CN211573516U - Device for acquiring expansion parameters of non-through structural plane under carbon dioxide phase change pneumatic action - Google Patents
Device for acquiring expansion parameters of non-through structural plane under carbon dioxide phase change pneumatic action Download PDFInfo
- Publication number
- CN211573516U CN211573516U CN201921994830.5U CN201921994830U CN211573516U CN 211573516 U CN211573516 U CN 211573516U CN 201921994830 U CN201921994830 U CN 201921994830U CN 211573516 U CN211573516 U CN 211573516U
- Authority
- CN
- China
- Prior art keywords
- blast hole
- phase change
- carbon dioxide
- structural
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a carbon dioxide phase transition aerodynamic action down non-link up structural plane extension parameter acquisition device, send and split ware, a plurality of foil formula resistance strain gauge, high-speed camera, digital image processing system and super dynamic strain test system including PMMA thin plate, miniature phase transition. The middle part of the PMMA thin plate is drilled with blast holes in a penetrating way, the side surfaces are provided with non-penetrating structural surfaces, the first side surface is provided with a foil type resistance strain gauge, the second side surface is sprayed with speckles, and the micro phase change cracking device carries out supercritical carbon dioxide phase change pneumatic loading on the PMMA thin plate; the high-speed camera is used for recording an image of the second side surface, the ultra-dynamic strain testing system is used for acquiring the cracking strain and the cracking time of the crack, and the digital image processing system is used for obtaining a strain field on the surface of the PMMA thin plate and analyzing the crack propagation direction, the crack propagation length and the crack propagation speed. The utility model provides a technical scheme's beneficial effect is: the digital image test and the strain test can be simultaneously carried out, and the test method has high efficiency, low cost and strong feasibility.
Description
Technical Field
The utility model relates to a geotechnical engineering technical field especially relates to a carbon dioxide phase transition aerodynamic action is down non-link up structural plane extension parameter acquisition device.
Background
Carbon dioxide phase change fracturing has been successfully applied in many projects as an alternative to explosive blasting. The carbon dioxide phase change fracturing technology mainly takes phase energy difference in the phase change process of carbon dioxide as a rock breaking energy source, an explosion device is used for exciting a heating tube to generate heat during testing, liquid carbon dioxide is in a supercritical state in a phase change mode, after the liquid carbon dioxide is in the supercritical state in the phase change mode, the pressure in a carbon dioxide phase change fracturing device is continuously increased, after the pressure in the fracturing device exceeds the breaking pressure of a constant-pressure shear slice, the supercritical carbon dioxide is instantly released and phase-changed into high-pressure carbon dioxide gas, a pneumatic-dynamic effect is generated, rock mass is impacted, and the rock breaking effect is achieved.
The carbon dioxide phase change gas-dynamic load is complex, the load mainly comprises the impact stress wave and the high-pressure gas wedge effect, and the synergistic influence mechanism of the impact stress wave and the high-pressure gas wedge effect is not clear.
The common rock mass is composed of rock blocks and a structural plane, the structural plane is divided into a through structural plane and a non-through structural plane, the rock mass is often broken and related to the expansion of the non-through structural plane, the non-through structural plane is widely distributed in the rock mass, the rock mass fracture development is often expanded and extended along the structural plane under the action of blasting load until the rock breaking is completed, the non-through structural plane in the rock mass is a key medium factor influencing the blasting rock breaking effect, the expansion mechanism of the non-through structural plane under the action of carbon dioxide phase change gas is analyzed and researched, the theoretical research foundation for disclosing the carbon dioxide phase change cracking mechanism is provided, and the key for realizing the carbon dioxide phase change cracking efficient rock breaking in engineering is provided. Analyzing a through mechanism of the non-through structural surface, firstly acquiring an expansion key parameter of the non-through structural surface. Because the research on the expansion mechanism of the non-through structural plane under the action of the carbon dioxide phase change cracking technology is blank at present, the method for determining the expansion parameters of the non-through structural plane under the action of carbon dioxide phase change pneumatic is not related.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a non-through structure face extension parameter acquisition device under carbon dioxide phase transition pneumatic action aims at obtaining non-through structure face's extension length, direction and extension speed under the carbon dioxide phase transition pneumatic action, and test method is efficient, and is with low costs, and the feasibility is strong.
