CN219608604U - Weak coal rock damage instability simulation test device - Google Patents
Weak coal rock damage instability simulation test device Download PDFInfo
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- CN219608604U CN219608604U CN202320378421.2U CN202320378421U CN219608604U CN 219608604 U CN219608604 U CN 219608604U CN 202320378421 U CN202320378421 U CN 202320378421U CN 219608604 U CN219608604 U CN 219608604U
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Abstract
The utility model discloses a weak coal rock damage instability simulation test device, which comprises: a pressure chamber; a water storage tank with a hydraulic pump inside; the conductivity test probe is arranged in the inner cavity of the pressure chamber and is connected with the conductivity tester; a water storage tank; a heat resistance coil arranged outside the pressure chamber; a first/second pressure vessel connected to the interior of the pressure chamber; pressurizing means connected to the first/second pressure vessels, respectively; an ultrasonic probe arranged in the inner cavity of the pressure chamber, and connected with an ultrasonic detector; strain gauges symmetrically arranged on two sides of an inner cavity of the pressure chamber are connected with the resistance strain gauge; copper sheet electrodes symmetrically arranged on two sides of the inner cavity of the pressure chamber are connected with the apparent resistivity meter; the acoustic emission sensor is arranged in the inner cavity of the pressure chamber and is connected with the acoustic emission instrument; and the upper computer is respectively connected with the conductivity tester, the ultrasonic detector, the resistance strain gauge and the acoustic emission instrument.
Description
Technical Field
The utility model relates to the field of coal rock analysis, in particular to a weak coal rock damage instability simulation test device.
Background
The coal mine in China has huge resource potential, however, the resources of the shallow coal seam are gradually reduced, and the deep coal seam is gradually excavated.
The geological condition of the deep coal seam is complex, and the safe and efficient exploitation of the deep coal and rock is severely restricted. The research of the rock damage and damage destabilization mechanism under the coupled condition of seepage-temperature-stress field is one of the problems of the forefront of international rock mechanics, and is one of the most basic research works of deep underground engineering such as mine excavation.
The coal rock is corroded by water chemistry, the water-rock function weakens the connection of mineral particles or corrodes crystal lattices to reduce the strength of the coal rock, and in addition, the aqueous solution can also take away corrosive minerals in the coal rock, so that the long-term stability of mine engineering is threatened. Coal rock is a product of geological history, and during the formation and development of the coal rock, the coal rock mass has a large number of fracture surfaces with different orders due to the influence of internal force geological action and external force geological action. On the one hand, the quantitative determination method of the coal rock damage comprises CT scanning microcrack, an electrical measurement method, a laser speckle method, an ultrasonic detection method, an acoustic emission method, a slice observation method and the like, and the more common nondestructive test method comprises an ultrasonic detection method, an acoustic emission method, an electrical measurement method and a laser speckle method, wherein the ultrasonic detection method is used for carrying out compression test or creep test on the coal rock, and the damage degree of the coal rock is evaluated by analyzing the change of ultrasonic wave velocity through a preset probe. On the other hand, the influence of water-rock action, temperature and stress field on the damage, damage and instability of the weak coal rock is not negligible, and the coal rock is changed in the process of damage, cracking and instability, and the occurrence, development, penetration and the like of internal cracks of the coal rock can cause the change of the coal rock permeability, and the apparent resistivity of the coal rock and the conductivity of the solution are also changed.
Therefore, the research of coal rock damage and crack evolution has very important significance for the development of rock mass mechanics. With the rapid development of the infrastructure industry in China, a plurality of deep rock mass projects appear in the mining industry, the research of damage and instability of coal and rock under complex conditions such as deep mining roadways is not carried out, innovation and research of test equipment are not carried out, however, the research of an all-round instrument for measuring damage and instability of coal and rock is basically in blank fields in China, most of the research is to qualitatively describe macroscopic mechanical characteristics and the like of a coal and rock test piece under the action of water and rock, the damage and instability process of the coal and rock is researched by observing and monitoring the change characteristics, mineral composition, tensile strength and the like of the coal and rock test piece before and after reaction, the test is discontinuous in measured data, the damage and instability process of weak coal and rock can not be monitored in real time, and the lack of the device seriously hinders the research of the damage and instability process and mechanism of the weak coal and rock.
