CN112710561A - Testing method and device based on rock uniaxial compression - Google Patents

Testing method and device based on rock uniaxial compression Download PDF

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Publication number
CN112710561A
CN112710561A CN202011534395.5A CN202011534395A CN112710561A CN 112710561 A CN112710561 A CN 112710561A CN 202011534395 A CN202011534395 A CN 202011534395A CN 112710561 A CN112710561 A CN 112710561A
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rock
rock sample
temperature
strain
test
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邵珠山
黄新彩
薛涛
朱意明
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/18—Performing tests at high or low temperatures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0075—Strain-stress relations or elastic constants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/0222—Temperature
    • G01N2203/0226—High temperature; Heating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/025—Geometry of the test
    • G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0694—Temperature

Abstract

The invention discloses a test method and a device based on rock uniaxial compression, which comprises the steps of controlling the constant-speed heating rate in a sealed test box and keeping the temperature of each part in a rock sample consistent with the temperature of the surface of the rock; uniformly applying load on the upper cushion block at a displacement loading rate for uniform loading until the rock sample is completely destroyed; calculating a stress-strain value of the rock sample according to strain data acquired by the sensor, acquiring longitudinal and transverse strains of the rock sample under corresponding loads, and drawing a stress-strain relation curve of the rock sample; and obtaining the thermal strain increment and the thermal stress increment of the rock sample under the temperature condition. The invention can realize the uniaxial temperature control test of rock compressive strength change under temperature control, thereby obtaining the test result of reducing the degree and possibility of rock burst.