The embodiment of the utility model provides a non-through structure face extension parameter acquisition device under carbon dioxide phase transition pneumatic action, including PMMA sheet metal, miniature phase transition fracturing ware, a plurality of foil formula resistance strain gauges, high-speed camera, digital image processing system and super dynamic strain test system;
the PMMA thin plate is provided with a first side surface and a second side surface which are opposite, a blast hole penetrates through the middle of the PMMA thin plate, non-through structural surfaces located on one side of the blast hole are prefabricated on the first side surface and the second side surface, speckles are sprayed on the second side surface, a plurality of foil type resistance strain gauges are arranged on the first side surface, an energy discharge port of the miniature phase change cracking device is arranged in the blast hole, and the part extending out of the blast hole is located on the same side as the first side surface and used for carrying out supercritical carbon dioxide phase change pneumatic-dynamic loading on the PMMA thin plate;
the high-speed camera is opposite to the second side face and used for recording an image of the second side face, the ultra-dynamic strain testing system is electrically connected with the foil type resistance strain gauge and used for acquiring the cracking strain and the cracking time of a crack, the digital image processing system is electrically connected with the high-speed camera and used for acquiring a displacement field of the surface of the PMMA thin plate according to the image so as to further obtain a strain field of the surface of the PMMA thin plate, and the crack propagation direction, the propagation length and the propagation speed of the crack are analyzed by comparing the cracking strain and the cracking time of the crack.
Further, the device also comprises a filling device, a storage device and an excitation device;
the storage device is used for storing liquid carbon dioxide, the filling device is used for filling the liquid carbon dioxide into the miniature phase change cracking device, and the excitation device is used for carrying out phase change pneumatic-dynamic loading on the liquid carbon dioxide.
Further, the non-through structural surface is a blast hole communicated structural surface, the blast hole communicated structural surface is directly communicated with the blast hole, and the length of the blast hole communicated structural surface is smaller than the minimum crack length in the PMMA sheet pre-splitting experiment without the structural surface;
the long edge direction of the foil type resistance strain gauge is perpendicular to the extending direction of the blast hole communicated structure surface, and the end part of the blast hole communicated structure surface is arranged in a parallel and encrypted mode.
Furthermore, a plurality of foil type resistance strain gauges are arranged on two sides of the blast hole communicated structure surface in parallel, and the long edge direction of each foil type resistance strain gauge is parallel to the extending direction of the blast hole communicated structure surface.
Further, the non-through structural surface is a blast hole non-communicated structural surface, the blast hole non-communicated structural surface is not communicated with the blast hole, and the distance between the blast hole non-communicated structural surface and the blast hole is smaller than the minimum crack length in the PMMA sheet pre-splitting experiment without the structural surface;
the connecting line of the central point of the blast hole non-communicated structure surface and the circle center of the blast hole is perpendicular to the blast hole non-communicated structure surface, the long side direction of the foil type resistance strain gauge is perpendicular to the extending direction of the blast hole non-communicated structure surface, and the foil type resistance strain gauge is arranged at two ends of the blast hole non-communicated structure surface in a parallel and encrypted mode.
Furthermore, a plurality of foil type resistance strain gauges are arranged on two sides of the non-communicated structural surface of the blast hole in parallel, and the long edge direction of each foil type resistance strain gauge is parallel to the extending direction of the non-communicated structural surface of the blast hole.
Further, the distance between the end part of the non-communicated structure surface of the blast hole and the center of the blast hole is smaller than the maximum length of the crack of the PMMA sheet in the pre-splitting test.
Furthermore, an annular rubber pad is arranged between the side wall of the blast hole and the energy discharge port of the miniature phase change cracking device so as to block a gap between the side wall of the blast hole and the miniature phase change cracking device.
Further, the thickness of the annular rubber pad is not more than the vertical distance between the first side face and the second side face and the energy discharge port respectively.
