Deep rock mass microwave presplitting blasting cooperative rock breaking test system and test method

Abstract

The invention provides a deep rock mass microwave presplitting blasting collaborative rock breaking test system. The deep rock mass microwave presplitting blasting collaborative rock breaking test system comprises a test box, a microwave irradiation device, a confining pressure loading device, a high-pressure gas blasting device and an infrared thermal imaging temperature measuring device. The method comprises the following steps: in a test process, firstly, carrying out presplitting treatment on a selected rock mass area by utilizing microwave energy to form a preliminary crack network; then, blasting operation is combined, and the impact force generated by blasting and the microwave presplitting effect are used for achieving the synergistic effect, so that cracks are further expanded, and rock mass fragmentation is promoted. According to the method, the crushing efficiency of the deep rock mass is improved, the use amount of explosives is effectively reduced, and disturbance to the surrounding environment is reduced. The system and the test method provide an innovative technical solution for the fields of deep resource mining, underground engineering and the like, and have important application value and prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of rock mechanics and engineering test equipment, and in particular relates to a deep rock mass microwave pre-splitting blasting coordinated rock breaking test system and test method. Background Art

[0002] With the increasing global demand for deep resource mining, such as oil, natural gas, and metal minerals, deep rock mining technology has become an important research field. However, deep rock is in a high stress state and is often accompanied by complex geological conditions such as high temperature, high pressure, and high osmotic pressure, making traditional rock crushing methods inefficient and costly. Therefore, there is an urgent need to develop new rock breaking technologies to improve the efficiency and safety of deep resource mining.

[0003] As an emerging technical means, microwave-assisted rock breaking technology has received widespread attention in recent years. Microwaves have the characteristics of strong penetration, fast heating speed, and no need for medium to transfer heat. They can quickly change the physical and mechanical properties of rocks and reduce rock strength, thereby achieving efficient rock breaking. In addition, microwave-assisted rock breaking technology also has the advantages of environmental protection and no pollution, which meets the development requirements of modern green mining.

[0004] However, the research on microwave-assisted rock breaking technology is still in its infancy. The main problem with microwave irradiation rock tests is that they cannot accurately simulate the microwave pre-cracking and blasting effects under deep surrounding rock pressure environments, and it is difficult to effectively reflect the synergistic mechanism between microwaves and blasting, which limits the application and development of microwave-assisted rock breaking technology in deep resource exploitation. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a deep rock microwave pre-splitting blasting coordinated rock breaking test system and test method in view of the above-mentioned deficiencies in the prior art. The test system integrates a deep rock microwave and blasting coordinated rock breaking device with pre-confining pressure of microwave irradiation, high-pressure gas blasting and confining pressure loading functions, which can accurately simulate the microwave pre-splitting and blasting effects under the deep surrounding rock pressure environment, and can effectively reflect the synergistic mechanism between microwave and blasting.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a deep rock mass microwave pre-splitting blasting coordinated rock breaking test system, including a test box, a microwave irradiation device, a confining pressure loading device, a high-pressure gas blasting device and an infrared thermal imaging temperature measuring device;

[0007] A plurality of microwave irradiation devices are arranged in the test box, a confining pressure loading device is arranged at the lower part of the test box, the high-pressure gas blasting device is connected to the test box, and an infrared thermal imaging temperature measuring device is arranged at one side of the test box.

[0008] Preferably, a sealed door is provided on the front of the test box, a transparent observation window is provided on the sealed door, and a side wall of the test box is a movable cover.

[0009] Preferably, the microwave irradiation device comprises a magnetron, the magnetron is connected to the microwave transmitter via a waveguide, the lower end of the magnetron is connected to a water cooling system, and a microwave controller and a microwave protector are provided on the waveguide.

[0010] Preferably, the confining pressure loading device includes a rock sample box, and pressure plates are arranged on the outside of the four side walls of the rock sample box, each of the pressure plates is provided with a pressure sensor and a loading control system, one end of each of the pressure plates is provided with a cooling system, the upper end of each of the pressure plates is provided with a sliding rod, each of the cooling systems is provided with a pressure control valve, and one end of each of the cooling systems is provided with a hydraulic pump.

[0011] Preferably, the high-pressure gas blasting device comprises a compressed gas bottle, the upper end of which is connected in sequence to a gas boosting pump, a gas pressure regulating valve and a high-pressure autoclave through pipelines, a stress sensor is provided on the outer wall of the high-pressure autoclave, and the outside of the high-pressure autoclave is covered with a safety protection cover; a one-way valve is provided between the gas booster pump and the compressed gas bottle.

[0012] Preferably, the infrared thermal imaging temperature measuring device includes a base, a plurality of fixing frames are arranged on the surface of the base, a slide groove is fixedly connected to the plurality of fixing frames, a slide rod is passed through the slide groove, an infrared temperature measuring detector is arranged on the slide groove, and a display screen is arranged on the surface of the infrared temperature measuring detector.

[0013] The present invention also provides a test method using the above-mentioned deep rock mass microwave pre-splitting blasting coordinated rock breaking test system, comprising the following steps:

[0014] S1. System assembly and presetting: Assemble the test box, microwave irradiation device, confining pressure loading device, high-pressure gas blasting device and infrared thermal imaging temperature measuring device. During the assembly process, aim the microwave emitter of the microwave irradiation device at the rock sample in the test box, the pressure plate of the confining pressure loading device can stably transmit the confining pressure to the rock sample box, and the high-pressure autoclave of the high-pressure gas blasting device is safely and reliably connected to the test box; at the same time, adjust the space layout inside the test box and the parameter settings of the microwave irradiation device and the high-pressure gas blasting device according to the specific needs of the test;

[0015] S2. rock sample preparation and installation: processing the rock sample into a required shape and size according to the test requirements, placing it in the rock sample box, and then installing the rock sample box on the pressure plate of the confining pressure loading device;

[0016] S3, confining pressure loading and microwave irradiation: open the cover plate on the side of the test box, push the infrared thermal imaging temperature measuring device to the transparent observation window in the test box and seal it, start the confining pressure loading device, provide a pressure source through the hydraulic pump, and the pressure control valve accurately adjusts the confining pressure applied to the rock sample; at the same time, turn on the microwave irradiation device, the magnetron generates microwaves, and transmits microwave energy to the rock sample through the waveguide and the microwave transmitter; the infrared thermal imaging temperature measuring device monitors the temperature distribution of various parts of the rock sample in real time;

[0017] S4, high-pressure gas blasting simulation: turn off the microwave irradiation device, and push the infrared thermal imaging temperature measuring device out of the test box. After the rock sample cools to a certain temperature, start the high-pressure gas blasting device, the compressed gas bottle releases high-pressure gas, and the gas pressure is increased by the gas booster pump. The gas pressure regulating valve accurately adjusts the pressure of the gas before blasting. The high-pressure gas enters the high-pressure autoclave, and the rock sample is subjected to a blasting simulation test. The stress sensor is used to monitor the stress change of the rock sample, and the safety protection cover protects the operator from injury;

[0018] S5. Data recording and analysis: Collect and record various data during the test, including confining pressure, microwave irradiation parameters, blasting pressure, rock sample temperature changes, and stress changes; then process and analyze the collected data to evaluate the effect of synergistic rock breaking by microwave and blasting, as well as the influence of different parameters on the rock breaking effect.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The test system of the present invention integrates multiple functions such as microwave irradiation, confining pressure loading, high-pressure gas blasting and infrared thermal imaging temperature measurement, and can simultaneously meet multiple test requirements such as microwave irradiation, confining pressure loading and blasting simulation, providing strong technical support for the study of rock breaking mechanism of deep rock masses, and realizing comprehensive simulation and research on the coordinated rock breaking mechanism of microwave and blasting in deep rock masses.

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the deep rock mass microwave pre-splitting blasting coordinated rock breaking test system of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the test box and the infrared thermal imaging temperature measuring device in the present invention.

[0024] Figure 3 It is a structural schematic diagram of the test box in the present invention.

[0025] Figure 4 It is a schematic structural diagram of the microwave irradiation device in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the confining pressure loading device in the present invention.

[0027] Figure 6 It is a structural schematic diagram of the high-pressure gas blasting device in the present invention.

[0028] Figure 7 It is a structural schematic diagram of the mid-infrared thermal imaging temperature measuring device of the present invention.

[0029] Figure 8 This is a schematic diagram of the direct microwave irradiation test scheme without loading confining pressure.

[0030] Fig. 9 It is a schematic diagram of the test plan of loading confining pressure and using microwave irradiation device to carry out local irradiation test on the blast hole.

[0031] Fig.10 It is a schematic diagram of a test scheme for simulating explosion using a high-pressure gas explosion device.

[0032] In the figure: 1. test box; 12. sealed door; 11. transparent observation window; 2. microwave irradiation device; 21. magnetron; 22. waveguide; 23. microwave transmitter; 24. microwave controller; 25. microwave protector; 26. water cooling system; 3. confining pressure loading device; 31. slide bar; 32. hydraulic pump; 33. pressure control valve; 34. rock sample box; 35. pressure sensor; 36. pressure plate; 37. cooling system; 38. loading control system; 4. high-pressure gas blasting device; 41. compressed gas bottle; 42. gas increasing pump; 43. air pressure regulating valve; 44. stress sensor; 45. high-pressure autoclave; 46. safety protection cover; 5. infrared thermal imaging temperature measuring device; 51. base; 52. fixing bracket; 53. infrared temperature detector; 54. slide; 55. display screen. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] This embodiment provides a deep rock mass microwave pre-splitting blasting collaborative rock breaking test system. Figure 1-7As shown, it includes a test box 1, a microwave irradiation device 2, a confining pressure loading device 3, a high-pressure gas blasting device 4 and an infrared thermal imaging temperature measuring device 5;

[0036] Four microwave irradiation devices 2 are arranged in the test box 1, a confining pressure loading device 3 is arranged on the lower surface of the test box 1, a high-pressure gas blasting device 4 is connected to the test box 1, and an infrared thermal imaging temperature measuring device 5 is arranged on one side outside the test box 1;

[0037] The front of the test box 1 is provided with a sealed door 12, and the sealed door 12 is provided with a transparent observation window 11; as the core component of the entire device, the test box 1 has multiple functions such as anti-microwave leakage, anti-vibration, thermal insulation, etc. to ensure the safety and accuracy of the test process; the internal space of the test box 1 is spacious and can accommodate rock samples of various sizes for testing;

[0038] Each microwave irradiation device 2 includes a magnetron 21, which is connected to a microwave transmitter 23 through a waveguide 22. The lower end of the magnetron 21 is connected to a water cooling system 26. A microwave controller 24 and a microwave protector 25 are provided on the waveguide 22. The emission power range of each microwave irradiation device 2 is 0-3kW, which can provide 0-12kW microwave irradiation for the test. The microwave irradiation device 2 can adjust the emission power according to the test needs to achieve accurate microwave irradiation of the rock sample. The magnetron 21 is used to generate microwave energy, and the microwave transmitting device 2 transmits the microwave energy to the rock sample through the waveguide 22 and the microwave transmitter 23. The microwave transmitter 23 is designed as an antenna array with adjustable direction, so as to adjust the microwave irradiation angle and intensity according to the test requirements; the microwave controller 24 is responsible for controlling the microwave emission parameters, such as power, frequency and irradiation time; the microwave protector 25 is used to protect the microwave irradiation device 2 from damage during the microwave irradiation process, and the water cooling system 26 is used to reduce the working temperature of the microwave equipment to ensure the stable operation of the equipment; the various components of the microwave irradiation device 2 work together to achieve accurate microwave irradiation of the rock sample, providing key technical support for the deep rock mass microwave and blasting collaborative rock breaking test;

[0039] The confining pressure loading device 3 includes a rock sample box 34, and pressure plates 36 are arranged outside the four side walls of the front, back, left and right of the rock sample box 34. Each pressure plate 36 is provided with a pressure sensor 35 and a loading control system 38, and one end of each pressure plate 36 is provided with a cooling system 37. A sliding rod 31 is provided at the upper end of each pressure plate 36, and a pressure control valve 33 is provided on each cooling system 37. A hydraulic pump 32 is provided at one end of each cooling system 37; the confining pressure loading device 3 applies controllable confining pressure to the rock sample through the loading control system 38; the confining pressure loading method is to pressurize the rock sample through the pressure plates 36 in four horizontal directions at the same time, the hydraulic pump 32 provides a pressure source, and the pressure control valve 33 is used to accurately adjust the size of the confining pressure applied to the rock sample; the rock sample box 34 is designed to be a specific shape and size for proper The test rock sample is accommodated and fixed; the pressure sensor 35 monitors the confining pressure value applied to the rock sample in real time; the pressure plate 36 is detachable, which is convenient for replacement according to different rock sample sizes. The pressure plate 36 evenly transmits the confining pressure to the rock sample box 34 to ensure that the rock sample is in a stable stress state during the test. The cooling system 37 is used to cool the hydraulic oil and keep the hydraulic system running stably; the loading control system 38 is the center of the entire confining pressure loading device 3, integrating a closed-loop control strategy, and adjusting the output of the hydraulic pump 32 in real time according to the feedback of the pressure sensor 35 to maintain the preset confining pressure value; in addition, the various components of the confining pressure loading device 3 are precisely assembled and debugged to ensure stability and safety during the test, providing a reliable test platform for in-depth research on the rock breaking mechanism of deep rock mass under the synergistic effect of microwave and blasting;

[0040] The high-pressure gas blasting device 4 comprises a compressed gas bottle 41, the upper end of which is connected to a gas booster pump 42, a gas pressure regulating valve 43 and a high-pressure autoclave 45 in sequence through pipelines, a stress sensor 44 is arranged on the outer wall of the high-pressure autoclave 45, and the outside of the high-pressure autoclave 45 is covered with a safety protection cover 46; the high-pressure gas blasting device 4 is used to perform a blasting simulation test on a rock sample after microwave irradiation, the compressed gas bottle 41 stores high-pressure gas, the gas booster pump 42 is used to increase the gas pressure when needed, and the gas pressure regulating valve 43 is used to accurately adjust the pressure of the gas before blasting; the stress sensor 44 is used to monitor Measure the stress change of the rock sample during the blasting process; the high-pressure autoclave 45 is equipped with a safety valve to ensure that the pressure can be released in time when the pressure exceeds the set value during the experiment to prevent equipment damage or injury to the experimenter; the safety protection cover 46 is used to protect the operator from injury during the blasting process; the one-way valve is set between the gas booster pump 42 and the compressed gas bottle 41 to prevent gas backflow and ensure the safe operation of the blasting device; the various components of the high-pressure gas blasting device 4 are closely matched through pipes and connectors to form a complete high-pressure gas blasting system, which can realize efficient and accurate blasting simulation tests on rock samples;

[0041] The infrared thermal imaging temperature measuring device 5 comprises a base 51, on the surface of which two fixing frames 52 are provided, and the two fixing frames 52 are fixedly connected with a slide 54, on which an infrared temperature measuring detector 53 is provided, and on the surface of the infrared temperature measuring detector 53 a display screen 55 is provided; the infrared thermal imaging temperature measuring device 5 is used for non-contact measurement of the temperature distribution of various parts of the rock sample; the base 51 is a stable supporting structure, and the fixing frame 52 is vertically installed on the base 51 for fixing and supporting the temperature measuring component, and the infrared temperature measuring detector 53 has high sensitivity and can accurately measure the temperature of the surface of the rock sample; the slide 54 allows the infrared temperature measuring detector 53 to adjust its position within a fixed range to adapt to rock samples of different sizes and temperature measurement requirements; the display screen 55 is used to display and record in real time the temperature distribution of various parts of the rock sample after microwave radiation and blasting; the entire infrared thermal imaging temperature measuring device 5 is exquisitely designed, and the infrared temperature measuring detector 53 can flexibly adjust the temperature measuring position through the slide 54, and combined with the real-time display of the display screen 55, a non-contact and high-precision measurement of the temperature distribution of the rock sample is realized;

[0042] The use process of the deep rock mass microwave pre-splitting blasting coordinated rock breaking test system in this embodiment is as follows: assemble the test box 1, microwave irradiation device 2, confining pressure loading device 3, high-pressure gas blasting device 4 and infrared thermal imaging temperature measuring device 5 to form a complete test system; process the rock material to be tested into a rock sample of the required shape and size, and place it in the rock sample box 34, and install the rock sample box 34 on the pressure plate 36 of the confining pressure loading device 3; the operator opens the cover on the side of the test box 1, pushes the infrared thermal imaging temperature measuring device 5 to the transparent observation window 11 in the test box 1 and seals it, starts the confining pressure loading device 3, provides a pressure source through the hydraulic pump 32, and the pressure control valve 33 accurately adjusts the confining pressure applied to the rock sample; at the same time, turn on the microwave irradiation device 2, the magnetron 21 generates microwaves, transmits the microwave energy to the rock sample through the waveguide 22 and the microwave transmitter 23, and the infrared thermal imaging temperature measuring device 5 monitors the temperature distribution of various parts of the rock sample in real time; turns off the microwave irradiation device 2, and after completing the temperature measurement, pushes out the infrared thermal imaging temperature measurement device 1, and then covers the cover plate to carry out the blasting simulation test; after the rock sample is cooled, starts the high-pressure gas blasting device 4, the compressed gas bottle 41 releases the high-pressure gas, and the gas pressure is increased by the gas booster pump 42. The gas pressure regulating valve 43 accurately adjusts the pressure of the gas before blasting, and the high-pressure gas enters the high-pressure pressure autoclave 45 to carry out the blasting simulation test on the rock sample. During the blasting process, the stress sensor 44 monitors the stress change of the rock sample, and the safety protection cover 46 protects the operator from injury; collects and records various data during the test, including the size of the confining pressure, the microwave irradiation parameters, the blasting pressure, the temperature change of the rock sample, and the stress change; then, processes and analyzes the collected data to evaluate the effect of the coordinated rock breaking of microwave and blasting, as well as the influence of different parameters on the rock breaking effect.

[0043] The simulation environment requires the use of two microwave irradiation modes:

[0044] The first mode: When the original rock is insufficient, it is necessary to use similar simulated materials to test and determine the mix ratio. In this case, no confining pressure is applied and microwave irradiation is performed directly to facilitate observation of the effect of microwaves on the material. The microwave irradiation device 2 is used to irradiate the entire surface of the rock sample ( Figure 8 (shown)

[0045] In the first use mode, the test system first irradiates the entire surface of the rock sample with microwaves through the microwave irradiation device 2. The microwave irradiation device 2 includes components such as a magnetron 21, a waveguide 22, and a microwave transmitter 23, which work together to evenly transfer microwave energy to the entire surface of the rock sample. Microwaves have strong penetrability and fast heating speed, and can quickly change the physical and mechanical properties of rocks and reduce their strength.

[0046] The second mode: In the case of formally conducting the rock sample microwave pre-splitting blasting coordinated test, the rock sample can be drilled, and after the blast hole is drilled, the microwave transmitter 23 is inserted into the drill hole to irradiate the inside of the hole wall ( Fig. 9 (shown)

[0047] In the second mode of use, the test device will first pre-drill blastholes in the rock sample. Parameters such as the location, number and depth of the blastholes will be preset according to specific test requirements.

[0048] Then, the microwave transmitter 23 is inserted into the blasthole through a specific device to irradiate the rock around the blasthole with microwaves. Since the microwave transmitter is directly inserted into the blasthole, the microwave energy can be transmitted more concentratedly, generating stronger thermal and stress effects on the rock around the blasthole.

[0049] When testing the high-pressure gas blasting device, the following two blasting simulation methods can be selected according to different simulation requirements:

[0050] The first method: When the shock wave of the high-pressure gas is not sufficient to destroy the test piece, explosives are used for blasting simulation. This method requires disassembling the outer shell of the test box 1, taking out the microwave irradiation device 2, the high-pressure gas blasting device 4 and the infrared thermal imaging temperature measurement device 5, and only leaving the confining pressure loading device 3 for testing.

[0051] First, you need to prepare an appropriate amount of explosives, and accurately calculate the type, quantity and placement of the required explosives according to the specific requirements of the test. The selection of explosives should be based on the characteristics of the simulated object, the expected blasting effect and safety factors.

[0052] Next, install the explosives at the predetermined location of the simulated object and ensure that the explosives are correctly connected to the detonation device. The detonation device usually includes components such as detonators and wires, which are responsible for accurately and quickly detonating the explosives after receiving the trigger signal.

[0053] After ensuring that all safety measures are in place, the detonator is triggered remotely or manually to cause the explosives to explode at the predetermined location. The huge energy released when the explosives explode will simulate the real explosion effect, including shock waves, vibrations, and flying debris.

[0054] The second method: using a high-pressure gas device to simulate explosion ( Fig.10 (shown)

[0055] A high-pressure gas device will be used to simulate the blasting effect.

[0056] First, according to the test requirements, set the parameters of high-pressure gas such as pressure, flow rate and release time. The rapid release of high-pressure gas will simulate the strong shock wave and vibration effect formed by explosive blasting inside the test block, thereby simulating the mechanical effect of blasting. At the same time, by adjusting the parameters of high-pressure gas, accurate simulation of different blasting effects can be achieved.

[0057] In summary, the deep rock mass microwave pre-splitting blasting coordinated rock breaking test system of the present invention can simulate conditions in different environments and implement multiple schemes according to different test requirements.

[0058] Example 2

[0059] The test method using the deep rock mass microwave and blasting coordinated rock breaking test device with pre-confining pressure provided in Example 1 comprises the following steps:

[0060] S1. System assembly and presetting: Assemble the test box 1, microwave irradiation device 2, confining pressure loading device 3, high-pressure gas blasting device 4 and infrared thermal imaging temperature measuring device 5 to form a complete test system; during the assembly process, ensure that the microwave emitter 23 of the microwave irradiation device 2 can accurately align with the rock sample in the test box 1, the pressure plate 36 of the confining pressure loading device 3 can stably transmit the confining pressure to the rock sample box 34, and the high-pressure autoclave 45 of the high-pressure gas blasting device 4 is safely and reliably connected to the test box 1; at the same time, adjust the spatial layout inside the test box 1 and the parameter settings of the microwave irradiation device 2 and the high-pressure gas blasting device 4 according to the specific needs of the test;

[0061] S2. Preparation and installation of rock samples: Select appropriate rock materials, process them into rock samples of required shapes and sizes according to test requirements, and place them in the rock sample box 34; then, install the rock sample box 34 on the pressure plate 36 of the confining pressure loading device 3 to ensure that the rock sample can stably withstand the confining pressure during the test; at this time, the installation of the rock sample can be observed through the transparent observation window 11 to ensure that everything is ready;

[0062] S3, confining pressure loading and microwave irradiation: open the cover on the side of the test box 1, push the infrared thermal imaging temperature measuring device 5 to the transparent observation window 11 in the test box 1 and seal it, start the confining pressure loading device 3, provide a pressure source through the hydraulic pump 32, and the pressure control valve 33 accurately adjusts the confining pressure applied to the rock sample; at the same time, turn on the microwave irradiation device 2, the magnetron 21 generates microwaves, and transmits microwave energy to the rock sample through the waveguide 22 and the microwave transmitter 23; during the microwave irradiation process, the microwave emission parameters such as power, frequency and irradiation time can be adjusted according to the test requirements; the infrared thermal imaging temperature measuring device 5 monitors the temperature distribution of various parts of the rock sample in real time to ensure the uniformity and effectiveness of microwave irradiation;

[0063] S4, high-pressure gas blasting simulation: turn off the microwave irradiation device 2, and push the infrared thermal imaging temperature measuring device 5 out of the test box 1. After the rock sample is cooled to below 40°C, start the high-pressure gas blasting device 4, and the compressed gas bottle 41 releases the high-pressure gas. The gas pressure is increased by the gas booster pump 42. The gas pressure regulating valve 43 accurately adjusts the pressure of the gas before blasting. The high-pressure gas enters the high-pressure autoclave 45, and the rock sample is subjected to a blasting simulation test. During the blasting process, the stress sensor 44 monitors the stress change of the rock sample, and the safety protection cover 46 protects the operator from injury;

[0064] S5. Data recording and analysis: Collect and record various data during the test, including confining pressure, microwave irradiation parameters, blasting pressure, rock sample temperature changes, and stress changes; then process and analyze the collected data to evaluate the effect of microwave and blasting synergistic rock breaking, as well as the impact of different parameters on the rock breaking effect; based on the analysis results, the test parameters can be further optimized to improve the efficiency and safety of deep rock mining.

[0065] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A deep rock mass microwave pre-splitting blasting collaborative rock breaking test system, characterized in that: It comprises a test box (1), a microwave irradiation device (2), a confining pressure loading device (3), a high-pressure gas blasting device (4) and an infrared thermal imaging temperature measuring device (5); A plurality of microwave irradiation devices (2) are arranged in the test box (1), a confining pressure loading device (3) is arranged on the lower surface of the test box (1), a high-pressure gas blasting device (4) is also arranged in the test box (1), and an infrared thermal imaging temperature measuring device (5) is arranged on one side outside the test box (1).

2. A deep rock mass microwave pre-splitting blasting collaborative rock breaking test system according to claim 1, characterized in that: The front of the test box (1) is provided with a sealed door (12), the sealed door (12) is provided with a transparent observation window (11), and one side of the test box (1) is provided with a movable cover.

3. A deep rock mass microwave pre-splitting blasting collaborative rock breaking test system according to claim 1, characterized in that: Each microwave irradiation device (2) comprises a magnetron (21), wherein the magnetron (21) is connected to a microwave transmitter (23) via a waveguide (22), the lower end of the magnetron (21) is connected to a water cooling system (26), and a microwave controller (24) and a microwave protector (25) are arranged on the waveguide (22).

4. A deep rock mass microwave pre-splitting blasting collaborative rock breaking test system according to claim 1, characterized in that: The confining pressure loading device (3) comprises a rock sample box (34), and pressure plates (36) are arranged outside the four side walls of the rock sample box (34), and each of the pressure plates (36) is provided with a pressure sensor (35) and a loading control system (38), and one end of each of the pressure plates (36) is provided with a cooling system (37), and the upper end of each of the pressure plates (36) is provided with a sliding rod (31), and each of the cooling systems (37) is provided with a pressure control valve (33), and one end of each of the cooling systems (37) is provided with a hydraulic pump (32).

5. The deep rock mass microwave pre-splitting blasting collaborative rock breaking test system according to claim 1 is characterized in that: The high-pressure gas blasting device (4) comprises a compressed gas bottle (41), the upper end of which is connected in sequence to a gas booster pump (42), a gas pressure regulating valve (43) and a high-pressure autoclave (45) through pipelines, a stress sensor (44) is arranged on the outer wall of the high-pressure autoclave (45), and the outside of the high-pressure autoclave (45) is covered with a safety protection cover (46); a one-way valve is arranged between the gas booster pump (42) and the compressed gas bottle (41).

6. A deep rock mass microwave pre-splitting blasting collaborative rock breaking test system according to claim 1, characterized in that: The infrared thermal imaging temperature measuring device (5) comprises a base (51), a surface of the base (51) is provided with a plurality of fixing frames (52), a slide groove (54) is fixedly connected to the plurality of fixing frames (52), an infrared temperature measuring detector (53) is provided on the slide groove (54), and a display screen (55) is provided on the surface of the infrared temperature measuring detector (53).

7. A deep rock mass microwave pre-splitting blasting coordinated rock breaking test system according to claim 6, characterized in that: The number of the fixing frames (52) is two.

8. A test method using a deep rock mass microwave pre-splitting blasting coordinated rock breaking test system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. System assembly and presetting: Assemble the test box (1), microwave irradiation device (2), confining pressure loading device (3), high-pressure gas blasting device (4) and infrared thermal imaging temperature measuring device (5), and adjust the spatial layout inside the test box (1) and the parameter settings of the microwave irradiation device (2) and the high-pressure gas blasting device (4) according to the specific requirements of the test; S2. rock sample preparation and installation: processing the rock sample into a required shape and size according to the test requirements, and placing it in the rock sample box (34), and then installing the rock sample box (34) on the pressure plate (36) of the confining pressure loading device (3); S3, confining pressure loading and microwave irradiation: open the cover plate on the side of the test box (1), push the infrared thermal imaging temperature measuring device (5) to the transparent observation window (11) in the test box (1) and seal it, start the confining pressure loading device (3), provide a pressure source through the hydraulic pump (32), and the pressure control valve (33) accurately adjusts the confining pressure applied to the rock sample; at the same time, turn on the microwave irradiation device (2), the magnetron (21) generates microwaves, and transmits microwave energy to the rock sample through the waveguide (22) and the microwave transmitter (23); the infrared thermal imaging temperature measuring device (5) monitors the temperature distribution of various parts of the rock sample in real time; S4, high-pressure gas explosion simulation: the microwave irradiation device (2) is turned off, and the infrared thermal imaging temperature measuring device (5) is pushed out of the test box (1). After the rock sample is cooled to below 40° C., the high-pressure gas explosion device (4) is started, the compressed gas bottle (41) releases high-pressure gas, and the gas pressure is increased by the gas booster pump (42). The gas pressure regulating valve (43) accurately adjusts the pressure of the gas before explosion. The high-pressure gas enters the high-pressure autoclave (45), and an explosion simulation test is performed on the rock sample. The stress sensor (44) is used to monitor the stress change of the rock sample. The safety protection cover (46) protects the operator from injury. S5. Data recording and analysis: Collect and record various data during the test, including confining pressure, microwave irradiation parameters, blasting pressure, rock sample temperature changes, and stress changes; Subsequently, the collected data were processed and analyzed to evaluate the synergistic rock-breaking effect of microwave and blasting, as well as the influence of different parameters on the rock-breaking effect.

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