CN113984535B - Deep rock mass rockburst dynamic disaster simulation device and test method - Google Patents
Deep rock mass rockburst dynamic disaster simulation device and test method Download PDFInfo
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- CN113984535B CN113984535B CN202111259219.XA CN202111259219A CN113984535B CN 113984535 B CN113984535 B CN 113984535B CN 202111259219 A CN202111259219 A CN 202111259219A CN 113984535 B CN113984535 B CN 113984535B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The invention discloses a simulation device and a test method for deep rock mass rockburst dynamic disasters, which can simulate deep rock mass rockburst states, acquire more accurate data and reduce the occurrence of dynamic disasters. The simulation device of this embodiment, including preceding loader, back loader, left loader, right loader, go up loader and loader down, preceding loader is located the front side of rock simulation sample, and back loader is located the rear side of rock simulation sample, and left loader is located the left side of rock simulation sample, and right loader is located the right side of rock simulation sample, goes up the loader and is located the top of rock simulation sample, and the loader is located the below of rock simulation sample down.
Description
Technical Field
The invention relates to a rock burst simulation device of a rock mass, in particular to a simulation device and a test method of deep rock mass rock burst dynamic disasters.
Background
After the deep rock mass is disturbed by the dynamic excavation, the internal stress of the rock mass is redistributed, and the energy is released, so that the internal damage of the rock mass is induced near the excavation face of the rock mass due to the unloading effect. After being disturbed by power, the rock mass can further induce power disasters. Therefore, it is necessary to develop a simulation device and a test method for testing dynamic disasters of surrounding rocks caused by rock mass unloading.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the simulation device and the test method for the deep rock mass rockburst dynamic disaster can simulate the deep rock mass rockburst state, obtain more accurate data and reduce the occurrence of the dynamic disaster.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
on one hand, the deep rock mass rockburst dynamic disaster simulation device comprises a front loader, a rear loader, a left loader, a right loader, an upper loader and a lower loader, wherein the front loader is located on the front side of a rock simulation sample, the rear loader is located on the rear side of the rock simulation sample, the left loader is located on the left side of the rock simulation sample, the right loader is located on the right side of the rock simulation sample, the upper loader is located above the rock simulation sample, and the lower loader is located below the rock simulation sample.
Preferably, the front loader comprises a front hydraulic jack and a front bearing end, the front hydraulic jack is fixedly connected with the front bearing end, and the front bearing end faces the rock simulation sample; the rear loader comprises a rear hydraulic jack and a rear bearing end, the rear hydraulic jack is fixedly connected with the rear bearing end, and the rear bearing end faces the rock simulation sample; the left loader comprises a left hydraulic jack and a left bearing end, the left hydraulic jack is fixedly connected with the left bearing end, and the left bearing end faces the rock simulation sample; the right loader comprises a right hydraulic jack and a right bearing end, the right hydraulic jack is fixedly connected with the right bearing end, and the right bearing end faces the rock simulation sample; the lower loader comprises a lower hydraulic jack, a lower bearing end and a bottom fixed end, the lower hydraulic jack is fixedly connected with the lower bearing end, the lower bearing end faces the rock simulation sample, and the bottom fixed end is fixedly connected with the lower hydraulic jack.
Preferably, the front bearing end, the rear bearing end, the left bearing end, the right bearing end and the lower bearing end are respectively provided with an acoustic emission transmission line hole.
Preferably, the lower bearing end of the lower loader is matched with the bottom end of the rock simulation sample.
Preferably, the upper loader comprises a waveform emitter, a connecting rod, a spring, an upper bearing end, an upper hydraulic jack and a pressure transmission ring, the waveform emitter is fixedly connected with the top end of the connecting rod, the bottom end of the connecting rod is fixedly connected with the upper bearing end, the annular fixing table is sleeved on the upper bearing end, and the bottom surface of the upper bearing end faces the rock simulation sample; the spring is sleeved on the connecting rod, one end of the spring is abutted against the upper bearing end, and the other end of the spring is abutted against the pressure transmission ring; the upper hydraulic jack is fixedly connected with the pressure transmission ring; the upper bearing end is provided with an acoustic emission transmission line hole.
