Liquid oxygen phase change fracturing device and rock drilling and blasting process

Abstract

The application relates to a liquid oxygen phase change fracturing device and a rock drilling and blasting process, and relates to the technical field of blasting. The liquid oxygen phase change fracturing device comprises a vehicle body, a movable structure and a conversion structure. The movable structure is arranged on one side of the vehicle body and comprises a telescopic arm and a rotating base. One end of the telescopic arm is rotationally connected with the vehicle body, and the other end of the telescopic arm is rotationally connected with the rotating base. The conversion structure comprises a base, a conversion head and a first driving piece. The base is installed on the rotating base, the conversion head is rotationally connected with the base, and the conversion head is provided with a first mounting hole and a second mounting hole. A drill bit is arranged in the first mounting hole, and a fracturing pipe is arranged in the second mounting hole. The first driving piece is installed on the base and used for driving the drill bit or the fracturing pipe to move. The liquid oxygen phase change fracturing device is combined with drilling and explosion, and is used for tunneling in a mine, so that the tunneling efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of blasting technology, and in particular to a liquid oxygen phase change fracturing device and a rock drilling blasting process. Background Technology

[0002] A rock drilling rig is a type of heavy machinery widely used in mining, tunneling, and water conservancy projects. Its main function is to drill holes in rock using a drill bit, thereby achieving rock breaking and excavation. A rock drilling rig mainly consists of a drill bit and a robotic arm. During excavation, the location to be excavated is first measured and marked. Then, the robotic arm moves, driving the drill bit to the excavation point, where the drill bit begins drilling.

[0003] Due to the hardness and complexity of the rock, drill bits are prone to wear during operation, and the efficiency of drill bit excavation is relatively low. As a result, a process combining drilling and blasting has been developed. This involves first drilling a hole at the location to be excavated, and then installing blasting media (such as explosives, fracturing tubes, etc.) into the hole for blasting. This method has improved the efficiency of traditional drill bit excavation methods to a certain extent.

[0004] However, during the tunneling process, since the drilling rig is only equipped with a drill bit, it cannot undertake the task of installing the blasting medium into the hole. After drilling is completed, additional equipment is required to install the blasting medium into the hole, and the equipment needs to be replaced and the work is carried out in stages, which increases the working time and the tunneling efficiency needs to be further improved. Summary of the Invention

[0005] The purpose of this invention is to provide a liquid oxygen phase change fracturing device that can simultaneously perform drilling and blasting operations using a single device, effectively improving tunneling efficiency.

[0006] Firstly, the liquid oxygen phase change fracturing device provided by the present invention adopts the following technical solution: A liquid oxygen phase change fracturing device includes a vehicle body, a movable structure, and a conversion structure. The movable structure is disposed on one side of the vehicle body and includes a telescopic arm and a rotating base. One end of the telescopic arm is rotatably connected to the vehicle body, and the other end of the telescopic arm is rotatably connected to the rotating base. The conversion structure includes a base, a conversion head, and a first driving component. The base is mounted on the rotating base, and the conversion head is rotatably connected to the base and has a first mounting hole and a second mounting hole. A drill bit is disposed in the first mounting hole, and a fracturing tube is installed in the second mounting hole. The first driving component is mounted on the base and is used to push the drill bit or fracturing tube to move.

[0007] By adopting the above technical solution, during mine excavation, the movable structure is operated to adjust the position of the conversion structure located on the base. The conversion head is rotated manually to make the first mounting hole coaxial with the output shaft of the first drive component. The first drive component pushes the drill bit to perform drilling. After drilling is completed, the output shaft of the first drive component drives the drill bit and the second drive component to retract. At this time, the conversion head is rotated again to make the second mounting hole coaxial with the output shaft of the first drive component. The first drive component pushes the fracturing tube, causing the fracturing tube to extend from the second mounting hole and enter the drilled hole to perform blasting. By combining drilling and blasting, the mine is excavated, which helps to improve the excavation efficiency.

[0008] Optionally, a limiting hole is provided on the base, and a mating ring groove is provided on the conversion head. A limiting ring and an elastic element are provided in the mating ring groove, and the end of the limiting ring is provided with an inclined surface; one end of the elastic element abuts against the bottom wall of the mating ring groove, and the other end of the elastic element abuts against the limiting ring.

