A mining with undercutting equipment and operating process

Abstract

The application discloses a kind of mining with undercutting equipment and operating process, including mobile pneumatic rock drill, further include switching unit: for the drill bit of corresponding specification when needing to participate in subsequent undercutting operation is replaced to be installed work station;Installation and disassembly unit: in the process that the drill rod moves outward drilling, drill bit on installation work station is automatically installed to the drill rod of mobile pneumatic rock drill;And in the process that the drill rod restores original position, the drill rod is separated from the drill bit and is disassembled.This undercutting equipment can automatically replace drill bit as needed, save disassembly time, improve operating efficiency, and in the process that drill rod does reciprocating motion, the installation and disassembly of drill bit are automatically completed, further shorten the replacement time of drill bit, improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of mining technology, and in particular to a slotting device and operating process for mining. Background Technology

[0002] In gold and other metal mining operations, one of the core processes in tunnel excavation is slotting blasting—by first creating slots of specific diameter and depth on the working face (divided into large-diameter holes providing a free face and small-diameter charging holes for explosives), conditions are created for subsequent blasting, directly affecting the tunnel formation quality and cycle advance efficiency. Currently, the industry commonly uses mobile pneumatic rock drills for slotting, which, due to their high mobility and adaptability to narrow underground spaces, have become the mainstream equipment for small and medium-sized mines and complex tunnels.

[0003] In gold mining, mobile pneumatic rock drills are used. Before operation, the height and angle of the drill rod are adjusted. During operation, the drill rod is rotated via a pneumatic drive, and its lateral outward movement is controlled to create a slot of a certain depth. After the slot is created, the drill rod moves in the opposite direction, exiting the slot and returning to its original position. The drill rod then continues to move outward to create the next slot. These drills are used to cut grooves in the rock strata. Explosives are then placed in the grooves for blasting. The cutting process requires drilling different diameter slots (e.g., 40-45mm for the charging hole and 80-150mm for the empty hole) within the same rock strata. Frequent switching is necessary to match the combined cutting logic of "empty hole - charging hole." Currently, the operation requires manual shutdown, manual removal of the old drill bit, and installation of the new drill bit aligned with the drill rod. Each replacement takes 2-3 hours. The process is slow, inefficient, and time-consuming. Therefore, this application provides a mining trenching equipment and operating process to meet the requirements. Summary of the Invention

[0004] The purpose of this application is to provide a slotting device and operating process for mining operations, which solves the technical problem of low work efficiency caused by frequent manual operation to change drill bits in existing equipment.

[0005] To achieve the above objectives, this application provides the following technical solution: a mining trenching device, including a mobile pneumatic rock drill, and further comprising...

[0006] Switching unit: Used to replace the drill bit of the corresponding specification that needs to participate in subsequent trenching operations to the installation position;

[0007] Installation and disassembly unit: During the process of the drill rod moving outward to drill a hole, the drill bit at the installation station is automatically installed onto the drill rod of the mobile pneumatic rock drill; and the drill rod and the drill bit are disassembled and separated during the process of the drill rod returning to its original position.

[0008] In a preferred embodiment of this invention, the switching unit includes a worm gear ring, a worm, and a drive component that drives the worm to rotate.

[0009] The worm gear ring is rotatably mounted on the mounting frame of the mobile pneumatic rock drill, and the worm gear ring is meshed with the worm.

[0010] The upper end of the worm gear ring is fixed with an arc-shaped plate, and the arc-shaped plate is provided with a through hole. The through hole is located on the movement path of the drill rod. Multiple sets of drill bits of different specifications are installed at equal intervals on the outer wall of the worm gear ring.

[0011] The installation and disassembly unit includes two sets of first telescopic rods installed on the drill bit insertion end and arranged opposite to each other, two sets of second telescopic rods arranged in the inner cavity of the drill bit insertion end and arranged opposite to each other, and two sets of positioning rods;

[0012] The first telescopic rod has a first spring installed in its inner cavity, and a first end is fixed to the movable end of the first telescopic rod. The first end is an isosceles triangle structure. A retaining ring is fixed to the movable end of the first telescopic rod, and a baffle adapted to the retaining ring is provided on the drill bit.

[0013] A second spring is installed inside the second telescopic rod. The second telescopic rod is mounted on a U-shaped rod, which is mounted on an abutment rod. The upper end of the abutment rod is slidably disposed in the inner cavity of the drill bit. The upper end of the abutment rod is connected to the drill bit through a return spring. The lower end of the abutment rod slides through the drill bit. A notch is provided on the abutment rod, and a stop is provided in the inner cavity of the notch. The left end of the stop is fixedly connected to the movable end of the second telescopic rod. A contact rod is installed on the abutment rod.