On the other hand, the embodiment of the invention also provides a testing method for deep rock mass rockburst dynamic disasters, which comprises the following steps:
s10 installing a lower loader: firstly, fixing a bottom fixing end on a cement ground by using a fixing nut, then installing an acoustic emission probe on a rock simulation sample through an acoustic emission transmission line hole at a lower bearing end of a lower loader, matching a convex part of the acoustic emission probe with a concave part of the acoustic emission transmission line hole, and fixing a lower hydraulic jack on the bottom fixing end through the fixing nut;
s20, applying load to the rock simulation sample: after the acoustic emission probe is arranged on the rock simulation sample, the rock simulation sample is placed on the lower bearing end 11 of the lower loader; outputting six wires connected with the acoustic emission probe through acoustic emission transmission wire holes on a front loader, a rear loader, a left loader, a right loader, an upper loader and a lower loader respectively, and connecting the six wires with an external acoustic emission signal receiving end; then, a preset vertical pressure is applied to the rock simulation sample through the lower loader, and in the process that the lower loader moves upwards, the rock simulation sample interacts with the upper bearing end at the lower loader to generate vertical pressure; after the vertical pressure load is stable, applying a lateral pressure load to the rock simulation sample through the left loader and the right loader; after the applied lateral pressure load is stable, applying a horizontal axial pressure load to the rock simulation sample by using a front loader and a rear loader;
s30 debugging pressure load: debugging the lower loader, the front loader, the rear loader, the left loader and the right loader in different loading directions to enable pressure gauges of the lower loader, the front loader, the rear loader, the left loader and the right loader to respectively reach preset values;
s40 test: the method comprises the following steps of: the unloading speed of the hydraulic pressure in the front loader is controlled to unload the rock simulation sample, and in the process of unloading the load, an acoustic emission signal receiving end is used for recording an acoustic emission signal generated by the damage of the rock simulation sample.
Preferably, the S40 further comprises adjusting the energy supply rate: the upper bearing end is loaded again by adjusting the rigidity of the spring and the loading rate of the upper hydraulic jack, the upper hydraulic jack transmits the load to the rock simulation sample through the pressure transmission ring, the spring and the upper bearing end in sequence, and the acoustic emission law generated when the interior of the rock simulation sample is damaged at different rigidities and different loading rates is analyzed through signals received by the acoustic emission signal receiving end so as to analyze the influence of the energy supply rate on the rock dynamic disaster.
Preferably, the S40 further includes a dynamic disturbance test: the method comprises the steps that waves with different frequencies, different waveforms and different amplitudes are generated through a waveform emitter, dynamic disturbance loads are applied to a rock simulation sample through a connecting rod, the law of acoustic emission signals generated when the interior of the rock simulation sample is damaged is obtained through received acoustic emission signals, and therefore the influences of the loading frequencies, the amplitudes and the waveforms of the waves on dynamic disasters are obtained.
Compared with the prior art, the embodiment of the invention provides the simulation device and the test method for the deep rock mass rockburst dynamic disaster, which can simulate the deep rock mass rockburst state, acquire more accurate data and reduce the occurrence of the dynamic disaster. According to the embodiment of the invention, the simulation of the deep rock mass rockburst dynamic disaster is realized by arranging the front loader, the rear loader, the left loader, the right loader, the upper loader and the lower loader, and the related data is obtained. The loaders are provided with acoustic emission transmission holes, the acoustic emission probes are installed behind the rock simulation samples in different directions, and connecting wires of the acoustic emission probes are connected with an acoustic emission signal receiving end after being output through the acoustic emission transmission holes of the loaders in different directions, so that acoustic emission signal propagation rule data of the rock simulation samples in all directions are obtained. According to the acoustic emission signal rule data, the deep rock mass is researched by acquiring the deep rock mass rockburst dynamic disaster related data.
Drawings
FIG. 1 is a front view of a simulation apparatus according to an embodiment of the present invention;
FIG. 2 is a left side view of a simulation device of an embodiment of the present invention;
fig. 3 is a schematic diagram of the positions of a rock simulation sample and a loader in the simulation apparatus according to an embodiment of the present invention.