Further, the width of the PMMA thin plate is 50-70 times of the radius of the blast hole.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: a non-through structural surface is arranged on the first side surface of the PMMA thin plate, dynamic strain testing can be performed by arranging the foil type resistance strain gauge on the first side surface, and a digital image can be acquired by arranging the non-through structural surface and speckles on the second side surface. The displacement field of the PMMA sheet is obtained through the combination of a high-speed camera and a digital image processing system during testing, the strain field on the surface of the PMMA sheet can be obtained after processing, the cracking strain and the cracking time of cracks are obtained through a contrast ultra-dynamic strain testing system, and the expansion length, the direction and the expansion speed of the non-through structural surface under the carbon dioxide phase change pneumatic action are obtained through comprehensive processing. The experimental method can obtain the expansion key parameters of the prefabricated non-through structural plane of the PMMA plate for the supercritical carbon dioxide phase change gas-action, is beneficial to the research of the carbon dioxide phase change gas-action rock breaking mechanism, can be used for simultaneously carrying out digital image test and strain test, and has high efficiency, low cost and strong feasibility.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a device for acquiring extended parameters of a non-through structural plane under the pneumatic action of carbon dioxide phase change;
FIG. 2 is a partial schematic view of the micro phase change frac apparatus of FIG. 1 inserted into a borehole;
FIG. 3 is a schematic diagram of a first side of the PMMA sheet of FIG. 1 provided with a non-through structural surface (the non-through structural surface is a non-through structural surface of a blast hole) and a foil type resistance strain gauge;
fig. 4 is a schematic diagram of a non-through structural surface (the non-through structural surface is a blast hole communication structural surface) and a foil type resistance strain gauge arranged on the first side surface of the PMMA sheet in fig. 1.
In the figure: the device comprises a 1-miniature phase change cracking device, a 2-non-through structural surface, a 3-foil type resistance strain gauge, a 4-first side surface, a 5-second side surface, a 6-high-speed camera, a 7-digital image processing system, an 8-ultra-dynamic strain testing system, a 9-light supplementing device, a 10-annular rubber pad, an 11-blast hole and a 12-energy discharge port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1 to 4, an embodiment of the present invention provides a device for obtaining an expansion parameter of a non-through structural plane under the action of carbon dioxide phase change aerodynamics, including a pneumatic-pneumatic loading system, a PMMA thin plate, a plurality of foil type resistance strain gauges 3, a high speed camera 6, a digital image processing system 7, a hyper-dynamic strain testing system 8 and a light supplementing device 9.
The pneumatic-pneumatic loading system comprises a micro phase change cracking device 1, a filling device, a storage device and an excitation device, wherein the storage device is used for storing liquid carbon dioxide, the filling device is used for filling the liquid carbon dioxide into the micro phase change cracking device 1, and the excitation device is used for carrying out phase change pneumatic-loading on the liquid carbon dioxide, which is the prior art and therefore is not described in detail.
The PMMA thin plate is made of a PMMA material, the transparent height is high, a model making system is adopted for making samples, and the model making system comprises a distance measuring tool, a cutting tool and a drilling tool. The PMMA thin plate is provided with a first side surface 4 and a second side surface 5 which are opposite, a blast hole 11 penetrates through the middle of the PMMA thin plate, and the first side surface 4 is prefabricated with a non-through structural surface 2 which is positioned on one side of the blast hole 11 by adopting a laser cutting technology. The second side surface 5 is sprayed with a plurality of circular speckles, and the diameters of the speckles are 0.25 mm-0.5 mm.
The energy discharge port 12 of the miniature phase change cracking device 1 is arranged in the blast hole 11 and is used for carrying out supercritical carbon dioxide phase change pneumatic-dynamic loading on the PMMA thin plate. When the blast hole 11 is drilled, the integrity of the wall of the blast hole 11 needs to be ensured, and the damage and the crack of the PMMA thin plate caused by drilling the blast hole 11 are avoided. An annular rubber pad 10 is arranged between the side wall of the blast hole 11 and an energy discharge port 12 of the miniature phase change cracking device 1 so as to block a gap between the side wall of the blast hole 11 and the miniature phase change cracking device 1. The thickness of the annular rubber gasket 10 is not greater than the vertical distance between the first side surface 4 and the second side surface 5 and the energy discharge port 12, so that the annular rubber gasket 10 cannot affect the energy discharge of the miniature phase change cracking device 1.
