A numerical simulation method for aging degradation of mechanical properties of carbonate rock under water action

A technology of carbonate rock and numerical simulation, applied in the direction of design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve the problem of how much reduction there is no clear theoretical basis for the reduction, and the method of strength reduction cannot be reflected Carbonate rock-water interaction mechanism and other issues are beneficial to the stability evaluation of engineering rock mass and disaster mechanism analysis, and the effect of good engineering application prospects

Active Publication Date: 2019-02-15
HEBEI UNIV OF TECH
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Problems solved by technology

However, the strength reduction method cannot reflect the interaction mechanism of carbona

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  • A numerical simulation method for aging degradation of mechanical properties of carbonate rock under water action
  • A numerical simulation method for aging degradation of mechanical properties of carbonate rock under water action
  • A numerical simulation method for aging degradation of mechanical properties of carbonate rock under water action

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Embodiment 1

[0051] The mechanical property parameters of the carbonate rock (limestone) specimen obtained in the test under dry and saturated conditions are shown in Table 1. Table 2 shows the uniaxial compressive strength, tensile strength and elastic modulus of limestone after different immersion times (PH value of 4.5 under acidic conditions) obtained through laboratory tests.

[0052] Table 1 Mechanical property parameters of limestone specimens under dry and saturated conditions

[0053] σ c,dry (MPa)

σ c,wet (MPa)

σ t,dry (MPa)

σ t,wet (MPa)

E. dry (MPa)

E. dry (MPa)

2.44±0.11

1.76±0.09

0.47±0.02

0.33±0.06

315±100

149±33

[0054] According to the discrete element model, write programs and perform calculations.

[0055] In this embodiment, the parameter values ​​are as follows: a 1 = 3.657, a 2 =2.671,a 3 =0.611, b=29.526, A 0 =4587(mm 2 ),

[0056] The comparison between the experimental numerical simulation...

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Abstract

the invention discloses a numerical simulation method for aging degradation of mechanical properties of carbonate rock under water action which includes such step as establishing a generalized model of mechanical property deterioration mechanism of carbonate rock under the action of water, setting up the generalized model of mechanical property deterioration mechanism of carbonate rock under the action of water, setting up the generalized model of mechanical property degradation mechanism of carbonate rock under the action of water. Step 22, establishing a discrete element model of aging deterioration of mechanical properties of carbonate rock under different immersion conditions according to the mechanism generalization model obtained in the step 1, and obtaining a quantitative correlation of mechanical properties with time of bonding between blocks of polygonal blocks under different immersion conditions; step 3, calibrating that mechanical parameters of the discrete element model; Carbonate rock mechanics tests under different immersion conditions and immersion time were carried out to calibrate the mechanical parameters of the discrete element model in step 2. Step 4, simulating the mechanical properties of carbonate rock under different immersion conditions by using the calibrated parameters of the discrete element model. The invention truly reflects the carbonate rock-water water interaction principle, a two-stage deterioration model and its discrete element simulation method are proposed.

Description

technical field [0001] The invention relates to the field of numerical simulation of the attenuation of mechanical properties of carbonate rocks under the action of water, in particular to a numerical simulation method for the aging degradation of mechanical properties of carbonate rocks under the action of water. Background technique [0002] Carbonate rocks are widely distributed in my country, and typical rock types include limestone, marble, dolomite, marl, etc. The main chemical composition of carbonate rock is calcite (mainly composed of calcium carbonate). The effect of water on carbonate rocks is not limited to softening, but is also closely related to the dissolution of calcium carbonate under the long-term action of water. The carbonate rock slopes in many large hydropower station reservoir areas in Southwest my country (for example, there are a large number of limestone slopes in the Three Gorges reservoir area, and the dam site of Xiaowan Hydropower Station is m...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 黄达顾东明杨芸芸钟助宋宜祥
Owner HEBEI UNIV OF TECH
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