The figure shows that: the device comprises a waveform emitter 1, a connecting rod 2, an upper loader 3, a spring 4, an upper bearing end 5, a left loader 6, a left hydraulic jack 7, a left bearing end 8, an acoustic emission transmission line hole 9, a right loader 10, a lower loader 11, a fixing nut 12, a bottom fixing end 13, a front loader 14, a rear loader 15, a rock simulation sample 16, an annular fixing table 17, an upper hydraulic jack 18 and a pressure transmission ring 19.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the simulation apparatus for deep rock mass rockburst dynamic disaster according to the embodiment of the present invention includes a front loader 14, a rear loader 15, a left loader 6, a right loader 10, an upper loader 3, and a lower loader 11. The front loader is located at the front side of the rock simulation sample 16, the rear loader is located at the rear side of the rock simulation sample 16, the left loader is located at the left side of the rock simulation sample 16, the right loader is located at the right side of the rock simulation sample 16, the upper loader is located above the rock simulation sample 16, and the lower loader is located below the rock simulation sample 16.
In the above embodiment, the simulation of deep rock mass rockburst dynamic disasters is realized by arranging the front loader 14, the rear loader 15, the left loader 6, the right loader 10, the upper loader and the lower loader, and relevant data is obtained. The loaders are provided with acoustic emission transmission holes 9, the acoustic emission probes are installed behind the rock simulation sample 16 in different directions, and connecting wires of the acoustic emission probes are connected with an acoustic emission signal receiving end after being output through the acoustic emission transmission holes 9 of the loaders in different directions, so that acoustic emission signal propagation rule data of the rock simulation sample 16 in all directions are obtained. According to the acoustic emission signal rule data, the deep rock mass is researched by acquiring the deep rock mass rockburst dynamic disaster related data. The deep rock mass is under the action of ground stress, and the applied confining pressure is used for simulating the ground stress condition of the deep rock mass.
Preferably, as shown in fig. 1, the front loader 14 comprises a front hydraulic jack and a front load-bearing end, the front hydraulic jack and the front load-bearing end being fixedly connected, and the front load-bearing end facing the rock simulation specimen 16. The rear loader 15 comprises a rear hydraulic jack and a rear bearing end, the rear hydraulic jack is fixedly connected with the rear bearing end, and the rear bearing end faces the rock simulation sample 16. The left loader 6 comprises a left hydraulic jack 7 and a left bearing end 8, the left hydraulic jack 7 is fixedly connected with the left bearing end 8, and the left bearing end 8 faces the rock simulation sample 16. The right loader 10 comprises a right hydraulic jack and a right bearing end, the right hydraulic jack and the right bearing end are fixedly connected, and the right bearing end faces the rock simulation sample 16. The lower loader 11 comprises a lower hydraulic jack, a lower bearing end and a bottom fixed end 13, wherein the lower hydraulic jack is fixedly connected with the lower bearing end, and the lower bearing end faces the rock simulation sample 16. The bottom fixed end 13 is fixedly connected with the lower hydraulic jack. And the loader in each direction applies acting force through the hydraulic jack. The bottom fixing end 13 is provided in the lower loader 11 to stabilize the lower loader, so as to facilitate the test and obtain accurate data. And the front bearing end, the rear bearing end, the left bearing end, the right bearing end and the lower bearing end are respectively provided with an acoustic emission transmission line hole 9. And the data obtained by the acoustic emission probe is output to an acoustic emission signal receiving end through the acoustic emission transmission hole 9.
The lower loader 11 is attached to the bottom fixing end 13 by a fixing nut 12. The bottom fixing end 13 is used for fixing the lower loader 11, so that the position of the lower loader 11 is more stable, and the influence of shaking of the lower loader 11 on the accuracy of data acquisition in the working process is avoided. A rock simulation sample 16 is placed on the lower load end of the lower loader 11. And (3) passing a data transmission line of the acoustic emission probe on the rock simulation sample 16 through the acoustic emission transmission line hole 9, connecting the data transmission line to an acoustic emission signal receiving end, and acquiring acoustic emission signals generated in different directions in the rock destruction process.
The front bearing end, the rear bearing end, the left bearing end, the right bearing end, the upper bearing end and the right bearing end are respectively provided with an acoustic emission transmission line hole 9. The acoustic emission probe is mounted on a rock simulation specimen 16. And respectively enabling data transmission lines of the acoustic emission probes in different directions to pass through the acoustic emission transmission line holes 9 of the front bearing end, the rear bearing end, the left bearing end, the right bearing end, the upper bearing end and the right bearing end, and connecting the data transmission lines to an acoustic emission signal receiving end to acquire acoustic emission signal data generated in the rock destruction process in different directions. The front loader 14 is taken as an example to explain the working process of the loader, and the working process of the rear loader 15, the left loader 6 and the right loader 10 is the same, but the directions are different. The front loader 14 comprises a front hydraulic jack and a front carrying end, to which pressure is applied by means of the front hydraulic jack. The front load bearing end transmits pressure to the front side of the rock simulation specimen 16, and the rock simulation specimen 16 is subjected to a load from the front. The load applied by the front hydraulic jack can be adjusted according to the requirement.