In order to avoid the influence of the boundary of the PMMA thin plate on the fracturing influence range, the thickness of the PMMA thin plate is larger than the sum of two times of the thickness of the annular rubber gasket 10 and the diameter of the energy discharge port 12 of the micro phase change fracturing device 1, the width of the PMMA thin plate is 50-70 times of the radius of the blast hole 11, and the influence of the boundary of the PMMA thin plate on the fracturing influence range can be avoided.
According to the position relation between the non-through structural surface 2 and the blast hole 11, the non-through structural surface 2 is divided into a blast hole communicated structural surface and a blast hole non-communicated structural surface, the blast hole communicated structural surface is directly communicated with the blast hole 11, and the blast hole non-communicated structural surface is not communicated with the blast hole 11. And (3) carrying out a pre-splitting test on the PMMA thin plate without the structural surface to obtain the minimum crack length and the maximum crack length of the PMMA thin plate with cracks.
Referring to fig. 4, when the non-through structural surface 2 is a borehole-connected structural surface, the length of the borehole-connected structural surface is less than the minimum crack length in the PMMA sheet pre-splitting experiment without the structural surface, so that the tip of the connected structural surface can continue to expand forward under the pneumatic action.
A plurality of foil resistance strain gauges 3 set up in first side 4, some 3 long limit directions of foil resistance strain gauges with the big gun hole intercommunication type structural plane extending direction is perpendicular, and is in the parallel encryption of big gun hole intercommunication type structural plane tip sets up. The other part of the foil type resistance strain gauge 3 is parallel to the extending direction of the blast hole communicated structure surface, and the two sides of the blast hole communicated structure surface are arranged in a parallel and encrypted mode. The strain conditions of the two sides of the communicated structural surface of the blast hole 11 can be tested, and the mechanism of tip crack initiation of the communicated structural surface under the action of gas and action is disclosed.
Referring to fig. 3, when the non-through structural surface 2 is a blasthole non-communicating structural surface, the distance between the blasthole non-communicating structural surface and the blasthole 11 is smaller than the minimum crack length in the PMMA sheet pre-splitting experiment without the structural surface, so that the non-communicating structural surface can be ensured to be influenced by pneumatic-pneumatic action. The plurality of the structure surfaces of the blast holes which are not communicated are arranged at equal intervals, the connecting line of the center point of the structure surface of the blast holes which are not communicated and the circle center of the blast hole 11 is vertical to the structure surface of the blast holes which are not communicated, and the distance between the end part of the structure surface of the blast holes which are not communicated and the center of the blast hole 11 is smaller than the minimum crack length of the PMMA sheet pre-cracking experiment crack, so that the structure surface of the blast holes which are not communicated can be ensured to be in the crack influence range.
A plurality of foil resistance strain gauges 3 set up in first side 4, some 3 long limit directions of foil resistance strain gauges with the big gun hole non-connected type structural plane extending direction is perpendicular, and is in big gun hole non-connected type structural plane both ends parallel encryption sets up. The other part of the foil type resistance strain gauge 3 is parallel to the extending direction of the blast hole communicated structure surface, and the two sides of the blast hole communicated structure surface are arranged in a parallel and encrypted mode. The strain condition of the central connecting line of the blast hole 11 and the blast hole non-communicated structural surface is tested, and the mechanism of tip crack initiation of the blast hole non-communicated structural surface under the gas-action condition is disclosed.
