CN219608617U - Multifunctional indoor rock burst test system - Google Patents
Multifunctional indoor rock burst test system Download PDFInfo
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- CN219608617U CN219608617U CN202320381985.1U CN202320381985U CN219608617U CN 219608617 U CN219608617 U CN 219608617U CN 202320381985 U CN202320381985 U CN 202320381985U CN 219608617 U CN219608617 U CN 219608617U
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Abstract
The utility model belongs to the technical field of machinery, and particularly relates to a multifunctional indoor rock burst test system. Wherein the steel frame is fixed on the rigid base; one end of the loading platform passes through the arch hole of the steel frame and is carried on the rigid base; placing a rigid pressure-bearing platform on the loading platform; placing a rigid cushion block on the rigid pressure-bearing platform; placing a test block on the rigid cushion block; the normal stroke piston loads the test block from top to bottom above the steel frame; one side of the steel frame is fixed with a tangential fixed piston, and the other side is provided with a tangential stroke piston for loading the test block; a transparent protection plate is arranged in the arch hole of the steel frame; fixing an acoustic emission sensor on a test block, and connecting an acoustic emission data acquisition instrument of the acoustic emission sensor; the normal stroke piston is provided with a force sensor and a displacement sensor and is connected with a data acquisition device of the direct shear apparatus through a data conversion line. According to the utility model, high-precision control and multi-element data acquisition of an indoor rock burst test can be realized through the laser positioning centering device, the high-speed camera and the acoustic emission device.
Description
Technical Field
The utility model belongs to the technical field of machinery, and particularly relates to a multifunctional indoor rock burst test system.
Background
The deep-buried water conveyance tunnel has complex geological conditions and high ground stress, and is extremely easy to generate rock burst disasters. The rock burst is a surrounding rock ejection damage phenomenon caused by hard rock excavation unloading under the high ground stress condition, seriously threatens the safety of personnel and equipment, and afflicts the safe and efficient construction of the deep-buried tunnel. Therefore, the development of mechanism research and risk assessment of rock burst is of great significance to ensuring safety and stability of the deep-buried tunnel. The rock burst phenomenon of deep rock is reappeared and the discrimination of rock burst tendency is carried out by adopting an indoor single-axis compression loading mode, so that the method is an important basic work for the research of the rock burst characteristic mechanism and the risk assessment of the deep-buried tunnel.
The existing single-shaft compression test equipment basically comprises a vertical stroke piston, a rigid frame, a base, a force sensor, a displacement sensor, system software and the like. Because the system rigidity of the test equipment is higher, the strain energy stored in the test machine in the loading process is less, and the rock burst phenomenon of the rock sample is difficult to reproduce sometimes. In addition, the existing equipment for the rock burst test does not integrate important functions such as automatic centering, acoustic emission monitoring, high-speed image capturing and the like, and the rock burst test data are single.
In the uniaxial compression test process, accurate centering of the rock test block needs to be ensured, otherwise, the test curve cannot reflect the actual condition of rock deformation; on the other hand, in the process of compression deformation of the rock until the rock burst is broken, micro-burst signals are released continuously, and acquisition of the signals is beneficial to analysis of the inoculation process of the rock burst. At the moment of rock burst damage, through cracks are formed on the surface of the rock, rock blocks are ejected and splashed, and the capturing record of the moment is beneficial to analyzing the rock burst form and can be used as an auxiliary basis for discriminating the rock burst tendency. Therefore, an indoor rock burst test system with the functions has strong practical significance.
