LU102275B1 - Portable device and simple method for multi-parameter comprehensive testing of core - Google Patents
Portable device and simple method for multi-parameter comprehensive testing of core Download PDFInfo
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- LU102275B1 LU102275B1 LU102275A LU102275A LU102275B1 LU 102275 B1 LU102275 B1 LU 102275B1 LU 102275 A LU102275 A LU 102275A LU 102275 A LU102275 A LU 102275A LU 102275 B1 LU102275 B1 LU 102275B1
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- 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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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- G—PHYSICS
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- 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
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- G01N2203/0019—Compressive
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- 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
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The disclosure provides a portable device and simple method for multi-parameter comprehensive testing of a core. The device includes a core wrapping holder and a parameter testing host, where the core wrapping holder includes a wrapping belt and parameter test elements arranged on the wrapping belt. The wrapping belt for wrapping the core includes an inner layer and an outer layer, a sealed pressurized air bag is arranged between the inner layer and the outer layer of the wrapping belt, the pressurized air bag is connected to an inflation device through a rubber hose, and the test elements include a resistivity test element, a wave velocity test element and a strain test element which are in signal link with the parameter testing host. The disclosure can implement multi-state geophysical parameter testing of cores with different diameters. A resistivity test and a wave velocity test can be performed when the core is in a free state or subjected to axial pressure; and the strain test is performed when rocks are deformed and destroyed under axial pressure on the core.
Description
TECHNICAL FIELD The disclosure relates to the technical field of physical parameter testing of rocks, and in particular, to a portable device and simple method for multi-parameter comprehensive testing of a core.
BACKGROUND Coal is still one of the main energy sources in China in the future. Further in-depth understanding of geological conditions of coal mining is quite important for future development of mine production. It is necessary to strengthen the testing and understanding of physical and mechanical and geophysical parameters of rocks and accurately grasp core test parameters of coal measure strata. This is the basis for constructing transparent geological conditions for mining.
Resistivity, strain and wave velocity are important geological and geophysical parameters, which are essential in exploration data interpretation and model forward parameter selection, etc. In addition, multi-parameter comprehensive testing and automation of experimental processes are the key to core analysis, and also the development trend of core testing and analysis.
SUMMARY The disclosure provides a portable device and simple method for multi-parameter comprehensive testing of a core to solve the foregoing problems in the prior art, such that a core analysis device is portable. multi-state full-diameter cores can be analyzed, the test method is accurate and efficient, and test parameters are fine and comprehensive.
To achieve the above purpose, the disclosure provides the following technical solutions: À portable device for multi-parameter comprehensive testing of a core includes a core wrapping holder and a parameter testing host, where the core wrapping holder includes a wrapping belt and parameter test elements arranged on the wrapping belt, the wrapping belt for wrapping the core includes an inner layer and an outer layer, a scaled pressurized air bag is arranged between the inner layer and the outer layer of the wrapping belt, the pressurized air bag is connected to an inflation device through a rubber hose, and the test elements include a resistivity test element, a wave velocity test clement and a strain test element which are in signal link with the parameter 1 testing host.
Preferably, the wrapping belt is made of a material which is not easy to stretch, and the wrapping belt is a rectangle with a length greater than or equal to 100 mm and a length greater than or equal to 450 mm; and both ends of the wrapping belt are bonded through a hook and loop fastener.
Preferably, the resistivity test element includes electrodes A, M, N and B, pin probes are arranged on outer surfaces of the four electrodes adhering to the core, and the tops of the pin probes are provided with sponges capable of absorbing water; the four electrodes are vertically arranged on a left side of an inner surface of the wrapping belt and are 10 mm away from an outer side, and the four electrodes are fixed.
Preferably, the wave velocity test element includes an excitation probe and a receiving probe, the two probes are ultrasonic probes, and the excitation probe is arranged between the electrode M and the electrode N; a sliding rail is transversely arranged on a middle portion of an inner wall of the wrapping belt, and the receiving probe is slidably arranged on the sliding rail.
Preferably, the sliding rail is made of a transversely bendable material and has a length greater than or equal to 175 mm, and a distance between a left end of the sliding rail and the excitation probe is not greater than 39 mm; and a side of the sliding rail is provided with a ruler for controlling a distance between the excitation probe and the receiving probe.
