Electrical parameter test system of tri-axial compression gassy coal and rock masses

Abstract

The invention relates to an electrical parameter test system of tri-axial compression gassy coal and rock masses, the problems that the electrical parameters of coal and rock masses in a gassy state can not be detected, seepage of filled gas is uneven in the coal and rock masses, and when confining pressure is loaded, oil leaks in a device, and the pressure can not be stable are effectively solved. The technical scheme is that a sealing cylinder is added, a rubber sleeve in a special shape serves as the device for separating a test sample and hydraulic oil, when the rubber sleeve bears the confining pressure, two ends of the rubber sleeve expand towards a seal pot cover to play a role in sealing, and the confining pressure is stabilized. A circular steel gasket is added between an insulating plate and a pressure head, one face of the gasket is in a concave shape, a row of small holes are formed in the gasket at intervals of each 45 degrees, the small holes are evenly distributed in the whole circular gasket, the circular gasket is used for distributing gas evenly on the end face of the test sample and enabling the gas to permeate the test sample evenly along with the filling of the gas. The electrical parameter test system of the tri-axial compression gassy coal and rock masses is simple and novel in structure and easy to manufacture, the used rubber sleeve is durable and convenient to use, and good in sealing effect and is a major innovation of various parameter and the property test of loaded gassy coals, and the effect is significant.

Description

A technical field [0001] The invention relates to the coal industry, and relates to a system for testing the electrical properties of a loaded gas-containing coal rock mass. Two background technology [0002] Most of the existing electrical parameter tests of coal and rock mass are unloaded experiments under the condition of no gas, which cannot simulate the actual state, that is, the change law of the electrical parameter of the coal rock mass during the triaxial compression and fracture process under the condition of gas; How to stabilize the radial pressure (confining pressure) is also a big problem when testing the loaded gas-containing coal and rock mass; when gas is charged into the coal and rock mass, the gas at the gas inlet cannot evenly fill the end face of the sample , it is easy to cause uneven gas seepage and uneven adsorption. Three invention content [0003] The purpose of the present invention is to provide a three-axis compression gas-containing coal rock...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing electrical parameter tests of coal and rock mass are unloaded experiments under the condition of no gas, which cannot simulate the actual state, that is, the change law of the electrical parameter of the coal rock mass during the triaxial compression and fracture process under the condition of gas; How to stabilize the radial pressure (confining pressure) is also a big problem when testing the loaded gas-containing coal and rock mass; when gas is charged into the coal and rock mass, the gas at the gas inlet cannot evenly fill the end face of the sample , it is easy to cause uneven gas seepage and uneven adsorption

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