A method for fracturing hard rock into blocky fragments and an impact fracturing device

Abstract

This invention provides a method and impact-type fracturing device for hard rock, relating to the field of engineering development technology. The method includes: forming multiple pre-splitting holes with small intervals along the outline of the working face at its edge; forming a larger central compensation hole at the center of the working face; dividing the area between the central compensation hole and each pre-splitting hole into multiple impact rock-breaking points; inducing rock-breaking at these points to create a continuous path that extends from the impact rock-breaking points towards the pre-splitting holes and the central compensation hole, and these paths become interconnected. By constructing a "pre-splitting weakening - central stress relief - multi-point synergistic impact" approach, controllable expansion and connection of the crack network at the working face are achieved, allowing the cracks to form stable continuous paths under weakened structural constraints. This method not only utilizes the central compensation hole for stress relief and induced stress redistribution, reducing the required rock-breaking capacity, but also results in a more uniform distribution of the continuous path, reducing the dispersion of rock block size.

Description

Technical Field

[0001] This invention relates to the field of underground engineering development technology, and in particular to a method for fracturing hard rock into blocky fragments and an impact-type fracturing device. Background Technology

[0002] In tunnel engineering, mine roadway and underground engineering construction, rock fracturing under hard rock conditions has always been a major factor restricting tunneling efficiency and construction safety. Existing hard rock tunneling methods mainly include drill-and-blast, mechanical cutting, and impact rock breaking. Among them, drill-and-blast, although highly adaptable, has problems such as large blasting vibration, strong disturbance to the surrounding rock, poor construction safety, and uncontrollable block size; mechanical cutting methods (such as TBMs and cantilever tunneling machines) have significantly reduced efficiency under high-strength, highly abrasive hard rock conditions, with severe equipment wear and poor economic efficiency; single impact rock breaking methods are significantly limited by free surface conditions, making it difficult to form a controllable crack network in intact hard rock, and the rock breaking effect is unstable.

[0003] In recent years, pre-splitting boreholes and pressure relief holes have gradually attracted attention as methods for rock breaking that artificially weaken the rock mass structure to guide crack propagation and improve rock breaking efficiency. Although this method improves rock breaking efficiency on a macroscopic level, it has not yet achieved the goal of safe, efficient, and precise rock breaking due to bottlenecks such as poor controllability of the crack network, high dispersion of rock block size, and high risk of secondary damage to the surrounding rock. Summary of the Invention

[0004] This invention provides a method for fracturing hard rock into blocks and an impact-type fracturing device, which aims to solve the problem of difficulty in precisely controlling the rock-breaking effect and improving the rock-breaking efficiency in the current hard rock tunneling process.

[0005] To achieve the above objectives, in one aspect, embodiments of the present invention provide a method for fracturing hard rock into massive fragments, comprising: S100. Multiple pre-splitting holes with small intervals are formed at the edge of the working face and arranged along the outline of the working face; S200. A large central compensation hole is formed at the center of the working face; S300. In the area between the central compensation hole and each pre-splitting hole, multiple impact rock-breaking points are divided. Rock breaking is performed on the impact rock-breaking points to induce the through path generated by rock breaking to extend from the impact rock-breaking points to the pre-splitting holes and the central compensation hole and connect with each other.

[0006] Preferably, the distance between adjacent pre-splitting holes is 3-5 times the diameter of the pre-splitting hole, and the hole depth is 0.8-1.2 times the single-cycle advance of the working face; The central compensation hole is located in the lower part of the center of the working face, and the hole depth is 0.8-1.2 times the single-cycle advance of the working face; The distance from the impact rock breaking point to the central compensation hole is 3-6 times the diameter of the central compensation hole, and the distance between adjacent impact rock breaking points is 0.15-0.45 times the width of the working face.

[0007] Preferably, in step S300, the rock-breaking point is impacted by synchronous impact or in sequence according to a preset time difference.

[0008] On the other hand, this application also provides an impact-type fracturing device applied to the aforementioned fracturing method, comprising: A vehicle, equipped with a rotating structure; Central pressure relief structure; Three multi-functional rock drilling structures are provided, and the multi-functional rock drilling structures and the central pressure relief structure are mounted on the carrier via the rotary structure. The multi-functional rock drilling structures include a pre-splitting drilling system and an impact rock breaking system. The pre-splitting drilling system is used to form a number of pre-splitting holes arranged in a ring at the outer edge of the working face, the central pressure relief structure is used to form a central compensation hole in the middle of the working face, and the impact rock breaking system breaks rock at a number of impact rock breaking points located between the pre-splitting holes and the central compensation hole.

