Hard rock brittleness evaluation method and device, storage medium and equipment

An evaluation method and brittleness technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of few parameters, complex value selection methods, low precision, etc., achieve convenient value selection, fewer test types, and avoid one-sidedness Effect

Pending Publication Date: 2022-08-05
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology

Common brittleness indicators generally show the following deficiencies: first, there are few parameters, which can only reflect the influence of a certain aspect; second, there are many parameters, but the value method is complicated and the accuracy is low

Method used

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  • Hard rock brittleness evaluation method and device, storage medium and equipment
  • Hard rock brittleness evaluation method and device, storage medium and equipment
  • Hard rock brittleness evaluation method and device, storage medium and equipment

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Embodiment Construction

[0042] The present embodiment is a method for evaluating the brittleness of hard rock, which specifically includes the following steps:

[0043] S1. Obtain the elastic modulus E, Poisson's ratio v, and crack initiation strength σ of the target rock to be evaluated ci , peak intensity σ f , uniaxial tensile strength σ t , uniaxial compressive strength σ c , the crack growth volumetric strain ε corresponding to the peak stress cgf and elastic volume strain ε vef .

[0044] Select representative samples, perform rock tensile test, uniaxial compression test, or conventional triaxial compression test (when it is necessary to evaluate the brittleness characteristics of rocks under different confining pressures), obtain the test full stress-strain curve, and record the sample Destruction features (such as figure 1 shown).

[0045] According to the test stress-strain curve, the characteristic parameters of each representative rock sample are obtained, including the tensile stre...

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PUM

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Abstract

The invention relates to a hard rock brittleness evaluation method and device, a storage medium and equipment. The method is suitable for underground engineering. According to the technical scheme, the method for evaluating the brittleness of the hard rock is characterized by comprising the following steps: acquiring the elastic modulus, Poisson's ratio, crack initiation strength, peak strength, uniaxial tensile strength, uniaxial compressive strength, fracture expansion volume strain and elastic volume strain of a rock to be evaluated; and determining a brittleness evaluation index of the rock according to the hard rock brittleness evaluation model. A hard rock brittleness evaluation device is characterized by comprising a parameter acquisition module used for acquiring the elastic modulus, Poisson's ratio, crack initiation strength, peak strength, uniaxial tensile strength, uniaxial compressive strength, fracture expansion volume strain and elastic volume strain of a rock to be evaluated; and the brittleness evaluation module is used for determining brittleness evaluation indexes of the rock according to the hard rock brittleness evaluation model.

Description

technical field [0001] The invention relates to a method, device, storage medium and equipment for evaluating the brittleness of hard rock. Applicable to the field of underground engineering. Background technique [0002] In underground engineering, brittleness is an important index to characterize rock drillability. In high in-situ stress environment, brittleness is also an important factor affecting high in-situ stress damage such as rock bursts and ganglia. [0003] Brittleness is an inherent property of rock when it is damaged by force. Its characteristic is that the compressive strength is much greater than the tensile strength, and the ultimate strain value at failure is extremely small. The existing rock brittleness index evaluation methods mainly construct evaluation indexes from the following aspects: strength indexes, including tensile strength, compressive strength, residual strength, crack initiation strength; shear strength parameters; deformation indexes, incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0019G01N2203/0075
Inventor 李良权陈建林万祥兵方丹
Owner POWERCHINA HUADONG ENG COPORATION LTD
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