Rock breaking apparatus and method

Abstract

The rock breaking device and method disclosed by the application relate to the technical field of rock excavation, and the device comprises a drilling device, a monitoring unit, a calculation control module and an electric pulse cracking module; the monitoring unit collects working condition parameters such as drilling speed, drilling pressure, torque and rotating speed in the drilling process; the calculation control module inverses the rock hardness in real time according to the working condition parameters, and dynamically matches the target shock wave energy; the electric pulse cracking module comprises an energy storage unit and an electric explosion drill bit, and the electric explosion drill bit excites an enhanced shock wave through a metal wire between electrodes and an energy-containing elastic body. The method realizes precise rock breaking by identifying the rock hardness in real time while drilling, adaptively adjusting the discharge parameters, and combining single-hole multi-section time sequence blasting or multi-hole synchronous blasting modes. The application solves the problems of high energy consumption, complicated process and inability to perceive rock changes of the traditional device, greatly reduces the equipment cost and safety risk, and improves the efficiency and environmental protection of urban foundation pit excavation.

Description

Technical Field

[0001] This invention relates to the field of rock excavation technology, and in particular to a rock crushing device and method. Background Technology

[0002] With the acceleration of urbanization, the development of high-rise buildings and underground spaces is becoming increasingly in-depth, involving a large number of deep foundation pit projects. In areas with complex geological conditions, especially when encountering ultra-hard rock layers such as granite and quartzite, foundation pit excavation has become a key challenge restricting construction period, cost, and environmental friendliness. Currently, the following methods are mainly used for the excavation of foundation pits in ultra-hard rock, but all of them have significant limitations: (1) The combination of “excavator + breaker” is adopted. Although this technology is mature and the equipment is widely used, it has the problems of extremely low crushing efficiency and serious equipment wear when facing ultra-hard rock layers. In addition, the continuous high-decibel noise, high-frequency vibration and large amount of dust generated during construction seriously pollute the environment and are difficult to meet the requirements of modern urban green construction and environmental protection supervision. (2) Explosive blasting is a high-risk operation, which is subject to strict control in urban built-up areas. The shock wave from the blasting poses a safety hazard to the foundations of existing buildings and underground pipelines. The carbon dioxide gas blasting technology that has emerged in recent years is relatively safe, but its operating costs are high (it requires frequent replacement of vulnerable parts and filling with high-pressure gas). Furthermore, there are still safety risks in the transportation and storage of high-pressure gas, making it unsuitable for operations in densely populated urban areas. (3) Electro-pulse fracturing technology based on the electrohydraulic effect. This technology uses the shock wave generated by high-voltage discharge in water to break rocks, and has the advantages of no open flame and controllable vibration. However, existing electro-pulse drilling rigs and processes still have the following technical problems that urgently need to be solved when applied to foundation pit engineering: ① Existing equipment mostly adopts a split operation process of "drilling - water filling - electrode installation - discharge", which is time-consuming between processes and cannot achieve continuous operation of drilling and breaking at the same time; ②The traditional electrohydraulic effect relies on extremely high voltage and huge capacitor energy storage (usually around 3000kJ); this not only leads to the large size of the equipment and a sharp increase in the difficulty of electrical insulation design, but also significantly increases the manufacturing cost and maintenance threshold. ③ Existing technologies are mostly single-hole independent operations, which make it difficult to achieve coordinated crushing of large-area rock masses; at the same time, the blasting impact range mainly relies on manual experience to set, lacking precise control methods, which can easily lead to uneven crushing or energy waste, and pose uncontrollable safety risks. ④ Whether it is explosives, gas blasting or existing electrical pulse technology, most of them follow the thinking of mining, and only conduct rough geological surveys in the early stage. In fact, the hardness distribution of the rock strata in the foundation pit is extremely uneven in the longitudinal and transverse directions (the hardness changes drastically with a difference of a few meters). Existing technology cannot detect this change, and often adopts excessive energy output with a "one-size-fits-all" approach, which not only wastes energy, but also cannot guarantee the safety of precise construction in populated areas. Summary of the Invention

[0003] The purpose of this invention is to provide a rock crushing device and method to solve the problems existing in the prior art and avoid excessive energy output and energy waste during the excavation process.