[0009] By adopting the above technical solution, the elastic element can push the limiting ring. When the first mounting hole or the second mounting hole is coaxial with the output shaft of the first drive component, the limiting ring extends into the limiting hole, maintaining the position of the conversion head at this time, and ensuring the smooth progress of drilling and blasting operations.

[0010] Optionally, there are two mating ring grooves: one mating ring groove is coaxially arranged with the first mounting hole, and the other mating ring groove is coaxially arranged with the second mounting hole.

[0011] By adopting the above technical solution and setting up multiple matching annular grooves, the drilling and blasting operations can be further guaranteed to proceed smoothly.

[0012] Optionally, the converter head is provided with a slide groove, which is opened along the length direction of the drill bit. A second driving member is slidably connected in the slide groove, and the second driving member is drivenly connected to the drill bit to drive the drill bit to rotate.

[0013] By adopting the above technical solution, the second driving component drives the drill bit to rotate and perform drilling. During the process of the first driving component pushing the drill bit, the second driving component moves synchronously with the drill bit.

[0014] Optionally, an arc-shaped groove is provided on the inner wall of the first mounting hole. The arc-shaped groove is provided along the length direction of the drill bit. The end of the drive block that extends into the first mounting hole is arc-shaped and fits against the groove wall of the arc-shaped groove.

[0015] By adopting the above technical solution, it is ensured that the drive block moves smoothly during the pushing process, and the actual position of the drill hole deviates from the marked point when drilling is prevented.

[0016] Optionally, a positioning element for fixing the fracturing tube is provided in the second mounting hole. The positioning element includes a positioning block, a positioning ring, and a positioning plate. The positioning block blocks one end of the second mounting hole away from the first driving element, and the positioning ring is connected to the other end of the second mounting hole. Multiple positioning plates are provided, and multiple positioning plates are rotatably connected to the side of the positioning ring away from the first driving element.

[0017] By adopting the above technical solution, the positioning component can position the fracture tube and prevent it from sliding out of the second mounting hole during the drilling process.

[0018] Optionally, a torsion spring is provided between the positioning plate and the positioning ring for resetting the positioning plate.

[0019] By adopting the above technical solution, when the output shaft of the first drive component retracts, the positioning plate rotates until it abuts against the side of the positioning ring again. When the rupture tube is then inserted into the second mounting hole, the rupture tube is inserted from the end of the first mounting hole that was originally sealed with the positioning block, and then the positioning block is used to seal it again.

[0020] Optionally, the vehicle body is equipped with multiple telescopic outriggers.

[0021] By adopting the above technical solution, when the vehicle body is parked at the position to be drilled, the telescopic outriggers extend and press against the ground to lock the position of the vehicle body, preventing the vehicle body from shifting during the drilling process and causing the drilling point to deviate.

[0022] Secondly, the present invention provides a rock drilling and blasting process based on the aforementioned liquid oxygen phase change fracturing device. The rock drilling and blasting process includes the following steps: S1. Mark the mine shaft, then drive the movable structure to align the base with the marked point; S2. Rotate the conversion head to make the first mounting hole coaxial with the output shaft of the first drive member. Then extend the output shaft of the first drive member to push the drill bit out of the first mounting hole and move toward the marked point. During the movement, the drill bit continues to rotate to perform drilling. S3. After drilling is completed, the output shaft of the first drive unit retracts and the drill bit retracts into the first mounting hole. Then, the conversion head is rotated again to make the second mounting hole coaxial with the output shaft of the first drive unit. S4. The output shaft of the first drive unit extends again, pushing the fracturing tube out of the second mounting hole and into the drilled hole, thus completing the installation of the fracturing tube. S5. Ignite the rupture tube to blast the mine.

[0023] By adopting the above-mentioned technical solution, which combines drilling and blasting to excavate the mine, it is beneficial to improve the excavation efficiency.

[0024] In summary, the present invention has at least one of the following beneficial technical effects: 1. During mine excavation, the movable structure is operated to adjust the position of the conversion structure located on the base. The conversion head is rotated so that the first mounting hole is coaxial with the output shaft of the first drive component. The first drive component pushes the drill bit to perform drilling. After drilling is completed, the output shaft of the first drive component drives the drill bit and the second drive component to retract. At this time, the conversion head is rotated again so that the second mounting hole is coaxial with the output shaft of the first drive component. The first drive component pushes the fracturing tube so that the fracturing tube extends from the second mounting hole and enters the drilled hole to perform blasting. By combining drilling and blasting, the mine is excavated, which helps to improve the excavation efficiency.

