Device and method for jointly breaking rock by projectile penetration and explosion and mechanical cutter

Abstract

The present invention provides a device and method for combined rock breaking using projectile blasting and mechanical cutters. The device is used to break the rock face, and comprises: a frame; a blasting assembly, the blasting assembly being disposed within the frame, the blasting assembly comprising a barrel, the barrel being positioned at a first preset position facing the face for performing the blasting action; and a mechanical rock breaking assembly, the mechanical rock breaking assembly being disposed at one end of the frame, the mechanical rock breaking assembly comprising several rotating rock breaking arms, the plurality of rotating rock breaking arms being positioned at a second preset position facing the face for performing the rotary crushing action. After the blasting assembly performs the blasting action at the first preset position, the mechanical rock breaking assembly performs the rotary crushing action at the second preset position to jointly crush the face. By means of the above method, a sufficient and good rock breaking effect can be achieved for hard and extremely hard rock.

Description

Technical Field

[0001] The present invention belongs to the technical field of rock breaking, and in particular relates to a device and method for rock breaking by combining projectile blasting with a mechanical cutter. Background Art

[0002] With economic development, my country's underground space engineering projects are increasing rapidly. In particular, the Sichuan-Tibet Railway represents a series of long tunnel clusters, as well as large-scale deep-buried mine tunnels and diversion tunnels. This has led to an increasing demand for construction projects, such as these. This has brought with it increasingly complex geological structures and engineering challenges. For decades, tunneling technologies, such as drill-and-blast and tunnel boring machines (TBMs), have been widely used at various underground space construction sites. However, facing complex and changing geological environments and the need for efficient construction, traditional rock breaking technologies are gradually facing new challenges. In recent years, a variety of new technologies and methods for rapid rock excavation have emerged, including laser radiation, microwave processing, liquid nitrogen freezing, water jets, and electron beams. These technologies have created new possibilities for improving tunnel excavation efficiency. However, when excavating hard and extremely hard rock, conventional technologies struggle to effectively break the rock mass, and these new technologies have not yet reached a stage where they can be applied.

[0003] That is, for the excavation of hard rock and extremely hard rock, the existing technology still has the technical disadvantages of insufficient rock crushing or poor crushing effect;

[0004] It can be seen that for the excavation of hard rock and extremely hard rock, how to fully crush the rock mass and improve the crushing effect are technical problems that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] The present invention provides a device for combining projectile blasting with mechanical cutters to break rock, which at least solves the above technical problems.

[0006] In order to solve the above problems, the first aspect of the present invention provides a device for combined rock breaking of projectile blasting and mechanical cutters, wherein the device is used to crush the rock face, and the device includes: a frame; a blasting assembly, wherein the blasting assembly is arranged in the frame, the blasting assembly includes a barrel, and the barrel is facing a first preset position of the face for performing a blasting action; a mechanical rock breaking assembly, wherein the mechanical rock breaking assembly is arranged at one end of the frame, and the mechanical rock breaking assembly includes several rotating rock breaking arms, and several of the rotating rock breaking arms are facing a second preset position of the face for performing a rotary crushing action; wherein, after the blasting assembly performs the blasting action on the first preset position, the mechanical rock breaking assembly performs a rotary crushing action on the second preset position to jointly crush the face.

[0007] In the first aspect, the mechanical rock breaking assembly further comprises: a rotating part and a rotating drive part, wherein the output end of the rotating drive part is connected to the rotating part for driving the rotating part to rotate, and a plurality of rotating rock breaking arms are circumferentially arranged at the end of the rotating part; wherein the axis of the rotating part is coaxially arranged with the barrel, and the rotation diameter of the rotating part is larger than the diameter of the barrel.

[0008] In the first aspect, a roller cutter is further provided at the end of the rotary rock breaking arm.

[0009] In the first aspect, the device further includes: a rake bucket and a belt conveyor; the rake bucket is arranged at the end of the frame close to the tunnel face, and the rake bucket is used to receive fragments dropped after the blasting assembly and the mechanical rock breaking assembly crush the tunnel face; the belt input end of the belt conveyor is connected to the rake bucket, and is used to transport the fragments received by the rake bucket to the output end of the belt conveyor.