[0014] The positioning rod is slidably disposed in the inner cavity of the drill bit, the right end of the positioning rod penetrates into the insertion cavity of the drill bit insertion end, the lower right end of the positioning rod is inclined, the positioning rod is located on the upper left end of the inner cavity of the drill bit, and a right-angled trapezoidal cavity is provided on the positioning rod;

[0015] The arc-shaped plate is provided with multiple limiting rings, and each of the multiple limiting rings is adapted to the insertion end of the multiple drill bits, and each of the limiting rings is equipped with a limiting ring on its periphery.

[0016] The drill bit has multiple sets of insertion grooves arranged in a circular pattern on the inner wall of the insertion end. The drill rod has multiple sets of insertion rods that are adapted to the insertion grooves on its outer wall. The insertion end of the insertion rod is set as an isosceles triangle. The drill rod has a positioning groove that is adapted to the positioning rod.

[0017] As a preferred embodiment of this invention, a precision docking unit is also provided to achieve precise insertion of the drill rod and the drill bit, as well as the positioning rod and the positioning groove.

[0018] In a preferred embodiment of this invention, the precision docking unit includes four sets of arc-shaped blocks and four sets of positioning grooves. The four sets of arc-shaped blocks are arranged in a circumferentially spaced manner in the inner cavity of the insertion end of the drill bit, and the insertion groove is formed between two adjacent sets of arc-shaped blocks.

[0019] The ends of the four sets of arc-shaped blocks near the drill bit insertion end are isosceles triangular structures;

[0020] The four sets of positioning grooves are arranged in a circular pattern at equal intervals on the outer wall of the drill rod.

[0021] In a preferred embodiment of this invention, the mounting frame is provided with multiple sets of shields arranged in a circle with the arc-shaped plate at the same center, and none of the multiple sets of shields are on the movement path of the drill rod.

[0022] In a preferred embodiment of this invention, a universal ball bearing is installed at the left end of the positioning rod.

[0023] In a preferred embodiment of this invention, the drive unit includes two sets of bevel gears and a hand crank, wherein the two sets of bevel gears are respectively connected to and meshed with the worm gear and the hand crank.

[0024] In summary, the technical effects and advantages of this invention are as follows:

[0025] 1. The present invention has a reasonable structure. This grooving equipment can automatically replace the drill bit as needed, saving disassembly and assembly time and improving work efficiency. Moreover, the installation and disassembly of the drill bit are automatically completed during the reciprocating motion of the drill rod, further shortening the drill bit replacement time and improving work efficiency.

[0026] 2. In this invention, the setting of the limiting ring and the precision docking unit enables the drill rod and the drill bit to complete precise docking, and at the same time makes the equipment have a wider range of applications. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a front view structural diagram of the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the installation, disassembly and switching unit for the intermediate drill bit;

[0030] Figure 3 for Figure 2 A partial top-view structural diagram;

[0031] Figure 4 for Figure 2 A schematic diagram of a single drill bit and a partially enlarged section of the drill bit structure;

[0032] Figure 5 for Figure 4 Schematic diagram of a partial cross-sectional structure of the drill bit;

[0033] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0034] Figure 7 for Figure 2 Enlarged structural diagram at point A in the middle;

[0035] Figure 8 This is a schematic diagram showing the installation location of the shield.

[0036] In the diagram: 1. Mobile pneumatic rock drill; 2. Mounting frame; 3. Drill rod; 4. Worm gear ring; 5. Arc plate; 6. Through hole; 7. Limiting ring; 8. Limiting ring; 9. Drill bit; 10. First telescopic rod; 11. Retaining ring; 12. Baffle; 13. First end; 14. Insertion groove; 15. Insert rod; 16. Positioning groove; 17. Abutment rod; 18. U-shaped rod; 19. Second telescopic rod; 20. Second spring; 21. Notch; 22. Stop block; 23. Contact rod; 24. Positioning rod; 25. Right-angled trapezoidal cavity; 26. Return spring; 27. Worm gear; 28. Hand crank; 29. ​​Bevel gear; 30. Cover plate; 31. Arc block. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example: Reference Figure 1 The mining equipment shown includes a mobile pneumatic rock drill 1, and also includes...

[0039] Switching unit: used to replace the drill bit 9 of the corresponding specification that needs to participate in subsequent slotting operations to the installation position;

[0040] Installation and disassembly unit: During the drilling process of the drill rod 3 moving outward to drill the hole, the drill bit 9 on the installation station is automatically installed onto the drill rod 3 of the mobile pneumatic rock drill 1; and the drill rod 3 and drill bit 9 are disassembled and separated during the process of the drill rod 3 returning to its original position.

[0041] As a preferred embodiment of this example, Figure 1-7 As shown, the switching unit includes a worm gear ring 4, a worm 27, and a drive component that drives the worm 27 to rotate;

[0042] The worm gear ring 4 is rotatably mounted on the mounting frame 2 of the mobile pneumatic rock drill 1, and the worm gear ring 4 is meshed with the worm 27.