Disclosure of Invention
In order to solve the problems, the utility model discloses a multifunctional indoor rock burst test system, which integrates a laser positioning centering device, a high-speed camera, an acoustic emission device and a visual operation platform on the basis of a rock direct shear apparatus, and can realize high-precision control, multi-element data acquisition and real-time display of an indoor rock burst test.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a multifunctional indoor rock burst test system, which comprises: rigid base, steelframe, loading platform, rigid pressure-bearing platform, wherein:
the steel frame is fixed on the rigid base; one end of the loading platform passes through the arch hole of the steel frame and is carried on the rigid base; a rigid pressure-bearing platform is placed on the loading platform; a rigid cushion block is arranged on the rigid pressure-bearing platform; placing a test block on the rigid cushion block; the normal stroke piston loads the test block from top to bottom above the steel frame; one side of the steel frame is fixed with a tangential fixed piston, and the other side is provided with a tangential stroke piston for loading the test block;
a transparent protection plate is arranged in the arch hole of the steel frame;
fixing an acoustic emission sensor on the test block, wherein the acoustic emission sensor is connected with an acoustic emission data acquisition instrument;
the normal stroke piston is provided with a force sensor and a displacement sensor and is connected with a data acquisition device of the direct shear apparatus through a data conversion line.
More preferably, a white background plate is fixed at the rear of the steel frame; the white background plate is parallel to the transparent protection plate.
More preferably, the middle lower part of the transparent protection plate and the middle part of the tangential stroke piston are respectively fixed with a laser positioning centering device; two centering strips are arranged on the peripheral wall of the rigid cushion block, and the connecting line between the two centering strips and the center of the rigid cushion block is 90 degrees; a positioning line is marked on the top of the rigid cushion block by taking the circle center as the center; the test block is aligned with the positioning line and placed on the rigid cushion block, and the laser positioning and centering devices are respectively irradiated on the two centering strips.
More preferably, a camera group is also arranged on the steel frame; the camera set comprises a camera support frame, a telescopic rod and a camera; the camera support frame is fixed in front of the beam plate of the steel frame; the camera support frame is connected with one end of the telescopic rod, and the other end of the telescopic rod is connected with the camera; when the telescopic rod is extended to the longest, the camera can be aligned with the center of the test block.
More preferably, a light supplement lamp is installed on the transparent protection plate; the centers of the test block, the light supplementing lamp and the camera are in a straight line.
More preferably, the transparent protection plate is installed in the arch hole of the steel frame through a sliding rail on the steel frame.
More preferably, the acoustic emission sensor is wrapped with foam protection glue and bonded to the test block; the foam protective glue is stuck in a crisscross mode.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, high-precision control and multi-element data acquisition of an indoor rock burst test can be realized through the laser positioning centering device, the high-speed camera and the acoustic emission equipment;
2. the safety of operators and instruments can be effectively protected by the installed protective plates and the foam rubber of the sound emission sensor.
Drawings
FIG. 1 is a general layout of a multi-functional indoor rock burst test system of the present utility model;
FIG. 2 is a view showing an assembly structure of the transparent shield plate of the present utility model;
FIG. 3 is a block diagram of the assembly of the rigid spacer and the test block of the present utility model;
in the accompanying drawings:
the device comprises a rigid base 1, a steel frame 2, a loading platform 3, a rigid pressure-bearing platform 4, a rigid cushion block 5, a transparent protection plate 6, a laser positioning and centering device 7, a camera group 8, an acoustic emission sensor 9 and a white background plate 10; the device comprises a test block 100, a direct shear apparatus data acquisition device 200 and an acoustic emission data acquisition apparatus 300;
a tangential fixed piston 21, a tangential stroke piston 22, a normal stroke piston 23, and a sliding rail 24;
a centering bar 51 and a positioning line 52;
a light supplementing lamp 61;
a laser pen sleeve 71, a laser pen 72;
a camera support 81, a telescopic rod 82, and a camera 83;
acoustic emission connecting wire 91, foam protection glue 92.
Detailed Description
For a better understanding of the present utility model, the content of the present utility model will be further elucidated with reference to the drawings and examples, but the content of the present utility model is not limited to the following examples only.
The utility model provides a multifunctional indoor rock burst test system, the structure of which is shown in figures 1, 2 and 3, and the multifunctional indoor rock burst test system comprises a rigid base 1, a steel frame 2, a loading platform 3 and a rigid bearing platform 4.