[0010] In the first aspect, the device further comprises: a plurality of crab claws, wherein the plurality of crab claws are rotatably arranged inside and outside the rake bucket, and are used to rotate the fragments transferred into the rake bucket and input them into the inner side of the rake bucket; each of the crab claws comprises: a basic rotating part and a plurality of teeth, wherein the basic rotating part is rotatably arranged in the rake bucket, and the plurality of teeth are arranged on the periphery of the basic rotating part, and are used to rotate synchronously with the basic rotating part.

[0011] In the first aspect, the device further comprises: a plurality of gripper shoes, wherein the plurality of gripper shoes are arranged below the frame.

[0012] In the first aspect, the device further comprises: a propulsion cylinder, which is arranged on the frame, and the output end of the propulsion cylinder is connected to the end of the rotary drive unit away from the tunnel face, for propelling the rotary drive unit to move toward the tunnel face.

[0013] In the first aspect, the device further includes: a first hydraulic cylinder and a second hydraulic cylinder; the first hydraulic cylinder and the second hydraulic cylinder are correspondingly arranged on opposite side walls of the frame in the upper and lower directions, and are used to adjust the height of the frame.

[0014] In the first aspect, the device further includes: a plurality of mechanical locks; the plurality of mechanical locks are correspondingly arranged at the end connection positions of the plurality of rotating rock-breaking arms and the rotating part, for correspondingly adjusting the angles between the plurality of rotating rock-breaking arms and the rotating part.

[0015] In a second aspect, the present invention provides a method for rock breaking by combining projectile blasting and mechanical tools, the method being applied to any one of the devices for rock breaking by combining projectile blasting and mechanical tools, the device comprising a blasting component and a mechanical rock breaking component, the method comprising: blasting a first preset position of a tunnel face by the blasting component; the blasting of the first preset position of the tunnel face by the blasting component comprising setting a target point on the tunnel face, and blasting the target point position of the tunnel face by the blasting component with a shell; blasting a second preset position of the tunnel face by the mechanical rock breaking component, the blasting of the second preset position of the tunnel face by the mechanical rock breaking component comprising: circumferential crushing along the periphery of the target point after blasting by the mechanical rock breaking component.

[0016] In a second aspect, the device includes a belt conveyor, and the method further includes: after the blasting assembly and the mechanical rock breaking assembly crush the tunnel face, conveying the crushed fragments out by the belt conveyor.

[0017] Beneficial effect: The present invention proposes a device for rock breaking by combining projectile blasting and mechanical cutters, wherein a blasting action is performed on a first preset position of a tunnel face through a blasting component to form a first crushing area at the first preset position of the tunnel face, and then a rotational rock breaking action is performed on a second preset position of the tunnel face through a mechanical rock breaking component to form a second crushing area at the second preset position of the tunnel face, and a sufficient crushing environment is formed on the tunnel face by combining the first crushing area with the second crushing area; in summary, the tunnel face is jointly broken by combining the blasting component and the mechanical rock breaking component to achieve a sufficient and efficient rock breaking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a device for combined rock breaking using projectile blasting and mechanical cutters in a first embodiment of the present invention;

[0020] Figure 2 For the present invention Figure 1 Structural diagram of the perspective marked L.

[0021] Figure 3 Schematic diagram of the structure of the hob in the first embodiment of the present invention;

[0022] Figure 4Schematic diagram of the structure of the mechanical lock in the first embodiment of the present invention;

[0023] Figure 5 This is a schematic structural diagram of a crab claw in Example 1 of the present invention;

[0024] Figure 6 Schematic diagram of the tunnel face in the first embodiment of the present invention after it is first blasted by the blasting assembly in the initial state and then broken by the mechanical rock breaking assembly Figure 1 ;

[0025] Figure 7 Schematic diagram of the tunnel face in the first embodiment of the present invention after it is first blasted by the blasting assembly in the initial state and then broken by the mechanical rock breaking assembly Figure 2 ;

[0026] Description of reference numerals:

[0027] 1. Frame;

[0028] 2. Blasting components;

[0029] 201, barrel;

[0030] 202, loading department;

[0031] 3. Mechanical rock breaking components;

[0032] 301. Rotating to break the rock wall;