[0009] Preferably, the multi-functional rock drilling structure further includes a first multi-axis robotic arm, the proximal end of which is disposed on the rotary structure, and the distal end of which is disposed of the pre-splitting drilling system and the impact rock breaking system. The pre-splitting drilling system and the impact rock breaking system act perpendicularly to the working face and move in a direction perpendicular to the working face.

[0010] Preferably, a main guide beam is fixed at the distal end of the first multi-axis robotic arm, the pre-splitting drilling system is slidably disposed on the main guide beam, and a groove is formed on the upper end surface of the main guide beam; The pre-splitting drilling system includes an execution slide table slidably disposed in a slide groove and a first linear module for driving the execution slide table to move. A drill bit drive module is disposed on the execution slide table and is connected to the drilling tool to drive the drilling tool to perform rotary motion. A drilling guide sleeve is also provided at the far end of the main beam, and the drilling tool passes through the drilling guide sleeve.

[0011] Preferably, the impact rock-breaking system includes an impact slide, which is disposed above the main guide beam and slidably connected to the side of the main guide beam and driven by a second linear module. A locking module is provided on the side of the impact slide to limit the relative position of the impact slide and the main guide beam. The impact slide is equipped with a pneumatic rock-breaking module.

[0012] Preferably, the pneumatic rock-breaking module adopts a reciprocating pneumatic rock-breaking machine, which includes an impact air distribution structure and a smooth truss structure. The smooth truss structure is located at the far end of the impact air distribution structure. The impact air distribution structure includes an air chamber and a piston slidably disposed in the air chamber. The piston has a piston rod on the side near the smooth truss structure, and the piston reciprocates within the air chamber. The smoothbore structure has a bore through which the piston rod passes. An electromagnetic system is provided at the distal end of the smoothbore structure. A magnetic sleeve is fixed to one side of the piston rod at the proximal end. The electromagnetic system is used to generate a repulsive force with the magnetic sleeve. An impact head is also fixed at the distal end of the piston rod.

[0013] Preferably, the central pressure relief structure includes a second multi-axis robotic arm, the proximal end of which is disposed on the rotary structure, and the distal end of which is provided with a roller cone drill. The above-described solution of the present invention has the following beneficial effects: The fracturing device and method provided in this application achieve controllable expansion and penetration of the crack network at the tunnel face by constructing a "pre-fracture weakening - central pressure relief - multi-point synergistic impact" approach. This allows the radial pre-fracture holes and central compensation holes generated by the synergistic impact to expand and connect with each other. Not only does the central compensation hole relieve pressure and induce stress redistribution during the synergistic impact, reducing the capacity required for rock breaking, but it also makes the penetration path distribution more uniform, reducing the block size dispersion of the rock.

[0014] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0015] Figure 1 This is a flowchart of the fragmentation method; Figure 2 This is a schematic diagram of the perforation pattern on the working face of the present invention; Figure 3 This is a schematic diagram of an impact crushing device; Figure 4 This is the front view of a multi-functional rock drilling structure; Figure 5 This is a left view of a multi-functional rock drilling structure.

[0016] [Explanation of Labels in the Attached Image] 1. Pre-splitting hole; 2. Central compensation hole; 3. Impact rock breaking point; 4. Through path; 100. Vehicle; 110. Rotating structure; 200. Central pressure relief structure; 300. Multifunctional rock drilling structure; 310. Pre-splitting drilling system; 311. Execution slide; 312. First linear module; 313. Drill bit drive module; 314. Drill guide sleeve; 320. Impact rock-breaking system; 321. Impact slide; 322. Second linear module; 323. Locking module; 324. Pneumatic rock-breaking module; 324a, air chamber; 324b, piston; 324c, piston rod; 324d, smoothbore structure; 324e, bore; 324f, electromagnetic system; 324g, magnetic sleeve; 324h, intake valve; 324j, pressure relief valve; 324k, spring; 324m, stepped surface; 325, impact head; 330. First multi-axis robotic arm; 331. Main guide beam; 340. Second multi-axis robotic arm; 341. Rotary cone drill. Detailed Implementation