Description

Testing method and device based on rock uniaxial compression
Technical Field
The invention relates to a rock sample temperature control test device, in particular to a test method and a test device based on rock uniaxial compression.
Background
Along with the continuous development of a deeply buried tunnel, the three-high one-disturbance severe engineering environment and the demonstration of complex physical and mechanical properties of the tunnel lead rock burst and surrounding rock deformation of different degrees to be more and more generated, the highest temperature of the surrounding rock of part of the high-ground-temperature tunnel can reach 130 ℃ in the monitoring process of surrounding rock tunneling, the generated rock burst grade is higher than that of the rock burst in a common tunnel, and the severe test is brought to the engineering construction. A large amount of data obtained by combining field actual measurement and indoor tests can also indicate that the temperature has a great influence on the mechanical properties of the rock, so that the research on the strength change of the rock under the temperature control has great significance for reducing the degree and possibility of rock burst. But because current single-axis test instrument can't realize the temperature control to the rock sample, can only show that earlier independent heating, put into the single-axis instrument again and carry out the loading test, often can cause the error because of the temperature runs off to the test result.
Therefore, the uniaxial compression test method and the uniaxial compression test device for the rock aim at researching temperature control and loading integration of the rock sample, and the uniaxial temperature control test for realizing the change of the compressive strength of the rock under the temperature control becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention discloses a rock uniaxial axis test method and a rock uniaxial axis test device, which can solve the technical problems of rock temperature control and loading in the existing uniaxial test, can realize the uniaxial temperature control test of rock compressive strength change under temperature control, and further obtain the test result of reducing the degree and possibility of rock burst.
The invention is realized by the following technical scheme.
The invention provides a test method based on rock uniaxial compression, which comprises the following steps:
the test device comprises a test sealing test box, a test pressure sensor, a temperature control system and a pressure sensor, wherein the test sealing test box is arranged on a placing table, a heat insulation layer and a heating box are arranged outside the test sealing test box, a tested rock sample is arranged in a cavity of the test sealing test box, and a sensing piece connected to a stress-strain data acquisition instrument and the temperature control system is arranged on the rock sample; an upper cushion block is arranged at the top of the rock sample;
the test method comprises the following steps:
placing a rock sample in a sealing test box, controlling the constant-speed heating rate in the sealing test box, and keeping the temperature of each part in the rock sample consistent with the temperature of the surface of the rock;
uniformly applying a load on the upper cushion block at a displacement loading rate of 0.02-0.05 mm/s for uniform loading until the rock sample is completely destroyed; obtaining longitudinal and transverse strains of the rock sample under corresponding loads, and drawing a stress-strain relation curve of the rock sample; and obtaining the thermal strain increment and the thermal stress increment of the rock sample under the temperature condition.
With respect to the above technical solutions, the present invention has a further preferable solution:
preferably, the temperature range in the sealed test box is 0-200 ℃; the test is carried out by uniformly heating at the heating rate of 5 ℃/min per minute; and keeping the required temperature for 30min, namely keeping the temperature of each part in the rock sample consistent with the surface temperature of the rock.
Preferably, the step of plotting the stress-strain relationship of the rock sample comprises:
1) using the load P corresponding to the different measured strain valuesiCalculating the thermal stress;
2) using longitudinal strain epsilon of rock sample under corresponding load1Transverse strain epsilon2Calculating the volume strain value epsilonv；
3) And drawing a stress-strain relation curve of the rock sample by taking the thermal stress as an ordinate and the strain as an abscissa.
The invention provides a test device for uniaxial compression of rock, which is adopted by the method and comprises a base, an upper cushion block, a lower cushion block and a rock sample, wherein the base, the upper cushion block, the lower cushion block and the rock sample are arranged in a cavity of a sealed test box, the rock sample is placed on the lower cushion block, the upper cushion block is placed on the upper part of the rock sample, and load is applied to the upper cushion block.
Preferably, the sensing piece on the rock sample comprises a stress-strain sensing piece and a temperature sensing piece, the stress-strain sensing piece is connected to the stress-strain data acquisition instrument, and the temperature sensing piece is connected to the temperature control system.
Preferably, a heating box is arranged on the peripheral side wall of the outer periphery of the sealing test box, and a heat insulation layer is arranged between the outer periphery of the sealing test box and the heating box; the heating box contains a plurality of heating rods inside.
Preferably, a heating rod in the heating box is connected with a power supply for heating or connected with a cold source for cooling.
Preferably, the top of the sealing test box is provided with a sealing cover, and the upper part of the sealing cover is provided with a heat-insulating layer; the sealing cover is provided with a preformed hole which can be sleeved into the upper cushion block, and the sealing cover is also provided with an exhaust hole and a wiring preformed hole.
