CN113933481A - Rock fracture real-time monitoring system and method under freeze thawing condition - Google Patents
Rock fracture real-time monitoring system and method under freeze thawing condition Download PDFInfo
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- 238000010257 thawing Methods 0.000 title claims abstract description 74
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Abstract
A real-time monitoring system and method for rock fractures under freeze-thaw conditions comprise: the freezing and thawing box is used for freezing and thawing the rock sample; the rock sample is placed inside the freezing and thawing box, and the surface of the rock sample is provided with rock fractures; the temperature and pressure sensor is used for monitoring the temperature change and the pressure change of the rock fracture in the freezing and thawing process; the temperature and pressure sensor is arranged at the rock fracture; the fracture meter is used for monitoring the opening degree change of the rock fracture in the freezing and thawing process; the fracture meter is arranged at the rock fracture; the crack propagation meter is used for monitoring the tip propagation change of the rock fracture in the freezing and thawing process; the crack propagation meter is arranged at the rock fracture; the data processing device is used for processing the monitoring data of each part; the data processing device is arranged outside the freezing and thawing box and is respectively connected with the temperature pressure sensor, the crack meter and the crack propagation meter. The test is simple to operate and low in cost.
Description
Technical Field
The invention belongs to the technical field of rock mechanics, and particularly relates to a system and a method for monitoring rock fractures in real time under a freeze-thaw condition.
Background
With the development of economy in China, the infrastructure of high-altitude and high-cold regions in the west is increased day by day, such as the construction of Qinghai-Tibet railways, Qinghai-Tibet highways and Sichuan Tibet railways, and low-temperature frost heaving can cause irreversible damage to rock engineering in cold regions. A large number of primary cracks are distributed in the rock mass, water in the primary cracks of the rock mass can be frozen into ice under the low-temperature condition, the volume expansion is about 9 percent, the cracks are extruded, the primary cracks are promoted to be further expanded, and the safety and stability of the rock mass engineering are threatened.
At present, the method for monitoring the rock fracture frost heaving force under the low temperature condition can be divided into an indirect measurement method and a direct measurement method, the indirect measurement method comprises a photoelastic method and a fracture deformation monitoring method, the indirect measurement method needs to calculate the value of the frost heaving force by means of certain assumptions, the test precision is poor, and errors are difficult to control. The direct measurement method needs to use a single-point measurement sensor for measurement, the frost heaving force of the whole crack surface cannot be monitored in real time, the measured frost heaving force is different due to the fact that the single-point measurement sensor is arranged at different positions of the crack surface, the rock crack temperature under the freeze-thaw condition is mostly monitored in a single-point mode, and the temperature measurement point and the frost heaving force measurement point are not located at the same position, so that the temperature measurement point and the frost heaving force measurement point cannot be in one-to-one correspondence.
The patent with the publication number of CN112067636A and the name of the frost heaving deformation expansion real-time monitoring system and the monitoring method for the rock crack expansion deformation under the freezing and thawing condition provides a monitoring method for the rock crack expansion deformation under the freezing and thawing condition, a CT scanning system is modified and a freezing and thawing device is added, the expansion condition of the rock crack in the freezing and thawing process is monitored through a CT testing machine, however, the CT testing machine is more precise, the modification difficulty is large, the testing price is high, and when the size of a sample is overlarge, rays emitted by the CT testing machine hardly penetrate through the sample and cannot be monitored.
Disclosure of Invention
In view of the above, the present invention provides a real-time rock fracture monitoring system and method under freeze-thaw conditions that overcomes or at least partially solves the above problems.