[0017] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0018] like Figure 1 As shown, an embodiment of the present invention provides a method for fracturing hard rock into blocky fragments, which aims to fracture the working face so that the hard rock forms uniform blocky fragments, including the following steps: S100. Multiple pre-splitting holes 1 with small intervals are formed at the edge of the working face and arranged along the contour line of the working face; S200. A large central compensation hole 2 is formed at the center of the working face; S300. Multiple impact rock-breaking points 3 are divided in the area between the central compensation hole 2 and each pre-splitting hole 1. The impact rock-breaking points 3 are broken by synchronous impact or by a preset time difference sequence. The vibration frequency during rock breaking is close to the natural frequency of hard rock, thereby inducing the through path 4 generated during rock breaking to extend from the impact rock-breaking point 3 to the direction of the pre-splitting hole 1 and the central hole and to connect with each other to form cracks.

[0019] In this application, several pre-splitting holes 1 are arranged at the outer edge of the working face. Each pre-splitting hole 1 is equidistant from the edge of the working face, and the arrangement of the pre-splitting holes 1 is similar to the outline of the working face, generally forming a ring shape. The pre-splitting holes 1 can effectively control the outer boundary of crack propagation and prevent cracks from extending beyond the pre-splitting boundary during rock breaking. The central compensation hole 2 in the central region of the working face provides pressure relief space and induces the redistribution of in-situ stress. Under the constraint of the weakened structure formed by the central compensation hole 2 and the pre-splitting holes 1, when a high-speed impact load is applied to the impact rock breaking point 3, the cracks propagate and interpenetrate under the induction of the impact load and the control of the pre-set weakened structure, thereby achieving one-time overall blocky fragmentation of the rock at the working face and improving the controllability of rock fragmentation size. At the same time, the arrangement of the pre-splitting holes 1 reduces the transmission of impact load to the surrounding rock, effectively suppressing the disturbance of the surrounding rock. Meanwhile, by arranging multiple impact rock breaking points 3 inside the working face and implementing synchronous high-speed impact loading, the impact loads work synergistically in space and time, avoiding local excessive fragmentation or crack instability propagation caused by single-point impact, and improving the stability and predictability of the blocky fragmentation process.

[0020] Furthermore, the distance between adjacent pre-splitting holes 1 is 3-5 times the diameter of the pre-splitting hole 1, and the hole depth is 0.8-1.2 times the single-cycle advance of the working face.

[0021] The central compensation hole 2 is located in the lower part of the center of the working face, and the hole depth is 0.8-1.2 times the single-cycle advance of the working face; The distance from the impact rock breaking point 3 to the central compensation hole 2 is 3-6 times the diameter of the central compensation hole 2, and the spacing between adjacent impact rock breaking points 3 is 0.15-0.45 times the width of the working face.

[0022] In the above scheme, by limiting the diameter of each hole and the distance between the hole and the impact rock-breaking point 3, the penetration path 4 can be directionally extended towards the pre-splitting hole 1 and the central compensation hole 2, while controlling the uniformity of the broken pieces to avoid rock-breaking failure or excessive fragmentation. The penetration path 4 is jointly governed by the stress wave propagation law, the spatial stress concentration effect, and the mechanical properties of the rock itself. The expansion direction of the penetration path 4 is always towards the free surface, thus realizing the expansion of the penetration path 4 towards the central compensation hole 2 and the pre-splitting hole 1. The distance between the pre-splitting hole 1 and the impact rock-breaking point 3 determines the effective range of stress wave superposition. If the distance is too small, the stress waves converge too early, and the energy is excessively concentrated at the pre-splitting hole 1, resulting in the penetration path 4 being completed too early but with a limited range. If the distance is too large, the stress waves attenuate significantly, and effective stress superposition cannot be formed, resulting in the interruption of the expansion of the penetration path 4. The apertures of pre-cracked hole 1 and central compensation hole 2 affect the stress wave propagation characteristics and energy distribution. Larger apertures reduce the stress concentration effect on the hole wall but can accommodate more vibration energy; smaller apertures enhance the local stress gradient and promote the initiation of microcracks. The vibration frequency needs to be close to the resonant frequency of the rock to maximize energy input, but it is necessary to avoid excessively high frequencies that would result in excessively short stress wave pulses and reduced energy utilization.