The steel frame 2 is fixed on the rigid base 1; the steel frame 2 is an n-type structure with an arch hole formed by a beam plate, a left side plate and a right side plate, the left side plate of the steel frame 2 is provided with a tangential fixed piston 21, the right side is provided with a tangential stroke piston 22, and the upper part is provided with a normal stroke piston 23;
one end of the loading platform 3 passes through the arch hole of the steel frame 2 and is carried on the rigid base 1, and the other end is arranged outside the rigid base 1; a rigid pressure-bearing platform 4 is arranged on the loading platform 3;
the rigid pressure-bearing platform 4 is a hollow cuboid steel member, and has higher rigidity and good self-stabilization capability; a rigid cushion block 5 is arranged on the rigid pressure-bearing platform 4;
placing a test block 100 on the rigid cushion block 5;
in order to enable the normal stroke piston 23 to accurately contact the test block 100, when the rigid cushion block 5 is placed, the center of the rigid cushion block 5 is aligned with the center of the rigid pressure-bearing platform 4; the center of the test block 100 is aligned with the center of the rigid pad 5.
To collect and display the acoustic emission signals during the test, an acoustic emission sensor 9 is fixed on the test block 100, and the acoustic emission sensor 9 is connected with an acoustic emission data collector 300.
In order to collect and display the load and deformation of the test block in the test process, a force sensor and a displacement sensor are arranged on the normal stroke piston 23 and are connected with the direct shear apparatus data collection device 200 through a data conversion line.
In order to protect safety of operators and instruments, sliding rails 24 are arranged on the inner sides of two side plates of the steel frame 2, and the transparent protection plate 6 is arranged in an arch hole of the steel frame 2 through the sliding rails 24; the transparent protection plate 6 is made of toughened glass, so that ejection of high-speed rock slices can be effectively resisted; when the transparent protection plate 6 is pushed upwards to the top end through the sliding rail, a certain space is reserved below the transparent protection plate for operators to perform test operations such as sample placement, acoustic emission sensor installation and the like.
In order to realize accurate and rapid centering of the test block 100 (namely, realize that the test block 100 is just positioned at the center of the normal stroke piston 23 when loaded), the middle lower part of the transparent protection plate 6 and the middle part of the tangential stroke piston 22 are respectively fixed with laser positioning centering devices 7, and each laser positioning centering device 7 comprises a laser pen sleeve 71 and a laser pen 72; the laser pen sleeves 71 can be adhered and fixed with the transparent protection plate 6 and the surface of the tangential stroke piston 22 through AB glue, and a laser pen 72 is arranged in each laser pen sleeve 71. Simultaneously, two centering strips 51 are arranged on the peripheral wall of the rigid cushion block 5, and the connecting line between the two centering strips 51 and the center of the rigid cushion block 5 is 90 degrees; a positioning line 52 is marked on the top of the rigid cushion block 5 by taking the center of a circle as the center, when in test, the test block 100 is aligned with the positioning line 52 and placed on the rigid cushion block 5, and two laser pens 72 respectively irradiate on the two centering strips 51, so that the test block 100 is considered to be accurately centered.
In order to record the rock slice ejection condition at the moment of rock burst test, a camera set 8 is also arranged on the steel frame 2; the camera group 8 includes a camera support 81, a telescopic rod 82, and a camera 83. A camera support 81 is fixed in front of the beam plate of the steel frame 2 through rivets; the camera support frame 81 is connected with one end of the telescopic rod 82, and the other end of the telescopic rod 82 is connected with the camera 83; when the telescoping rod 82 is extended to its longest, the camera 83 is just aimed at the center of the test block 100.
In order to improve the definition of the slow motion video shot by the camera 83, a white background plate 10 is fixed at the rear of the steel frame 2, and the white background plate 10 is parallel to the transparent protection plate 6; meanwhile, the light supplementing lamp 61 is arranged on the transparent protection plate 6, and the centers of the test block 100, the light supplementing lamp 61 and the camera 83 are in a straight line during test. The white background board 10 provides clear background and also plays a role in protecting operators and instruments.