The light supplementing device 9 is opposite to the second side face 5 and used for irradiating the second side face 5, the high-speed camera 6 is opposite to the second side face 5 and used for recording images of the second side face 5, the ultra-dynamic strain testing system 8 is electrically connected with the foil type resistance strain gauge 3 and used for acquiring cracking strain and cracking time of cracks, the digital image processing system 7 is electrically connected with the high-speed camera 6 and used for acquiring a displacement field of the surface of the PMMA thin plate according to the images so as to obtain a strain field of the surface of the PMMA thin plate, comparing the cracking strain and the cracking time of the cracks and analyzing the crack propagation direction, the propagation length and the propagation speed of the cracks. The ultra-dynamic strain testing system 8 includes a resistance type strain gauge, a bridge box, a dynamic strain collector, a dynamic analyzer and a computer, which are prior art and not described in detail herein.
Specifically, a square PMMA thin plate is prefabricated, a hole is drilled in the middle of the PMMA thin plate to form a blast hole 11, and a non-through structural plane 2 is prefabricated by adopting a laser cutting technology; and a plurality of foil type resistance strain gauges 3 which are arranged in parallel are arranged on one side of the PMMA thin plate, which is provided with the non-through structural surface 2, and speckles are sprayed on the other side of the PMMA thin plate.
Carrying out supercritical carbon dioxide phase change pneumatic-dynamic loading on the prefabricated PMMA thin plate by using a miniature phase change cracking device 1; specifically, the miniature phase change cracking device 1 is assembled, liquid carbon dioxide is filled by using a filling device after the assembly is finished, the tightness of the miniature phase change cracking device 1 is checked after the filling is finished, and the miniature phase change cracking device is connected with an excitation device after the checking is finished; and completely inserting the energy discharge head of the micro phase change cracking device 1 into the blast hole 11, and exciting the micro phase change cracking device 1 by using the excitation device to carry out supercritical carbon dioxide phase change pneumatic-dynamic loading on the PMMA thin plate.
Recording the change condition of the surface of the PMMA sheet in an observation area by using a high-speed camera 6, and recording the whole process of crack initiation, expansion and penetration; acquiring the cracking strain and the cracking time of the crack by using the foil type resistance strain gauge 3 and the ultra-dynamic strain testing system 8; in a strain change time curve measured by the foil type resistance strain gauge 3, the strain corresponding to a conversion point for converting a strain value from nonlinear increase into linear increase is cracking strain.
And according to the change condition of the second side surface 5 of the PMMA thin plate, obtaining a displacement field on the surface of the PMMA thin plate by using a digital image processing system 7, further obtaining a strain field on the surface of the PMMA thin plate, comparing the cracking strain and the cracking time of the crack, and analyzing the crack propagation direction, the crack propagation length and the crack propagation speed. Specifically, a high-speed camera 6 is used for recording speckle patterns of the second side surface 5 of the PMMA sheet before and after deformation, a digital image processing system 7 is used for dispersing the speckle patterns into digital gray level patterns, correlation operation is carried out on the two digital gray level patterns to obtain extreme points of correlation coefficients, corresponding displacement and deformation information is further obtained, cracking strain and cracking time of the cracks are compared, and the crack propagation direction, the crack propagation length and the crack propagation speed are analyzed.
The utility model provides an among the technical scheme, be equipped with non-through structure face 2 at PMMA sheet metal first side 4, through being equipped with foil formula resistance strain gauge 3 at first side 4, can carry out dynamic strain test, second side 5 is equipped with the speckle, can carry out the digital image collection. The displacement field of the PMMA sheet during testing is obtained by combining the high-speed camera 6 with the digital image processing system 7, the strain field on the surface of the PMMA sheet can be obtained after processing, the cracking strain and the cracking time of cracks are obtained by the contrast ultra-dynamic strain testing system 8, and the expansion length, the direction and the expansion speed of the non-through structural surface 2 under the carbon dioxide phase change pneumatic action are obtained through comprehensive processing. The testing method has the advantages of high efficiency, low cost and strong feasibility.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A device for acquiring expansion parameters of a non-through structural plane under the action of carbon dioxide phase change pneumatics is characterized by comprising a PMMA thin plate, a miniature phase change crack generator, a plurality of foil type resistance strain gauges, a high-speed camera, a digital image processing system and a super-dynamic strain testing system;
the PMMA thin plate is provided with a first side surface and a second side surface which are opposite, a blast hole penetrates through the middle of the PMMA thin plate, non-through structural surfaces located on one side of the blast hole are prefabricated on the first side surface and the second side surface, speckles are sprayed on the second side surface, a plurality of foil type resistance strain gauges are arranged on the first side surface, an energy discharge port of the miniature phase change cracking device is arranged in the blast hole, and the part extending out of the blast hole is located on the same side as the first side surface and used for carrying out supercritical carbon dioxide phase change pneumatic-dynamic loading on the PMMA thin plate;
the high-speed camera is opposite to the second side face and used for recording an image of the second side face, the ultra-dynamic strain testing system is electrically connected with the foil type resistance strain gauge and used for acquiring the cracking strain and the cracking time of a crack, the digital image processing system is electrically connected with the high-speed camera and used for acquiring a displacement field of the surface of the PMMA thin plate according to the image so as to further obtain a strain field of the surface of the PMMA thin plate, and the crack propagation direction, the propagation length and the propagation speed of the crack are analyzed by comparing the cracking strain and the cracking time of the crack.