[0033] 302, rotation drive unit;

[0034] 303, rotating part;

[0035] 4. Palm surface;

[0036] 5. Rake bucket;

[0037] 6. Belt conveyor;

[0038] 7. Propulsion cylinder;

[0039] 8. The first hydraulic cylinder;

[0040] 9. Stretcher boots;

[0041] 10. Rear support;

[0042] 11. Hob;

[0043] 12. Crab claws;

[0044] 1201, basic rotating part;

[0045] 1202, tooth;

[0046] 13. Mechanical lock;

[0047] 14. Second hydraulic cylinder. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0049] At the same time, in the embodiments of this specification, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of this specification are for illustrative purposes only and are not intended to limit the present invention.

[0050] Example 1:

[0051] like Figure 1-7 As shown, the first embodiment provides a device for rock breaking by combining projectile blasting and mechanical cutters, which is used to break the rock face 4. The device includes: a frame 1, a blasting component 2 and a mechanical rock breaking component 3.

[0052] Among them, the blasting assembly 2 is arranged in the frame 1, and the blasting assembly 2 includes a barrel 201, which is facing the first preset position of the tunnel face 4 and is used to perform a blasting action; the mechanical rock breaking assembly 3 is arranged at one end of the frame 1, and the mechanical rock breaking assembly 3 includes several rotating rock breaking arms 301, and several rotating rock breaking arms 301 are facing the second preset position of the tunnel face 4 and are used to perform a rotary crushing action; wherein, after the blasting assembly 2 performs the blasting action on the first preset position, the mechanical rock breaking assembly 3 performs a rotary crushing action on the second preset position to jointly crush the tunnel face 4.

[0053] Specifically, the blasting assembly 2 is used to perform a blasting action on the first preset position of the tunnel face 4 to form a first crushing area at the first preset position of the tunnel face 4. Then, the mechanical rock breaking assembly 3 is used to perform a rotational rock breaking action on the second preset position of the tunnel face 4 to form a second crushing area at the second preset position of the tunnel face 4. By combining the first crushing area with the second crushing area, a sufficient crushing environment is formed for the tunnel face 4. In summary, the tunnel face 4 is combined with the blasting assembly 2 and the mechanical rock breaking assembly 3 to achieve a sufficient and efficient rock breaking effect. It should be noted that the barrel 201 is a high-strength rifled barrel, and the barrel is connected to the shell loading unit 202, which is loaded with projectiles for blasting.

[0054] Please continue reading Figure 6-Figure 7 , which are schematic diagrams of the two states of the tunnel face after it is first blasted by the blasting assembly in the initial state and then broken by the mechanical rock breaking assembly;

[0055] In some possible embodiments, the mechanical rock breaking assembly 3 further includes: a rotating portion 303 and a rotating drive portion 302, wherein the output end of the rotating drive portion 302 is connected to the rotating portion 303 for driving the rotating portion 303 to rotate, and a plurality of rotating rock breaking arms 301 are circumferentially arranged at the end of the rotating portion 303; wherein the axis of the rotating portion 303 is coaxial with the barrel 201, and the rotating diameter of the rotating portion 303 is larger than the diameter of the barrel 201;

[0056] In this way, the rotating part 303 can be driven to rotate by the rotating driving part 302, so as to drive the rotating rock-breaking arm 301 arranged at the end of the rotating part 303 to rotate, and during the rotation, it rubs against the tunnel face 4, thereby achieving the purpose of rock breaking. Among them, the axis of the rotating part 303 is arranged coaxially with the barrel 201, so that when the hole is fired at the tunnel face 4, the rotating rock-breaking arm 301 arranged at the end of the rotating part 303 can rotate and crush around the axis position, thereby achieving the technical purpose of fully breaking the rock.

[0057] In some possible implementations, a roller cutter 11 is further provided at the end of the rotating rock breaking arm 301;

[0058] This is to deepen the cutting force of the disc cutter 11 on the tunnel face 4, so as to achieve the cutting effect on hard rock and extremely hard rock.