[0004] To achieve the above objectives, the present invention provides the following solution: This invention provides a rock crushing device, comprising: A drilling device is used for drilling operations in rock formations; the drilling device is equipped with a monitoring unit for collecting operating parameters of the drilling device during the drilling operation, the operating parameters including at least drilling speed, drilling pressure, torque and rotational speed. A calculation and control module connected to the monitoring unit is used to calculate the rock layer hardness in real time based on the working condition parameters, and to calculate the target shock wave energy based on the rock layer hardness. An electric pulse fracturing module, comprising an energy storage unit and an electric blasting drill bit, wherein the energy storage unit is capable of receiving instructions from the computing and control module and releasing electrical energy to the electric blasting drill bit to generate a shock wave; The calculation and control module is also used to adjust the charging and discharging parameters of the energy storage unit according to the energy of the target shock wave, and control the electric pulse fracturing module to generate shock waves in the borehole to break the rock mass.

[0005] Preferably, the shock wave generating module further includes a multi-channel parallel output circuit, which is configured to discharge multiple energy storage units in parallel or in series to adapt to single-hole multi-section blasting or multi-hole synchronous blasting at different depths.

[0006] Preferably, the electro-explosive drill bit includes a first electrode, a second electrode, a metal wire, and an energetic projectile; The energetic projectile includes a shell and a solid-liquid mixture disposed within the shell. The solid-liquid mixture contains a liquid medium and aluminum powder, and the mass of the aluminum powder is 4% to 6% of the mass of the liquid medium. The metal wire penetrates the housing, a portion of the metal wire is in contact with the solid-liquid mixture, and both ends of the metal wire are located outside the housing; One end of the metal wire is electrically connected to the first electrode and the other end is electrically connected to the second electrode. The first electrode is electrically connected to the first terminal of the multiplexed parallel output circuit, and the second electrode is electrically connected to the second terminal of the multiplexed parallel output circuit. The first electrode and the second electrode are used to output the electrical energy stored in the energy storage element.

[0007] Preferably, the liquid medium is water or oil.

[0008] Preferably, the energy storage unit adopts a modularly designed capacitor bank, the single-bank capacity of which is less than or equal to 100kJ, and supports quick plug-and-play replacement.

[0009] Preferably, the metal wire is straight and coaxially arranged with the housing.

[0010] The present invention also provides a rock crushing method, based on the above-described rock crushing apparatus, comprising the following steps: S1. Survey the target rock strata in the area to be excavated and plan the location of the blast holes. S2. Drill boreholes in the target rock stratum and collect drilling parameters in real time, and calculate the hardness of the current rock stratum based on the drilling parameters using a preset algorithm. S3. Based on the hardness and borehole parameters, calculate the target shock wave pressure required to break the target rock layer, and calculate the discharge voltage and current parameters based on the target shock wave pressure. S4. Insert the electric blasting drill bit into the preset position in the blast hole, and charge the energy storage unit to the discharge voltage and current parameters; S5. Trigger electrode discharge, using the electrohydraulic effect or electro-explosive effect to generate shock waves to break rocks; S6. Manually assess the rock breaking effect. If it does not meet the standard, repeat steps S4-S5. If it meets the standard, move to the next blast hole.

[0011] Preferably, the blasting modes in step S5 include single-hole multi-section sequential blasting and multi-hole synchronous blasting; in single-hole multi-section sequential blasting, the discharge sequence of electrodes at different depths in the same borehole is controlled to make the generated shock waves superimposed inside the rock mass; in multi-hole synchronous blasting, the electrodes in multiple boreholes are controlled to discharge simultaneously.

[0012] Preferably, in step S2, the preset algorithm is constructed based on the mapping relationship between the rock drillability index and drilling pressure, rotation speed and torque.

[0013] Preferably, during the drilling process in step S2, the rotation speed of the drill rod is adjusted in real time according to the hardness of the current rock strata.