In order to solve the technical problem, the invention provides a real-time rock fracture monitoring system under a freeze-thaw condition, which comprises:
the freezing and thawing box is used for freezing and thawing the rock sample; the rock sample is placed inside the freezing and thawing box, and the surface of the rock sample is provided with rock fractures;
the temperature and pressure sensor is used for monitoring the temperature change and the pressure change of the rock fracture in the freezing and thawing process; the temperature and pressure sensor is arranged at the rock fracture;
the fracture meter is used for monitoring the opening degree change of the rock fracture in the freezing and thawing process; the fracture meter is arranged at the rock fracture;
the crack propagation meter is used for monitoring the tip propagation change of the rock fracture in the freezing and thawing process; the crack propagation meter is arranged at the rock fracture;
the data processing device is used for processing the monitoring data of each part; the data processing device is arranged outside the freezing and thawing box and is respectively connected with the temperature pressure sensor, the crack meter and the crack propagation meter.
Preferably, the data processing apparatus includes: the freezing and thawing device comprises a first data acquisition line, a first data acquisition unit and a first data processor, wherein the first data acquisition unit and the first data processor are arranged outside the freezing and thawing box, the first end of the first data acquisition line penetrates through the freezing and thawing box and is connected with the temperature and pressure sensor, the second end of the first data acquisition line is connected with the first data acquisition unit, and the first data acquisition unit is connected with the first data processor.
Preferably, freeze thawing is provided with first through-hole on the case, first data acquisition line passes through first through-hole, be provided with first elasticity rubber buffer in the first through-hole, first elasticity rubber buffer parcel first data acquisition line and shutoff first through-hole.
Preferably, the data processing apparatus includes: the freeze thawing device comprises a second data acquisition line, a third data acquisition line, a second data acquisition unit, a third data acquisition unit and a second data processor, wherein the second data acquisition unit, the third data acquisition unit and the second data processor are all arranged outside the freeze thawing box, the first end of the second data acquisition line penetrates through the freeze thawing box and is connected with the crack indicator, the first end of the third data acquisition line penetrates through the freeze thawing box and is connected with the crack propagation meter, the second end of the second data acquisition line is connected with the second data acquisition unit, the second end of the third data acquisition line is connected with the third data acquisition unit, and the second data acquisition unit and the third data acquisition unit are both connected with the second data processor.
Preferably, freeze thawing is provided with second through-hole and third through-hole on the case, second data acquisition line passes through the second through-hole, third data acquisition line passes through the third through-hole, be provided with second elasticity rubber buffer in the second through-hole, second elasticity rubber buffer parcel second data acquisition line and shutoff the second through-hole, be provided with third elasticity rubber buffer in the third through-hole, third elasticity rubber buffer parcel third data acquisition line and shutoff the third through-hole.
Preferably, the temperature and pressure sensor is arranged on one side of the rock fracture, and the size of the temperature and pressure sensor is matched with the size of the rock fracture.
Preferably, the temperature and pressure sensor has a temperature detection point and a pressure detection point, the positions of the temperature detection point and the pressure detection point are coincident, and the detection frequencies of the temperature detection point and the pressure detection point are the same
Preferably, the fracture meter is arranged across the rock fracture, two ends of the fracture meter are correspondingly inserted into mounting holes at two ends of the rock fracture, epoxy resin seals are arranged in the mounting holes in a sealing mode, and two ends of the fracture meter are correspondingly inserted into the epoxy resin.
Preferably, the crack propagation meter is closely adhered to the surface of the rock sample, and the crack propagation meter is arranged at each of two tip positions of the rock fracture.