[0059] In some possible embodiments, the device further includes: a rake bucket 5 and a belt conveyor 6; the rake bucket 5 is disposed at the end of the frame 1 near the tunnel face 4, and the rake bucket 5 is used to receive fragments dropped after the blasting assembly 2 and the mechanical rock breaking assembly 3 crush the tunnel face 4; the belt input end of the belt conveyor 6 is connected to the rake bucket 5, and is used to convey the fragments received by the rake bucket 5 to the output end of the belt conveyor 6;

[0060] In order to prevent the formation of excessive gravel accumulation after the tunnel face 4 is crushed, thereby affecting the rock breaking process, a rake bucket 5 is set at the end of the frame 1 close to the tunnel face 4. When the tunnel face 4 is crushed, the rock fragments will naturally fall into the rake bucket 5, and then the gravel will be transported to the outside through the belt conveyor 6, so as to prevent the formation of a large amount of gravel accumulation after the tunnel face 4 is crushed, thereby affecting the entire crushing process.

[0061] In some possible embodiments, the device further includes: a plurality of crab claws 12, which are rotatably disposed inside and outside the rake bucket 5 and are used to rotate and input debris that falls into the rake bucket 5 into the inside of the rake bucket 5; each crab claw 12 includes: a basic rotating portion 1201 and a plurality of teeth 1202, the basic rotating portion 1201 is rotatably disposed in the rake bucket 5, and the plurality of teeth 1202 are arranged on the outer periphery of the basic rotating portion 1201 and are used to rotate synchronously with the basic rotating portion 1201;

[0062] When the crushed gravel falls into the rake bucket 5, in order to prevent the gravel from accumulating at the falling position of the rake bucket 5 and to promptly transport the gravel in the rake bucket 5 from the falling end to the inner side of the rake bucket 5 for outward output, this embodiment 1 proposes an implementation method: that is, a plurality of rotatable crab claws 12 are provided at the falling end (inside and outside the rake bucket 5) in the rake bucket 5. During the falling process, the crushed gravel is continuously transported to the rotation direction of the crab claws 12, that is, the direction of the inner side of the rake bucket 5, through the rotation of the crab claws 12; thereby avoiding the disadvantage of the gravel accumulating at the falling end.

[0063] In some possible embodiments, the device further comprises: a plurality of grippers 9, wherein the plurality of grippers 9 are arranged below the frame 1;

[0064] When the device reaches the preset rock-breaking position, in order to maintain a stable rock-breaking state of the device, support shoes 9 are provided below the frame 1 to support the frame 1 and keep the frame 1 in a stable state.

[0065] In some possible embodiments, the device further includes: a propulsion cylinder 7, which is arranged on the frame 1, and the output end of the propulsion cylinder 7 is connected to the end of the rotary drive unit 302 away from the tunnel face 4, for propelling the rotary drive unit 302 to move toward the tunnel face 4.

[0066] During the rock breaking process, after the face 4 at one position is crushed in stages, the device needs to be steadily advanced to continuously crush the face 4 at a deeper level. By setting a propulsion cylinder 7 at the end of the rotary drive unit 302 away from the face 4, the device can be moved by the propulsion of the propulsion cylinder 7 when it is necessary to advance the device.

[0067] In some possible embodiments, the device further includes: a first hydraulic cylinder 8 and a second hydraulic cylinder 14; output ends of the first hydraulic cylinder 8 and the second hydraulic cylinder 14 are correspondingly arranged on opposite side walls in the upper and lower directions of the frame 1, and ends of the first hydraulic cylinder and the second hydraulic cylinder away from the output ends are arranged on the side walls of the rock structure for adjusting the height of the frame 1;

[0068] In order to adjust the height of the device, a first oil cylinder and a second oil cylinder are arranged on opposite side walls in the upper and lower directions of the frame 1. When the height of the device needs to be adjusted, the first oil cylinder or the second oil cylinder arranged below the frame 1 is advanced or retracted, and correspondingly, the first oil cylinder or the second oil cylinder arranged above the frame 1 is synchronously advanced or retracted to adjust the height of the device.