Preferably, the bottom of the sealed test box is provided with a preformed hole which can be sleeved into the lower part of the base.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1) the method is based on the longitudinal and transverse strain of the rock sample under the temperature change and different loads in the uniaxial compression process of the rock, obtains the thermal strain increment and the thermal stress increment of the rock sample under the temperature condition, obtains the test result for reducing the degree and possibility of rock burst by researching the temperature control and loading integrated test of the rock sample, and comprehensively evaluates the stress strain change condition of the rock through the temperature of the rock sample.
2) The sealed test box and the sealed cover form a sealed space, and the rock sample is subjected to temperature heating and heat preservation in the sealed space. By adopting the method for heating the rock sample by using the temperature control device in the closed space, the problem of heat loss caused by taking out the rock sample by heating the traditional muffle furnace and then loading the rock sample can be avoided.
3) The arrangement of the vent holes can play a role in reducing air pressure and keeping the stability of pressure intensity, thereby achieving the stability of the gas state in the closed space; the phenomenon that the accuracy of the stress-strain measurement value is influenced due to damage of an instrument is avoided.
4) Stress-strain sensing pieces and temperature sensing pieces are arranged on four peripheries of a rock sample, an additional stress is generated on the rock sample in a closed space under the temperature action according to the calculation of a heat conduction differential equation of internal energy conversion, the temperature of the rock is controlled through the connection of a temperature control system and the temperature sensing pieces, and the comprehensive analysis on the mechanical property of the rock under the temperature change is facilitated by combining the data of a stress-strain data acquisition instrument by utilizing the mechanical principle.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a schematic diagram of the structure of the inventive device;
FIGS. 2(a) and 2(b) are schematic structural diagrams of a sealing cover and a sealing test box of the device of the invention respectively;
fig. 3 is a stress-strain curve of a uniaxial compression experiment of rock.
In the figure: 1. place the platform, 2, the base, 20, the lower part installation preformed hole, 3, the sealing test case, 4, sealed lid, 5, go up the cushion, 50, the upper portion preformed hole, 6, the lower bolster, 60, the lower part preformed hole, 7, the rock sample, 8, sealing bolt, 9, the temperature-sensing piece, 10, temperature control system, 11, the stress-strain response piece, 12, the stress-strain data acquisition instrument, 13, the heat preservation, 14, the heating cabinet (including the heating rod), 15, the exhaust hole, 16, the wiring preformed hole.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
As shown in figure 1, the test device based on rock uniaxial compression comprises a sealing test box 3 placed on a placing table 1, wherein a base 2, an upper cushion block 5, a lower cushion block 6 and a rock sample 7 are arranged in a cavity of the sealing test box 3, the rock sample 7 is placed on the lower cushion block 6, the upper cushion block 5 is placed on the upper portion of the rock sample 7, and a load is applied to the upper cushion block 5 to deform the rock sample 7. And a stress-strain sensing piece 11 and a temperature sensing piece 9 are arranged on the rock sample 7, the stress-strain sensing piece 11 is connected to a stress-strain data acquisition instrument 12, and the temperature sensing piece 9 is connected to a temperature control system 10.
The temperature sensing piece 9 is stuck on the peripheral side surface of the rock sample 7; the temperature control system 10 controls the temperature of the rock sample 7 by connection to the temperature sensing strip 9 and the heating chamber 14. To lower the temperature inside the sealed test chamber 3, the heating rod inside the heating chamber 14 may be filled with a refrigerant fluid.
The rock sample 7 is placed inside the sealing test box 3, and the sealing cover 4 is covered on the upper part of the sealing test box 3 through the sealing bolt 8. A heating box 14 is arranged outside the sealing test box 3, and the heating box 14 is arranged on the peripheral side wall of the sealing test box 3; an insulating layer 13 is arranged between the outside of the sealing test box 3 and the heating box 14; the heating box 14 contains a plurality of heating rods therein. The upper part of the sealing cover 4 is provided with a heat-insulating layer 13 for wrapping; the sealing test box 3 is tightly combined with the sealing cover 4 through a sealing bolt 8.
As shown in fig. 2(b), a lower preformed hole 60 capable of being sleeved into the base 2 is formed in the lower portion of the sealing test chamber 3, and the cross-sectional area of the lower preformed hole 60 is the same as that of the base 2.
As shown in fig. 2(a), an upper preformed hole 50 capable of being sleeved into the upper cushion block 5 is distributed on the sealing cover 4, the cross-sectional area of the upper preformed hole 50 is the same as that of the upper cushion block 5, and the upper preformed hole 50 is in sliding connection with the upper cushion block 5. The sealing cover 4 is provided with a wiring preformed hole 16, and the upper part of the wiring preformed hole 16 is exposed out of the heat-insulating layer 13; the sealing test box 3 and the sealing cover 4 form a sealed space, and the rock sample 7 is subjected to temperature heating and heat preservation in the sealed space. The sealing cover 4 is also provided with an air vent 15. According to the constant volume of the container in the closed space, the pressure is gradually increased under the condition of continuous temperature rise, the instrument can be damaged if the container is completely sealed, and the stress strain measurement value is influenced, so that the vent hole 15 can play a role in reducing the air pressure.
Stress-strain induction sheets 11 are arranged on four side faces of the rock sample 7, and the relation between the rock temperature and the stress strain is judged by utilizing the mechanical principle, so that the comprehensive analysis of the mechanical property of the rock is facilitated. Temperature-sensing pieces 9 are arranged on four side faces of the rock sample, and the temperature of the rock sample 7 is controlled through connection of a temperature control system 10 and the temperature-sensing pieces 9.
