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A method for stratified damage analysis of rock

A technology for rock and rock samples, applied in the field of layered damage analysis of rocks, which can solve the problems of inaccurate results and inability to obtain CT average values, and achieve the effects of simple operation, narrowing the damage range and saving operation time.

Active Publication Date: 2018-11-09
安徽省皖江机电设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for stratified damage analysis of rocks, which can solve the problem that the existing method cannot obtain the CT average value covering all points, and the results are not accurate, and accurately reflect the damage degree of rocks , the degree of damage within the infinitely small damage range can be obtained, and the operation is simple and does not require frequent operations

Method used

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  • A method for stratified damage analysis of rock
  • A method for stratified damage analysis of rock
  • A method for stratified damage analysis of rock

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Experimental program
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Effect test

Embodiment 1

[0034] Step 1: The rock sample is a cylindrical rock sample with a radius of 2.5 cm, select a certain cross-section on the rock sample, and divide the cross-section into regions: starting from the center point of the cross-section, divide 5 equal The sample rings with radius difference are marked as the first sample ring, the second sample ring, the third sample ring, the fourth sample ring, and the fifth sample ring. The radius difference is 0.5 cm, such as figure 1 shown;

[0035] Step 2: Calculate the mean value CT of the CT of each ring in the initial state Tave(N) : Perform an initial CT scan on the circle where each sample ring is located, and obtain the CT value of the circle where each sample ring is located 1初始 , CT 2初始 , CT 3初始 …CT N初始 , measuring the area of ​​the circle where each sample ring is located is S 1 , S 2 , S 3 …S N ,

[0036] CT mean CT of various rings in the initial state Tave(N)初始 =(CT N -CT N-1 ) / (S N -S N-1 )

[0037] N=5;

[0038] ...

Embodiment 2

[0053] The method also includes step 5:

[0054] Step 5: The fifth sample ring where the damage of the freeze-thaw cycle obtained in step 4 is mainly concentrated to the rock is divided into regions again, and starting from the central point of the cross section, the concentrated parts of the damage are divided into M (M=5 ) sample rings with equal radius difference, which are respectively the 5-1 sample ring, the 5-2 sample ring, the 5-3 sample ring, the 5-4 sample ring and the 5-5 sample ring, such as image 3 As shown, the radius difference is 0.1 cm; then according to the steps 2-4 of the above-mentioned embodiment 1, the data sorted out are as shown in Table 3:

[0055] table 3

[0056]

[0057] According to the data in Table 3, the average CT value of each sample ring-freeze-thaw cycle experiment number curve is made, such as Figure 4 shown, from Figure 4 It can be seen from the figure that the CT value of the 5th-5th sample ring has the most obvious change range...

Embodiment 3

[0060] The sample ring can also be designed as a rectangle, and n sample rings with equal radius differences are divided for the rock sample with a rectangular cross section, such as Figure 5 Shown, analyze according to the step of above-mentioned embodiment one and two.

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Abstract

The invention relates to a method of a layer-by-layer damage analysis on rock. The method comprises: step one, region division is carried out on a cross section; step two, a CT average value CT Tave (N) of all sample loops in an initial state is calculated; step three, n groups of freezing-thawing cycle tests with different numbers of times are carried out on a rock sample, and a CT average value CT Tave (N) nth group of all sample loops after all groups of freezing-thawing cycle tests is calculated respectively; and step four, data obtained at the step two and the step three are arranged, a damage analysis is carried out the rock, and a concentrated part with rock sample damages caused by the freezing-thawing cycle tests is determined. According to the method, problems that a CT average value covering all points can be not be obtained by the existing method and the result is not accurate can be solved; the damge degree of the rock can be reflected precisely; the damage degree in an infinitely small damage range can be obtained; the operation is simple and frequent operation is avoided.

Description

technical field [0001] The invention relates to a method for performing damage analysis on rock samples, in particular to a method for performing layered damage analysis on rocks. Background technique [0002] With the deepening of scientific research, most of the current methods for damage analysis of rock samples are CT scans of damaged rock samples, and the degree of damage inside the rock is analyzed through the brightness and darkness of the image after the CT scan and the size of the CT value. At present, there are three main methods for analyzing rocks through CT scanning: [0003] 1. Contrast CT images with naked eyes; [0004] A CT scan of a certain layer of rock, the brighter the image, the better the compactness of the rock. A few black dots in the middle indicate that there are local voids. Although this method can be used to visually observe the pore contrast inside the rock and roughly obtain the damage law of the rock, it cannot perform a quantitative analys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
CPCG06T7/0004G06T2207/10081G06T2207/30132
Inventor 刘杰雷岚颜媛媛梁佳丽兰钰支永艳
Owner 安徽省皖江机电设备制造有限公司
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