[0069] In some possible embodiments, the device further includes: a plurality of mechanical locks 13; the plurality of mechanical locks 13 are correspondingly provided at the end connection positions of the plurality of rotating rock breaking arms 301 and the rotating portion 303, and are used to correspondingly adjust the angles between the plurality of rotating rock breaking arms 301 and the rotating portion 303;

[0070] When rotating the rock breaking arm 301 to perform rotary rock breaking, it is necessary to consider the optimal rotary rock breaking angle, that is, it is necessary to make each rotary rock breaking arm 301 fit into the tunnel face 4. Based on this, the rotating part 303 of the rotary rock breaking arm 301 is set to an adjustable angle connection mode by means of a mechanical lock 13 to solve the above problem.

[0071] In summary, the rock breaking is performed by the above-mentioned device. This embodiment 1 proposes an implementation method, which includes:

[0072] S1. Align the device combining projectile blasting and mechanical cutter rock breaking with the hole to be excavated (i.e., the tunnel face);

[0073] S2. Fix the frame of the device, start the device, and make it advance one stroke. The specific process is: load the shells into the loading part of the rapid-explosion armor-piercing projectile, start the shell launching device, and fire the shells from the high-strength rifled barrel to hit the pre-set target position; then adjust the angle between the rotating rock-breaking arm and the tunnel face in the direction perpendicular to the tunnel face. After the adjustment is completed, use the mechanical locking device to lock the rotating rock-breaking arm at this angle, and use the telescopic function of the rotating rock-breaking arm to make the blade at the end of the arm closely contact the tunnel face; use the rotary drive device to rotate the rotating device installed on the outside of the high-strength rifled barrel, thereby driving the mechanical rock-breaking assembly to rotate; advance The hydraulic cylinder applies thrust toward the tunnel face, slowly pushing the device forward and advancing, supported by the rear support 10. a. The blades mounted on the rotary rock-breaking arm are locked in place by the cutter mounting structure, causing the rotary rock-breaking assembly to rotate, crushing the rock and causing rock debris to avalanche. (b. The blades mounted on the rotary rock-breaking arm, driven by the cutter mounting structure, move radially on the rotary rock-breaking assembly, simultaneously rotating with the plastic mechanical rock-breaking surface, crushing the rock and causing rock debris to avalanche.) The avalanched rock debris falls to the bottom of the tunnel under its own weight, where it is shoveled by a bucket onto a belt conveyor and finally unloaded at the rear of the machine. Each stroke of the thrust cylinder causes the plastic mechanical rock-breaking structure and its connected components to move forward one stroke.

[0074] S3. Repeat steps S1-S2 to start the next trip operation until the excavation reaches the specified distance, that is, the excavation is completed.

[0075] It should be noted that: during the above-mentioned excavation process, the anchor rods inside the rock mass and the complete excavation surface support are tightly connected together through the connecting device, the impact resistance of the surface support is used to avoid damage to the rock mass, and the bearing capacity of the anchor rods is used to bear the load of the impact surface system to ensure the systematic nature of the support.

[0076] Example 2:

[0077] Embodiment 2 of the present invention proposes a method for rock breaking by combining projectile blasting and mechanical tools. The method is applied to the above-mentioned device for rock breaking by combining projectile blasting and mechanical tools. The device includes a blasting component and a mechanical rock breaking component. The method includes: blasting a first preset position of the tunnel face by the blasting component; blasting the first preset position of the tunnel face by the blasting component includes setting a target point on the tunnel face, and blasting the target position of the tunnel face with a shell by the blasting component; blasting the second preset position of the tunnel face by the mechanical rock breaking component, and blasting the second preset position of the tunnel face by the mechanical rock breaking component includes: circumferential crushing along the target position after blasting by the mechanical rock breaking component.

[0078] Furthermore, the device also includes a belt conveyor. Based on this, after the blasting component and the mechanical rock breaking component crush the tunnel face, the crushed fragments are transported out through the belt conveyor.

[0079] Since the second embodiment and the first embodiment are embodiments of the same inventive concept and some of their structures are exactly the same, the structures in the second embodiment that are essentially the same as those in the first embodiment will not be elaborated in detail. For the parts not described in detail, please refer to the first embodiment.