Disclosure of Invention
The utility model aims to: aiming at the defects of the prior art, the utility model provides the weak coal rock damage destabilization simulation test device which can synchronously obtain the ultrasonic wave speed change rule, the stress-strain change rule, the number and the position of acoustic emission events and the apparent resistivity value change rule and the solution conductivity value change rule caused by water solution permeation of a coal rock test piece, thereby obtaining the coal rock damage destabilization process under the coupling action of different seepage-temperatures and laying a foundation for researching the weak coal rock damage destabilization process and mechanism.
The technical scheme is as follows: a weak coal rock damage instability simulation test device is composed of the following components:
the pressure chamber is provided with an inner cavity for accommodating the coal rock test piece;
the bottom of the inner cavity of the water storage tank is provided with a hydraulic pump, and the water outlet of the hydraulic pump is connected with one side of the top end of the pressure chamber through a water pumping pipe and is communicated with the inner cavity of the pressure chamber;
the conductivity test probe is arranged in the inner cavity of the pressure chamber and is connected with the conductivity tester through a signal transmission wire;
the bottom of the pressure chamber is provided with a water outlet which is communicated with the water storage tank through a drain pipe, and the drain pipe is provided with a control valve;
the thermal resistance coil is arranged outside the pressure chamber and connected with the temperature controller;
the output end of the first pressure container is communicated with the inner cavity of the pressure chamber through a first pipeline;
the output end of the second pressure container is communicated with the inner cavity of the pressure chamber through a second pipeline;
the pressurizing device is connected with the first pressure container and the second pressure container through pipelines respectively;
the ultrasonic probe is arranged in the inner cavity of the pressure chamber and is connected with the ultrasonic detector through a signal transmission wire;
the strain gauges are symmetrically arranged on two sides of the inner cavity of the pressure chamber and are connected with the resistance strain gauge through signal transmission wires;
at least two copper sheet electrodes which are symmetrically arranged on two sides of the inner cavity of the pressure chamber and are connected with the apparent resistivity instrument through signal transmission wires;
at least two acoustic emission sensors arranged in the inner cavity of the pressure chamber; the acoustic emission sensor is connected with the acoustic emission instrument through a signal transmission wire;
the upper computer is respectively connected with the conductivity tester, the ultrasonic detector, the resistance strain gauge and the acoustic emission instrument through signal transmission wires.
Further, an insulating layer is arranged on the inner side of the pressure chamber.
Further, a first pressure gauge is arranged on the first pipeline, and a second pressure gauge is arranged on the second pipeline.
Further, an arc-shaped compression-resistant protective cover is arranged on the ultrasonic probe, and the ultrasonic probe is fixedly connected with the compression-resistant protective cover through an elastic rubber ring.
Further, the acoustic emission sensor is provided with an arc-shaped compression-resistant protective cover, and the acoustic emission sensor is fixedly connected with the compression-resistant protective cover through an elastic rubber ring.
Further, a hot melt adhesive waterproof layer or an HY-303 metal glue waterproof layer is arranged on the outer surface of the strain gauge, and an arc-shaped elastic rubber ring is further arranged on the outer side of the strain gauge.
Furthermore, the outer surface of the copper sheet electrode is provided with a hot melt adhesive waterproof layer or an HY-303 metal glue waterproof layer, and the outer side of the copper sheet electrode is also provided with an arc-shaped elastic rubber ring.
Furthermore, the water storage tank and the pressure chamber are all made of corrosion-resistant titanium alloy.
Furthermore, the surfaces of the signal transmission wire and the thermal resistance coil are coated with high-temperature-resistant material protection layers.
Further, the supercharging device is composed of a first pneumatic liquid booster pump and a second pneumatic liquid booster pump, the first pneumatic liquid booster pump is connected with the first pressure container through a pipeline, the second pneumatic liquid booster pump is connected with the second pressure container through a pipeline, and the supercharging device adjusts the osmotic pressure difference between the first pressure container and the second pressure container through the first pneumatic liquid booster pump and the second pneumatic liquid booster pump.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The device simple structure, with low costs, the operation of being convenient for: the supercharging device enables two ends of the coal rock test piece to be in different osmotic pressure differences through the first pressure container and the second pressure container, so that the damage, damage and instability processes and corresponding dynamic osmotic characteristics of the weak coal rock test piece under different osmotic pressure differences can be conveniently researched;
(2) By arranging the pressurizing device, the hydraulic pump and the temperature controller, the utility model can obtain the ultrasonic wave speed change rule, the stress strain evolution rule, the acoustic emission event number and position in the damage and damage destabilization process of the coal rock test piece under the conditions of different seepage, temperature and stress fields, the solution conductivity change rule and the coal rock apparent resistivity change rule caused by the seepage of the aqueous solution, obtain the damage and destabilization process of the coal rock under the coupling effect of different seepage-temperature-stress fields, automatically store and display the received test data by an upper computer, and lay a foundation for researching the damage and destabilization process and mechanism of the weak coal rock.