[0014] The present invention achieves the following technical effects compared to the prior art: The rock breaking device and method of this invention collects multi-dimensional parameters such as drilling speed, drilling pressure, and torque in real time during the drilling process. It uses a rock drillability model to invert the rock layer hardness in real time, and then calculates and determines the required target shock wave energy based on the rock layer hardness. This allows the target shock wave energy to be allocated as needed according to actual geological conditions. This not only avoids resource waste and seismic wave disturbance caused by excess energy in traditional methods, but also prevents secondary explosions due to insufficient energy. It is particularly suitable for scenarios with extremely high safety and disturbance control requirements, such as urban foundation pits. Furthermore, this invention introduces metal wires / energetic projectiles between electrodes and combines them with an energetic fluid medium (such as an aluminum powder mixture). Utilizing the composite enhancement effect of "chemical energy + electrical energy," the energy storage requirement of a single capacitor is reduced to 100kJ or less, significantly reducing energy consumption. This makes modular, quickly pluggable capacitor banks possible, eliminating the need for a large vehicle-mounted platform and significantly reducing manufacturing costs, maintenance difficulty, and operational hazards. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the rock crushing device of the present invention; Figure 2 This is a schematic diagram of the structure of the electric blasting drill bit in the rock breaking device of the present invention; In the diagram: 1. Drilling speed sensor; 2. Torque sensor; 3. Drill pressure sensor; 4. Displacement sensor; 5. Electro-explosive drill bit; 6. Energy storage unit; 7. Drilling device; 8. Housing; 9. Solid-liquid mixture; 10. Metal wire; 11. First electrode; 12. Second electrode. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The purpose of this invention is to provide a rock crushing device and method to solve the problems existing in the prior art and avoid excessive energy output and energy waste during the excavation process.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a rock crushing device, including: Drilling device 7 is used for drilling operations in rock formations; a monitoring unit is installed on drilling device 7, which is used to collect the working condition parameters of drilling device 7 during drilling operations, including at least drilling speed, drilling pressure, torque and rotation speed. The calculation and control module is connected to the monitoring unit signal. The calculation and control module is used to calculate the rock layer hardness in real time according to the working condition parameters, and to calculate the target shock wave energy according to the rock layer hardness. The electric pulse fracturing module includes an energy storage unit 6 and an electric blasting drill bit 5. The energy storage unit 6 can receive instructions from the computing control module and release electrical energy to the electric blasting drill bit 5 to generate a shock wave. The calculation and control module is also used to adjust the charging and discharging parameters of the energy storage unit 6 according to the target shock wave energy, and control the electric pulse fracturing module to generate shock waves in the borehole to break the rock mass.

[0021] In this embodiment, the monitoring unit specifically includes a drilling speed sensor 1, a drilling pressure sensor 3, a torque sensor 2, a rotational speed sensor, and a displacement sensor 4. The drilling speed sensor 1 is installed on the top of the drill pipe to monitor the feed speed of the drill pipe in real time. The drilling pressure sensor 3 is a hydraulic pressure sensor installed in the oil circuit of the feed cylinder to monitor the axial thrust. The torque sensor 2 is installed at the connection between the rotary motor and the drill pipe to monitor the rotational resistance torque. The rotational speed sensor monitors the output rotational speed of the drill bit, i.e., the rotational speed of the drill pipe. The displacement sensor 4 monitors the actual depth of the drill pipe.

[0022] The calculation and control module is preferably an industrial PC or PLC (Programmable Logic Controller). The calculation and control module has a built-in preset algorithm. In this embodiment, the calculation and control module uses formulas... Calculate the hardness of the rock strata, where R is the hardness of the rock strata in MPa; K is the drill bit coefficient, ranging from 0.8 to 1.2; T is the torque of the drill rod in Nm; D is the diameter of the drill rod in mm; and V is the drilling speed of the drill rod in mm / min. In this embodiment, the calculation control module uses formulas Calculate the target shock wave energy, where E is the target shock wave energy in kJ; η is the efficiency coefficient, ranging from 0.6 to 0.9; R is the rock hardness in MPa; and V is the borehole volume in m³. 3 The drill bit diameter is the borehole diameter d, the drilling depth is the actual depth of the drill rod h, and the borehole volume V is calculated using the following formula: The drill bit diameter is preset in the calculation and control module, and the borehole volume V is automatically calculated in real time by the calculation and control module during the drilling process; kf is the crushing degree coefficient, and the value of kf is 0.3, 1.0 or 2.5. When the value of kf is 0.3, the crushing degree is that cracks are generated but not broken. When the value of kf is 1.0, the crushing degree is that it is standard crushing and the block size is moderate. When the value of kf is 2.5, the crushing degree is that it is completely crushed into fine particles. It is worth noting that since the ratio of the solid-liquid mixture 9 in the energetic projectile body and the size of the shell 8 and the discharge parameters all affect the explosive energy that the energetic projectile can generate, in practical applications, the energy that different types of energetic projectiles can generate under different discharge parameters is obtained through pre-testing. During use, the charging and discharging parameters are selected based on the target shock wave energy, test data, and the specific model of the energetic projectile. The charging and discharging parameters that are closest to the target shock wave energy are selected, and the difference between the charging and discharging parameters that are closest to the target shock wave energy and the target shock wave energy needs to be within a preset range. In this embodiment, the selection of charging and discharging parameters is compiled into the calculation and control module and is automatically performed by the calculation and control module according to the program logic. Of course, in practical applications, the selection can also be performed manually according to the above logic, and then the charging and discharging parameters can be set.