[0025] 2. The elastic element can push the limiting ring. When the first mounting hole or the second mounting hole is coaxial with the output shaft of the first drive component, the limiting ring extends into the limiting hole to maintain the position of the conversion head at this time, ensuring the smooth progress of drilling and blasting operations.

[0026] 3. The positioning component can position the fracturing tube to prevent it from sliding out of the second mounting hole during drilling. When the output shaft of the first drive component retracts, the positioning plate rotates until it abuts against the side of the positioning ring again. When the fracturing tube is put into the second mounting hole, it is inserted from the end of the first mounting hole that was originally sealed with the positioning block. Then, the positioning block is used to seal it again. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the liquid oxygen phase change cracking device in this invention; Figure 2 This is a partial structural schematic diagram of the liquid oxygen phase change catalytic cracking device in this invention; Figure 3 This is a cross-sectional structural schematic diagram of the liquid oxygen phase change cracking device in this invention; Figure 4 yes Figure 3 A magnified view of part A in the middle; Figure 5 This is a three-dimensional structural diagram of the positioning component in this invention.

[0028] In the diagram, 1. Vehicle body; 11. Driver's cab; 12. Controller; 13. Observation platform; 2. Movable structure; 21. Telescopic arm; 22. Rotating base; 23. Moving arm; 3. Conversion structure; 31. Base; 311. Limiting hole; 32. Conversion head; 321. First mounting hole; 3211. Arc groove; 322. Second mounting hole; 323. Mating ring groove; 324. Sliding groove; 33. First driving component; 4. Drill bit; 5. Limiting ring; 51. Inclined surface; 6. Elastic element; 7. Second driving component; 71. Driving block; 72. Drive motor; 8. Positioning component; 81. Positioning block; 82. Positioning ring; 83. Positioning plate; 9. Torsion spring; 10. Telescopic outrigger; 20. Rupture tube. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 The present invention will be further described in detail below.

[0030] In the description of this invention, unless otherwise stated, the terms "left," "right," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] A liquid oxygen phase change fracturing device for mine tunneling, with reference to... Figure 1 The system includes a vehicle body 1, a movable structure 2, and a conversion structure 3. The movable structure 2 is located on one side of the vehicle body 1, and the conversion structure 3 is mounted on the movable structure 2. The position of the conversion structure 3 is adjusted by the movable structure 2 to correspond to the drilling and blasting positions. The conversion structure 3 contains a drill bit 4 and a fracturing tube 20. Drilling is performed by ejecting the drill bit 4. After drilling is completed, the fracturing tube 20 is inserted into the drill hole for blasting.

[0033] Specifically, in combination Figure 1 and Figure 2The movable structure 2 includes a telescopic arm 21 and a rotating base 22. The right end of the telescopic arm 21 is rotatably connected to the vehicle body 1, and the left end of the telescopic arm 21 is rotatably connected to the rotating base 22 via a U-shaped connector. The conversion structure 3 is mounted on the rotating base 22. During operation, the position of the rotating base 22 is adjusted by the telescopic arm 21's telescopic and rotating movements. The rotation of the left end of the telescopic arm 21 drives the rotation of the rotating base 22, thereby adjusting the position of the conversion structure 3 located on the rotating base 22 to perform drilling or blasting operations.

[0034] The conversion structure 3 includes a base 31, a conversion head 32, and a first driving member 33. The base 31 is mounted on a rotating base 22, and the conversion head 32 is rotatably connected to the base 31. The conversion head 32 has a first mounting hole 321 and a second mounting hole 322. A drill bit 4 is installed in the first mounting hole 321, and a fracturing tube 20 is installed in the second mounting hole 322. The first driving member 33 is mounted on the base 31 and is used to push the drill bit 4 or the fracturing tube 20 to move. In this embodiment, the first driving member 33 is a telescopic cylinder.

[0035] Before drilling, the conversion head 32 is rotated so that the first mounting hole 321 is coaxial with the output shaft of the first drive member 33. The output shaft of the first drive member 33 extends and pushes the drill bit 4 to drill. After drilling is completed, the output shaft of the first drive member 33 retracts and pulls back the drill bit 4. At this time, the conversion head 32 is rotated again so that the second mounting hole 322 is coaxial with the output shaft of the first drive member 33. The output shaft of the first drive member 33 pushes out again and pushes the fracturing tube 20 from the second mounting hole 322 into the drilled hole to carry out the blasting action.

