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Test method of rock aging deterioration process

A test method and technology for rock samples, which are applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, etc., can solve the problems of inability to accurately and effectively test the aging deterioration characteristics of rocks, and achieve the effect of accurate test results.

Inactive Publication Date: 2015-01-21
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In view of the above existing problems, the object of the present invention is to provide a test method for the rock aging degradation process under laboratory conditions, aiming at overcoming the inadequacy that the current rock testing method cannot accurately and effectively test the rock aging degradation characteristics, and realizing the analysis of the rock mesoscopic aging degradation process. Real-time testing of macroscopic features during degradation

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specific Embodiment

[0053] (1) After the diameters of the pressure-bearing acoustic wave transmitting probe 2 and the pressure-bearing sound wave receiving probe 5 are known to be 80 mm, the rock block is processed into a cylindrical rock sample with a diameter of 70 mm and a height of 140 mm, and then After the diameter of the acoustic wave transmitting probe 4 and the non-pressurized acoustic wave receiving probe 7 is 10 mm, two symmetrical side planes with a width of 10 mm and parallel to the axis of the cylinder are ground on both sides of the cylinder rock sample to obtain rock sample 3, processing and making rock sample 3 totally ten.

[0054] (2) Take five of the batch of rock samples 3 and carry out the instantaneous uniaxial compression test, calculate and obtain the average instantaneous value of the rock samples 3 to be subjected to the aging test to be 125MPa, and measure the average Poisson's ratio ν of the rock samples 3 =0.24 and average density ρ=2680kg / m 3 .

[0055] (3) After ...

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Abstract

The invention relates to a test method of a rock aging deterioration process. A group of unconfined acoustic emission probes and a group of unconfined receiving probes are respectively placed on two parallel lateral planes of two sides of a rock sample and continuously measure transverse wave velocity of the rock sample in an aging test process. Simultaneously, a group of pressure-bearing acoustic emission probes and a group of pressure-bearing receiving proves are respectively placed on the upper end face and the lower end face of the rock sample and continuously measure longitudinal wave velocity of the rock sample in the aging test process. With the help of a theoretical formula, the transverse wave velocity and the longitudinal wave velocity obtained through measurement are converted into transverse elastic modulus and longitudinal elastic modulus of the rock sample. At last, mathematical regression analysis is performed on the transverse elastic modulus and the longitudinal elastic modulus so as to obtain an expression function of an aging deterioration rule of the rock sample. The test method of the rock aging deterioration process enables users to effectively observe macro-features of rock in a mesoscopic deterioration process occurring with time and achieves bidirectional synchronous whole-process nondestructive measurement on aging deterioration of the rock sample.

Description

technical field [0001] The invention relates to a method for testing the aging mechanical properties of rocks, and more particularly to a method for testing the whole process of rock aging degradation under laboratory conditions, which can effectively observe the macroscopic characteristics of rocks during the mesoscopic degradation process over time. Background technique [0002] At present, my country is further increasing infrastructure construction, and the hazard of aging degradation of rocks will become one of the unavoidable "bottleneck" problems in my country's engineering construction and safe operation. (1) In terms of water resources development and utilization: my country has built nearly 100 large-scale hydropower stations, and there will be nearly 40 1,000,000-kW-class hydropower stations to be built or included in the planning, and these hydropower projects include large underground powerhouses and water tunnels The aging degradation behavior of the surrounding...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/07
Inventor 江权崔杰陈静冯夏庭
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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