Measuring device and method for rock mechanical properties based on acoustic emission detection technology

Abstract

The invention discloses a rock mechanical property testing device and method based on acoustic emission detection technology, which comprises a frame on which a sample loading chamber is arranged; a square surrounding rock sample is placed inside the sample loading chamber, and the surrounding rock The middle part of the rock sample is provided with a rock sample installation hole, and the rock sample is matched and installed in the rock sample installation hole; the confining pressure loading system is used to apply confining pressure to the surrounding rock sample in the sample loading chamber; the first The axial pressure loading system is used to separately apply axial pressure to the surrounding rock sample in the sample loading chamber; the first axial pressure loading system is used to separately apply axial pressure to the rock sample; the acoustic emission detection device is used to During the process, the acoustic emission signals generated by the surrounding rock samples and rock samples are detected and collected. By setting the independent first axial pressure loading system and the second axial pressure loading system combined with the horizontal stress loading device, the vertical pressure is applied to the horizontal and vertical directions, and then the real stress environment around the rock sample is simulated experimentally.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics testing, and in particular relates to a rock mechanics property testing device and method based on acoustic emission detection technology. Background technique [0002] Rock mechanical properties and in-situ stress distribution are the basic basis for rock engineering design, construction and safety protection. Accurate testing of rock mechanical properties and acoustic emission Kaiser points is crucial to mastering rock mechanical properties and in-situ stress conditions. The mechanical properties and acoustic emission Kaiser point of rock are not only affected by lithology but also controlled by stress and loading environment. [0003] Laboratory rock mechanics testing is the most common basic method used by experts and scholars in the field of rock engineering in the world today when conducting research on rock mechanical properties and acoustic emission testing. The specific method is:...

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Problems solved by technology

[0004] However, in the process of mechanical testing of rock, the confining pressure loading device of the rock compression experiment system provides confining pressure through the combination of sleeve and oil pressure, which can only provide uniform confining pressure; when using true triaxial loading equipment When the confining pressure is loaded, the sample is usually a square sample, and the confining pressure loading in the horizontal direction can only provide stress in two directions and cannot reflect the real stress state of the sample

[0005] In addition, due to the significant difference between the mechanical properties of the confining pressure loading equipment or the true triaxial loading plate and the test rock during the deformation and failure of the sample, neither of these two confining pressure loading methods can provide the true state of the rock during the deformation and failure process. environment, which seriously affects the accurate testing of rock mechanical properties acoustic emission Kaiser points

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