The invention also provides a real-time rock fracture monitoring method under the freeze-thaw condition, which is realized based on the real-time rock fracture monitoring system under the freeze-thaw condition, and comprises the following steps:
pretreating a rock sample and forming rock cracks on the surface of the rock sample;
disposing a temperature pressure sensor at the rock fracture;
setting a fracture gauge at the rock fracture;
setting a crack propagation meter at the rock fracture;
placing the rock sample into a freeze-thaw bin;
connecting the temperature and pressure sensor, the crack meter and the crack propagation meter with a data processing device outside the freezing and thawing box;
setting working parameters of the freezing and thawing box;
and monitoring the data of the data processing device in real time.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: according to the system and the method for monitoring the rock fracture in real time under the freeze-thaw condition, the frost heaving force and the temperature change condition of any point in the rock fracture can be clearly known, the expansion and deformation conditions of the rock fracture tip can be conveniently, economically and conveniently monitored, and a test sample with a large size can be tested; the real-time evolution law of the frost heaving force and the temperature in the rock fracture space under the freeze thawing condition and the expansion and deformation conditions of the fracture tip can be detected, and the method has the advantages of simple structure, simple test operation and low cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of a real-time rock fracture monitoring system under freeze-thaw conditions according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a real-time rock fracture monitoring system under freeze-thaw conditions according to an embodiment of the invention;
FIG. 3 is a schematic side view of a real-time rock fracture monitoring system under freeze-thaw conditions according to an embodiment of the present invention;
fig. 4 is a schematic top view of a real-time rock fracture monitoring system under freeze-thaw conditions according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Referring to fig. 1-4, in an embodiment of the present application, the present invention provides a real-time rock fracture monitoring system under freeze-thaw conditions, including:
a freezing and thawing box 1 for freezing and thawing a rock sample 6; the rock sample 6 is placed inside the freezing and thawing box 1, and rock cracks are formed on the surface of the rock sample 6;
the temperature and pressure sensor 2 is used for monitoring the temperature change and the pressure change of the rock fracture in the freezing and thawing process; the temperature and pressure sensor 2 is arranged at the rock fracture;
the fracture gauge 3 is used for monitoring the opening degree change of the rock fracture in the freezing and thawing process; the fracture gauge 3 is arranged at the rock fracture;
the crack propagation meter 4 is used for monitoring the tip propagation change of the rock fracture in the freezing and thawing process; the crack propagation meter 4 is arranged at the rock fracture;
a data processing device 5 for processing the monitoring data of each part; the data processing device 5 is arranged outside the freezing and thawing box 1 and is respectively connected with the temperature and pressure sensor 2, the crack meter 3 and the crack propagation meter 4.
In the embodiment of the application, when the real-time rock fracture monitoring system under the freeze-thaw condition provided by the application is used, firstly, the rock sample 6 is pretreated and rock fractures are formed on the surface of the rock sample, then the temperature and pressure sensor 2 is arranged at the rock fractures, the fracture meter 3 is arranged at the rock fractures, the crack propagation meter 4 is arranged at the rock fractures, at this time, the arrangement of all detection parts on the rock sample 6 is completed, then, the rock sample 6 is placed in the freeze-thaw box 1, the temperature and pressure sensor 2, the fracture meter 3 and the crack propagation meter 4 are connected with a data processing device outside the freeze-thaw box 1, then, the working parameters of the freeze-thaw box 1 are set according to needs, and the data of the data processing device, such as the freezing temperature, the melting temperature, the freezing duration and the like of the freeze-thaw box 1, are monitored in real time, The thawing duration is long, and then the conditions of frost heaving force, temperature, fracture expansion and opening displacement in the rock fracture in the freezing and thawing process are monitored through the data processing device 5.
In the embodiment of the present application, the data processing apparatus 5 includes: the freezing and thawing device comprises a first data acquisition line 51, a first data acquisition unit 52 and a first data processor 53, wherein the first data acquisition unit 52 and the first data processor 53 are arranged outside the freezing and thawing box 1, a first end of the first data acquisition line 51 penetrates through the freezing and thawing box 1 and is connected with the temperature and pressure sensor 2, a second end of the first data acquisition line 51 is connected with the first data acquisition unit 52, and the first data acquisition unit 52 is connected with the first data processor 53.
In the embodiment of the present application, the first data collector 52 is connected to a first data processor 53 (for example, a computer), and the first data collector 52 transmits data collected by the temperature and pressure sensor 2 (for example, the film temperature and pressure sensor 2) to the first data processor 53 to store and process the data, so as to finally obtain a real-time cloud picture of the frost heaving force and temperature change of the plane (rock fracture plane) where the rock fracture is located, a real-time change curve of the average frost heaving force, average temperature, maximum frost heaving force, minimum temperature on the whole rock fracture plane, and a real-time change curve of the frost heaving force and temperature at any point on the rock fracture plane. By recording the maximum frost heaving force and the position coordinates of the lowest temperature of the rock crack surface, the change information of the frost heaving force and the spatial position of the lowest temperature in the freezing and thawing process can be obtained.
