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High ground stress assessment method, system, device and medium

A technology of high in-situ stress and in-situ stress, applied in the direction of applying stable tension/pressure to test the strength of materials, using sonic/ultrasonic/infrasonic waves to analyze solids, measuring devices, etc. High accuracy, high efficiency, and the effect of reducing budget costs

Pending Publication Date: 2022-01-28
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the integrity of engineered rock mass under high ground stress conditions cannot be accurately assessed by acoustic testing methods

Method used

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  • High ground stress assessment method, system, device and medium
  • High ground stress assessment method, system, device and medium
  • High ground stress assessment method, system, device and medium

Examples

Experimental program
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Embodiment 1

[0047] The sonic testing method is a comprehensive method, which can comprehensively reflect the overall damage condition of the rock mass. The current national standards and internationally recommended methods all use the crack coefficient K as a characterization index of rock mass integrity. K is a value less than 1, and the closer it is to 1, the higher the integrity of the rock mass. However, under the condition of high geostress, excessive confining pressure makes the original fractures of the rock mass highly closed. With the progress of excavation and unloading, the original fractures in the rock mass unload and open and generate new unloading fractures, resulting in Deterioration occurs. Therefore, there will be an abnormal phenomenon in the engineering rock mass in a state of high ground stress. The longitudinal wave velocity of the rock mass tested in situ is greater than that of the rock mass tested in the laboratory, that is, the crack coefficient K>1, which is cal...

Embodiment 2

[0061] Such as figure 2 As shown, the present embodiment is used to provide a high ground stress evaluation system, including:

[0062] The rock mass wave velocity acquisition module M1 is used to acquire the in-situ longitudinal wave velocity of the rock mass;

[0063] The rock sample wave velocity acquisition module M2 is used to collect the longitudinal wave velocity of the rock triaxial test standard sample;

[0064] The cracking coefficient calculation module M3 is used to calculate the cracking coefficient according to the in-situ longitudinal wave velocity of the rock mass and the longitudinal wave velocity of the rock triaxial test standard sample;

[0065] The high ground stress state judging module M4 is used to judge the value of the crack coefficient, if the value of the crack coefficient is less than or equal to 1, it is determined that the rock mass is in a non-high ground stress state; if the value of the crack coefficient is greater than 1 , it is determined...

Embodiment 3

[0067] This embodiment is used to provide a kind of high ground stress assessment equipment, comprising:

[0068] processor; and

[0069] a memory in which computer readable program instructions are stored,

[0070] Wherein, the high ground stress assessment method is executed when the computer readable program instructions are executed by the processor.

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Abstract

The invention relates to a high ground stress assessment method, system, device and medium, and the method comprises the steps of obtaining the in-situ longitudinal wave velocity of a rock mass through an acoustic wave test by using an existing engineering investigation drill hole, obtaining the longitudinal wave velocity of a rock triaxial test standard sample through an indoor triaxial test and the acoustic wave test, calculating a cracking coefficient according to the in-situ longitudinal wave velocity of the rock mass and the longitudinal wave velocity of the sample so as to judge whether a wave velocity upside down phenomenon occurs, so that whether the rock mass is in a high crustal stress state or not is evaluated. Compared with a method of independently adopting the acoustic wave test outdoors, the high crustal stress state of the engineering rock mass can be evaluated more accurately. Moreover, the method makes full use of the existing exploration drill hole and rock core in engineering exploration, does not need to carry out additional trepanning test in an engineering area, and can rapidly evaluate the high ground stress state of the engineering area by comparing the acoustic test result of the exploration drill hole with the acoustic test result of the indoor triaxial mechanical test and utilizing the wave velocity upside down phenomenon, and the budget cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of high ground stress level evaluation, in particular to a high ground stress evaluation method, system, equipment and medium based on acoustic wave testing and indoor triaxial testing. Background technique [0002] The sonic testing method is a comprehensive method, which can comprehensively reflect the overall damage condition of the rock mass. However, the integrity of engineering rock mass under high ground stress conditions cannot be accurately assessed by acoustic wave testing methods. Therefore, there is an urgent need for an assessment method that can accurately assess the state of high geostress. Contents of the invention [0003] The purpose of the present invention is to provide a high ground stress evaluation method, system, equipment and medium to accurately evaluate the high ground stress state and magnitude in the engineering area. [0004] To achieve the above object, the present inventio...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/02G01N29/04G01N29/07
CPCG01N3/08G01N3/02G01N29/04G01N29/07G01N2291/011G01N2291/0232
Inventor 伍法权沙鹏单治钢李博钟振司富安薛飞
Owner SHAOXING UNIVERSITY
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