The stress-strain data acquisition instrument 12 is connected with a lead of the stress-strain sensing piece 11 through a wiring preformed hole 16; the temperature control system 10 is connected with the lead of the temperature sensing piece 9 through a wiring preformed hole. Set up wiring preformed hole 16 and carry out the wire connection to weld here, can make the leakproofness effect of sealed lid 4 better, use high temperature resistant wire can be difficult to ageing.
The used leads all belong to high temperature resistant leads. The lead wire will heat up with the temperature rise during the heating process of the rock sample 7, and the lead wire using high temperature resistance will not be easy to age.
The embodiment of the invention performs uniaxial compression test on a rock sample by applying load, and comprises the following specific steps:
1) preparing a rock sample 7, and manufacturing a cylindrical rock block by using a cutting machine, wherein the size can be selected from the diameter D of 50mm and the height H of 100 mm;
2) evenly distributing temperature sensing sheets 9 and stress strain sensing sheets 11 on the side surface of the rock sample 7;
3) smoothly placing a sealing test box 3 on a base 2, arranging a lower cushion block 6 on the base 2, then placing a rock sample 7 prepared in the step 2) on the upper part of the lower cushion block 6, and pressing an upper cushion block 5 on the upper part of the rock sample 7;
2) a connecting lead penetrates through a reserved wiring hole 16 of the sealing cover 4 and is welded at the reserved wiring hole, then the sealing cover 4 is sleeved on the upper cushion block 5 and covers the upper part of the sealing test box 3, and the sealing test box 3 and the sealing cover 4 are tightly closed through a sealing bolt 8;
4) connecting wires required by the stress-strain data acquisition instrument 12 and the temperature control system 10;
in the experiment, the temperature of the surrounding rock in the tunnel is generally determined to be 30 ℃, so that 30 ℃ is taken as a control group. Then respectively taking 60 ℃, 90 ℃ and 120 ℃ as experimental groups, respectively heating the rock to 30 ℃, 60 ℃, 90 ℃ and 120 ℃ by using a temperature control plate, uniformly heating at a heating rate of 5 ℃/min per minute, and not continuously heating when the temperature display displays that the heating temperature is the required temperature. And after the required temperature is kept for 30min, the temperature of each part in the rock sample is considered to be consistent with the surface temperature of the rock. And then, uniformly applying a load F to the upper cushion block 5 at a displacement loading rate of 0.02-0.05 mm/s, reading at one tenth of the estimated breaking load, and monitoring the longitudinal and transverse strain of the rock sample 7 under the corresponding load in real time by using the stress-strain data acquisition instrument 12 until the rock sample is completely broken.
The reading of each test process in the test process is not less than 7 points, and the longitudinal strain and the transverse strain of the same sample are read out simultaneously as much as possible. And recording the breaking load value, calculating stress values corresponding to all groups of strain values, drawing a relation curve related to stress and strain, and obtaining the thermal strain increment of the rock sample under the temperature condition.
The method for drawing the stress-strain relation curve of the rock sample comprises the following steps:
a) using the load P corresponding to the different measured strain valuesiCalculating the thermal stress:
σ＝Pi/S
in the formula: σ is the thermal stress; piLoads corresponding to the measured different strain values; s is the load area of the test piece;
b) using longitudinal strain epsilon of rock sample under corresponding load1Transverse strain epsilon2Calculating the volume strain value epsilonv：
εV＝ε1+2ε2
c) And drawing a stress-strain relation curve of the rock sample by taking the thermal stress as an ordinate and the strain as an abscissa, wherein the stress-strain relation curve is shown in figure 3. Wherein: in the OA section, the stress is slowly increased, the curve is concave upwards, cracks in the rock test piece are gradually compressed and closed to generate nonlinear deformation, and the cracks are completely recovered after being unloaded and belong to elastic deformation. And in the AB section and the elastic-plastic deformation stage, the curve is gradually changed from linear to nonlinear. Micro-cracks parallel to the direction of the maximum principal stress started to appear inside the test piece. As the stress increases, the number increases, indicating that failure of the rock has begun. And in the BC section, the forming speed of cracks in the rock is increased, the density is increased, and the stress of the C point reaches the peak value and reaches the maximum bearing capacity of the rock. And in the CD section, the stress continues to increase, the rock bearing capacity is reduced, and the strain softening characteristic is shown. The micro-cracks of the rock are gradually communicated in the stage.
Calculating the thermal strain increment and the thermal stress increment of the rock sample under the temperature condition comprises the following steps:
according to the finite difference thermal coupling principle:
Figure BDA0002852745870000071
when k is a constant number, it is,
Figure BDA0002852745870000072
the temperature corresponding to a certain node xi is Ti,
Figure BDA0002852745870000073
the temperature induced increase in thermal strain is: Δ ε ═ α Δ T δ
The thermal stress increase caused by temperature is: delta sigma is-3K delta epsilon
In the formula: t is the temperature; rho is density; q is the heat released by the rock sample in unit time; k is a heat transfer coefficient; c is specific heat; α is a thermal expansion coefficient; temperature difference Δ T ═ Ti-Ti+1(ii) a K is the bulk modulus; δ is the thermal strain operator, i.e., δ is 1.
By utilizing the test device based on rock uniaxial compression provided by the invention, the stress-strain change condition of the rock can be comprehensively evaluated through the temperature of the rock sample in the uniaxial test of the rock sample.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.