The data acquisition device 200 of the direct shear apparatus is internally provided with signal display analysis software of the direct shear apparatus, and is connected with a display, and load-time, displacement-time and load-displacement curves are displayed in real time through the display.
In order to ensure that the acoustic emission sensor 9 cannot be damaged when being ejected along with a rock slice, the acoustic emission sensor 9 is wrapped and firmly bonded by using foam protection glue 92 on a test block 100; the foam protection glue 92 is applied in a crisscross pattern.
The wiring terminal of the acoustic emission sensor 9 is connected with the acoustic emission data acquisition instrument 300 through an acoustic emission connecting wire 91 and a preamplifier, so as to acquire and store signals in real time; meanwhile, the acoustic emission data acquisition instrument 300 is internally provided with acoustic emission signal display analysis software and is connected with a display to display the change condition of acoustic emission signals in real time.
The working process of the utility model is as follows:
starting the power supplies of the direct shear apparatus data acquisition device 200 and the acoustic emission data acquisition apparatus 300, turning on the power supply of the camera 83, and turning on the light supplementing lamp 61 and the two laser pens 72;
pushing the transparent protection plate 6 up to the top end of the sliding rail, and simultaneously compressing the telescopic rod 82 to the top end, so that a space is reserved for placing the test block 100, centering the rigid cushion block 5 and arranging the acoustic emission sensor 9;
the test block 100 is aligned with the positioning line 52 and placed on the rigid cushion block 5, and the position of the rigid cushion block 5 is adjusted back and forth and left and right, so that the two laser pens 72 just irradiate on the two centering bars 51, and the accurate centering of the test block 100 is indicated.
Using vaseline as acoustic emission coupling agent, coating on one side of acoustic emission sensor 9, closely adhering to test block 100, wrapping the other side of acoustic emission sensor 9 with two foam protective adhesives 92 in crisscross manner, and adhering acoustic emission sensor 9 on test block 100; the acoustic emission connecting wire 91 is used for connecting the acoustic emission sensor 9 with the acoustic emission data acquisition instrument 300;
draw transparent guard plate 6 along the slide rail down to the bottom, stretch telescopic link 82 to the bottom, start the experiment: the direct shear device data acquisition device 200 gives a command to control the normal stroke piston to apply axial force, the acoustic emission data acquisition device 300 gives a command to start acquiring signals of the acoustic emission sensor 9, and the high-speed camera 83 starts recording;
after the test block 100 to be tested is broken and the rock burst occurs, the acoustic emission signals acquired by the acoustic emission data acquisition device 300, the load and displacement signals acquired by the direct shear device data acquisition device 200 and the rock burst image signals acquired by the high-speed camera are collected after the test is finished, and the data processing and analysis are performed by utilizing the information.
According to the utility model, high-precision control and multi-element data acquisition of an indoor rock burst test can be realized through a rock direct shear apparatus, a laser positioning centering, high-speed camera, an acoustic emission device, a visual operation platform and the like. The rock direct shear apparatus is used for carrying out a uniaxial compression rock burst test on a rock test block, can measure and store load and axial deformation values in real time, and is provided with a protection plate, so that the safety of operators and instruments can be effectively protected; the laser positioning centering device is used for enabling the rock test block to be positioned at the center of the normal stroke piston, so that eccentric compression of the test block is avoided; the high-speed camera is used for capturing rock burst inoculation and destruction processes in real time in the test process, and a white background plate and a light supplementing lamp are matched for improving the shooting effect of the rock burst; the acoustic emission device is used for automatically recording, storing and analyzing acoustic emission events in the test process; the visual operation platform consists of a direct shear apparatus software system and an acoustic emission software system, and can draw load-time, displacement-time, load-displacement curves and acoustic emission parameter-time curves in the test process in real time.
The above description is only an application embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto, and the scope of the claims should not be limited thereto, and any equivalent changes according to the technical solution of the present utility model should be covered in the protection scope of the present utility model.