[0036] Reference Figure 1 The vehicle body 1 is equipped with a driver's cab 11, and a controller 12 is installed inside the driver's cab 11. The controller 12 is electrically connected to the movable structure 2 and the rotating structure respectively. The relevant personnel in the driver's cab 11 control the operation status of the movable structure 2 and the rotating structure through the controller 12, thereby completing the drilling and blasting operations.

[0037] Furthermore, the movable structure 2 also includes a telescopic movable arm 23. The right end of the movable arm 23 is rotatably connected to the vehicle body 1, and the left end of the movable arm 23 is provided with an observation platform 13. The staff can observe the specific situation of the drilling at the observation platform 13 and transmit the drilling situation to the cab in a timely manner so as to adjust the device.

[0038] In addition, the bottom side of the vehicle body 1 is also connected to telescopic outriggers 10. When the vehicle body 1 is parked at the position to be drilled, the telescopic outriggers 10 are extended and pressed against the ground to lock the position of the vehicle body 1, preventing the vehicle body 1 from shifting during the drilling process and causing the drilling point to deviate.

[0039] Reference Figure 2 and Figure 3 The converter head 32 is provided with a slide groove 324, which is opened along the length of the drill bit 4 and is connected to the first mounting hole 321. A second driving member 7 is slidably connected in the slide groove 324. The second driving member 7 is connected to the drill bit 4 for driving the drill bit 4 to rotate.

[0040] Specifically, the second driving component 7 includes a driving block 71 and a driving motor 72. The lower end of the driving block 71 extends into the first mounting hole 321, and the driving motor 72 is located at the left end of the driving block 71. The drill bit 4 is inserted into the driving block 71 and is connected to the driving motor 72 through gears.

[0041] When the drive motor 72 is working, it drives the drill bit 4 to rotate. During the process of the first drive member 33 pushing the drill bit 4, the first drive member 33 abuts against the side wall of the drive block 71. By pushing the drive block 71, the second drive member 7 and the drill bit 4 move as a whole.

[0042] It should be noted that a magnetic sheet (not shown in the figure) is embedded on the side wall of the drive block 71. When the first drive member 33 pushes the drive block 71, the drive block 71 is closely connected to the output shaft of the first drive member 33 through the magnetic sheet. When the output shaft of the first drive member 33 retracts, it drives the drill bit 4 to retract into the first mounting hole 321.

[0043] Furthermore, the drive block 71 extends into the inner end face of the first mounting hole 321 in an arc shape. Correspondingly, an arc groove 3211 is provided on the inner wall of the first mounting hole 321. The arc groove 3211 is opened along the length direction of the drill bit 4. The arc shape of the drive block 71 extending into the first mounting hole 321 fits against the groove wall of the arc groove 3211, thereby ensuring that the drive block 71 moves smoothly during the pushing process.

[0044] Furthermore, referring to Figure 3 and Figure 4 A positioning element 8 for fixing the fracturing tube 20 is provided in the second mounting hole 322. The positioning element 8 includes a positioning block 81. Specifically, the positioning block 81 is located at the end (left end) of the second mounting hole 322 away from the first driving element 33, and blocks the second mounting hole 322. The positioning block 81 is circular and its diameter is larger than the diameter of the second mounting hole 322. The positioning block 81 is made of an elastic material (such as rubber, silicone, etc.). By interfering with the second mounting hole 322, it prevents the fracturing tube 20 from sliding out of the second mounting hole 322 during the drilling process.

[0045] Furthermore, combined Figure 5The positioning component 8 also includes a positioning ring 82 and a positioning plate 83. The positioning ring 82 is connected to the right end of the second mounting hole 322 (i.e., the end near the first driving component 33). Multiple positioning plates 83 are provided, and multiple positioning plates 83 are arranged around the positioning ring 82, and are all rotatably connected to the side of the positioning ring 82 away from the first driving component 33 through a rotating shaft. When the positioning plate 83 fixes the rupture tube 20, the positioning ring 82 of the positioning plate 83 abuts against the side away from the first driving component 33. When the rupture tube 20 is in the second mounting hole 322, one end of the rupture tube 20 abuts against the positioning block 81, and the other end of the rupture tube 20 abuts against the multiple positioning plates 83, thereby being fixed.