Drawings
FIG. 1 is a schematic structural diagram of a weak coal rock damage failure instability simulation test device, and a thermal resistance coil is not drawn in FIG. 1 due to the limited space of the drawing.
Fig. 2 is a schematic view of the structure of the pressure chamber with the coal rock test piece in use.
Wherein:
| 1-coal rock test piece | 2-pressure chamber |
| 3-ultrasonic probe | 4-ultrasonic detector |
| 5-acoustic emission sensor | 6-acoustic emission instrument |
| 7-strain gage | 8-resistance strain gauge |
| 9-temperature controller | 10-Heat resistance coil |
| 11-insulating layer | 12-signal transmission conductor |
| 13-Water storage tank | 14-hydraulic pump |
| 15-pumping pipe | 16-supercharging device |
| 17-first pressure vessel | 18-first pressure gauge |
| 19-second pressure vessel | 20-second pressure gauge |
| 21-conductivity tester | 22-conductivity test probe |
| 23-apparent resistivity meter | 24-copper sheet electrode |
| 25-control valve | 26-water storage tank |
| 28-upper computer |
The specific embodiment is as follows:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
FIG. 1 is a schematic structural diagram of a weak coal rock damage failure instability simulation test device. Fig. 2 is a schematic view of the structure of the pressure chamber with the coal rock test piece in use. Because of the limited space of the drawings, a thermal resistance coil 10 is not depicted in fig. 1, and as shown in fig. 1 and 2, a weak coal rock damage and instability simulation test device is composed of the following components:
a pressure chamber 2 provided with an inner cavity for accommodating the coal rock test piece 1;
the bottom of the inner cavity of the water storage tank 13 is provided with a hydraulic pump 14, and a water outlet of the hydraulic pump 14 is connected with one side of the top end of the pressure chamber 2 through a water suction pipe 15 and is communicated with the inner cavity of the pressure chamber 2;
the conductivity test probe 22 is arranged in the inner cavity of the pressure chamber 2, and the conductivity test probe 22 is connected with the conductivity tester 21 through the signal transmission wire 12;
the water storage tank 26 is provided with a water outlet at the bottom of the pressure chamber 2, the water outlet is communicated with the water storage tank 26 through a water outlet pipe, and the water outlet pipe is provided with a control valve 25;
a thermal resistance coil 10 arranged outside the pressure chamber 2 and connected with a temperature controller 9;
the output end of the first pressure container 17 is communicated with the inner cavity of the pressure chamber 2 through a first pipeline;
the output end of the second pressure container 19 is communicated with the inner cavity of the pressure chamber 2 through a second pipeline;
the pressurizing device 16 is connected with the first pressure container 17 and the second pressure container 19 through pipelines respectively;
an ultrasonic probe 3 arranged in the inner cavity of the pressure chamber 2, wherein the ultrasonic probe 3 is connected with an ultrasonic detector 4 through a signal transmission wire 12;
the strain gauges 7 are symmetrically arranged on two sides of the inner cavity of the pressure chamber 2, and the strain gauges 7 are connected with the resistance strain gauge 8 through signal transmission wires 12;
at least two copper sheet electrodes 24 symmetrically arranged on two sides of the inner cavity of the pressure chamber 2, wherein the copper sheet electrodes 24 are connected with a visual resistivity meter 23 through signal transmission wires 12;
at least two acoustic emission sensors 5 arranged in the inner cavity of the pressure chamber 2; the acoustic emission sensor 5 is connected with the acoustic emission instrument 6 through a signal transmission wire 12;
the upper computer 28 is respectively connected with the conductivity tester 21, the ultrasonic detector 4, the resistance strain gauge 8 and the acoustic emission instrument 6 through the signal transmission wires 12.
Further, an insulating layer 11 is provided inside the pressure chamber 2.
Further, a first pressure gauge 18 is provided on the first pipe, and a second pressure gauge 20 is provided on the second pipe.
Further, an arc-shaped compression-resistant protective cover is arranged on the ultrasonic probe 3, and the ultrasonic probe 3 is fixedly connected with the compression-resistant protective cover through an elastic rubber ring.