[0023] To achieve the aforementioned rock-breaking method, this application also provides an impact-type fracturing device, such as... Figures 2-5 As shown, the system includes: a carrier 100, a multi-functional rock drilling structure 300, and a central pressure relief structure 200. The carrier 100 is used to mount the multi-functional rock drilling structure 300 and the central pressure relief structure 200. The carrier 100 can travel within a tunnel or roadway and stop at designated locations to support the multi-functional rock drilling structure 300 and the central pressure relief structure 200. A rotating structure 110 is provided on the carrier 100, which can rotate vertically.

[0024] The aforementioned multi-functional rock drilling structure 300 is provided in three parts. The multi-functional rock drilling structure 300 is installed on the rotary structure 110, so that the rotary structure 110 can drive the multi-functional rock drilling structure 300 to rotate in the vertical direction.

[0025] A central pressure relief structure 200 is provided. Similarly, the central pressure relief structure 200 is installed on the rotary structure 110, so that the rotary structure 110 can drive the central pressure relief structure 200 to rotate in the vertical direction.

[0026] In this application, the rotary structure 110 adopts an existing structure, such as the rotary table used in excavators in the prior art, which drives the upper part of the excavator to rotate.

[0027] The aforementioned multi-functional rock drilling structure 300 includes a pre-splitting drilling system 310 and an impact rock breaking system 320. The pre-splitting drilling system 310 is used to form multiple pre-splitting holes 1 that are similar to the outline of the working face at the outer edge of the working face. The central pressure relief structure 200 is used to form a central compensation hole 2 in the middle of the working face. The impact rock breaking system 320 breaks the rock at impact rock breaking points 3. Several impact rock breaking points 3 are provided and located between the pre-splitting holes 1 and the central compensation hole 2.

[0028] Furthermore, the aforementioned multi-functional rock drilling structure 300 also includes a first multi-axis robotic arm 330. The proximal end of the first multi-axis robotic arm 330 is fixed to the rotary structure 110, and the distal end is away from the rotary structure 110. The aforementioned pre-splitting drilling system 310 and impact rock breaking system 320 are arranged at the distal end of the first multi-axis robotic arm 330. The pre-splitting drilling system 310 and impact rock breaking system 320 can adjust their posture under the drive of the first multi-axis robotic arm 330, so that the pre-splitting drilling system 310 and impact rock breaking system 320 can move to any position in three-dimensional space and maintain a posture perpendicular to the working face.

[0029] The aforementioned pre-splitting drilling system 310 and impact rock breaking system 320 can move in the direction perpendicular to the working face. Specifically, the distal end of the first multi-axis robotic arm 330 is fixed with a main guide beam 331, and the pre-splitting drilling system 310 is slidably mounted on the main guide beam 331, so that the pre-splitting drilling system 310 can extend beyond the distal end of the main guide beam 331 when in use.

[0030] Specifically, a groove is formed on the upper end face of the main guide beam 331 along the length of the main guide beam 331. The pre-splitting drilling system 310 includes an execution slide 311 and a first linear module 312 that drives the execution slide 311 to move. The execution slide 311 is slidably mounted on the main guide beam 331 and slides in cooperation with the groove. The first linear module 312 pushes the execution slide 311 to move along the length of the main guide beam 331 by extension and retraction. A drill bit drive module 313 is provided at the distal end of the execution slide 311. The drill bit drive module 313 is connected to the drilling tool and drives the drilling tool to rotate.

[0031] Driven by the first multi-axis robotic arm 330, the drilling tool can be moved to any position on the working face, and under the push of the first linear module 312 and the drive of the drill tool drive module 313, it moves along the contour of the working face to form multiple pre-splitting holes 1.

[0032] Preferably, a drilling guide sleeve 314 is also provided at the far end of the main beam 331. The drilling tool passes through the drilling guide sleeve 314, which provides support and positioning for the drilling tool to prevent the drilling from tilting.

[0033] Furthermore, the impact rock breaking system 320 includes an impact slide 321, which is disposed above the main guide beam 331 and slidably connected to the side of the main guide beam 331. The impact slide 321 is connected to the main guide beam 331 through a second linear module 322, and under the extension and retraction of the second linear module 322, the impact slide 321 can move along the length direction of the main guide beam 331.