[0046] After drilling is completed, the conversion head 32 is rotated again to make the second mounting hole 322 coaxial with the output shaft of the first drive member 33. Then the output shaft of the first drive member 33 extends and pushes the positioning plate 83. The positioning plate 83 rotates, and the rupture tube 20 further pushes the positioning block 81. After the positioning block 81 disengages from the second mounting hole 322, the rupture tube 20 smoothly extends out of the second mounting hole 322 and enters the drilled hole.

[0047] In addition, a torsion spring 9 is provided between the positioning plate 83 and the positioning ring 82 for resetting the positioning plate 83. The torsion spring 9 is sleeved on the rotating shaft. When the output shaft of the first driving member 33 retracts, the positioning plate 83 rotates in the direction until it abuts against the side of the positioning ring 82 again.

[0048] When inserting the rupture tube 20 into the second mounting hole 322, insert the rupture tube 20 into the end of the first mounting hole 321 that was originally sealed with the positioning block 81, and then seal it again with the positioning block 81.

[0049] Furthermore, referring to Figure 3 In order to ensure that the converter head 32 can maintain its state when it is rotated to the corresponding position (i.e., when the first mounting hole 321 or the second mounting hole 322 is coaxial with the output shaft of the first drive member 33), and to ensure the smooth progress of drilling and blasting operations, a limit hole 311 is provided on the base 31, and a mating ring groove 323 is provided on the converter head 32.

[0050] There are two mating ring grooves 323. One mating ring groove 323 is coaxial with the first mounting hole 321, and the other mating ring groove 323 is coaxial with the second mounting hole 322. Both mating ring grooves 323 are provided with limit rings 5 ​​and elastic elements 6.

[0051] One end of the elastic element 6 abuts against the groove wall of the mating ring groove 323, and the other end of the elastic element 6 abuts against the limiting ring 5. When the limiting ring 5 abuts against the end of the elastic element 6 away from it, the elastic element 6 is in a contracted state. When the limiting hole 311 and the mating ring groove 323 are coaxial, the elastic element 6 pushes the limiting ring 5, causing the limiting ring 5 to extend into the limiting hole 311, thereby locking the position of the conversion head 32.

[0052] In addition, the end of the limiting ring 5 away from the elastic element 6 is provided with a bevel 51. In other words, the end of the limiting ring 5 away from the elastic element 6 is provided with a chamfer. When the conversion head 32 rotates again, it is guided by the bevel 51, and the limiting ring 5 is squeezed back into the mating ring groove 323.

[0053] It should be noted that in this embodiment, the rotation of the converter head 32 is driven by the drive motor 72. In order to further maintain the position of the converter head 32, a drive motor 72 with a self-locking function can be selected to drive the converter head 32 to rotate.

[0054] The implementation principle of this invention is as follows: When tunneling a mine, the vehicle body 1 is first parked at the position to be tunneled. Then, the movable structure 2 is operated to adjust the position of the conversion structure 3 located on the base, and the conversion head 32 is rotated so that the first mounting hole 321 is coaxially set with the output shaft of the first drive member 33. The first drive member 33 pushes the drill bit 4 to perform drilling. After drilling is completed, the output shaft of the first drive member 33 drives the drill bit 4 and the second drive member 7 to retract. At this time, the conversion head 32 is rotated again so that the second mounting hole 322 is coaxially set with the output shaft of the first drive member 33. The first drive member 33 pushes the fracturing tube 20 so that the fracturing tube 20 breaks through the blockage of the positioning block 81, extends out from the second mounting hole 322 and enters the drilled hole to perform blasting. The degree of automation is higher, which is conducive to improving tunneling efficiency.

[0055] Furthermore, this embodiment also discloses a blasting method. Based on the aforementioned liquid oxygen phase change fracturing device, the blasting method includes the following steps: S1. Mark the mine shaft, then drive the movable structure 2 to align the base 31 with the marked point; S2. Rotate the conversion head 32 so that the first mounting hole 321 is coaxially set with the output shaft of the first drive member 33. Then extend the output shaft of the first drive member 33 to push the drill bit 4 out of the first mounting hole 321 and move towards the marked point. During the movement, the drill bit 4 continues to rotate to perform drilling. S3. After drilling is completed, the output shaft of the first drive unit 33 retracts, and the drill bit 4 retracts into the first mounting hole 321. Then, the conversion head 32 is rotated again so that the second mounting hole 322 is coaxially set with the output shaft of the first drive unit 33. S4. The output shaft of the first drive unit 33 extends again, pushing the fracturing tube 20 out of the second mounting hole 322 and into the drilled hole, thus completing the installation of the fracturing tube 20. S5, ignite the fracture-inducing pipe 20, and blast the mine.