Further, an arc-shaped compression-resistant protective cover is arranged on the acoustic emission sensor 5, and the acoustic emission sensor 5 is fixedly connected with the compression-resistant protective cover through an elastic rubber ring.
Further, a hot melt adhesive waterproof layer is arranged on the outer surface of the strain gauge 7, and an arc-shaped elastic rubber ring is further arranged on the outer side of the strain gauge 7. In another embodiment, an HY-303 metal glue waterproof layer is arranged on the outer surface of the strain gauge 7, and an arc-shaped elastic rubber ring is further arranged on the outer side of the strain gauge 7.
Further, a hot melt adhesive waterproof layer is disposed on the outer surface of the copper sheet electrode 24, and an arc-shaped elastic rubber ring is disposed on the outer side of the copper sheet electrode 24. In another embodiment, the outer surface of the copper sheet electrode 24 is provided with an HY-303 metal glue waterproof layer, and the outer side of the copper sheet electrode 24 is also provided with an arc-shaped elastic rubber ring.
Further, the water storage tank 13, the water storage tank 26 and the pressure chamber 2 are all made of corrosion-resistant titanium alloy.
Further, the surfaces of the signal transmission wire 12 and the thermal resistance coil 10 are coated with a high temperature resistant material protection layer.
The ultrasonic detector 4 adopts a ZBL-U520 nonmetal ultrasonic detector 4, the ultrasonic probe 3 adopts a waterproof TCT40-16T ultrasonic probe 3, the ultrasonic detector 4 measures the ultrasonic wave velocity of the coal rock test piece 1 through the ultrasonic probe 3 and the signal transmission wire 12 transmits the measured data to the upper computer 28 in real time.
The acoustic emission instrument 6 adopts a DS5-16B type full-information acoustic emission information analyzer, the acoustic emission sensor 5 adopts an AE204SW waterproof insulation type acoustic emission sensor 5, the acoustic emission instrument 6 measures acoustic emission signals of the coal rock test piece 1 through the acoustic emission sensor 5 and transmits the measured data to the upper computer 28 in real time through the signal transmission wire 12.
The resistance strain gauge 8 adopts an LB-IV type multichannel digital strain gauge, and the resistance strain gauge 8 measures the stress-strain of the coal rock test piece 1 in real time through the strain gauge 7 and transmits the measured data to the upper computer 28 in real time through the signal transmission wire 12.
The visual resistivity meter 23 adopts a U-RT-1 type resistivity meter, the visual resistivity meter 23 measures the visual resistivity value of the coal rock test piece 1 in real time through the copper sheet electrode 24 and transmits the measured data to the upper computer 28 in real time through the signal transmission wire 12.
The conductivity tester 21 adopts a C66sharp waterproof conductivity tester 21, the ion concentration in the solution changes due to the hydrolysis reaction of coal and rock in water, the conductivity of the solution changes accordingly, the conductivity tester 21 measures the conductivity of the water solution in real time through the conductivity test probe 22 and transmits the measured data to the upper computer 28 in real time through the signal transmission wire 12.
And obtaining the damage and destruction process of the coal rock test piece 1 and the dynamic permeability characteristics corresponding to the damage and destruction process under the condition of multi-physical field coupling by analyzing the change rule of the ultrasonic wave speed, the number, the position, the stress-strain change rule, the apparent resistivity change rule and the conductivity value change rule of the acoustic emission events.
Further, the pressurizing device 16 is composed of a first pneumatic liquid pressurizing pump and a second pneumatic liquid pressurizing pump, the first pneumatic liquid pressurizing pump is connected with the first pressure container 17 through a pipeline, the second pneumatic liquid pressurizing pump is connected with the second pressure container 19 through a pipeline, and the pressurizing device 16 regulates the osmotic pressure difference between the first pressure container 17 and the second pressure container 19 through the first pneumatic liquid pressurizing pump and the second pneumatic liquid pressurizing pump. The first pressure gauge 18 and the second pressure gauge 20 show the osmotic pressure difference at two ends of the coal rock test piece 1, and the change sequence of the pressurizing device 16 is 0MPa, 1MPa, 2MPa, 3MPa, … … and 20MPa.