Preferably, the strain test element is a distributed optical fiber, one optical fiber distributed in a vertical range on the inner surface of the wrapping belt is arranged around the core, an upper end C of the optical fiber is located above the electrode A, a vertical distance between a lower end D and the upper end C is 100 mm, and a transverse distance therebetween is 68 mm.
Preferably. a rectangular steel ring is arranged on the edge of one side of the resistivity test clement close 10 the resistivity test element, and the other side of the wrapping belt is fixed by a hook and loop fastener after passing through the steel ring.
Preferably, the parameter testing host includes a resistivity test module, a wave velocity test module and a strain test module, each of the test modules is connected to the parameter test element through a multi-parameter integrated cable, and the cable passes through the inside of the wrapping belt.
2
The disclosure further provides a simple method for multi-parameter comprehensive testing of a core applied to the above portable device for multi-parameter comprehensive testing of a core, including the following steps:
1) core wrapping and holding: according to a core size, adjusting a distance between an excitation probe and a receiving probe, adding water to sponges on four electrodes in a resistivity test element, wrapping and holding the core with a wrapping belt and sticking the core tightly by a hook and loop fastener; using an inflation device to pressurize a pressurized air bag, so that the resistivity test element, a wave velocity test element and a strain test element on an inner wall of the wrapping belt are coupled with the core;
2) resistivity testing: connecting a testing host to the four electrodes of the resistivity test element on a core wrapping holder through a cable, sending a current loading instruction by a resistivity test module in the testing host, automatically loading a continuous current to a tested core through electrodes A and B, starting to acquire data by the resistivity test module in the testing host, and recording a supply current / between the electrodes A and B and a potential difference AU between electrodes M and N. where a resistivity value of each core sample is as follows:
_ 2x AU.
Po P XF aus Tan Tau Tay
3) wave velocity testing: connecting the testing host to an ultrasonic probe on the core wrapping holder through a cable, and controlling, by a wave velocity test module in the testing host, a pulse generator to emit a high-voltage pulse, where the high-voltage pulse excites an ultrasonic signal in the excitation probe, and the ultrasonic signal is received by the receiving probe after passing through the tested core; acquiring data by the testing host, performing analog-to- digital conversion of the data signal by the testing host and then recording time information, and calculating a wave velocity of the tested core according to ultrasonic travel time / given in the time information
I 2, where D is a diameter of the core;
4) strain parameter background value testing: subjecting the core to strain background value testing in a free state, where after the core is wrapped by the wrapping belt, a distributed optical
3 fiber is tightly coupled with the core, a series of strain sampling points are obtained according to the core size testing host, one sampling point corresponds to one spatial coordinate on the core, and the distributed optical fiber is connected to the testing host; controlling and transmitting an optical signal to the optical fiber by a strain test module in the testing host; after the optical signal is transmitted. measuring Rayleigh scattering signal information in the optical fiber by the strain test module, thereby parsing background data on the strain sampling points; and 5) strain parameter testing under a loaded state: applying axial pressure to the core by using an axial pressure loading device, and continuously acquiring strain data during this dynamic process to capture the strain value generated during the rock fracture until the core sample is completely destroyed.
The disclosure achieves the following technical effects compared with the prior art.
The disclosure can implement multi-state geophysical parameter testing of cores with different diameters. A resistivity test and a wave velocity test can be performed when the core is in a free state or subjected to axial pressure; and the strain test is performed when rocks are deformed and destroyed under axial pressure on the core. The testing device according to the disclosure is light, stable, reliable, firm and durable, suitable for laboratories and fields and portable. The comprehensive testing of core resistivity, wave velocity and strain parameters is implemented, and the testing method is scientific and effective. Geophysical parameters of the full-diameter core in various states are tested. Fine testing of core strain is implemented, and test results have high visualization, strong anti-interference ability and stable output. The strain changes of the core before and after damage can be obtained, and the results can be used to analyze the deformation and failure mechanism of rock under load. The working efficiency of indoor core testing is improved, and the geological and geophysical parameters of the core in different states are obtained.
BRIEF DESCRIPTION OF THE DRAWINGS To describe the technical solutions in the examples of the disclosure or in the prior art more clearly, the following briefly introduces the accompanying drawings required for describing the examples. Apparently, the accompanying drawings in the following description show merely some examples of the disclosure, and a person of ordinary skill in the art may still derive other accompanying drawings from these accompanying drawings without creative efforts.