[0023] In this embodiment, a down-the-hole drill is preferred as the drilling equipment.

[0024] In the optional scheme of this embodiment, more preferably, the shock wave generating module further includes a charging unit and a multi-parallel output circuit. The multi-parallel output circuit specifically includes an IGBT solid-state switch group and a transformer winding. The multi-parallel output circuit is configured to discharge multiple energy storage units 6 in parallel or in series to adapt to single-hole multi-section blasting or multi-hole synchronous blasting at different depths.

[0025] In a preferred embodiment, the electro-explosive drill bit includes a first electrode 11, a second electrode 12, a metal wire 10, and an energetic projectile. The energetic projectile includes a housing 8 and a solid-liquid mixture 9 disposed within the housing 8. The solid-liquid mixture 9 contains a liquid medium and aluminum powder, with the mass of the aluminum powder being 4% to 6% of the mass of the liquid medium. The metal wire 10 penetrates the housing 8, with a portion of the metal wire 10 in contact with the solid-liquid mixture 9, and both ends of the metal wire 10 located outside the housing 8. One end of the metal wire 10 is electrically connected to the first electrode 11, and the other end is electrically connected to the second electrode 12. The first electrode 11 is electrically connected to the first terminal of a multi-channel parallel output circuit, and the second electrode 12 is electrically connected to the second terminal of the multi-channel parallel output circuit. The first electrode 11 and the second electrode 12 are used to output the electrical energy stored in the energy storage element. After the multi-channel parallel output circuit discharges multiple energy storage units 6 in parallel or in series, it discharges the electrical energy of the multiple energy storage units to the metal wire 10 through the first electrode 11 and the second electrode 12.

[0026] In the optional embodiments of this invention, the preferred option is that the metal wire 10 is straight and coaxially arranged with the housing 8. Furthermore, the contact point between the metal wire 10 and the housing 8 is sealed to ensure the airtightness of the housing 8 and the ultra-high pressure environment inside the housing 8. The housing 8 is typically made of plastic to ensure it has sufficient strength and can break easily under internal pressure during discharge to release the shock wave. In practical applications, technicians can adapt the specific material of the housing 8 according to actual needs, as long as the above-mentioned usage requirements are met.

[0027] It is worth noting that the liquid medium within the solid-liquid mixture 9 needs to be insulating. In practical applications, the liquid medium can be water or oil. Since the pressure of the solid-liquid mixture 9 inside the shell 8 is ultra-high pressure, and water is also insulating under ultra-high pressure, this does not contradict the requirement that the liquid medium be insulating as mentioned above. During discharge, a short circuit occurs between the first electrode 11 and the second electrode 12 due to their direct connection via the metal wire 10. When the high-voltage current passes through the metal wire 10, it generates a large amount of heat, creating high temperature and high pressure within the shell 8 of the energetic projectile. This causes the solid-liquid mixture 9 inside the shell 8 to instantly vaporize and expand, causing the shell 8 to rupture and producing an "electric explosion" effect. Simultaneously, the high temperature and high pressure generated by the metal wire 10 also ignites the aluminum powder in the solid-liquid mixture 9, resulting in deflagration and forming a shock wave, which can also increase the energy of the shock wave generated by the energetic projectile.