In this application embodiment, freeze thawing case 1 is last to be provided with first through-hole, first data acquisition line 51 passes through first through-hole, be provided with first elasticity rubber buffer in the first through-hole, first elasticity rubber buffer parcel first data acquisition line 51 and shutoff first through-hole.
In this application embodiment, first through-hole allows first data acquisition line 51 to get into freeze thawing case 1, and first elasticity rubber buffer can prevent that external environment temperature from influencing the detection environment in freeze thawing case 1.
In the embodiment of the present application, the data processing apparatus 5 includes: a second data acquisition line 54, a third data acquisition line 55, a second data acquisition unit 56, a third data acquisition unit 57 and a second data processor 58, wherein the second data acquisition unit 56, the third data acquisition unit 57 and the second data processor 58 are all disposed outside the freeze-thaw box 1, a first end of the second data acquisition line 54 passes through the freeze-thaw box 1 and is connected with the fissure gauge 3, a first end of the third data acquisition line 55 passes through the freeze-thaw box 1 and is connected with the crack propagation gauge 4, a second end of the second data acquisition line 54 is connected with the second data acquisition unit 56, a second end of the third data acquisition line 55 is connected with the third data acquisition unit 57, and both the second data acquisition unit 56 and the third data acquisition unit 57 are connected with the second data processor 58.
In this application embodiment, the fissure meter 3 can measure the change of rock fissure opening degree in the freeze thawing process, and its working principle is: when the opening degree of the rock crack changes, the resistance of the moving end of the potentiometer in the crack meter 3 can be changed, the change quantity of the resistance value reflects the deformation value of the rock crack, and the increase or decrease of the resistance value indicates the direction of the crack deformation. The fracture meter 3 is connected to a second data collector 56, the second data collector 56 is connected to a second data processor 58 (such as a computer), and corresponding fracture deformation monitoring software is installed in the second data processor 58, so that the data collected by the fracture meter 3 can be analyzed.
In the embodiment of the application, the crack propagation meter 4 is a detection part which takes a glass fiber as a substrate and is covered with an equidistant kama copper sensitive wire grid, and the working principle of the crack propagation meter is as follows: when the rock crack expands under the action of the frost heaving force, the wire grid is broken, and the total resistance value of the crack extensometer 4 can be correspondingly changed, so that the expansion length and the expansion speed of the crack can be calculated. The crack propagation meter 4 is connected to a third data collector 57, the third data collector 57 is connected to a second data processor 58 (for example, a computer), and the second data processor 58 is installed with corresponding crack propagation monitoring software, so that the data collected by the crack propagation meter 4 can be analyzed.
In the embodiment of the present application, the crack propagation meter 4 also reflects the propagation condition of the crack by collecting the change of the resistance value, and is the same as the crack meter 3, so the crack propagation meter and the crack propagation meter may share one second data processor 58 and one data collector, that is, the second data collector 56 and the third data collector 57 may be the same.
In the embodiment of this application, freeze thawing case 1 is last to be provided with second through-hole and third through-hole, second data acquisition line 54 passes through the second through-hole, third data acquisition line 55 passes through the third through-hole, be provided with second elasticity rubber buffer in the second through-hole, second elasticity rubber buffer parcel second data acquisition line 54 and shutoff the second through-hole, be provided with third elasticity rubber buffer in the third through-hole, third elasticity rubber buffer parcel third data acquisition line 55 and shutoff the third through-hole.
In this application embodiment, the second through-hole allows second data acquisition line 54 to get into freeze thawing case 1, and the third through-hole allows third data acquisition line 55 to get into freeze thawing case 1, and second elasticity rubber buffer and third elasticity rubber buffer can prevent that external environment temperature from influencing the detection environment in freeze thawing case 1.