4
FIG. 1 is a schematic diagram of an overall structure of a portable device for multi-parameter comprehensive testing of a core; FIG. 2 is a schematic diagram of the arrangement of elements for testing resistivity, wave velocity, strain, etc.; and FIG. 3 is a schematic diagram of a setting position of a hook and loop fastener of a wrapping belt.
In the figures: 1. rubber hose; 2. male hook and loop fastener; 3. female hook and loop fastener; 4. integrated cable; 5. steel ring; 6. outer surface of a wrapping belt; 7. inner surface of the wrapping belt; 8. resistivity test element; 9. excitation probe; 10. receiving probe; 11. sliding rail; 12. ruler; 13. strain test clement.
DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the examples of the disclosure with reference to accompanying drawings in the examples of the disclosure. Apparently, the described examples are merely some rather than all of the examples of the disclosure. All other examples obtained by a person of ordinary skill in the art based on the examples of the disclosure without creative efforts shall fall within the protection scope of the disclosure.
The disclosure provides a portable device and simple method for multi-parameter comprehensive testing of a core to solve the foregoing problems in the prior art, such that a core analysis device is portable, multi-state full-diameter cores can be analyzed. the test method is accurate and efficient, and test parameters are fine and comprehensive.
In order to make the foregoing objectives, features, and advantages of the disclosure more understandable, the disclosure will be further described in detail below with reference to the accompanying drawings and specific implementations.
As shown in FIGs. 1-3, the disclosure provides a portable device for multi-parameter comprehensive testing of a core. The device includes a core wrapping holder and a paramcter testing host.
1. Core wrapping holder. The core wrapping holder is mainly composed of a wrapping belt. and a resistivity test element, a wave velocity test element and a strain test element which are arranged on the wrapping belt (FIG. 1).
(1) Wrapping belt. The wrapping belt is made of a material which is not easy to stretch. The wrapping belt includes an inner layer and an outer layer and a sealed pressurized air bag is arranged in the wrapping belt. The resistivity test element, the wave velocity test element and the strain test element are arranged on an inner surface 7 of the wrapping belt. A hook and loop fastener is arranged on an outer surface 6 of the wrapping belt.
According to the standards of the Society for Rock Mechanics, the standard size of the core for parameter testing is cylindrical with a diameter of 25 mm, and according to the basic sizes of a drill bit and a core barrel in the basic drilling quality regulations, the full-diameter core has a diameter of 28-136 mm. In addition, according to rock quality designation (RQD) parameters (a ratio of a cumulative length of columnar cores equal to or greater than [0 cm in each footage to footage per round trip of drilling), in order to meet the test requirements of cores of various sizes (standard sizes and full-diameter sizes), the wrapping belt is designed as a rectangle with a width greater than or equal to 100 mm and a length greater than or equal to 450 mm.
(2) A resistivity test element 8 includes four electrodes (electrodes A, M, N and B). Pin probes are arranged on outer surfaces of the electrodes adhering to the core, and the tops of the pin probes arc provided with sponges capable of absorbing water. Water is added to the sponges during core resistivity parameter testing, so that the conductivity between the electrodes and the core and the testing accuracy arc improved. The four electrodes are vertically arranged and fixed. The four electrodes are arranged on a left side of the inner surface 7 of the wrapping belt and are 10 mm from an outer side, as shown in FIG. 2 (the inner surface 7 of the wrapping belt is upward).
(3) A wave velocity test element is an ultrasonic probe, including an excitation probe 9 and a receiving probe 10. The excitation probe 9 is configured to generate an ultrasonic signal and the receiving probe 10 is configured to receive an ultrasonic signal. The excitation probe 9 is fixed and disposed between the electrodes M and N of the resistivity test element 8. A sliding rail 11 is transversely arranged on a middle portion of an inner wall of the wrapping belt. The sliding rail 11 is made of a transversely bendable material and has a length greater than or equal to 175 mm. A distance between a left end of the sliding rail 11 (the inner surface 7 of the wrapping belt is upwards) and the excitation probe 9 is not greater than 39 mm. The receiving probe 10 is arranged on the sliding rail 11 and can move left and right. A certain frictional resistance exists between the 6 receiving probe 10 and the sliding rail 11, such that the receiving probe 10 is controlled in a static state when unmoved. A side of the sliding rail 11 is provided with a ruler 12 configured to control a distance (7? , D is the diameter of the core) between the excitation probe 9 and the receiving probe 10, and the arrangement is shown in FIG. 2.