2. The device for acquiring the expansion parameters of the non-through structural plane under the action of the carbon dioxide phase change pneumatics as claimed in claim 1, further comprising a filling device, a storage device and an excitation device;
the storage device is used for storing liquid carbon dioxide, the filling device is used for filling the liquid carbon dioxide into the miniature phase change cracking device, and the excitation device is used for carrying out phase change pneumatic-dynamic loading on the liquid carbon dioxide.
3. The device for acquiring the propagation parameters of the non-through structural surface under the carbon dioxide phase change pneumatic action according to claim 1, wherein the non-through structural surface is a blast hole communicated structural surface, the blast hole communicated structural surface is directly communicated with the blast hole, and the length of the blast hole communicated structural surface is smaller than the minimum crack length in the PMMA sheet pre-cracking experiment without the structural surface;
the long edge direction of the foil type resistance strain gauge is perpendicular to the extending direction of the blast hole communicated structure surface, and the end part of the blast hole communicated structure surface is arranged in a parallel and encrypted mode.
4. The device for acquiring the expansion parameters of the non-through structural plane under the carbon dioxide phase change pneumatic action according to claim 3, wherein a plurality of foil type resistance strain gauges are arranged in parallel on both sides of the blasthole-communicated structural plane, and the long side direction of each foil type resistance strain gauge is parallel to the extension direction of the blasthole-communicated structural plane.
5. The device for acquiring the propagation parameters of the non-through structural surface under the carbon dioxide phase change pneumatic action according to claim 1, wherein the non-through structural surface is a blast hole non-communicated structural surface, the blast hole non-communicated structural surface is not communicated with the blast hole, and the distance between the blast hole non-communicated structural surface and the blast hole is smaller than the minimum crack length in the PMMA sheet pre-cracking experiment without the structural surface;
the connecting line of the central point of the blast hole non-communicated structure surface and the circle center of the blast hole is perpendicular to the blast hole non-communicated structure surface, the long side direction of the foil type resistance strain gauge is perpendicular to the extending direction of the blast hole non-communicated structure surface, and the foil type resistance strain gauge is arranged at two ends of the blast hole non-communicated structure surface in a parallel and encrypted mode.
6. The device for acquiring the parameters of the expansion of the non-through structural plane under the action of the carbon dioxide phase change pneumatics according to claim 5, wherein a plurality of the foil type resistance strain gauges are arranged in parallel on both sides of the non-connected structural plane of the blasthole, and the long side direction of the foil type resistance strain gauge is parallel to the extending direction of the non-connected structural plane of the blasthole.
7. The device for acquiring the propagation parameters of the non-through structural surface under the carbon dioxide phase change pneumatic action according to claim 5, wherein the distance between the end of the non-through structural surface of the blast hole and the center of the blast hole is smaller than the maximum length of the crack of the PMMA sheet in the pre-splitting experiment.
8. The device for acquiring the expansion parameters of the non-through structural plane under the carbon dioxide phase change pneumatic action according to claim 1, wherein an annular rubber pad is arranged between the side wall of the blast hole and the energy discharge port of the micro phase change cracking device so as to seal a gap between the side wall of the blast hole and the micro phase change cracking device.