In the embodiment of the application, the temperature and pressure sensor 2 is arranged on one side of the rock fracture, and the size of the temperature and pressure sensor 2 is matched with that of the rock fracture.
In the embodiment of the application, the temperature and pressure sensor 2 is arranged on one side of the rock crack, and the size of the temperature and pressure sensor is matched with the size of the rock crack surface, so that each position on the rock crack surface can be monitored.
In the embodiment of the present application, the temperature and pressure sensor 2 has a temperature detection point and a pressure detection point, the positions of the temperature detection point and the pressure detection point are coincident, and the detection frequencies of the temperature detection point and the pressure detection point are the same
In the embodiment of the application, the whole surface of the temperature and pressure sensor 2 is composed of a series of measuring points, wherein the temperature measuring points and the pressure measuring points are overlapped to ensure that one point can measure both pressure and temperature.
In the embodiment of the application, the fracture gauge 3 spans the rock fracture, two ends of the fracture gauge 3 are correspondingly inserted into mounting holes at two ends of the rock fracture, epoxy resin is sealed in the mounting holes, and two ends of the fracture gauge 3 are correspondingly inserted into the epoxy resin.
In the embodiment of the application, the installation of the fracture gauge 3 requires two installation holes to be drilled on the surface of the rock sample 6, and the depth and the diameter of the installation holes are related to the specification of the selected fracture gauge 3. And inserting the two ends of the crack meter 3 into the mounting holes, and sealing and fixing the crack meter by using epoxy resin.
In the embodiment of the application, the crack propagation meter 4 is closely adhered to the surface of the rock sample 6, and the crack propagation meter 4 is arranged at two tip positions of the rock fracture.
In the embodiment of the present application, in order to improve the monitoring accuracy, the crack propagation meter 4 needs to be closely attached to the rock surface so as to be closely adjacent to the rock crack tip. Since the rock fracture has two tips, it cannot be determined from which end the rock fracture will propagate under the effect of the frost heave force, and therefore the crack propagation meter 4 should be arranged at both tip positions of the fracture.
According to the system and the method for monitoring the rock fracture in real time under the freeze-thaw condition, the frost heaving force and the temperature change condition of any point in the rock fracture can be clearly known, the expansion and deformation conditions of the rock fracture tip can be conveniently, economically and conveniently monitored, and a test sample with a large size can be tested; the real-time evolution law of the frost heaving force and the temperature in the rock fracture space under the freeze thawing condition and the expansion and deformation conditions of the fracture tip can be detected, and the method has the advantages of simple structure, simple test operation and low cost.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rock fracture real-time monitoring system under freeze thawing conditions is characterized by comprising:
the freezing and thawing box is used for freezing and thawing the rock sample; the rock sample is placed inside the freezing and thawing box, and the surface of the rock sample is provided with rock fractures;
the temperature and pressure sensor is used for monitoring the temperature change and the pressure change of the rock fracture in the freezing and thawing process; the temperature and pressure sensor is arranged at the rock fracture;
the fracture meter is used for monitoring the opening degree change of the rock fracture in the freezing and thawing process; the fracture meter is arranged at the rock fracture;
the crack propagation meter is used for monitoring the tip propagation change of the rock fracture in the freezing and thawing process; the crack propagation meter is arranged at the rock fracture;
the data processing device is used for processing the monitoring data of each part; the data processing device is arranged outside the freezing and thawing box and is respectively connected with the temperature pressure sensor, the crack meter and the crack propagation meter.
2. The system for real-time monitoring of rock fractures under freeze-thaw conditions according to claim 1, wherein the data processing device comprises: the freezing and thawing device comprises a first data acquisition line, a first data acquisition unit and a first data processor, wherein the first data acquisition unit and the first data processor are arranged outside the freezing and thawing box, the first end of the first data acquisition line penetrates through the freezing and thawing box and is connected with the temperature and pressure sensor, the second end of the first data acquisition line is connected with the first data acquisition unit, and the first data acquisition unit is connected with the first data processor.