Preferably, the lower bearing end of the lower loader 11 is adapted to the bottom end of the rock simulation specimen 16. The top surface of the lower bearing end 11 is as large as the bottom surface of the rock simulation specimen 16, otherwise the bottom part is often hit during the loading process of the left loader and the right loader, causing wear of the instrument.
Preferably, as shown in fig. 1 and 2, the upper loader 3 includes a wave emitter 1, a connecting rod 2, a spring 4, an upper bearing end 5, an annular fixing table 17, an upper hydraulic jack 18, and a pressure transmission ring 19. Wave form emitter 1 and connecting rod 2's top fixed connection, connecting rod 2 bottom with last bear end 5 fixed connection, annular fixed station 17 cover bears on the end 5 on, the bottom surface of going up to bear end 5 towards rock simulation sample 16. The spring 4 is sleeved on the connecting rod 2, one end of the spring 4 is propped against the pressure transmission ring 19, and the other end of the spring 4 is propped against the upper bearing end 5; the pressure transmission ring 19 is fixedly connected with the upper hydraulic jack 18; the annular fixed table 17 is sleeved on the lower bearing end 5; the upper hydraulic jack 18 is fixedly connected with the pressure transmission ring 19, and the upper bearing end 5 is provided with a sound emission transmission line hole 9. The annular fixing table 17 plays a role of fixing. The annular fixed table 17 is fixedly connected with an external fixture. The position of the annular fixed table 17 is not changed during the operation of the upper loader. The upper bearing end 5 can only move downwards but not move upwards under the action of the annular fixed table 17, so that the rock simulation sample 16 reaches the preset vertical stress under the action of the lower loader and the upper bearing end in the upward moving process of the lower loader. The wave transmitter 1 is located the top of connecting rod 2, through the wave of wave transmitter 1 transmission different frequency, wave amplitude and wave form, applys dynamic disturbance load to rock simulation sample 16 through connecting rod 2, acquires the acoustic emission law of acoustic emission probe at rock simulation sample 16 test through the acoustic emission signal receiving terminal, and then the influence of the loading frequency of analysis wave, wave amplitude and wave form to the dynamic disaster. The upper hydraulic jack 19 applies a downward load to the spring 4 through the pressure transfer ring 18, the spring 4 transfers the load to the upper bearing end 5, and the upper bearing end 5 applies a downward load to the rock simulation sample 16. By changing the load applied to the spring 4 by the upper hydraulic jack 19 and the loading rate, the acoustic emission rule generated by the rock simulation sample 16 is obtained by the acoustic emission probe, and then the influence of different energy supply rates on the rock dynamic disaster is analyzed.
The upper loader 3 is used to provide a pressure load in the vertical direction. The rigidity of the spring 4 can be changed, different energy supply rates are provided under the action of the upper loader 3, so that the rock mass energy supply rates with different rigidities can be simulated, and the influence of the energy supply rates on the dynamic disaster of the rock burst can be analyzed. The pressure transmission ring 18 has a hollow structure in the middle. The connecting rod 2 and the pressure transmission ring 18 are coaxial. The upper part of the connecting rod 2 is located in the hollow cavity of the pressure transmission ring 18. The wave emitter 1 and the upper carrier end 5 are connected by a connecting rod 2. At this time, the connecting rod 2 also serves to stabilize the loading direction of the upper hydraulic jack 18, so that the upper hydraulic jack 18 loads the spring 4 in the vertical direction. In addition, the waveform emitter 1 is connected on the connecting rod 2, and the waveform emitter 1 can excite waves with different shapes, amplitudes and frequencies, and then the waves are transmitted to the rock simulation sample 16 sequentially through the connecting rod 2 and the upper bearing end 5, so that a power disturbance load is provided for the rock simulation sample 16, and the influence of the power disturbance on the rock explosion power disaster is analyzed.