Claims (10)

1. A test method based on uniaxial compression of rock is characterized by comprising the following steps:
the test device comprises a test sealing test box, a test pressure sensor, a temperature control system and a pressure sensor, wherein the test sealing test box is arranged on a placing table, a heat insulation layer and a heating box are arranged outside the test sealing test box, a tested rock sample is arranged in a cavity of the test sealing test box, and a sensing piece connected to a stress-strain data acquisition instrument and the temperature control system is arranged on the rock sample; an upper cushion block is arranged at the top of the rock sample;
the test method comprises the following steps:
placing a rock sample in a sealing test box, controlling the constant-speed heating rate in the sealing test box, and keeping the temperature of each part in the rock sample consistent with the temperature of the surface of the rock;
uniformly applying a load on the upper cushion block at a displacement loading rate of 0.02-0.05 mm/s for uniform loading until the rock sample is completely destroyed; obtaining longitudinal and transverse strains of the rock sample under corresponding loads, and drawing a stress-strain relation curve of the rock sample; and obtaining the thermal strain increment and the thermal stress increment of the rock sample under the temperature condition.
2. The uniaxial rock compression-based test method according to claim 1, wherein the temperature in the sealed test chamber is in the range of 0 to 200 ℃; the test is carried out by uniformly heating at the heating rate of 5 ℃/min per minute; and keeping the required temperature for 30min, namely keeping the temperature of each part in the rock sample consistent with the surface temperature of the rock.
3. The uniaxial rock compression-based test method of claim 1, wherein plotting the stress-strain relationship of the rock sample comprises:
1) using the load P corresponding to the different measured strain valuesiCalculating the thermal stress:
σ＝Pi/S
in the formula: σ is the thermal stress; piLoads corresponding to the measured different strain values; s is the load area of the test piece;
2) using longitudinal strain epsilon of rock sample under corresponding load1Transverse strain epsilon2Calculating the volume strain value epsilonv：
εV＝ε1+2ε2
3) And drawing a stress-strain relation curve of the rock sample by taking the thermal stress as an ordinate and the strain as an abscissa.
4. The uniaxial rock compression-based test method of claim 1, wherein calculating the thermal strain increment and the thermal stress increment of the rock sample under the temperature condition comprises:
according to the finite difference thermal coupling principle:
Figure FDA0002852745860000021
when k is a constant number, it is,
Figure FDA0002852745860000022
the temperature corresponding to a certain node xi is Ti,
Figure FDA0002852745860000023
the temperature induced increase in thermal strain is: Δ ε ═ α Δ T δ
The thermal stress increase caused by temperature is: delta sigma is-3K delta epsilon
In the formula: t is the temperature; rho is density; q is the heat released by the rock sample in unit time; k is a heat transfer coefficient; c is specific heat; α is a thermal expansion coefficient; temperature difference Δ T ═ Ti-Ti+1(ii) a K is the bulk modulus; δ is the thermal strain operator.
5. A test device based on rock uniaxial compression adopted by the method according to any one of claims 1-4, characterized in that a base, an upper cushion block, a lower cushion block and a rock sample are arranged in a sealed test box cavity, the rock sample is placed on the lower cushion block, the upper cushion block is placed on the upper part of the rock sample, and load is applied on the upper cushion block.
6. The uniaxial rock compression-based test device of claim 5, wherein the sensing piece on the rock sample comprises a stress-strain sensing piece and a temperature sensing piece, the stress-strain sensing piece is connected to the stress-strain data acquisition instrument, and the temperature sensing piece is connected to the temperature control system.
7. The uniaxial rock compression-based test device according to claim 5, wherein a heating box is arranged on the peripheral side wall of the sealing test box, and an insulating layer is arranged between the outside of the sealing test box and the heating box; the heating box contains a plurality of heating rods inside.
8. The rock uniaxial compression-based test device is characterized in that a heating rod in the heating box is connected with a power supply for heating or a cold source for cooling.
9. The uniaxial rock compression-based test device of claim 5, wherein the top of the sealing test box is provided with a sealing cover, and the upper part of the sealing cover is provided with an insulating layer; the sealing cover is provided with a preformed hole which can be sleeved into the upper cushion block, and the sealing cover is also provided with an exhaust hole and a wiring preformed hole.
10. The uniaxial rock compression-based test device of claim 5, wherein the bottom of the sealed test box is provided with a lower reserved hole capable of being sleeved into the base.
CN202011534395.5A 2020-12-22 2020-12-22 Testing method and device based on rock uniaxial compression Pending CN112710561A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114184489A (en) * 2021-12-17 2022-03-15 北京科技大学 System and method for realizing real-time uniaxial compression at high temperature
CN114184477A (en) * 2022-02-16 2022-03-15 中国矿业大学(北京) Real-time wind-temperature rock uniaxial compression experimental device, system and method
CN114236361A (en) * 2021-12-23 2022-03-25 中国矿业大学 Device and method for testing micro-current under rock load at high temperature

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114184489A (en) * 2021-12-17 2022-03-15 北京科技大学 System and method for realizing real-time uniaxial compression at high temperature
CN114236361A (en) * 2021-12-23 2022-03-25 中国矿业大学 Device and method for testing micro-current under rock load at high temperature
CN114236361B (en) * 2021-12-23 2024-05-03 中国矿业大学 Rock loaded micro-current testing device and method at high temperature
CN114184477A (en) * 2022-02-16 2022-03-15 中国矿业大学(北京) Real-time wind-temperature rock uniaxial compression experimental device, system and method

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