[0080] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. However, these modifications, changes, or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present invention. They should all be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

[0081] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A device for combining projectile blasting with mechanical cutters to break rock, the device being used to break rock faces, characterized in that: The device comprises: frame; a blasting assembly, the blasting assembly being disposed in the frame, the blasting assembly comprising a barrel, the barrel being located at a first preset position facing the tunnel face and being used to perform a blasting action; a mechanical rock-breaking assembly, the mechanical rock-breaking assembly being disposed at one end of the frame, the mechanical rock-breaking assembly including several rotating rock-breaking arms, wherein several of the rotating rock-breaking arms are located at a second preset position facing the tunnel face and are configured to perform a rotational crushing action; wherein, after the blasting assembly performs a blasting action on the first preset position, the mechanical rock breaking assembly performs a rotational crushing action on the second preset position to perform combined crushing on the tunnel face; The mechanical rock breaking assembly further comprises: A rotating part and a rotating driving part, wherein the output end of the rotating driving part is connected to the rotating part for driving the rotating part to rotate, and a plurality of rotating rock breaking arms are circumferentially arranged at the end of the rotating part; The axis of the rotating part is coaxial with the barrel, and the rotating diameter of the rotating part is larger than the diameter of the barrel.

2. The device for combined rock breaking by projectile blasting and mechanical cutter according to claim 1 is characterized in that: A roller cutter is also provided at the end of the rotary rock breaking arm.

3. The device for rock breaking by combining projectile blasting and mechanical cutter according to claim 1 is characterized in that: The device further comprises: Rake bucket and belt conveyor; The rake bucket is arranged at the end of the frame close to the tunnel face, and the rake bucket is used to receive the fragments dropped after the tunnel face is broken by the blasting assembly and the mechanical rock breaking assembly; The belt input end of the belt conveyor is connected to the rake bucket for conveying the fragments received by the rake bucket to the output end of the belt conveyor.

4. The device for combined rock breaking by projectile blasting and mechanical cutter according to claim 3 is characterized in that: The device further comprises: A plurality of crab claws are rotatably arranged inside and outside the rake bucket, and are used to rotate the fragments that fall into the rake bucket and input them into the inner side of the rake bucket; each of the crab claws includes: a basic rotating part and a plurality of teeth, the basic rotating part is rotatably arranged in the rake bucket, and the plurality of teeth are arranged on the periphery of the basic rotating part, and are used to rotate synchronously with the basic rotating part.

5. The device for rock breaking by combining projectile blasting and mechanical cutter according to claim 1 is characterized in that: The device further comprises: A plurality of gripper shoes are arranged below the frame.

6. The device for combined rock breaking by projectile blasting and mechanical cutter according to claim 1 is characterized in that: The device further comprises: A propulsion cylinder is provided on the frame, wherein the output end of the propulsion cylinder is connected to an end of the rotary drive unit away from the tunnel face, and is used to propel the rotary drive unit to move toward the tunnel face.

7. The device for combined rock breaking by projectile blasting and mechanical cutter according to claim 1 is characterized in that: The device further comprises: The first hydraulic cylinder and the second hydraulic cylinder; the output ends of the first hydraulic cylinder and the second hydraulic cylinder are correspondingly arranged on the opposite side walls of the frame in the upper and lower directions, and the other ends of the first hydraulic cylinder and the second hydraulic cylinder are arranged on the rock walls on the corresponding sides.

8. The device for combined rock breaking by projectile blasting and mechanical cutter according to claim 1 is characterized in that: The device also includes: a number of mechanical locks; The mechanical locks are correspondingly arranged at the end connection positions of the rotating rock-breaking arms and the rotating part, and are used to correspondingly adjust the angles between the rotating rock-breaking arms and the rotating part.

9. A method for rock breaking by combining projectile blasting and mechanical cutters, the method being applied to the device for rock breaking by combining projectile blasting and mechanical cutters as claimed in any one of claims 1 to 8, the device comprising a blasting component and a mechanical rock breaking component, characterized in that: The method comprises: Blasting a first preset position of the tunnel face by using a blasting assembly; blasting the first preset position of the tunnel face by using a blasting assembly includes setting a target point on the tunnel face and blasting the target point position of the tunnel face by using a blasting assembly; Blasting the second preset position of the tunnel face by a mechanical rock-breaking assembly includes: circumferentially crushing the target position after blasting by the mechanical rock-breaking assembly.

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