The method for testing the deep rock mass rockburst dynamic disaster by using the simulation device comprises the following steps:
step S10 installs the loader down: firstly, fixing the bottom fixing end 13 on the cement ground by using a fixing nut 12, then installing the acoustic emission probe on the rock simulation sample 16 through the acoustic emission transmission line hole 9 at the lower bearing end of the lower loader 11, and then outputting the convex part of the acoustic emission probe through the acoustic emission transmission line hole 9. The convex part of the acoustic emission probe installed on the rock simulation sample is matched with the concave part of the acoustic emission transmission line hole 9, and the lower hydraulic jack is fixed on the bottom fixing end 13 through the fixing nut 12.
Step S20 applies a load to the rock simulation sample: after the acoustic emission probe is installed on the rock simulation sample 16, placing the rock simulation sample 16 on the lower bearing end 11 of the lower loader 11; outputting six lines connected with the acoustic emission probe through acoustic emission transmission line holes 9 on a front loader 14, a rear loader 15, a left loader 6, a right loader 10, an upper loader 3 and a lower loader 11 respectively, and connecting the six lines with an external acoustic emission signal receiving terminal; a preset vertical pressure is then applied to the rock simulation specimen 16 by the lower loader 11. Due to the interaction of the upper bearing end 5 and the annular fixed table 17, the rock simulation specimen 16 can only move downwards and not upwards. During the upward movement of the lower loader 11, the rock simulation specimen 16 generates a vertical pressure when the lower loader 11 interacts with the upper load-bearing end 5. After the vertical pressure load is stable, applying a lateral pressure load to the rock simulation sample 16 through the left loader 6 and the right loader 10; after the applied lateral pressure load is stable, applying a horizontal axial pressure load to the rock simulation sample 16 by using the front loader 14 and the rear loader 15;
s30 debugging pressure load: and debugging the front loader 14, the rear loader 15, the left loader 6, the right loader 10 and the lower loader 11 in different loading directions to ensure that pressure gauges of the front loader 14, the rear loader 15, the left loader 6, the right loader 10 and the lower loader 11 respectively reach preset values.
S40 test: the method comprises the following steps of: the unloading speed of the hydraulic pressure in the front loader 14 is controlled to unload the rock simulation sample 16, and in the process of unloading, an acoustic emission signal generated by the damage of the rock simulation sample 16 is received and obtained by an acoustic emission signal receiving end.
Preferably, the S40 further comprises adjusting the energy supply rate: the upper bearing end 5 is loaded again by adjusting the rigidity of the spring 4 and the loading rate of the upper hydraulic jack 18, the upper hydraulic jack 18 transmits the load to the rock simulation sample 16 through the pressure transmission ring 19, the spring 4 and the upper bearing end 5 in sequence, and the internal damage rule of the rock simulation sample 16 is analyzed by receiving the obtained signal at the acoustic emission signal receiving end when different rigidities and different loading rates are achieved, so that the influence of the energy supply rate on the rock dynamic disaster is analyzed. The method of adjusting the stiffness of the spring 4 is to use springs of different stiffness during the loading process. The method of adjusting the loading rate of the spring loader 3 is to control the loading rate by controlling the oil pressure loading speed inside the upper hydraulic jack 18.
Preferably, the S40 further includes a dynamic disturbance test: the wave transmitter 1 is used for generating waves with different frequencies, different waveforms and different amplitudes, the waves apply dynamic disturbance loads to the rock simulation sample 16 through the connecting rod 2, and the influences of the loading frequencies, the amplitudes and the waveforms of the waves on dynamic disasters are analyzed. And acquiring the law of the acoustic emission signal generated when the interior of the rock simulation sample 16 is damaged through the received acoustic emission signal so as to obtain the influence of the loading frequency, amplitude and waveform of the wave on the dynamic disaster.
The simulation device of the above embodiment can load pressure loads with different lateral pressure coefficients for the rock simulation sample 16, and specifically, the rock simulation sample 16 is loaded with pressure loads with different lateral pressure coefficients by the front loader 14, the rear loader 15, the left loader 6, the right loader 10 and the lower loader 11. The simulation device of this embodiment can also realize exerting the disturbance load to the uninstallation of rock simulation material sample, the inside energy migration speed of control rock mass. The simulation device of this embodiment tests the acoustic emission rule of rock mass internal destruction through the acoustic emission probe.