The pressure chamber 2 in the present embodiment is connected to the hydraulic pump 14 located in the water storage tank 13 through the water suction pipe 15, the pressure chamber 2 is connected to the water storage tank 26 through the water discharge pipe, the hydraulic pump 14 pumps the aqueous chemical solution in the water storage tank 13 into the pressure chamber 2 through the water suction pipe 15, the water discharge pipe is provided with the control valve 25, and the aqueous chemical solution in the pressure chamber 2 enters the water storage tank 26 through the water discharge pipe under the action of its own weight.
When the device is used, the coal rock test piece 1 is fixed in the pressure chamber 2 through a limiting snap ring and a limiting snap ring screw, one end of the coal rock test piece 1 is connected with the first pressure container 17, the other end of the coal rock test piece 1 is connected with the second pressure container 19, and an osmotic pressure difference is arranged between the first pressure container 17 and the second pressure container 19; the two acoustic emission sensors 5 are symmetrically arranged in the middle of the coal rock test piece 1.
The strain gauge 7, the thermal resistance coil 10, etc. are conventional techniques in the art, and their specific structures will not be described in detail.
The utility model relates to a weak coal rock damage instability simulation test device, which is used in particular:
selecting surrounding rock or drilling core of the coal mine face, and processing into a coal rock test piece 1 (with the size of phi 50mm multiplied by 100 mm) meeting the standard of test requirements in a laboratory;
the ultrasonic probes 3 are fixed on the upper side and the lower side of the coal rock test piece 1 and are connected with the ultrasonic detector 4 through signal transmission wires 12, the strain gauges 7 are symmetrically fixed on the upper side and the lower side of the coal rock test piece 1 through medical adhesives and are connected with the resistance strain gauge 8 through the signal transmission wires 12, and the acoustic emission sensors 5 are symmetrically fixed on the two sides of the coal rock test piece 1 through the medical adhesives and are connected with the acoustic emission instrument 6 through the signal transmission wires 12;
the hydraulic pump 14 pumps the water solution in the water storage tank 13 into the pressure chamber 2 through the water pumping pipe 15, simulates the influence of the water-rock chemical action on damage, damage and instability of the coal rock test piece 1, the pressurizing device 16 controls the osmotic pressure difference at two ends of the coal rock test piece 1 through the first pressure container 17 and the second pressure container 19, and the temperature controller 9 heats through the thermal resistance coil 10 and the heat preservation layer 11 and controls the temperature of the pressure chamber 2;
after the upper computer 28 is started, the ultrasonic detector 4, the resistance strain gauge 8 and the acoustic emission gauge 6 respectively measure the ultrasonic wave speed, the stress-strain value, the apparent resistivity value and the number and the position of acoustic emission events of the coal rock test piece 1 in an initial state through the ultrasonic probe 3, the strain gauge 7, the copper sheet electrode 24 and the acoustic emission sensor 5, and transmit measured data to the upper computer 28 in real time through the signal transmission wire 12, the conductivity tester 21 measures the conductivity of the aqueous solution in real time through the conductivity test probe 22 and transmits the measured data to the upper computer 28 in real time through the signal transmission wire 12, the pressure at two ends of the coal rock test piece 1 is gradually increased through the pressurizing device 16, for example, when the stress is 1MPa, 2MPa, 3MPa, … … and 20MPa, the temperature of the pressure chamber 2 can be changed by adjusting the temperature controller 9, for example, when the temperature is 0 ℃, 10 ℃, 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃ and 100 ℃, the ultrasonic wave speed change rule, the stress-strain evolution rule, the solution conductivity change rule and the coal rock apparent resistivity change rule caused by the number and the position of acoustic emission events and the water solution permeation and induction in the damage and instability process of the coal rock under the conditions of different stress, seepage and temperature are obtained, the damage and instability process of the coal rock under the coupling action of different seepage and temperature is obtained until the coal rock test piece 1 generates cracks or achieves the expected test purpose, and the test is stopped; finally, test data is extracted from the host computer 28 and analyzed.
It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. Elements and features described in one drawing or embodiment of the utility model may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that the illustration and description of components and processes known to those skilled in the art, which are not relevant to the present utility model, have been omitted in the drawings and description for the sake of clarity. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to fall within the scope of the utility model.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art will recognize that the embodiments may be suitably combined to form other embodiments as would be understood by those of skill in the art.
