Device and method for in-situ measurement of rock abrasion degree and needle penetration degree

An in-situ measurement and penetration technology, applied in the direction of measuring devices, testing wear resistance, strength characteristics, etc., can solve problems such as experimental errors, inconvenience, unfavorable wear mechanism analysis, etc.

Pending Publication Date: 2020-03-24
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the Secha wear test is a widely used rock wear resistance test method, there are still many deficiencies in the commonly used test instruments in the world: as far as the existing test instruments are concerned, most of them are taken back to the laboratory for testing. In the experiment, a series of internal environments such as temperature, humidity, water content, and ground stress of the original rock will change, which will bring great errors to the experiment, and it is not real-time. After the test, the measurement of the width of the steel needle tip depends on the display Micro-measurement has limited accuracy and is inconvenient; in addition, because it cannot record the characteristics of rock dents, it is not conducive to the analysis of wear-resistant mechanism, and it cannot record the force value and displacement value when the steel needle moves horizontally, which is not conducive to the analysis of wear-resistant mechanism, and it cannot dynamically record experiments. Process data, not conducive to experimental process analysis
Its disadvantage is that it is necessary to bring the sampled samples back to the laboratory for experiments, and a series of internal environments such as the temperature, humidity, water content, and in-situ stress of the original rock will change, which will bring great errors to the experiments. It is authentic; in addition, it is impossible to measure the change law of the abrasiveness and penetration of the entire rock

Method used

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  • Device and method for in-situ measurement of rock abrasion degree and needle penetration degree
  • Device and method for in-situ measurement of rock abrasion degree and needle penetration degree
  • Device and method for in-situ measurement of rock abrasion degree and needle penetration degree

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: a kind of method of in-situ measurement rock abrasiveness, it comprises the following steps:

[0043] Step 1): opening channels on the original rock;

[0044] Step 2): After installing the grinding disc 4 on the output shaft of the motor 3, put the whole device into the hole;

[0045] Step 3): Make the moving rod 1 extend into the tunnel to a certain depth, and then turn on the telescopic device 2 and the motor 3, so that the grinding disc 4 presses the inner wall of the tunnel with a constant pressure;

[0046] Step 4): The grinding disc 4 continuously rotates at a constant speed while pressing the inner wall of the tunnel, and the abrasive depth of the rock under a fixed pressure per unit time is the abrasiveness of the rock.

[0047] Preferably, in the step 1), the holes opened on the original rock have a cubic hole structure; in the step 3), the number of telescopic devices 2 is 4, and the surface of the grinding disc 4 installed on the motor 3 at the e...

Embodiment 2

[0048] Embodiment 2: In order to measure the penetration of rock at the same depth, this embodiment discloses a method for measuring the penetration of rock in situ, which includes the following steps:

[0049] Step 1): opening a cylindrical channel on the original rock;

[0050] Step 2): After installing the needle valve 5 on the output shaft of the motor 3, put the whole device into the tunnel;

[0051] Step 3): Make the moving rod 1 extend into the tunnel to a certain depth, and then open the telescopic device 2, so that the needle valve 5 presses the inner wall of the tunnel with a constant pressure, and keeps the moving rod 1 rotating at a constant speed;

[0052] Step 4): The needle valve 5 continuously passes along the circumference of the inner wall of the tunnel while pressing against the inner wall of the tunnel, and the penetration depth of the needle valve 5 under a fixed pressure per unit time is the penetration of the rock at the same depth.

Embodiment 3

[0053] Embodiment 3: In order to measure the penetration of rocks at different depths, this embodiment discloses another method for measuring the penetration of rocks in situ, which includes the following steps:

[0054] Step 1): opening channels on the original rock;

[0055] Step 2): After installing the needle valve 5 on the output shaft of the motor 3, put the whole device into the tunnel;

[0056] Step 3): Open the telescopic device 2 to make the needle valve 5 press the inner wall of the tunnel with a constant pressure, and make the moving rod 1 move to the bottom of the tunnel at a constant speed;

[0057] Step 4): The needle valve 5 continuously draws a straight line along the inner wall of the channel to the depth of the channel while pressing against the inner wall of the channel, and the depth of needle penetration of the needle valve 5 under the constant pressure applied to the inner wall of the channel at different depths per unit time is the depth of the differen...

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PUM

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Abstract

The invention discloses a device and a method for in-situ measurement of rock abrasion degree and needle penetration degree. The device comprises a moving rod arranged in a protolith hole channel, a plurality of telescopic devices are arranged on the surface of the moving rod, the tail ends of the telescopic devices are fixedly connected with a motor, and a grinding disc or a needle valve is installed on an output shaft of the motor. According to the invention, in-situ measurement can be carried out, and the abrasiveness and penetration of the rock at different depths can be accurately obtained, so that the change rule of the abrasiveness and penetration of the whole rock can be obtained.

Description

technical field [0001] The invention relates to the technical field of rock measurement, in particular to a device and method for in-situ measurement of rock abrasion and penetration. Background technique [0002] At present, to test the penetration of rocks, the CERCHAR wear test is mainly used in the world. The method is: a steel needle with a cone angle of 90 degrees is covered with a 7Kg weight, and the needle tip acts on the smooth surface of the rock. , move 10mm along the horizontal direction at a speed of 10mm / min, remove the steel needle, and test the width of the needle tip. The unit is 0.1mm, which is the wear resistance index of Secha. Secha wear resistance index is a very important design index in tunnel excavation and mining, but there is currently no test instrument for Secha wear resistance index in China. [0003] Although the Secha wear test is a widely used rock wear resistance test method, there are still many deficiencies in the commonly used test instr...

Claims

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Application Information

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IPC IPC(8): G01N3/56
CPCG01N3/56G01N2203/0012G01N2203/0682
Inventor 刘杰孙涛田港李洪亚高素芳黎照谢晓康唐洪宇李运舟杜卓兴石谦杨浩宇周预非贺梦玲
Owner CHINA THREE GORGES UNIV
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