(4) A strain test element 13 is a distributed optical fiber. One optical fiber is arranged in total around the core. An upper end C of the optical fiber is located over the electrode A of the resistivity test element 8, a vertical distance between a lower end D and the upper end C is 100 mm, and a transverse distance therebetween is 68 mm. The optical fiber is evenly distributed in the vertical range of the wrapping belt, and the arrangement is shown in FIG. 2 (the inner surface 7 of the wrapping belt is upward).
(5) A sealed pressurized air bag inside the inner layer and the outer layer of the wrapping belt The air bag is connected to an external inflation device (inflating and pressurizing latex ball) through a rubber hose | and is pressurized, and the resistivity test element, the wave velocity test element and the strain test element on the inner wall of the wrapping belt are controlled to be tightly coupled with the core.
(6) A hook and loop fastener on the outer surface 6 of the wrapping belt A rectangular steel ring 5 is arranged on the edge of the right side of the wrapping belt (the outer surface 6 of the wrapping belt is upward), and the inner diameter only allows the left side of the wrapping belt to pass through. The hook and loop fastener is disposed on the left side of the outer surface 6 of the wrapping belt, and one or more hook and loop fasteners may be arranged. The hook and loop fasteners arc usually set as female hook and loop fasteners. Except male hook and loop fasteners
3. other parts of the outer surface 6 of the wrapping belt are provided with male hook and loop fasteners 2. When parameter testing is implemented, the female hook and loop fastencr on the left side of the wrapping belt passes through the steel ring 5 on the right side (the inner surface 7 of the wrapping belt is inwards), is reversely stretched and quickly adheres to the male hook and loop fastener. and the wrapping belt is controlled to tightly wrap the core, as shown in FIG. 3.
2. The parameter testing host is mainly composed of a resistivity test module, a wave velocity test module and a strain test module. Each of the test modules is connected to the parameter test element through a multi-parameter integrated cable 4, and the cable passes through the inside of the wrapping belt.
7
A simple method for multi-parameter comprehensive testing of a core includes the following steps.
|. Core wrapping and holding.
According to a core size, a distance between an excitation probe 9 and a receiving probe 10 is adjusted, water is added to sponges on electrodes, and the core is wrapped and held with a wrapping belt: male hook and loop fasteners 2 are tightly bonded to female hook and loop fasteners 3; an inflation device (inflating and pressurizing latex ball) is used to pressurize a sealed pressurized air bag inside an inner layer and an outer layer of the wrapping belt through a rubber hose |, and a resistivity test element, a wave velocity test element and a strain test element on an inner wall of the wrapping belt are tightly coupled with the core.
2. Resistivity and wave velocity parameter testing (1) Resistivity testing When resistivity testing is performed, a testing host is connected to electrodes on a core wrapping holder through an integrated cable 4: a resistivity test module in the testing host sends a current loading instruction, and a continuous current is automatically loaded to a tested core through electrodes A and B; the resistivity test module in the testing host starts to acquire data, and a supply current /(4) between the electrodes A and B and a potential difference AU(P) between electrodes M and N are recorded. For each core, according the formula: 0, = 2 * AU ° A. _— 0 — 1 + 1 /
AM AN EM EN the resistivity value of each core sample is calculated by the testing host.
(2) Wave velocity testing The testing host is connected to an ultrasonic probe on the core wrapping holder through a cable, and a wave velocity test module in the testing host controls a pulse transmitter to emit a high-voltage puise, and the high-voltage pulse excites an ultrasonic signal in the excitation probe 9: the ultrasonic signal is received by the receiving probe 10 after passing through the tested core; and the testing host acquires data, performs analog-to-digital conversion of the data signal and then records time information. According to ultrasonic travel time / given in the time information and 8 according to the formula: ; Qore diameter D Wve velocity V= ——« — ——— Utrasonic travel time t a wave velocity of the tested core is calculated.
3. Strain parameter background value testing The core is subjected to strain background value testing in a free state. After the core is wrapped by the wrapping belt, a distributed optical fiber is tightly coupled with the core, and a series of strain sampling points are obtained according to the core size testing host. One sampling point corresponds to one spatial coordinate (x, y, z) on the core. The distributed optical fiber is connected to the testing host; a strain test module in the testing host controls and transmits an optical signal to the optical fiber; and after the optical signal is transmitted, the strain test module measures Rayleigh scattering signal information in the optical fiber, thereby parsing a series of background data on the strain sampling points.
