complicated, making the problem of floor w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N27/04G01N29/04
Inventor 孙建马衍坤成云海
Owner ANHUI UNIV OF SCI & TECH
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