9. The apparatus for acquiring extended parameters of a non-through structural plane under carbon dioxide phase change aerodynamics of claim 8, wherein the thickness of the ring-shaped rubber pad is not greater than the vertical distance between the first side surface and the second side surface and the energy discharge port, respectively.
10. The device for acquiring the parameters of the non-through structural plane expansion under the carbon dioxide phase change pneumatic action according to claim 8, wherein the width of the PMMA thin plate is 50-70 times of the radius of the blast hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921994830.5U CN211573516U (en) | 2019-11-18 | 2019-11-18 | Device for acquiring expansion parameters of non-through structural plane under carbon dioxide phase change pneumatic action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921994830.5U CN211573516U (en) | 2019-11-18 | 2019-11-18 | Device for acquiring expansion parameters of non-through structural plane under carbon dioxide phase change pneumatic action |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211573516U true CN211573516U (en) | 2020-09-25 |
Family
ID=72531130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921994830.5U Active CN211573516U (en) | 2019-11-18 | 2019-11-18 | Device for acquiring expansion parameters of non-through structural plane under carbon dioxide phase change pneumatic action |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211573516U (en) |
-
2019
- 2019-11-18 CN CN201921994830.5U patent/CN211573516U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104359776A (en) | Testing method of I-type crack dynamic fracture toughness under explosive load | |
| CN110926969A (en) | CO2Device and method for acquiring expansion parameters of non-through structural plane under phase change pneumatic action | |
| CN104949868A (en) | Blasting damaged rock sample preparation and micro-macro combined damage degree determination method | |
| CN104865124A (en) | Shale brittleness index determination method based on rock stress-strain curve and ultrasonic longitudinal wave velocity | |
| CN111579579B (en) | Multipoint omnibearing CO 2 Phase-change fracturing pressure time-course curve testing system and method | |
| CN105865907A (en) | True triaxial test fixture for simulating power disturbance type rock burst | |
| CN113504131B (en) | Test system and test method for testing II-type dynamic fracture toughness of rock under different normal stresses | |
| CN103868993A (en) | Method and device for acoustic discrimination of multistage yield points by rock triaxial single sample method | |
| CN104833590A (en) | New rock II-type fracture toughness test method | |
| CN108844835A (en) | A kind of test method of I type crackle Dynamic Fracture overall process parameter under explosive load | |
| CN208076301U (en) | A kind of active confining pressure and the sound loading experimental apparatus that explodes | |
| Huang et al. | Experimental investigation on the basic law of the fracture spatial morphology for water pressure blasting in a drillhole under true triaxial stress | |
| CN108375509A (en) | A kind of active confining pressure and the sound loading experimental apparatus that explodes | |
| CN108710762B (en) | Coal bed liquid CO2Method for judging cracking dominant direction of phase change oriented perforation | |
| CN109443943B (en) | Method and equipment for constructing rock sample strength criterion material parameters | |
| CN205910055U (en) | A true triaxial test anchor clamps that is used for energetic disturbance type rock template explosion to plan | |
| CN105259051B (en) | A kind of method for rapidly testing of engineering rock mass mechanical characteristic | |
| CN211573516U (en) | Device for acquiring expansion parameters of non-through structural plane under carbon dioxide phase change pneumatic action | |
| CN103487324A (en) | Composite soil body compression-shearing fracture failure test method and test device | |
| CN116411959A (en) | Oil-gas well fracturing test device and method for simulating real stratum environment | |
| CN114383949B (en) | Method for testing bearing capacity and energy dissipation rule of rock mass containing cavity | |
| CN104198304A (en) | Indoor testing device and indoor testing method for unloading disturbance effect caused by repeated excavation of deep-buried circular tunnel | |
| CN211318054U (en) | Experimental system for researching action mechanism of explosive stress wave of surrounding rock | |
| CN112014240B (en) | Rock mass shearing parameter evaluation method based on in-situ surface single fracture | |
| CN209927607U (en) | Plane strain loading destroys test device of overall process macroscopical |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |