Modular multi-modal rock breaking test system and method

Abstract

The application discloses a modular multi-modal rock breaking test system and method, and relates to the technical field of geotechnical test engineering; the system comprises a drilling module, a while-drilling monitoring module, a double-shaft loading module and a composite rock breaking module; the drilling module comprises a drilling platform, a mounting seat and a drilling machine; the mounting seat is rotationally connected to the drilling platform; a multi-cylinder holder is arranged on the mounting seat; the drilling machine is slidingly connected to the mounting seat; a drill rod of the drilling machine is clamped in the multi-cylinder holder; a feeding oil cylinder is arranged on the mounting seat; a driving assembly is further arranged on the drilling platform; the while-drilling monitoring module comprises a plurality of sensors; the double-shaft loading module comprises a test box and a turnover system; the application realizes multi-cutter composite rock breaking test, hole array hydraulic pulse mutagenesis modification test and hard rock electric explosion thermal composite rock breaking test through a plurality of drill bits, a plurality of cutters, hydraulic fracturing rods and electric explosion tubes, and fuses the composite rock breaking mode; and the application provides a theoretical basis and process parameter optimization guidance for efficient rock breaking of deep hard rock.

Description

Technical Field

[0001] This invention relates to the field of geotechnical testing engineering technology, and in particular to a modular multimodal rock breaking test system and method. Background Technology

[0002] With the increasing depletion of shallow mineral resources, mineral resource extraction and underground engineering construction are developing towards deeper levels. Deep rock masses are situated in complex geological environments characterized by high ground stress, high temperature, and high permeability. Their mechanical behavior, failure modes, and response mechanisms to rock-breaking tools differ significantly from those of shallow rock masses, posing a tremendous challenge to the safe and efficient construction of deep engineering projects.

[0003] Indoor physical model testing is a key method for studying the mechanical properties and rock-breaking mechanisms of deep rock masses. However, existing rock testing equipment has significant limitations: First, most traditional triaxial testing instruments have limited functionality, only capable of simple loading or drilling tests, making it difficult to simulate the complex working conditions involving the coupled effects of multiple rock-breaking methods such as mechanical-hydraulic-thermal processes. Second, existing equipment lacks sufficient environmental simulation capabilities, failing to simultaneously achieve biaxial stress loading, high-temperature water bath environment simulation, and the integration and switching of multiple rock-breaking processes on the same platform. This results in a significant discrepancy between the test environment and actual deep geological conditions, leading to low reliability of test data. Furthermore, monitoring methods during the testing process are outdated, lacking high-frequency, multi-dimensional monitoring while drilling and real-time data analysis capabilities. This makes it impossible to establish a precise mapping relationship between drilling parameters and rock mass properties, hindering real-time inversion of rock mass properties and intelligent prediction of drillability and cutability. Summary of the Invention

[0004] To systematically study the failure mechanism and tool interaction law of deep rocks under different stresses, temperatures and rock-breaking modes, this application provides a modular multimodal rock-breaking test system and method.

[0005] Firstly, this application provides a modular multimodal rock-breaking test system, which adopts the following technical solution:

[0006] A modular multimodal rock breaking test system includes a drilling module, a drilling monitoring module, a biaxial loading module, and a composite rock breaking module;

[0007] The drilling module includes a drilling platform, a mounting base, and a drilling rig. The mounting base is rotatably connected to the drilling platform, with its rotation axis set horizontally. The mounting base is equipped with a multi-cylinder clamp. The drilling rig is slidably connected to the mounting base, and the drill rod of the drilling rig is clamped in the multi-cylinder clamp. Cutting heads or drill bits are detachably mounted on the drill rod. The drill bit can be any one of a core drill bit, roller cone drill bit, ball tooth drill bit, or twist drill bit. The cutting head can be any one of a pick-type cutting head or a hobbing cutter head. The mounting base is equipped with a feed cylinder for driving the drilling rig's feed, and the drilling platform is also equipped with a drive assembly for driving the mounting base to rotate.

[0008] The monitoring while drilling module includes several sensors, specifically: a speed-torque composite sensor, a composite stress detection component, a wire displacement sensor, an acoustic emission and vibration sensor, which are used to collect equipment parameters in real time during the drilling process.

[0009] The biaxial loading module includes a test chamber and a tilting system. The test chamber is used to hold the sample and provide biaxial confining pressure, while the tilting system is connected to the test chamber and is used to drive the test chamber to rotate along the horizontal axis.

[0010] Optionally, the drive assembly includes a folding cylinder and a folding support. The folding support includes an upper connecting rod and a lower connecting rod that are hinged to each other. The lower connecting rod is rotatably connected to the drilling platform, and the upper connecting rod is rotatably connected to the mounting base. The two ends of the folding cylinder are respectively rotatably connected to the drilling platform and the upper connecting rod, and the folding cylinder and the lower connecting rod are staggered.

[0011] Optionally, the flipping system includes a base frame, with a movable seat slidably connected to the base frame in the horizontal direction; the test chamber is rotatably connected to the movable seat, the rotation axis of the test chamber is set in the horizontal direction, and a connecting rod is also provided on the base frame, with both ends of the connecting rod rotatably connected to the base frame and the test chamber respectively; a test chamber is provided on the surface of the test chamber for placing the test box, and a drainage hole is provided at the bottom of the test chamber; loading cylinders for loading the sample are provided on two opposite sides of the test chamber; a flipping cylinder for driving the movable seat to slide is also provided on the base frame; a loading block for abutting the loading cylinder is provided through the side of the test box, and a sealing strip is provided at the connection between the loading block and the test box; a heating platform and a temperature sensor are provided inside the test box.

[0012] Optionally, the drilling platform includes an upper platform and a lower platform. The upper platform is slidably connected to the lower platform in a vertical direction. The lower platform is also provided with lifting cylinders at the four corners for driving the upper platform to slide. The mounting base is rotatably connected to the upper platform. The bottom frame is detachably connected to the lower platform by multiple bolts.

[0013] Optionally, the speed-torque composite sensor is located at the spindle of the drilling rig; the composite stress detection assembly includes a hydraulic pressure sensor and a stress sensor, which are respectively located at the oil inlet of the feed cylinder and the end of the telescopic rod; the fixed end of the wire displacement sensor is located on the mounting base, and the movable end is located on the drilling rig; the acoustic emission and vibration sensors are located at the front end of the drill rod.

[0014] Optionally, the composite rock-breaking module includes a hydraulic fracturing component and an electro-explosive rock-breaking component; the hydraulic fracturing component includes a hydraulic loading plate and a hollow-structured perforated hydraulic loading rod; the perforated hydraulic loading rod has dense holes on its surface and a hydraulic sealing ring is fitted at its upper end; the electro-explosive rock-breaking component includes an electro-explosive rod, which includes a sealing shell and an electro-explosive wire disposed inside it.

[0015] Secondly, this application provides a modular multimodal rock breaking test method, which adopts the following technical solution:

[0016] A modular multimodal composite rock-breaking test method, employing the modular multimodal rock-breaking test system described in the first aspect, includes the following steps:

[0017] S1. Load the sample into the test chamber and apply a preset confining pressure to the sample through the biaxial loading module according to the test objective; when it is necessary to simulate a complex multi-field environment, further apply a temperature field and / or a fluid interaction field to the sample.

[0018] S2. Select and install the corresponding rock-breaking execution unit according to the target rock-breaking mode. The rock-breaking execution unit is one or more of a drill bit, cutter head, hydraulic fracturing assembly, or electric explosion rock-breaking assembly.

[0019] S3. Adjust the tilt angle of the mounting base and the flipping posture of the test chamber to set the relative action direction between the rock-breaking actuator and the sample;

[0020] S4. The sample is subjected to hydraulic mutation modification, electro-explosive thermal-assisted rock breaking, mechanical rock breaking or a combination thereof, and the rotational speed, torque, thrust, displacement, acoustic emission, vibration and environmental parameters are collected synchronously through the drilling monitoring module.

[0021] S5. Based on the collected test data, evaluate the failure response of the samples under different rock-breaking modes or different action sequences, and obtain the rock-breaking test evaluation results.

[0022] Optionally, a composite rock-breaking efficiency enhancement coefficient is constructed in step S5. The composite rock-breaking efficiency enhancement coefficient is used to characterize the degree to which the mutation modification treatment improves the efficiency of subsequent mechanical rock breaking. Calculate according to the following formula:

[0023] ;

[0024] in: The average propulsive force during the mechanical rock-breaking stage before mutation modification; The average propulsive force during the mechanical rock-breaking stage after mutation modification; The average torque during the mechanical rock-breaking stage before mutation modification; The average torque during the mechanical rock-breaking stage after mutation modification; The average drilling speed during the mechanical rock-breaking stage before mutation modification; The average drilling speed during the mechanical rock-breaking stage after mutation modification; The average rock-breaking specific energy during the mechanical rock-breaking stage before mutation modification; The average rock-breaking specific energy during the mechanical rock-breaking stage after mutation modification; Let be the weighting coefficient, and satisfy: ;

[0025] when When the value increases, it indicates that the mutation modification has a stronger synergistic effect on subsequent mechanical rock breaking.

[0026] Optionally, before mechanical drilling or cutting the sample, the sample is first subjected to mutagenesis modification treatment using the hydraulic fracturing assembly and the electro-explosive rock breaking assembly; then, while keeping the sample clamping state or loading boundary conditions unchanged, the sample is mechanically broken using a drill bit or cutter head; and based on the composite rock breaking synergy coefficient... A continuous comparative evaluation of the mechanical rock-breaking response before and after mutation modification was conducted.

[0027] By adjusting the rotation angle of the mounting base and the tilt angle of the test chamber, the relative interaction direction between the rock-breaking actuator and the sample is changed to simulate the rock-breaking process under different bedding directions, joint directions, or structural orientations; and the combined rock-breaking efficiency coefficients under different relative interaction directions are compared. The differences in rock-breaking energy and failure mode were used to evaluate the influence of the contact mode between the sample and the rock-breaking tool on the composite rock-breaking effect.

[0028] Optionally, step S5 also involves constructing a crack response activation index. The crack response activation index is used to characterize the activity of crack initiation, propagation, and penetration during rock breaking. Calculate according to the following formula:

[0029] ;

[0030] in, This is a normalized characteristic of the acoustic emission response; This is a normalized characteristic quantity of the vibration response; These are the normalized characteristic quantities for the pressure drop response and / or the normalized characteristic quantities for the confining pressure fluctuation; Let be the weighting coefficients, and satisfy: ;

[0031] Furthermore, a comprehensive composite rock breaking evaluation index was constructed. The comprehensive composite rock breaking evaluation index Calculate according to the following formula:

[0032] The comprehensive composite rock-breaking evaluation index It is used to uniformly rank and evaluate the combined rock-breaking effects of different rock-breaking modes, different action sequences, or different working conditions;

[0033] in, , As a composite weight, the weights can be adjusted appropriately according to the specific research direction.

[0034] In summary, this application includes the following beneficial technical effects:

[0035] This application, through the setup of a drilling module, a monitoring-while-drilling module, a biaxial loading module, and a composite rock-breaking module, enables the conduct of multi-factor cross-tests involving "geo-stress × lithology × mechanical × hydraulic × thermal". Based on the collected data, and combining numerical analysis and machine learning methods, it conducts in-depth research on the energy transfer efficiency, crack propagation laws, and rock mass failure mechanisms of multi-modal and multi-mode composite rock breaking under complex deep working conditions. This provides a key experimental platform for establishing a precise mapping relationship between drilling parameters and rock mass properties, optimizing mechanical cutting tool rock-breaking technology, and evaluating the effectiveness of novel rock-breaking methods. Attached Figure Description

[0036] Figure 1 This is an overall structural diagram of the modular multimodal rock-breaking test system of this application;

[0037] Figure 2 yes Figure 1 A schematic diagram of the overall structure of the drilling module;

[0038] Figure 3 yes Figure 2 A schematic diagram of the overall structure of the drilling rig and the monitoring module during drilling;

[0039] Figure 4 yes Figure 1 A schematic diagram of the overall structure of the dual-axis loading module;

[0040] Figure 5 yes Figure 1 A schematic diagram of the overall structure of the composite rock-breaking module.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Drilling module; 11. Drilling platform; 111. Upper platform; 112. Lower platform; 113. Lifting cylinder; 12. Mounting base; 13. Drilling rig; 14. Multi-cylinder clamp; 15. Drill rod; 16. Feed cylinder; 17. Folding support; 171. Upper connecting rod; 172. Lower connecting rod; 18. Folding cylinder; 2. Dual-axis loading module; 21. Test chamber; 22. Base frame; 23. Moving base; 24. Loading cylinder; 25. 26. Connecting rod; 31. Tilting cylinder; 32. Speed-torque composite sensor; 33. Stress sensor; 34. Hydraulic pressure sensor; 35. Wire displacement sensor; 46. Acoustic emission and vibration sensor; 57. Composite rock breaking module; 48. Hydraulic loading plate; 49. Hole array hydraulic loading rod; 50. Electric explosion rod; 51. Roller cone drill bit; 52. Core drill bit; 53. Twist drill bit; 54. Ball tooth drill bit; 55. Hob cutter head; 56. Pick-type cutting tooth cutter head. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0044] This application discloses a modular multimodal rock breaking test system, including a drilling module 1, a drilling monitoring module, a biaxial loading module 2, and a composite rock breaking module 4;

[0045] The drilling module 1 includes a drilling platform 11, a mounting base 12, and a drilling rig 13. The drilling platform 11 includes an upper platform 111 and a lower platform 112. The upper platform 111 is slidably connected to the lower platform 112 in a vertical direction. The lower platform 112 is also equipped with lifting cylinders 113 at the four corners for driving the upper platform 111 to slide. The mounting base 12 is rotatably connected to the upper platform 111, and its rotation axis is set in a horizontal direction. The mounting base 12 is equipped with a multi-cylinder clamp 14, which uses three small hydraulic cylinders to extend and retract to clamp. The drill rod 15 is held in a multi-cylinder clamp 14. The drill rod 15 is slidably connected to the mounting base 12. The drill rod 15 is detachably mounted with a cutter head or a drill bit. The drill bit is any one of a core drill bit 52, a roller cone drill bit 51, a ball tooth drill bit 54, and a twist drill bit 53. The cutter head is any one of a pick-type cutting tooth cutter head 56 and a hobbing cutter head 55. The mounting base 12 is provided with a feed cylinder 16 for driving the drill 13 to feed. The drilling platform 11 is also provided with a drive assembly for driving the mounting base 12 to rotate.

[0046] The drive assembly includes a folding cylinder 18 and a folding support 17. The folding support 17 includes an upper connecting rod 171 and a lower connecting rod 172 that are hinged to each other. The lower connecting rod 172 is rotatably connected to the drilling platform 11, and the upper connecting rod 171 is rotatably connected to the mounting base 12. The two ends of the folding cylinder 18 are rotatably connected to the drilling platform 11 and the upper connecting rod 171, respectively. The folding cylinder 18 and the lower connecting rod 172 are staggered. When the folding cylinder 18 extends or retracts, the folding support 17 rotates to synchronously drive the mounting base 12 and the drilling rig 13 to rotate, thereby drilling or cutting the sample at different angles.

[0047] The dual-axis loading module 2 includes a test chamber 21 and a tilting system. The test chamber 21 is an open-sided chamber. The tilting system includes a base frame 22, which is connected to the lower platform 112 by four bolts. A movable seat 23 is slidably connected to the base frame 22 in the horizontal direction. The test chamber 21 is rotatably connected to the movable seat 23, and the rotation axis of the test chamber 21 is set in the horizontal direction. A connecting rod 25 is also provided on the base frame 22, and the two ends of the connecting rod 25 are rotatably connected to the base frame 22 and the test chamber 21, respectively. The surface of the test chamber 21 is opened with... The test chamber has a test box for placing test boxes. The bottom of the test chamber has a drainage hole. The bottom surface of the bottom frame 22 is equipped with a sewage treatment system. The two opposite sides of the test box 21 are equipped with loading cylinders 24 for loading the test sample. The side of the test box is provided with a loading block for abutting the loading cylinder 24. The connection between the loading block and the test box is equipped with a sealing strip. The test box is equipped with a test sample heating platform and a temperature sensor. The bottom frame 22 is also equipped with a tilting cylinder 26 for driving the sliding seat 23. The tilting cylinder 26 extends and retracts to drive the test box 21 to rotate.

[0048] The drilling monitoring module includes a speed-torque composite sensor 31, a composite stress detection component, a wire displacement sensor 34, and an acoustic emission and vibration sensor 35. The speed-torque composite sensor 31 is located at the spindle of the drilling rig 13 to collect speed and torque data in real time. The composite stress detection component includes a hydraulic pressure sensor 33 and a stress sensor 32. The hydraulic pressure sensor 33 is located at the oil inlet of the feed cylinder 16, and the stress sensor 32 is located at the connection point of the extension rod end of the feed cylinder 16 for real-time output of thrust. The fixed end of the wire displacement sensor 34 is located on the mounting base 12, and the movable end is located on the drilling rig 13. The acoustic emission and vibration sensor 35 is located at the front end of the drill pipe 15 to collect acoustic emission and vibration data during the test.

[0049] The composite rock-breaking module 4 includes a hydraulic fracturing component and an electro-explosive rock-breaking component; the hydraulic fracturing component includes a hydraulic loading plate 41 and a hollow pore array hydraulic loading rod 42; the pore array hydraulic loading rod 42 has multiple through holes arranged on its surface, and a hydraulic sealing ring is fitted on its upper end; the electro-explosive rock-breaking component includes an electro-explosive rod 43, which includes a sealing shell and an electro-explosive wire disposed inside it.

[0050] This application also provides a modular multimodal composite rock breaking test method, comprising the following steps:

[0051] S1. Load the sample into the test chamber 21 and apply a preset confining pressure to the sample through the biaxial loading module 2 according to the test target; when it is necessary to simulate a complex multi-field environment, apply a temperature field and / or a fluid interaction field to the sample.

[0052] S2. Select and install the corresponding rock-breaking execution unit according to the target rock-breaking mode. The rock-breaking execution unit is one or more of a drill bit, cutter head, hydraulic fracturing assembly, or electric explosion rock-breaking assembly.

[0053] S3. Adjust the tilt angle of the mounting base 12 and the flipping posture of the test chamber 21 to set the relative action direction between the rock breaking actuator and the sample;

[0054] S4. The sample is subjected to hydraulic mutation modification, electro-explosive thermal-assisted rock breaking, mechanical rock breaking or a combination thereof, and the rotational speed, torque, thrust, displacement, acoustic emission, vibration and environmental parameters are collected synchronously through the drilling monitoring module.

[0055] S5. Based on the collected test data, evaluate the failure response of the samples under different rock-breaking modes or different action sequences, and obtain the rock-breaking test evaluation results.

[0056] In step S5, a composite rock-breaking efficiency enhancement coefficient is constructed. The composite rock-breaking efficiency enhancement coefficient is used to characterize the degree to which the mutation modification treatment improves the efficiency of subsequent mechanical rock breaking. Calculate according to the following formula:

[0057] ;

[0058] in: The average propulsive force during the mechanical rock-breaking stage before mutation modification; The average propulsive force during the mechanical rock-breaking stage after mutation modification; The average torque during the mechanical rock-breaking stage before mutation modification; The average torque during the mechanical rock-breaking stage after mutation modification; The average drilling speed during the mechanical rock-breaking stage before mutation modification; The average drilling speed during the mechanical rock-breaking stage after mutation modification; The average rock-breaking specific energy during the mechanical rock-breaking stage before mutation modification; The average rock-breaking specific energy during the mechanical rock-breaking stage after mutation modification; Let be the weighting coefficients, and satisfy: ;

[0059] when When the value increases, it indicates that the mutation modification has a stronger synergistic effect on subsequent mechanical rock breaking;

[0060] Before mechanical drilling or cutting of the sample, the sample is first subjected to mutation modification treatment using hydraulic fracturing components and electric explosive rock breaking components; then, while keeping the sample clamping state or loading boundary conditions unchanged, the sample is mechanically broken by a drill bit or cutter head; and the mechanical rock breaking response before and after mutation modification is continuously compared and evaluated based on the composite rock breaking efficiency coefficient.

[0061] By adjusting the rotation angle of the mounting base 12 and the flip angle of the test chamber 21, the relative action direction between the rock-breaking execution unit and the sample is changed to simulate the rock-breaking process under different bedding directions, joint directions or structural orientations; and the differences in the composite rock-breaking efficiency coefficient, rock-breaking specific energy and failure mode under different relative action directions are compared to evaluate the influence of the contact mode between the sample and the rock-breaking tool on the composite rock-breaking effect.

[0062] Step S5 also involves constructing a crack response activation index. The crack response activation index is used to characterize the activity of crack initiation, propagation, and penetration during rock breaking. Calculate according to the following formula:

[0063] ;

[0064] in, This is a normalized characteristic of the acoustic emission response; This is a normalized characteristic quantity of the vibration response; These are the normalized characteristic quantities for the pressure drop response and / or the normalized characteristic quantities for the confining pressure fluctuation; Let be the weighting coefficients, and satisfy: ;

[0065] Furthermore, a comprehensive composite rock breaking evaluation index was constructed. The comprehensive composite rock breaking evaluation index Calculate according to the following formula:

[0066] The comprehensive composite rock-breaking evaluation index It is used to uniformly rank and evaluate the combined rock-breaking effects of different rock-breaking modes, different action sequences, or different working conditions;

[0067] in, , As a composite weight, the weights can be adjusted appropriately according to the specific research direction.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A modular multimodal composite rock-breaking test method, employing a modular multimodal rock-breaking test system, characterized in that, The system includes a drilling module, a monitoring while drilling module, a dual-axis loading module, and a composite rock breaking module; The monitoring while drilling module is used to collect equipment parameters in real time during the drilling process; the biaxial loading module includes a test chamber and a tilting system. The test chamber is used to clamp the sample and provide biaxial confining pressure, and the tilting system is connected to the test chamber to drive the test chamber to rotate along the horizontal axis; the composite rock breaking module includes a hydraulic fracturing component and an electro-explosive rock breaking component. The method includes the following steps: S1. Load the sample into the test chamber and apply a preset confining pressure to the sample through the biaxial loading module according to the test objective; when it is necessary to simulate a complex multi-field environment, further apply a temperature field and / or a fluid interaction field to the sample. S2. Select and install the corresponding rock-breaking execution unit according to the target rock-breaking mode. The rock-breaking execution unit is one or more of a drill bit, cutter head, hydraulic fracturing assembly, or electric explosion rock-breaking assembly. S3. Adjust the tilt angle of the mounting base and the flipping posture of the test chamber to set the relative action direction between the rock-breaking actuator and the sample; S4. The sample is subjected to hydraulic mutation modification, electro-explosive thermal-assisted rock breaking, mechanical rock breaking or a combination thereof, and the rotational speed, torque, thrust, displacement, acoustic emission, vibration and environmental parameters are collected synchronously through the drilling monitoring module. S5. Based on the collected test data, evaluate the failure response of the specimens under different rock-breaking modes or different action sequences, and obtain the rock-breaking test evaluation results. Step S5 involves constructing a composite rock-breaking efficiency coefficient. The composite rock-breaking efficiency enhancement coefficient is used to characterize the degree to which the mutation modification treatment improves the efficiency of subsequent mechanical rock breaking. Calculate according to the following formula: ； in: The average propulsive force during the mechanical rock-breaking stage before mutation modification; The average propulsive force during the mechanical rock-breaking stage after mutation modification; The average torque during the mechanical rock-breaking stage before mutation modification; The average torque during the mechanical rock-breaking stage after mutation modification; The average drilling speed during the mechanical rock-breaking stage before mutation modification; The average drilling speed during the mechanical rock-breaking stage after mutation modification; The average rock-breaking specific energy during the mechanical rock-breaking stage before mutation modification; The average rock-breaking specific energy during the mechanical rock-breaking stage after mutation modification; Let be the weighting coefficients, and satisfy: ; when When the value increases, it indicates that the mutation modification has a stronger synergistic effect on subsequent mechanical rock breaking.

2. The modular multimodal composite rock-breaking test method according to claim 1, characterized in that: Before mechanical drilling or cutting of the sample, the sample is first subjected to mutation modification treatment using the hydraulic fracturing assembly and the electro-explosive rock breaking assembly; then, while keeping the sample clamping state or loading boundary conditions unchanged, the sample is mechanically broken using a drill bit or cutter head; and based on the composite rock breaking synergy coefficient... A continuous comparative evaluation of the mechanical rock-breaking response before and after mutation modification was conducted. By adjusting the rotation angle of the mounting base and the tilt angle of the test chamber, the relative interaction direction between the rock-breaking actuator and the sample is changed to simulate the rock-breaking process under different bedding directions, joint directions, or structural orientations; and the combined rock-breaking efficiency coefficients under different relative interaction directions are compared. The differences in rock-breaking energy and failure mode were used to evaluate the influence of the contact mode between the sample and the rock-breaking tool on the composite rock-breaking effect.

3. The modular multimodal composite rock-breaking test method according to claim 2, characterized in that: Step S5 also involves constructing a crack response activation index. The crack response activation index is used to characterize the activity of crack initiation, propagation, and penetration during rock breaking. Calculate according to the following formula: ； in, This is a normalized characteristic of the acoustic emission response; This is a normalized characteristic quantity of the vibration response; These are the normalized characteristic quantities for the pressure drop response and / or the normalized characteristic quantities for the confining pressure fluctuation; Let be the weighting coefficients, and satisfy: ; Furthermore, a comprehensive composite rock breaking evaluation index was constructed. The comprehensive composite rock-breaking evaluation index Calculate according to the following formula: The comprehensive composite rock-breaking evaluation index It is used to uniformly rank and evaluate the combined rock-breaking effects of different rock-breaking modes, different action sequences, or different working conditions; in, , It is a composite weight, and the weight can be adjusted according to the specific research direction.

4. The modular multimodal rock-breaking test method according to claim 3, characterized in that: The drilling module includes a drilling platform, a mounting base, and a drilling rig. The mounting base is rotatably connected to the drilling platform, with its rotation axis set horizontally. The mounting base is equipped with a multi-cylinder clamp. The drilling rig is slidably connected to the mounting base, and the drill rod of the drilling rig is clamped in the multi-cylinder clamp. Cutting heads or drill bits are detachably mounted on the drill rod. The drill bit can be any one of a core drill bit, roller cone drill bit, ball tooth drill bit, or twist drill bit, and the cutting head can be any one of a pick-type cutting head or a hobbing cutter head. The mounting base is equipped with a feed cylinder for driving the drilling rig's feed, and the drilling platform is also equipped with a drive assembly for driving the mounting base to rotate. The monitoring while drilling module includes several sensors, specifically: a speed-torque composite sensor, a composite stress detection component, a wire displacement sensor, an acoustic emission and vibration sensor, which are used to collect equipment parameters in real time during the drilling process. The biaxial loading module includes a test chamber and a tilting system. The test chamber is used to hold the sample and provide biaxial confining pressure, while the tilting system is connected to the test chamber and is used to drive the test chamber to rotate along the horizontal axis.

5. The modular multimodal rock-breaking test method according to claim 4, characterized in that: The drive assembly includes a folding cylinder and a folding support. The folding support includes an upper connecting rod and a lower connecting rod that are hinged to each other. The lower connecting rod is rotatably connected to the drilling platform, and the upper connecting rod is rotatably connected to the mounting base. The two ends of the folding cylinder are rotatably connected to the drilling platform and the upper connecting rod, respectively, and the folding cylinder and the lower connecting rod are staggered.

6. The modular multimodal rock-breaking test method according to claim 5, characterized in that: The flipping system includes a base frame, with a movable seat slidably connected to the base frame in the horizontal direction; the test chamber is rotatably connected to the movable seat, with the rotation axis of the test chamber set in the horizontal direction; a connecting rod is also provided on the base frame, with both ends of the connecting rod rotatably connected to the base frame and the test chamber respectively; a test chamber is provided on the surface of the test chamber for placing the test box, and a drainage hole is provided at the bottom of the test chamber; loading cylinders for loading the sample are provided on two opposite sides of the test chamber; a flipping cylinder for driving the movable seat to slide is also provided on the base frame; a loading block for abutting the loading cylinder is provided through the side of the test box, and a sealing strip is provided at the connection between the loading block and the test box; a heating platform and a temperature sensor are provided inside the test box.

7. The modular multimodal rock-breaking test method according to claim 6, characterized in that: The drilling platform includes an upper platform and a lower platform. The upper platform is slidably connected to the lower platform in a vertical direction. The lower platform is also equipped with lifting cylinders at the four corners for driving the upper platform to slide. The mounting base is rotatably connected to the upper platform. The bottom frame is detachably connected to the lower platform by multiple bolts.

8. The modular multimodal rock-breaking test method according to claim 7, characterized in that: The speed-torque composite sensor is located at the spindle of the drilling rig; the composite stress detection assembly includes a hydraulic pressure sensor and a stress sensor, which are respectively located at the oil inlet of the feed cylinder and the end of the telescopic rod; the fixed end of the wire displacement sensor is located on the mounting base, and the movable end is located on the drilling rig; the acoustic emission and vibration sensors are located at the front end of the drill rod.

9. The modular multimodal rock-breaking test method according to claim 8, characterized in that: The composite rock-breaking module includes a hydraulic fracturing component and an electro-explosive rock-breaking component; the hydraulic fracturing component includes a hydraulic loading plate and a hollow-structured perforated hydraulic loading rod; the surface of the perforated hydraulic loading rod is provided with dense holes, and a hydraulic sealing ring is fitted at its upper end; the electro-explosive rock-breaking component includes an electro-explosive rod, which includes a sealing shell and an electro-explosive wire disposed inside it.

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