Determination Method of Triaxial Compressive Strength of Rock Salt
A technology of triaxial compression and determination method, which is applied in the direction of strength characteristics, the use of stable tension/pressure to test the strength of materials, instruments, etc., can solve the problem of lack of theoretical support for the definition method, and achieve the effect of simplifying the test steps
Active Publication Date: 2021-05-28
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology
Some scholars define the stress level at which the axial strain of rock is 4% as the triaxial compressive strength of salt rock, but this definition method lacks theoretical support
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[0025] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0026] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0027] This embodiment relates to a method for determining the triaxial compression strength of rock salt, the method comprising the following steps:
[0028] a. Start the rock salt triaxial compression test, make the rock salt sample 1 into a cylinder, and fix it on a rock mechanics testing machine not shown in the figure, carry out the triaxial compression test, and collect the load of the rock salt sample 1 during the test Stress information and acoustic emission information. The acquisition method of acoustic emission information can be as follows: figure 1 As shown: by fixing a plurality of acoustic emission sensors 2 on the side of the rock salt sample 1, in order to ensure the a...
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Abstract
The invention provides a method for determining the triaxial compression strength of rock salt. The method comprises the following steps: a, starting the triaxial compression test of rock salt, collecting bearing stress information and acoustic emission information; b, counting test data, and obtaining the rock salt sample Bearing stress-time curve, acoustic emission energy rate-time curve; c. Determine the bearing stress σ of the rock salt sample 0 , using the acoustic emission energy rate-time curve and the bearing stress-time curve to obtain the bearing stress σ of the rock salt sample 0 ; d, determine the compressive strength σ of the rock salt sample, and use the bearing stress σ obtained in step c 0 as the compressive strength σ. The method for determining the triaxial compressive strength of rock salt according to the present invention, in the determination process, only needs to obtain the compressive strength of the rock salt sample from the bearing stress information and acoustic emission information in the test process, and it is not necessary For the measurement of hoop strain and axial strain of rock salt samples, test steps are reduced.
Description
technical field [0001] The invention relates to the technical field of indoor testing of geotechnical engineering, in particular to a method for determining the triaxial compression strength of rock salt. Background technique [0002] Salt rock is a special rock mass with extremely low permeability and good creep properties. It is recognized as an ideal medium for energy storage in the world. my country's salt cavern underground energy storage is in the process of large-scale construction. However, due to the special rheological characteristics of salt rock, it is difficult to test the compressive strength of rock mass during the triaxial compression test. The traditional formula for determining the triaxial compression strength of rock is: P=F / S. [0003] In the formula: P is the compressive strength of the rock mass, in MPa; F is the maximum destructive force, in KN; S is the stress-bearing cross-sectional area, in square millimeters. During the failure process of three-...
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IPC IPC(8): G01N3/08G01N29/14
CPCG01N3/08G01N29/14G01N2203/0019
Inventor 李浩然董志凯刘博欧阳作林侯兆霞陈明义范玲玲
Owner SHIJIAZHUANG TIEDAO UNIV