[0028] The reaction mechanism is as follows: Electrical energy heats the metal wire 10, causing it to undergo a phase change explosion and generate a primary shock wave; the high-temperature plasma comes into contact with the aluminum powder, igniting the aluminum powder and causing a violent exothermic chemical reaction (4Al + 3O2 → 2Al2O3), releasing chemical energy and generating a secondary enhanced shock wave.

[0029] Experiments show that the peak pressure of the shock wave can be increased by 3-5 times through the composite reinforcement effect of "metal wire + aluminum powder", making it possible to replace the traditional 3000kJ capacitor with a small 100kJ capacitor. In addition to aluminum powder, magnesium powder, zirconium powder or their alloy powder can also be used as energetic additives, as long as they can undergo a violent oxidation reaction in the underwater high-voltage discharge environment.

[0030] In the optional solutions of this embodiment, the liquid medium is preferably water, mud, oil or other insulating liquid; water and mud are both considered insulators under ultra-high pressure environment, which can meet the usage requirements.

[0031] In the optional schemes of this embodiment, the preferred option is that the energy storage unit 6 adopts a modularly designed capacitor bank. Unlike the existing technology that requires a giant capacitor of 3000kJ, this embodiment uses a supercapacitor module with a single capacity of 100kJ. Multiple modules can be connected in parallel or in series and flexibly allocated according to the instructions of the calculation and control module 200.

[0032] Example 2 This embodiment provides a rock crushing method based on the rock crushing device of Embodiment 1, including the following steps: S1. Survey the target rock strata in the area to be excavated and plan the location of the blast holes. Based on the exposed lithology on the surface, make a preliminary plan for the array of blast holes. S2. Drill boreholes in the target rock stratum and collect drilling working parameters in real time. Then, calculate the hardness of the current rock stratum based on the working parameters using a preset algorithm, and record the hardness of the rock stratum corresponding to each depth of the borehole. S3. After drilling to the designed hole depth, the borehole is divided into sections according to hardness. The hardness deviation of the rock layer corresponding to each hole depth in the same section is within the preset range. Combined with the borehole parameters, the target shock wave pressure required to break the target rock layer is calculated, and the discharge voltage and current parameters are calculated based on the target shock wave pressure. S4. Place the electric blasting drill bit in the preset position inside the blast hole, that is, lower the electric blasting drill bit 5 to the set hole depth. Before lowering, connect the first electrode 11 in the electric blasting drill bit to the first end of the multi-parallel output circuit, connect the second electrode 12 to the second end of the multi-parallel output circuit, and charge the energy storage unit 6 to the discharge voltage and current parameters. S5. The calculation control module controls the multi-parallel output circuit to make the energy storage unit discharge through the first electrode 11 and the second electrode 12, and uses the liquid electro-electric effect or the electro-explosion effect to generate shock waves to break rocks. S6. Manually assess the rock breaking effect. If it does not meet the standard, repeat steps S4-S5. If it meets the standard, move to the next blast hole.

[0033] In the optional schemes of this embodiment, a preferred option is that the blasting mode in step S5 includes single-hole multi-section sequential blasting and multi-hole synchronous blasting. In single-hole multi-section sequential blasting, by controlling the discharge sequence of electrodes at different depths within the same borehole, the generated shock waves are superimposed within the rock mass. For example, the electric blasting drill bit 5 is positioned sequentially at depths of 7m and 9m, and the discharge is repeated. By controlling the discharge sequence (microsecond-level delay), the shock waves at each depth are superimposed within the rock mass, forming shear force and completely fracturing the hard rock interlayer. In multi-hole synchronous blasting, the electrodes in multiple boreholes are controlled to discharge simultaneously. For example, if the current area is homogeneous soft rock, the electrodes in four adjacent boreholes are controlled to discharge simultaneously, achieving large-area fracturing.

[0034] In the optional schemes of this embodiment, it is more preferred that in step S2, the preset algorithm is constructed based on the mapping relationship between the rock drillability index and drilling pressure, rotation speed and torque.

[0035] In the optional schemes of this embodiment, it is more preferred that during the drilling of the blast hole in step S2, the rotation speed of the drill rod is adjusted in real time according to the hardness of the current rock stratum. In practical applications, based on drilling experience and theoretical calculation results, the drilling parameters of the drilling rig are optimized when encountering rock strata of different hardness. For example, a high rotation speed is used when the hardness is low and a low rotation speed is used when the hardness is high, so as to improve the drilling efficiency of the drilling rig.

