Hollow rock sample radial seepage test device and test method based on acoustic emission technique

Abstract

The invention discloses a hollow rock sample radial seepage test device and test method based on acoustic emission technique. The test device is composed of an axial loading system, an acoustic emission system, a water pressure supply system and a radial seepage system; the axial loading system is acted on the radial seepage system, the water pressure supply system providing periphery water pressure and internal periphery water pressure for the hollow rock sample; the acoustic emission system is used for researching damage and crack extension rule in the rock sample damage process; when the device is specifically applied, the radial seepage test of the hollow rock sample with different bonding strengths can be developed, and the damage mechanism and radial seepage rule under the stress-seepage coupling effect can be researched. The invention further provides a hollow rock sample radial seepage test method based on the acoustic emission technique, specifically, the axial loading systemis used as a power source and the water supply system to perform acoustic emission test and radial seepage test for the water pressure source, and the test device has the advantages of being multifunctional and stable.

Description

technical field [0001] The invention relates to a radial seepage test device and a test method, in particular to a hollow rock sample radial seepage test device and a test method based on acoustic emission technology suitable for research on hollow rock sample radial seepage and damage mechanism. Background technique [0002] The rapid development of my country's economy has a strong demand for mineral resources. Under the condition that the shallow resources are gradually exhausted, in order to meet the needs of the rapid development of the national economy for mineral resources, the mining and utilization of mineral resources are gradually developing to the deep. Due to the complex hydrogeological conditions of most mines in my country, a large number of mineral resources cannot be exploited normally due to the impact of water inrush disasters. In the mining process of deep underground mineral resources, underground roadways and stopes are subjected to high osmotic pressur...

AI Technical Summary

Problems solved by technology

[0004] Water inrush in underground roadway can be similarly simulated as the radial seepage model of hollow rock sample. The radial seepage test of hollow rock sample has been designed with relatively mature test equipment and scheme, but the condition of two-way osmotic pressure is not considered

In recent years, acoustic emission technology has been widely used in rock mechanics tests to study the evolution of rock damage state and the development of rock internal cracks. Experts at home and abroad have made many remarkable achievements in the application of acoustic emission technology, but there is Considering the application of acoustic emission technology in the field of seepage research

Under engineering conditions with high osmotic pressure and high ground stress, a single test method cannot reveal the internal mechanism of structural instability failure of rock mass and water inrush disasters of roof and floor

At present, there are still many deficiencies in the research on rock mass instability mechanism and water inrush mechanism, and it is difficult to prevent and control water inrush accidents on the roof and floor of underground mines.

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