The simulation device and the test method of the embodiment simulate the rigidity change and the deformation rate of a rock body through the rigidity change of the spring positioned at the upper part and the adjustment of the loading rate of the upper hydraulic jack, change the energy supply rate of the rock simulation sample 16 below, and analyze the influence of the energy transfer rate on the rock burst.
Claims (2)
1. A testing method for deep rock mass rockburst dynamic disasters is characterized by comprising the following steps:
s10 installing a lower loader: firstly, fixing a bottom fixing end (13) on a cement ground by using a fixing nut (12), then installing an acoustic emission probe on a rock simulation sample (16) through an acoustic emission transmission line hole (9) at a lower bearing end of a lower loader (11), matching a convex part of the acoustic emission probe with a concave part of the acoustic emission transmission line hole (9), and fixing a lower hydraulic jack on the bottom fixing end (13) through the fixing nut (12);
s20, applying load to the rock simulation sample: after the acoustic emission probe is arranged on the rock simulation sample (16), the rock simulation sample (16) is placed on the lower bearing end of the lower loader (11); six wires connected with the acoustic emission probe are respectively output through acoustic emission transmission wire holes (9) on a front loader (14), a rear loader (15), a left loader (6), a right loader (10), an upper loader (3) and a lower loader (11) and are connected with an external acoustic emission signal receiving end; then, a preset vertical pressure is applied to the rock simulation sample (16) through the lower loader (11), the lower loader (11) moves upwards, and the rock simulation sample (16) interacts with the upper bearing end (5) in the lower loader (11) to generate vertical pressure; after the vertical pressure load is stable, applying a lateral pressure load to the rock simulation sample (16) through the left loader (6) and the right loader (10); after the applied lateral pressure load is stable, a front loader (14) and a rear loader (15) are utilized to apply horizontal axial pressure load to the rock simulation sample (16);
s30 debugging pressure load: debugging the lower loader (11), the front loader (14), the rear loader (15), the left loader (6) and the right loader (10) in different loading directions to enable pressure gauges of the lower loader (11), the front loader (14), the rear loader (15), the left loader (6) and the right loader (10) to respectively reach preset values;
s40 test: the method comprises the following steps of: unloading load of the rock simulation sample (16) is carried out by controlling the hydraulic unloading speed in the front loader (14), and an acoustic emission signal generated by the damage of the rock simulation sample (16) is recorded by an acoustic emission signal receiving end in the process of unloading load;
regulating the energy supply rate: the upper bearing end (5) is loaded again by adjusting the rigidity of the spring (4) and the loading rate of the upper hydraulic jack (18), the upper hydraulic jack (18) sequentially transmits the load to the rock simulation sample (16) through the pressure transmission ring (19), the spring (4) and the upper bearing end (5), and the acoustic emission rule generated when the interior of the rock simulation sample (16) is damaged at different rigidities and different loading rates is analyzed through signals received by an acoustic emission signal receiving end so as to analyze the influence of the energy supply rate on the rock dynamic disaster;
and (3) dynamic disturbance testing: the wave transmitter is characterized in that the wave transmitter (1) is used for generating waves with different frequencies, different waveforms and different amplitudes, the waves apply dynamic disturbance loads to the rock simulation sample (16) through the connecting rod (2), the acoustic emission signal rule generated when the interior of the rock simulation sample (16) is damaged is obtained through received acoustic emission signals, and the influence of the loading frequencies, the amplitudes and the waveforms of the waves on dynamic disasters is obtained.
2. The deep rock mass rockburst dynamic disaster testing method according to claim 1, wherein the upper loader (3) comprises a waveform emitter (1), a connecting rod (2), a spring (4), an upper bearing end (5), an upper hydraulic jack (18) and a pressure transmission ring (19), the waveform emitter (1) is fixedly connected with the top end of the connecting rod (2), the bottom end of the connecting rod (2) is fixedly connected with the upper bearing end (5), an annular fixing platform (17) is sleeved on the upper bearing end (5), and the bottom surface of the upper bearing end (5) faces the rock simulation sample (16); the spring (4) is sleeved on the connecting rod (2), one end of the spring (4) is propped against the upper bearing end (5), and the other end of the spring (4) is propped against the pressure transmission ring (19); the upper hydraulic jack (18) is fixedly connected with the pressure transmission ring (19); the upper bearing end (5) is provided with an acoustic emission transmission line hole (9).
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| JP7236187B1 (en) | 2023-03-09 |
| JP2023066398A (en) | 2023-05-15 |
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