Claims (10)
1. The weak coal rock damage instability simulation test device is characterized by comprising the following components:
the pressure chamber is provided with an inner cavity for accommodating the coal rock test piece;
the bottom of the inner cavity of the water storage tank is provided with a hydraulic pump, and the water outlet of the hydraulic pump is connected with one side of the top end of the pressure chamber through a water pumping pipe and is communicated with the inner cavity of the pressure chamber;
the conductivity test probe is arranged in the inner cavity of the pressure chamber and is connected with the conductivity tester through a signal transmission wire;
the bottom of the pressure chamber is provided with a water outlet which is communicated with the water storage tank through a drain pipe, and the drain pipe is provided with a control valve;
the thermal resistance coil is arranged outside the pressure chamber and connected with the temperature controller;
the output end of the first pressure container is communicated with the inner cavity of the pressure chamber through a first pipeline;
the output end of the second pressure container is communicated with the inner cavity of the pressure chamber through a second pipeline;
the pressurizing device is connected with the first pressure container and the second pressure container through pipelines respectively;
the ultrasonic probe is arranged in the inner cavity of the pressure chamber and is connected with the ultrasonic detector through a signal transmission wire;
the strain gauges are symmetrically arranged on two sides of the inner cavity of the pressure chamber and are connected with the resistance strain gauge through signal transmission wires;
at least two copper sheet electrodes which are symmetrically arranged on two sides of the inner cavity of the pressure chamber and are connected with the apparent resistivity instrument through signal transmission wires;
at least two acoustic emission sensors arranged in the inner cavity of the pressure chamber; the acoustic emission sensor is connected with the acoustic emission instrument through a signal transmission wire;
the upper computer is respectively connected with the conductivity tester, the ultrasonic detector, the resistance strain gauge and the acoustic emission instrument through signal transmission wires.
2. The weak coal rock damage failure instability simulation test device according to claim 1, wherein an insulation layer is arranged on the inner side of the pressure chamber.
3. The weak coal rock damage failure instability simulation test device according to claim 1, wherein a first pressure gauge is arranged on the first pipeline, and a second pressure gauge is arranged on the second pipeline.
4. The weak coal rock damage instability simulation test device according to claim 1, wherein the ultrasonic probe is provided with an arc-shaped compression-resistant protective cover, and the ultrasonic probe is fixedly connected with the compression-resistant protective cover through an elastic rubber ring.
5. The weak coal rock damage instability simulation test device according to claim 1, wherein the acoustic emission sensor is provided with an arc-shaped compression-resistant protection cover, and the acoustic emission sensor is fixedly connected with the compression-resistant protection cover through an elastic rubber ring.
6. The weak coal rock damage failure simulation test device according to claim 1, wherein the outer surface of the strain gauge is provided with a hot melt adhesive waterproof layer or an HY-303 metal glue waterproof layer, and the outer side of the strain gauge is also provided with an arc-shaped elastic rubber ring.
7. The weak coal rock damage failure simulation test device according to claim 1, wherein the outer surface of the copper sheet electrode is provided with a hot melt adhesive waterproof layer or an HY-303 metal glue waterproof layer, and the outer side of the copper sheet electrode is also provided with an arc-shaped elastic rubber ring.
8. The weak coal rock damage instability simulation test device according to claim 1, wherein the water storage tank, the water storage tank and the pressure chamber are all made of titanium alloy.
9. The weak coal rock damage destabilization simulation test device according to claim 1, wherein the surfaces of the signal transmission wire and the thermal resistance coil are coated with a high-temperature resistant coating.
10. The weak coal rock damage failure simulation test device according to claim 1, wherein the pressurizing device is composed of a first pneumatic liquid pressurizing pump and a second pneumatic liquid pressurizing pump, the first pneumatic liquid pressurizing pump is connected with the first pressure container through a pipeline, the second pneumatic liquid pressurizing pump is connected with the second pressure container through a pipeline, and the pressurizing device regulates the osmotic pressure difference between the first pressure container and the second pressure container through the first pneumatic liquid pressurizing pump and the second pneumatic liquid pressurizing pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320378421.2U CN219608604U (en) | 2023-03-03 | 2023-03-03 | Weak coal rock damage instability simulation test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320378421.2U CN219608604U (en) | 2023-03-03 | 2023-03-03 | Weak coal rock damage instability simulation test device |
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| Publication Number | Publication Date |
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| CN219608604U true CN219608604U (en) | 2023-08-29 |
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| CN202320378421.2U Active CN219608604U (en) | 2023-03-03 | 2023-03-03 | Weak coal rock damage instability simulation test device |
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- 2023-03-03 CN CN202320378421.2U patent/CN219608604U/en active Active
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