Air pressure stabilizing system and method for controlling pore water pressure in coal-rock mass creep test

A technology of creep test and pore water pressure, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of difficult air pressure regulation, achieve simplified experimental devices, convenient and fast operation process, The effect of improving experimental efficiency
CN110987604AActive Publication Date: 2020-04-10TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2020-04-10

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Abstract

The invention relates to an air pressure stabilizing system and a method for controlling pore water pressure in a coal-rock mass creep test, and belongs to the technical field of coal seam tests. Thesystem is mainly composed of a gas cylinder, an outlet pressure reducing valve, an automatic regulating solenoid valve, a sensor, a signal processor, a pneumatic valve, an exhaust port and a reactionkettle. According to the system, the thought of feedback regulation is applied, an air pressure signal in the reaction kettle is transmitted through a sensor, and the air pressure signal is convertedinto a control instruction through a signal processor to control opening and closing of the automatic regulating solenoid valve, and the automatic regulating solenoid valve controls opening and closing of the pneumatic valve, and then the pressure in the reaction kettle is controlled. The system is reliable in operation, simple in structure and convenient to operate, and can provide stable confining pressure for a creep experiment of the coal and rock mass under the action of using water as a medium.
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Description

technical field

[0001] The invention belongs to the technical field of coal seam tests, and specifically relates to an air pressure stabilization system and method for controlling pore water pressure in creep tests of coal and rock mass, which is suitable for creep tests under low confining pressure, and realizes automatic supply and control of confining pressure. The release ensures the stability of the pore water pressure. Background technique

[0002] Creep refers to the phenomenon that deformation continues to increase slowly with time without increasing stress. Many geological phenomena in nature show that even if the temperature and confining pressure are not high, the stress difference is not large, but because the stress acts for a very long time, there is a phenomenon of continuous deformation with time. In structural geology, an increasing, usually slow, deformation in solid rock under long-term small and constant stresses. The slow, gradual, continuous and non-r...

Claims

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