Toroidal fissured rock sample, MHC coupled seepage experimental device of sample and use method of device

Abstract

The invention discloses an MHC (mechanical-hydrological-chemical) coupled seepage experimental device for testing a toroidal fissured rock sample. The device is provided with a pressure stabilizing mechanism located above the experimental device and used for providing experimental pressure, a loading head located below the pressure stabilizing mechanism and used for transferring the pressure, a confining pressure chamber located below the loading head and providing liquid confining pressure and an axial pressure experimental environment for the sample, and a force transmission column located below the confining pressure chamber, wherein the confining pressure chamber is provided with a vertical annular confining pressure chamber side wall; an upper sealing cover and a lower sealing cover are arranged above and below the confining pressure chamber side wall respectively and provided with through holes respectively; the two through holes are coaxial; at least one solution flowing hole is formed in the confining pressure chamber side wall; and the force transmission column is internally provided with a pipeline I. Each sample is arranged in a corrosive solution with certain pressure, the pressure of the solution provides the confining pressure and an inflow water head, and a loading device and a gas storage tank pressure stabilizing device provide long-duration loads for a creeping test at the two ends of the sample.

Description

technical field [0001] The invention relates to a rock test piece seepage test device, in particular to an MHC-coupled annular crack rock test piece seepage test device. Involves the measurement of patent classification number G01; test G01N to test or analyze the characteristics of materials G01N15 / 00 test particles by means of the determination of chemical or physical properties of materials; test the permeability of porous materials, pore volume or pore surface area G01N15 / 08 test the properties of porous materials Permeability, pore volume or pore surface area. Background technique [0002] Rock mass is a complex medium rich in fractures, and is under the action of complex geostress and groundwater environment. It is subjected to complex effects of stress and water physics and chemistry, which has a great impact on the mechanical behavior and stability of rock mass. [0003] The first is the problem of seepage-stress coupling. For example, the failure of the famous Teko...

AI Technical Summary

Problems solved by technology

However, looking at the existing indoor test equipment, there are still some limitations in the seepage test of rock mass fissures, mainly as follows: 1) Most of the seepage-stress-chemical coupling test equipment is complex in structure and expensive, which leads to high test costs

2) The current seepage-stress-chemical coupling test generally only uses one specimen for one test, and the efficiency is relatively low due to the long operation time (usually months or even years) for complex rheological tests

However, seepage conditions in actual rock mass engineering are varied and quite complicated.

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