[0036] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A rock crushing device, characterized in that, include: A drilling device for drilling operations in rock formations; The drilling device is equipped with a monitoring unit, which is used to collect the operating parameters of the drilling device during the drilling operation. The operating parameters include at least drilling speed, drilling pressure, torque and rotation speed. A calculation and control module connected to the monitoring unit is used to calculate the rock layer hardness in real time based on the working condition parameters, and to calculate the target shock wave energy based on the rock layer hardness. An electric pulse fracturing module, comprising an energy storage unit and an electric blasting drill bit, wherein the energy storage unit is capable of receiving instructions from the computing and control module and releasing electrical energy to the electric blasting drill bit to generate a shock wave; The calculation and control module is also used to adjust the charging and discharging parameters of the energy storage unit according to the energy of the target shock wave, and control the electric pulse fracturing module to generate shock waves in the borehole to break the rock mass.

2. The rock crushing device according to claim 1, characterized in that: The shock wave generating module also includes a multi-channel parallel output circuit, which is configured to discharge multiple energy storage units in parallel or in series to adapt to single-hole multi-section blasting or multi-hole synchronous blasting at different depths.

3. The rock crushing device according to claim 2, characterized in that: The electro-explosive drill bit includes a first electrode, a second electrode, a metal wire, and an energetic projectile. The energetic projectile includes a shell and a solid-liquid mixture disposed within the shell. The solid-liquid mixture contains a liquid medium and aluminum powder, and the mass of the aluminum powder is 4% to 6% of the mass of the liquid medium. The metal wire penetrates the housing, a portion of the metal wire is in contact with the solid-liquid mixture, and both ends of the metal wire are located outside the housing; One end of the metal wire is electrically connected to the first electrode and the other end is electrically connected to the second electrode. The first electrode is electrically connected to the first terminal of the multiplexed parallel output circuit, and the second electrode is electrically connected to the second terminal of the multiplexed parallel output circuit. The first electrode and the second electrode are used to output the electrical energy stored in the energy storage element.

4. The rock crushing device according to claim 3, characterized in that: The liquid medium is water or oil.

5. The rock crushing device according to claim 1, characterized in that: The energy storage unit adopts a modularly designed capacitor bank, with a single capacitor bank capacity of less than or equal to 100kJ, and supports quick plug-and-play replacement.

6. The rock crushing device according to claim 3, characterized in that: The metal wire is straight and is coaxially arranged with the housing.

7. A rock crushing method, based on the rock crushing apparatus according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Survey the target rock strata in the area to be excavated and plan the location of the blast holes. S2. Drill boreholes in the target rock stratum and collect drilling parameters in real time, and calculate the hardness of the current rock stratum based on the drilling parameters using a preset algorithm. S3. Based on the hardness and borehole parameters, calculate the target shock wave pressure required to break the target rock layer, and calculate the discharge voltage and current parameters based on the target shock wave pressure. S4. Insert the electric blasting drill bit into the preset position in the blast hole, and charge the energy storage unit to the discharge voltage and current parameters; S5. Trigger electrode discharge, using the electrohydraulic effect or electro-explosive effect to generate shock waves to break rocks; S6. Manually assess the rock breaking effect. If it does not meet the standard, repeat steps S4-S5. If it meets the standard, move to the next blast hole.

8. The rock crushing method according to claim 7, characterized in that: The blasting modes in step S5 include single-hole multi-section sequential blasting and multi-hole synchronous blasting. In single-hole multi-section sequential blasting, the discharge sequence of electrodes at different depths within the same borehole is controlled to cause the generated shock waves to be superimposed inside the rock mass. In multi-hole synchronous blasting, electrodes in multiple boreholes are controlled to discharge simultaneously.

9. The rock crushing method according to claim 7, characterized in that: In step S2, the preset algorithm is constructed based on the mapping relationship between the rock drillability index and drilling pressure, rotation speed and torque.

10. The rock crushing method according to claim 7, characterized in that: During the drilling process in step S2, the rotation speed of the drill rod is adjusted in real time according to the hardness of the current rock strata.

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