[0034] Preferably, a locking module 323 is provided on the side of the impact slide 321, which is used to limit the relative position of the impact slide 321 and the main guide beam 331. In this embodiment, the locking module 323 includes at least one locking hole formed on the side of the main guide beam 331, a through hole formed on the side of the impact slide 321, and a locking pin. When the locking pin is simultaneously inserted into the locking hole and the through hole, the locking pin can limit the relative position of the impact slide 321 and the main guide beam 331.

[0035] A pneumatic rock-breaking module 324 is installed on the impact slide 321. The pneumatic rock-breaking module 324 can periodically impact the working face, thereby applying periodic stress waves to the working face at the impact rock-breaking point 3.

[0036] In this embodiment, the pneumatic rock-breaking module 324 adopts a reciprocating pneumatic rock-breaking machine. The reciprocating pneumatic rock-breaking machine includes an impact air distribution structure and a smooth truss structure 324d. The smooth truss structure 324d is located at the far end of the impact air distribution structure. The impact air distribution structure includes an air chamber 324a and a piston 324b that is slidably disposed in the air chamber 324a and in close contact with the inner wall of the air chamber 324a. The piston 324b has a piston rod 324c on the side near the smooth truss structure 324d. The piston 324b can reciprocate within the air chamber 324a, thereby driving the piston rod 324c to move.

[0037] In this embodiment, piston 324b divides air chamber 324a into a left air chamber and a right air chamber, with the right air chamber located near the proximal end of the main guide beam 331. An inlet valve 324h and a pressure relief valve 324j are installed in the left air chamber. A spring 324k is installed in the right air chamber. When high-pressure gas is introduced through the inlet valve 324h, the high-pressure gas pushes piston 324b to the left. When the pressure relief valve 324j opens, the high-pressure gas is discharged from the left air chamber, and piston 324b moves to the right under the action of spring 324k. The periodic entry and exit of high-pressure gas drives piston 324b to reciprocate.

[0038] The aforementioned smoothbore structure 324d has a bore 324e, through which the aforementioned piston rod 324c partially passes. A magnetic sleeve 324g is fixed to the piston rod 324c near its proximal end. An electromagnetic system 324f is provided at the distal end of the bore 324e in the smoothbore structure 324d. A periodic direct current is supplied to the electromagnetic system 324f, and the frequency of the current is consistent with the reciprocating frequency of the piston 324b. When the piston rod 324c moves to the left, current flows through the electromagnetic system 324f, thereby generating a repulsive force between the magnetic sleeve 324g and the electromagnetic system 324f, increasing the kinetic energy of the piston rod 324c moving to the left. When the piston rod 324c moves to the right, no current flows through the electromagnetic system 324f, which helps the spring 324k push the piston 324b to the right.

[0039] An impact head 325 is also fixed at the distal end of the piston rod 324c.

[0040] Preferably, a stepped surface 324m is formed at the distal end of the bore 324e. The stepped surface 324m is used to cooperate with the impact head 325 to limit the movement and prevent the impact head 325 from dislodging from the smooth bore structure 324d when it moves to the left.

[0041] Preferably, an impact guide cylinder is also provided at the distal end of the bore 324e, which serves to support and position the impact head 325.

[0042] The aforementioned central pressure relief structure 200 includes a second multi-axis robotic arm 340, the proximal end of which is mounted on the rotary structure 110, and the distal end of which is mounted on a roller cone drill 341.

[0043] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for fracturing hard rock into massive fragments, characterized in that, include: S100. Multiple pre-splitting holes (1) with small intervals are formed at the edge of the working face and arranged along the outline of the working face. S200. A large central compensation hole (2) is formed at the center of the working face. S300. In the area between the central compensation hole (2) and each pre-splitting hole (1), multiple impact rock breaking points (3) are divided. Rock breaking is performed on the impact rock breaking points (3) to induce the through path (4) generated by rock breaking, which extends from the impact rock breaking points (3) to the pre-splitting holes (1) and the central compensation hole (2) and connects with each other.