4. Strain parameter testing under a loaded state Axial pressure is applied to the core by using an axial pressure loading device, and strain data is continuously acquired during this dynamic process 10 capture the strain value generated during the rock fracture until the core sample is completely destroyed. After the test is started, the axial pressure loading device gradually applies axial pressure to the core, and the strain test module in the testing host controls the optical fiber to test strain conditions of the core. Strain values at a series of strain sampling points are parsed by the strain test module and compared with the background data to obtain a strain value a which occurs due to the axial pressure and corresponds to each sampling point. In mapping software, a three-dimensional model of strain distribution of the core under pressure is constructed according to a three-dimensional model of the core and spatial coordinates and the strain values of several sampling points, so as to express the core strain test results finely.
Specific examples are used for illustration of the principles and implementations of the disclosure. The description of the foregoing examples is only used to help illustrate the method and its core ideas of the disclosure. In addition, persons of ordinary skill in the art can make various modifications in terms of specific implementations and scope of application in accordance with 9 the teachings of the disclosure.
In conclusion, the content of this specification shall not be construed as a limitation to the disclosure.
Claims (9)
- What is claimed is: |. A portable device for multi-parameter comprehensive testing of a core, comprising a core wrapping holder and a parameter testing host, wherein the core wrapping holder comprises a wrapping belt and parameter test clements arranged on the wrapping belt, the wrapping belt for wrapping the core comprises an inner layer and an outer layer, a sealed pressurized air bag is arranged between the inner layer and the outer layer of the wrapping belt, the pressurized air bag is connected to an inflation device through a rubber hose, and the test elements comprise a resistivity test element, a wave velocity test element and a strain test element which are in signal link with the parameter testing host.
- 2. The portable device for multi-parameter comprehensive testing of a core according to claim I, wherein the wrapping belt is made of a material which is not casy to stretch, and the wrapping belt is a rectangle with a length greater than or equal to 100 mm and a length greater than or equal to 450 mm; and both ends of the wrapping belt are bonded through a hook and loop fastener.
- 3. The portable device for multi-parameter comprehensive testing of a core according to claim |. wherein the resistivity test clement comprises electrodes A, M, N and B, pin probes are arranged on outer surfaces of the four electrodes adhering to the core, and the tops of the pin probes are provided with sponges capable of absorbing water; the four electrodes are vertically arranged on a left side of an inner surface of the wrapping belt and are 10 mm away from an outer side, and the four clectrodes are fixed.
- 4. The portable device for multi-parameter comprehensive testing of a core according to claim3. wherein the wave velocity test element comprises an excitation probe and a receiving probe, the two probes are ultrasonic probes, and the excitation probe is arranged between the electrode M and the electrode N; a sliding rail is transversely arranged on a middle portion of an inner wall of the wrapping belt, and the receiving probe is slidably arranged on the sliding rail.
- 5. The portable device for multi-parameter comprehensive testing of a core according to claim 4, wherein the sliding rail is made of a transversely bendable material and has a length greater than or equal to 175 mm, and a distance between a left end of the sliding rail and the excitation probe is not greater than 39 mm; and a side of the sliding rail is provided with a ruler for controlling a distance between the excitation probe and the receiving probe.
- 6. The portable device for multi-parameter comprehensive testing of a core according to claim 113, wherein the strain test clement is a distributed optical fiber, one optical fiber distributed in a vertical range on the inner surface of the wrapping belt is arranged around the core, an upper end C of the optical fiber is located above the electrode À, a vertical distance between a lower end D and the upper end C is 100 mm, and a transverse distance therebetween is 68 mm.
- 7. The portable device for multi-parameter comprehensive testing of a core according to claim |, wherein a rectangular steel ring is arranged on the edge of one side of the resistivity test clement close to the resistivity test element, and the other side of the wrapping belt is fixed by a hook and loop fastener after passing through the steel ring.
- 8. The portable device for multi-parameter comprehensive testing of a core according to claim I, wherein the parameter testing host comprises a resistivity test module, a wave velocity test module and a strain test module, each of the test modules is connected to the parameter test element through a multi-parameter integrated cable, and the cable passes through the inside of the wrapping belt.