3. The system for monitoring rock fractures in real time under freeze-thaw conditions according to claim 2, wherein a first through hole is formed in the freeze-thaw box, the first data acquisition line passes through the first through hole, a first elastic rubber plug is arranged in the first through hole, and the first elastic rubber plug wraps the first data acquisition line and blocks the first through hole.
4. The system for real-time monitoring of rock fractures under freeze-thaw conditions according to claim 1, wherein the data processing device comprises: the freeze thawing device comprises a second data acquisition line, a third data acquisition line, a second data acquisition unit, a third data acquisition unit and a second data processor, wherein the second data acquisition unit, the third data acquisition unit and the second data processor are all arranged outside the freeze thawing box, the first end of the second data acquisition line penetrates through the freeze thawing box and is connected with the crack indicator, the first end of the third data acquisition line penetrates through the freeze thawing box and is connected with the crack propagation meter, the second end of the second data acquisition line is connected with the second data acquisition unit, the second end of the third data acquisition line is connected with the third data acquisition unit, and the second data acquisition unit and the third data acquisition unit are both connected with the second data processor.
5. The real-time rock fracture monitoring system under freeze thawing conditions according to claim 4, wherein a second through hole and a third through hole are arranged on the freeze thawing box, the second data acquisition line passes through the second through hole, the third data acquisition line passes through the third through hole, a second elastic rubber plug is arranged in the second through hole, the second elastic rubber plug wraps the second data acquisition line and blocks the second through hole, a third elastic rubber plug is arranged in the third through hole, and the third elastic rubber plug wraps the third data acquisition line and blocks the third through hole.
6. The system for real-time monitoring of rock fractures under freeze-thaw conditions according to claim 1, wherein the temperature and pressure sensor is arranged at one side of the rock fracture, and the size of the temperature and pressure sensor matches the size of the rock fracture.
7. The system for monitoring rock fractures under freeze-thaw conditions in real time according to claim 1, wherein the temperature and pressure sensor has a temperature detection point and a pressure detection point, the positions of the temperature detection point and the pressure detection point are coincident, and the detection frequencies of the temperature detection point and the pressure detection point are the same.
8. The system for monitoring the rock fractures in real time under the condition of freeze thawing according to claim 1, wherein the fracture meters are arranged across the rock fractures, two ends of the fracture meters are correspondingly inserted into mounting holes at two ends of the rock fractures, epoxy resin seals are arranged in the mounting holes in a sealing mode, and two ends of the fracture meters are correspondingly inserted into the epoxy resin.
9. The system for monitoring the rock fracture in real time under the freeze-thaw condition according to claim 1, wherein the crack propagation meter is closely adhered to the surface of the rock sample, and the crack propagation meter is disposed at two tip positions of the rock fracture.
10. A method for real-time monitoring of rock fractures under freeze-thaw conditions, which is implemented based on the real-time rock fracture monitoring system under freeze-thaw conditions as claimed in any one of claims 1-9, and comprises the steps of:
pretreating a rock sample and forming rock cracks on the surface of the rock sample;
disposing a temperature pressure sensor at the rock fracture;
setting a fracture gauge at the rock fracture;
setting a crack propagation meter at the rock fracture;
placing the rock sample into a freeze-thaw bin;
connecting the temperature and pressure sensor, the crack meter and the crack propagation meter with a data processing device outside the freezing and thawing box;
setting working parameters of the freezing and thawing box;
and monitoring the data of the data processing device in real time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200330.1A CN113933481A (en) | 2021-10-14 | 2021-10-14 | Rock fracture real-time monitoring system and method under freeze thawing condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111200330.1A CN113933481A (en) | 2021-10-14 | 2021-10-14 | Rock fracture real-time monitoring system and method under freeze thawing condition |
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| CN113933481A true CN113933481A (en) | 2022-01-14 |
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Application publication date: 20220114 |