2. The method for fracturing hard rock into massive fragments according to claim 1, characterized in that: The distance between adjacent pre-splitting holes (1) is 3-5 times the diameter of the pre-splitting hole (1), and the hole depth is 0.8-1.2 times the single-cycle advance of the face. The central compensation hole (2) is located in the lower part of the center of the working face, and the hole depth is 0.8-1.2 times the single-cycle advance of the working face; The distance from the impact rock breaking point (3) to the central compensation hole (2) is 3-6 times the diameter of the central compensation hole (2), and the distance between adjacent impact rock breaking points (3) is 0.15-0.45 times the width of the working face.

3. The method for fracturing hard rock into massive fragments according to claim 1, characterized in that: In step S300, the rock-breaking point (3) is impacted by synchronous impact or in sequence according to a preset time difference.

4. An impact-type fracturing device, applied to the fracturing method according to any one of claims 1-3, characterized in that, include: The vehicle (100) has a rotating structure (110) on it. Central pressure relief structure (200); Three multi-functional rock drilling structures (300) are mounted on the carrier (100) via the rotary structure (110) and the central pressure relief structure (200). The multi-functional rock drilling structure (300) includes a pre-splitting drilling system (310) and an impact rock breaking system (320). The pre-splitting drilling system (310) is used to form a number of pre-splitting holes (1) arranged in a ring on the outer edge of the working face, the central pressure relief structure (200) is used to form a central compensation hole (2) in the middle of the working face, and the impact rock breaking system (320) breaks rock at a number of impact rock breaking points (3) located between the pre-splitting holes (1) and the central compensation hole (2).

5. The impact-type fracturing device according to claim 4, characterized in that: The multi-functional rock drilling structure (300) also includes a first multi-axis robotic arm (330), the proximal end of which is mounted on the rotary structure (110), and the distal end of which is mounted on the pre-splitting drilling system (310) and the impact rock breaking system (320). The pre-splitting drilling system (310) and the impact rock breaking system (320) act perpendicularly to the working face and move along the direction perpendicular to the working face.

6. The impact-type fracturing device according to claim 5, characterized in that: The first multi-axis robotic arm (330) has a main guide beam (331) fixed at its distal end. The pre-splitting drilling system (310) is slidably mounted on the main guide beam (331). A groove is formed on the upper end face of the main guide beam (331). The pre-splitting drilling system (310) includes an execution slide (311) slidably disposed in a slide groove and a first linear module (312) for driving the execution slide (311) to move. A drill bit drive module (313) is disposed on the execution slide (311), and the drill bit drive module (313) is connected to the drilling tool to drive the drilling tool to perform rotary motion. A drilling guide sleeve (314) is also provided at the far end of the main beam (331), and the drilling tool passes through the drilling guide sleeve (314).

7. The impact-type fracturing device according to claim 6, characterized in that: The impact rock breaking system (320) includes an impact slide (321), which is disposed above the main guide beam (331) and slidably connected to the side of the main guide beam (331) and driven by a second linear module (322). A locking module (323) is provided on the side of the impact slide (321), which is used to limit the relative position of the impact slide (321) and the main guide beam (331). The impact slide (321) is equipped with a pneumatic rock-breaking module (324).

8. The impact-type fracturing device according to claim 7, characterized in that: The pneumatic rock-breaking module (324) adopts a reciprocating pneumatic rock-breaking machine. The reciprocating pneumatic rock-breaking machine includes an impact air distribution structure and a smooth truss structure (324d). The smooth truss structure (324d) is located at the far end of the impact air distribution structure. The impact air distribution structure includes an air chamber (324a) and a piston (324b) slidably disposed in the air chamber (324a). The piston (324b) is provided with a piston rod (324c) on the side near the smooth truss structure (324d). The piston (324b) reciprocates within the air chamber (324a). The smoothbore structure (324d) has a bore (324e) through which the piston rod (324c) passes. An electromagnetic system (324f) is provided at the distal end of the smoothbore structure (324d) in the bore (324e). A magnetic sleeve (324g) is fixed on one side of the piston rod (324c) at the proximal end. The electromagnetic system (324f) is used to generate a repulsive force with the magnetic sleeve (324g). An impact head (325) is also fixed at the distal end of the piston rod (324c).

9. The impact-type fracturing device according to claim 4, characterized in that: The central pressure relief structure (200) includes a second multi-axis robotic arm (340), the proximal end of which is disposed on the rotary structure (110), and the distal end of which is disposed of a roller cone drill (341).

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