- 9. A simple method for multi-parameter comprehensive testing of a core applied to the portable device for multi-parameter comprehensive testing of a core according to any one of claims | to 8, comprising the following steps: 1) core wrapping and holding: according to a core size, adjusting a distance between an excitation probe and a receiving probe, adding water to sponges on four electrodes in a resistivity test clement, wrapping and holding the core with a wrapping belt and sticking the core tightly by a hook and loop fastener; using an inflation device to pressurize a pressurized air bag, so that the resistivity test element, a wave velocity test element and a strain test element on an inner wall of the wrapping belt are coupled with the core; 2) resistivity testing: connecting a testing host to the four electrodes of the resistivity test element on a core wrapping holder through a cable, sending a current loading instruction by a resistivity test module in the testing host, automatically loading a continuous current to a tested core through electrodes A and B, starting to acquire data by the resistivity test module in the testing host, and recording a supply current / between the electrodes A and B and a potential difference AU between electrodes M and N, wherein a resistivity value of each core sample is as follows: 12 a 2m AU PET 1 1° Cam 7 ANT mm Tan) 3) wave velocity testing: connecting the testing host to an ultrasonic probe on the core wrapping holder through a cable, and controlling, by a wave velocity test module in the testing host, a pulse generator to emit a high-voltage pulse. wherein the high-voltage pulse excites an ultrasonic signal in the excitation probe, and the ultrasonic signal is received by the receiving probe after passing through the tested core; acquiring data by the testing host, performing analog-to- digital conversion of the data signal by the testing host and then recording time information, and calculating a wave velocity of the tested core according to ultrasonic travel time / given in the time information v= 2 . wherein D is a diameter of the core; 4) strain parameter background value testing: subjecting the core to strain background value testing in a free state, wherein after the core is wrapped by the wrapping belt, a distributed optical fiber is tightly coupled with the core, a series of strain sampling points are obtained according to the core size testing host, one sampling point corresponds to one spatial coordinate on the core, and the distributed optical fiber is connected to the testing host; controlling and transmitting an optical signal to the optical fiber by a strain test module in the testing host; after the optical signal is transmitted, measuring Rayleigh scattering signal information in the optical fiber by the strain test module, thereby parsing background data on the strain sampling points: and 5) strain parameter testing under a loaded state: applying axial pressure to the core by using an axial pressure loading device, and continuously acquiring strain data during this dynamic process to capture the strain value generated during the rock fracture until the core sample is completely destroyed.13
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910998630.5A CN110595905A (en) | 2019-10-21 | 2019-10-21 | Portable rock core multi-parameter comprehensive testing device and testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LU102275A1 LU102275A1 (en) | 2021-03-22 |
| LU102275B1 true LU102275B1 (en) | 2021-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU102275A LU102275B1 (en) | 2019-10-21 | 2019-10-25 | Portable device and simple method for multi-parameter comprehensive testing of core |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN110595905A (en) |
| LU (1) | LU102275B1 (en) |
| WO (1) | WO2021077397A1 (en) |
| ZA (1) | ZA202007391B (en) |
Families Citing this family (3)
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| CN111289576A (en) * | 2020-02-04 | 2020-06-16 | 中国矿业大学(北京) | Mining device, roof rock mass monitoring device and method |
| CN113295536B (en) * | 2021-05-21 | 2022-07-22 | 海南联达森贸易有限公司 | Intelligent detection system and detection method for production and processing performance of moulded coal |
| CN114111617B (en) * | 2021-12-13 | 2023-10-10 | 中交第二航务工程局有限公司 | Inflatable capsule structure for detecting pipeline linearity and detection method |
Family Cites Families (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087528A1 (en) * | 1982-02-26 | 1983-09-07 | Centro Corporation | Position sensing device |