Claims (7)
1. A multifunctional indoor rock burst test system, the multifunctional indoor rock burst test system comprising: rigid base (1), steelframe (2), loading platform (3), rigidity pressure-bearing platform (4), its characterized in that:
the steel frame (2) is fixed on the rigid base (1); one end of the loading platform (3) passes through the arch hole of the steel frame (2) and is carried on the rigid base (1); a rigid pressure-bearing platform (4) is arranged on the loading platform (3); a rigid cushion block (5) is arranged on the rigid pressure-bearing platform (4); a test block (100) is placed on the rigid cushion block (5); the normal stroke piston (23) loads the test block (100) from top to bottom above the steel frame (2); one side of the steel frame (2) is fixed with a tangential fixed piston (21), and the other side is provided with a tangential stroke piston (22) for loading the test block (100);
a transparent protection plate (6) is arranged in the arch hole of the steel frame (2);
an acoustic emission sensor (9) is fixed on the test block (100), and the acoustic emission sensor (9) is connected with an acoustic emission data acquisition instrument (300);
the normal stroke piston (23) is provided with a force sensor and a displacement sensor and is connected with the direct shear apparatus data acquisition device (200) through a data conversion line.
2. The multifunctional indoor rock burst test system according to claim 1, wherein:
a white background plate (10) is fixed at the rear of the steel frame (2); the white background plate (10) is parallel to the transparent protection plate (6).
3. A multifunctional indoor rock burst test system according to claim 1 or 2, characterized in that:
the middle lower part of the transparent protection plate (6) and the middle part of the tangential stroke piston (22) are respectively fixed with a laser positioning centering device (7); two centering strips (51) are arranged on the peripheral wall of the rigid cushion block (5), and the connecting line between the two centering strips (51) and the center of the rigid cushion block (5) is 90 degrees; a positioning line (52) is marked on the top of the rigid cushion block (5) by taking the circle center as the center; the test block (100) is aligned with the positioning line (52) and placed on the rigid cushion block (5), and the laser positioning and centering device (7) irradiates on the two centering strips (51) respectively.
4. A multifunctional indoor rock burst test system according to claim 3, characterized in that:
a camera group (8) is also arranged on the steel frame (2); the camera set (8) comprises a camera support frame (81), a telescopic rod (82) and a camera (83); the camera support frame (81) is fixed in front of the beam plate of the steel frame (2); the camera support frame (81) is connected with one end of the telescopic rod (82), and the other end of the telescopic rod (82) is connected with the camera (83); when the telescopic rod (82) is extended to the longest, the camera (83) can be aligned with the center of the test block (100).
5. The multifunctional indoor rock burst test system according to claim 4, wherein:
a light supplementing lamp (61) is arranged on the transparent protection plate (6); the centers of the test block (100), the light supplementing lamp (61) and the camera (83) are in a straight line.
6. The multifunctional indoor rock burst test system according to claim 1, wherein:
the transparent protection plate (6) is arranged in an arch hole of the steel frame (2) through a sliding rail (24) on the steel frame (2).
7. The multifunctional indoor rock burst test system according to claim 1, wherein:
the acoustic emission sensor (9) is wrapped by foam protection glue (92) and is adhered to the test block (100); the foam protection glue (92) is stuck in a crisscross mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320381985.1U CN219608617U (en) | 2023-03-03 | 2023-03-03 | Multifunctional indoor rock burst test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320381985.1U CN219608617U (en) | 2023-03-03 | 2023-03-03 | Multifunctional indoor rock burst test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219608617U true CN219608617U (en) | 2023-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320381985.1U Active CN219608617U (en) | 2023-03-03 | 2023-03-03 | Multifunctional indoor rock burst test system |
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| Country | Link |
|---|---|
| CN (1) | CN219608617U (en) |
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2023
- 2023-03-03 CN CN202320381985.1U patent/CN219608617U/en active Active
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