[0056] The embodiments described in this specific description are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A liquid oxygen phase change-induced cracking device, characterized in that, include: Vehicle body (1); The movable structure (2) is set on one side of the vehicle body (1) and includes a telescopic arm (21) and a rotating base (22). One end of the telescopic arm (21) is rotatably connected to the vehicle body (1), and the other end of the telescopic arm (21) is rotatably connected to the rotating base (22). The conversion structure (3) includes a base (31), a conversion head (32) and a first driving member (33). The base (31) is mounted on the rotating base (22), and the conversion head (32) is rotatably connected to the base (31) and has a first mounting hole (321) and a second mounting hole (322). A drill bit (4) is provided in the first mounting hole (321), and a fracturing tube (20) is installed in the second mounting hole (322). The first driving member (33) is installed on the base (31) and is used to push the drill bit (4) or the fracturing tube (20) to move.

2. The liquid oxygen phase change fracturing device according to claim 1, characterized in that, The base (31) has a limiting hole (311), and the conversion head (32) has a mating annular groove (323). The mating annular groove (323) is provided with: Limiting ring (5), the end of the limiting ring (5) is provided with a bevel (51); The elastic element (6) has one end abutting against the bottom wall of the mating ring groove (323) and the other end abutting against the limiting ring (5).

3. The liquid oxygen phase change fracturing device according to claim 2, characterized in that, Two mating grooves (323) are provided. One mating groove (323) is coaxially arranged with the first mounting hole (321), and the other mating groove (323) is coaxially arranged with the second mounting hole (322).

4. The liquid oxygen phase change fracturing device according to claim 1, characterized in that, The conversion head (32) is provided with a slide groove (324), which is opened along the length direction of the drill bit (4). A second driving member (7) is slidably connected in the slide groove (324). The second driving member (7) is connected to the drill bit (4) for driving the drill bit (4) to rotate.

5. The liquid oxygen phase change fracturing device according to claim 4, characterized in that, The second driving element (7) includes: A drive block (71), the lower end of which extends into the first mounting hole (321); A drive motor (72) is installed at the left end of the drive block (71); The drill bit (4) is inserted into the drive block (71) and is connected to the drive motor (72) via gears.

6. The liquid oxygen phase change fracturing device according to claim 5, characterized in that, An arc-shaped groove (3211) is provided on the inner wall of the first mounting hole (321). The arc-shaped groove (3211) is provided along the length direction of the drill bit (4). The drive block (71) extends into the first mounting hole (321) with one end arc-shaped and fits against the groove wall of the arc-shaped groove (3211).

7. The liquid oxygen phase change fracturing device according to claim 1, characterized in that, The second mounting hole (322) is provided with a positioning element (8) for fixing the fracturing tube (20), the positioning element (8) comprising: Positioning block (81) blocks the end of the second mounting hole (322) that is away from the first driving member (33). A positioning ring (82) is connected to the other end of the second mounting hole (322); Multiple positioning plates (83) are provided, and each of the multiple positioning plates (83) is rotatably connected to the side of the positioning ring (82) facing away from the first driving member (33).

8. The liquid oxygen phase change fracturing device according to claim 7, characterized in that, A torsion spring (9) is provided between the positioning plate (83) and the positioning ring (82) for resetting the positioning plate (83).

9. The liquid oxygen phase change fracturing device according to claim 1, characterized in that, The vehicle body (1) is equipped with multiple telescopic outriggers (10).

10. A rock drilling and blasting process, based on the liquid oxygen phase change fracturing device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Mark the mine shaft, and then drive the movable structure (2) to align the base (31) with the marked point; S2. Rotate the conversion head (32) to make the first mounting hole (321) coaxial with the output shaft of the first drive member (33), and then extend the output shaft of the first drive member (33) to push the drill bit (4) out of the first mounting hole (321) and move toward the mark point. During the movement, the drill bit (4) performs drilling action. S3. After drilling is completed, the output shaft of the first drive unit (33) retracts and the drill bit (4) retracts into the first mounting hole (321). Then, the conversion head (32) is rotated again to make the second mounting hole (322) coaxial with the output shaft of the first drive unit (33). S4. The output shaft of the first drive unit (33) extends again, pushing the fracturing tube (20) out from the second mounting hole (322) and into the drilled hole to complete the installation of the fracturing tube (20); S5, ignite the fracture tube (20) to blast the mine.

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