| JP2003035691A (en) * | 2001-07-23 | 2003-02-07 | Univ Kansai | Apparatus for measuring geological characteristic in rock |
| US7040156B2 (en) * | 2003-08-21 | 2006-05-09 | William Crockford | Flexible membrane encapsulated strain measurement instrument and method of manufacture |
| US7080562B2 (en) * | 2003-10-17 | 2006-07-25 | Qortek, Inc. | High-sensitivity pressure conduction sensor for localized pressures and stresses |
| CN101520317B (en) * | 2009-04-10 | 2011-10-26 | 山东大学 | Rock deforming and cracking three-dimensional dynamic testing system based on fiber strain sensing |
| CN201749062U (en) * | 2010-08-25 | 2011-02-16 | 安徽理工大学 | Test device of rock fracture rupture process under action of high confined water |
| CN102175366A (en) * | 2011-03-05 | 2011-09-07 | 河南理工大学 | Fiber bragg grating (FBG) testing device and testing method for rock three-dimensional stress state |
| CN202948063U (en) * | 2012-11-12 | 2013-05-22 | 中国石油集团西部钻探工程有限公司 | Sealing type core resistivity measuring clamp |
| CN103033565B (en) * | 2012-12-07 | 2014-10-15 | 山东大学 | Acoustical emitting and resistivity joint monitoring device and monitoring method of fracture process of rock specimen |
| CN103235338B (en) * | 2013-03-25 | 2015-06-10 | 中国石油大学(华东) | Rock fracture parameter inversion method |
| CN104101647A (en) * | 2013-04-15 | 2014-10-15 | 中国石油化工股份有限公司 | System and method for testing supersonic-wave speed of rock under simulated reservoir conditions |
| CN203688412U (en) * | 2013-10-31 | 2014-07-02 | 山东科技大学 | Novel true triaxial rock seepage holder |
| CN103884604B (en) * | 2014-04-08 | 2015-12-09 | 中国矿业大学 | A kind of multifunctional high-temperature high pressure three axle coal petrography test unit and method |
| CN103954690B (en) * | 2014-04-25 | 2014-12-17 | 中国科学院武汉岩土力学研究所 | Method and device for synchronously measuring rock sound wave and acoustic emission |
| CN204789263U (en) * | 2015-06-23 | 2015-11-18 | 安徽理工大学 | Pressure -bearing rock failure mechanism of rock unstability process and developments infiltration characteristic test device |
| CN104931803B (en) * | 2015-07-01 | 2017-08-11 | 清华大学 | A kind of insulating materials surface potential variation real-time measurement system |
| CN105466783B (en) * | 2015-11-23 | 2019-01-11 | 中国人民解放军理工大学 | The tube wall crack propagation velocity test device and method of metal tube pressure explosion bulge test |
| CN105334310B (en) * | 2015-12-07 | 2016-06-01 | 山东科技大学 | Rock sample electrical property feature test set and testing method under multi-scenarios method state |
| CN105973698B (en) * | 2016-05-19 | 2018-11-09 | 大连海事大学 | Method of measuring resistivity and device in a kind of low temperature rock compressed creep process |
| CN106199206B (en) * | 2016-07-08 | 2019-02-01 | 中国石油大学(北京) | The measuring device and its measurement method of core vertically and horizontally dielectric parameter |
| CN106323999B (en) * | 2016-08-12 | 2018-03-09 | 中国科学院地质与地球物理研究所 | A kind of rock hydraulic fracturing experiment crack intervention Enhanced Imaging method |
| CN206074460U (en) * | 2016-09-06 | 2017-04-05 | 安徽理工大学 | A kind of quick scanning means of portable scalable drum type brake core |
| CN106772678A (en) * | 2016-12-16 | 2017-05-31 | 安徽理工大学 | A kind of wellhole many reference amounts method for surveying of rock deformation destructive characteristics |
| CN108240942A (en) * | 2016-12-26 | 2018-07-03 | 中国科学院地质与地球物理研究所 | A kind of rock fracture experimental system and experimental method |
| US10060898B2 (en) * | 2017-03-07 | 2018-08-28 | Ramesh Chandra Gupta | Expandable jacket for triaxial, unconfined and uniaxial compression tests and test device for three-dimensional consolidation and settlement tests |
| CN106989687A (en) * | 2017-04-27 | 2017-07-28 | 安徽理工大学 | Country rock method of testing and test system |
| CN109141960A (en) * | 2018-07-06 | 2019-01-04 | 绍兴文理学院 | A kind of in-situ test method obtaining rock parameter |
| CN209215096U (en) * | 2018-12-14 | 2019-08-06 | 西南交通大学 | A kind of apparent resistivity measuring device in self-action rock damage and failure test |
| CN109557185A (en) * | 2018-12-21 | 2019-04-02 | 安徽理工大学 | Rock core fastener and core test equipment |
| CN211013839U (en) * | 2019-10-21 | 2020-07-14 | 安徽理工大学 | Portable rock core multi-parameter comprehensive testing device |
-
2019
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| ZA202007391B (en) | 2022-04-28 |
| WO2021077397A1 (en) | 2021-04-29 |
| CN110595905A (en) | 2019-12-20 |
| LU102275A1 (en) | 2021-03-22 |
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