Material flowing deformation disturbed effect testing system and testing method thereof

Abstract

The invention discloses an experimental system and an experimental method for the rheological disturbance effect of materials, including a constant load loading system, which implements a constant load on a test piece through a loading device, a crankshaft expansion device and a force transmission connecting rod; and also includes a disturbance loading system, The impact disturbance load and the blast disturbance load are applied to the specimen through the impact disturbance loading device and the blast disturbance loading device; it also includes a confining pressure loading system, which applies confining pressure load to the specimen through a triaxial pressure box. The triaxial pressure box includes a closed box body, and an annular capsule is arranged in the closed box body, which can realize confining pressure load on the test piece. Through the above-mentioned material rheological disturbance effect experiment system, it is possible to carry out uniaxial rheological experiment, uniaxial rheological disturbance experiment, triaxial rheological test and triaxial rheological disturbance experiment on the test piece. The structure is simple, the cost is low, and the test is accurate. It is suitable for performing rheological disturbance tests on various material test pieces, and is especially suitable for performing long-term rheological disturbance experiments on rock test pieces.

Description

technical field [0001] The invention relates to a material rheology and disturbance effect experiment technology, in particular to a pressure experiment system for testing rock rheology parameters and an experiment method using the system. Background technique [0002] Rheological properties are one of the inherent properties of rocks. Experimental testing of rocks to obtain rheological parameters of rocks can serve engineering well. The current rock rheological experiments are all carried out under static load. [0003] However, a considerable part of rock mass in engineering practice, such as chamber rock, not only bears static loads, but also bears dynamic loads. These random disturbance loads include blasting, mining car vibrations, construction disturbances in adjacent roadways, and some random stress wave shocks. Especially under the condition of deep mining, the static load of the engineering rock mass is quite large, and the rock mass in a certain range near the ca...

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Problems solved by technology

Especially under the condition of deep mining, the static load of the engineering rock mass is quite large, and the rock mass in a certain range near the cavern is already at or close to the limit state of strength. At this time, the rheological characteristics of the rock will have a considerable effect on the above random disturbance Sensitive, and the current experimental device can not carry out experimental research on the characteristics of the rock subjected to the disturbance load in the static rheological state

[0004] As far as rock rheological experiments are concerned, some of the current rheological test devices are hydraulic servo test devices, but since the rheological test itself is a long-term working environment, the hydraulic system will be unstable and the pressure will drop under long-term loading. At this time, manual continuous pressurization is required, and the load will fluctuate during the loading process; moreover, the hydraulic servo consumes a large amount of electric energy, which requires a long-term stable continuous power supply as a guarantee, and it is very difficult to achieve long-term continuous loading for several months or even years; And the cost of this device is very expensive, the cost is high

[0005] For rock rheological experiments, some are loaded with springs, but the load is limited; some are loaded by gravity, and the expansion force is transmitted through the combination of movable pulleys. The test cost is low, but the structure of the test device is complicated, the expansion multiple is small, and the test accuracy is low. lower

[0006] At present, there is no simple and effective method and instrument for the experimental test of rock rheological disturbance effect

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