[0043] The upper end of the worm gear ring 4 is fixed with an arc plate 5, and the arc plate 5 is provided with a through hole 6. The through hole 6 is located on the movement path of the drill rod 3. Multiple sets of drill bits 9 of different specifications are installed at equal intervals on the outer wall of the worm gear ring 4.

[0044] The installation and disassembly unit includes two sets of first telescopic rods 10 installed on the insertion end of the drill bit 9 and arranged opposite to each other, two sets of second telescopic rods 19 arranged in the inner cavity of the insertion end of the drill bit 9 and arranged opposite to each other, and two sets of positioning rods 24.

[0045] The inner cavity of the first telescopic rod 10 is equipped with a first spring, and the movable end of the first telescopic rod 10 is fixed with a first end 13. The first end 13 is an isosceles triangle structure. A retaining ring 11 is fixed on the movable end of the first telescopic rod 10, and a baffle 12 adapted to the retaining ring 11 is provided on the drill bit 9.

[0046] The second telescopic rod 19 is equipped with a second spring 20. The second telescopic rod 19 is mounted on the U-shaped rod 18, which is mounted on the abutment rod 17. The upper end of the abutment rod 17 is slidably disposed in the inner cavity of the drill bit 9. The upper end of the abutment rod 17 is connected to the drill bit 9 through the return spring 26. The lower end of the abutment rod 17 slides through the drill bit 9. The abutment rod 17 is provided with a notch 21, and the inner cavity of the notch 21 is provided with a stop block 22. The left end of the stop block 22 is fixedly connected to the movable end of the second telescopic rod 19. The abutment rod 23 is installed on the abutment rod 17.

[0047] The positioning rod 24 is slidably disposed in the inner cavity of the drill bit 9. The right end of the positioning rod 24 extends through the insertion cavity of the drill bit 9 insertion end. The lower right end of the positioning rod 24 is set with an inclined surface. The positioning rod 24 is located on the upper left end of the inner cavity of the drill bit 9 with an inclined surface. A right-angled trapezoidal cavity 25 is set on the positioning rod 24.

[0048] Multiple limiting rings 8 are provided on the arc plate 5, and the multiple limiting rings 8 are adapted to the insertion ends of multiple drill bits 9 one by one, and each limiting ring 8 is equipped with a limiting ring 7 on its periphery.

[0049] The drill bit 9 has multiple sets of insertion grooves 14 arranged in a circular pattern on the inner wall of the insertion end. The drill rod 3 has multiple sets of insertion rods 15 that are adapted to the insertion grooves 14 on the outer wall. The insertion end of the insertion rod 15 is set as an isosceles triangle. The drill rod 3 has a positioning groove 16 that is adapted to the positioning rod 24.

[0050] After the angle and height of drill rod 3 are adjusted, the worm gear 27 can be rotated by the drive component, which in turn drives the arc plate 5 to rotate through the worm wheel ring 4, causing the drill bit 9 of the corresponding specification to move to the installation position. At this time, the mobile pneumatic rock drill 1 can be controlled to work. Initially (e.g.) Figure 2 , Figure 3 and Figure 5 As shown, at this time, the outer end of the contact rod 7 abuts against the outer end face of the arc plate 5, the insertion end of the drill bit 9 is located in the inner cavity of the limiting ring 8, the return spring 26 is in a compressed state, and through the elastic force of the return spring 26, the inclined surface on the first end 13 abuts against the limiting ring 7, causing the drill rod 3 to move laterally outward. The insertion end of the drill rod 3 will pass through the through hole 6 and extend to the inner cavity of the insertion end of the drill bit 9. As the drill rod 3 is slowly inserted, the end of the drill rod 3 will abut against the inclined surface of the positioning rod 24 and squeeze the positioning rod 24, causing the positioning rod 24 (at this time, the left end of the positioning rod 24 is in contact with the stop block 22) to compress the second spring 20, and finally complete the insertion of the positioning rod 24 into the positioning groove 15. At this time, the drill rod The insertion end of drill rod 3 abuts against the inner wall of drill rod 9. Drill rod 3 continues to move outward. At this time, drill bit 9 is pushed outward, causing the first end 13 to compress the first spring. At this time, the compressed return spring 26 slowly relaxes. The stop block 22 moves downward relative to the positioning rod 24. When the left end of the positioning rod 24 does not contact the stop block 22 in the notch 21, and the left end of the positioning rod 24 contacts the side end face of the abutting rod 17, the first end 13 passes the blocking edge of the limiting ring 7 and finally achieves contact separation with the limiting ring 7. That is, at this time, the installation of drill bit 9 and drill rod 17 is completed by the insertion of positioning rod 24 and positioning groove 16. After installation, the drill rod 9 is controlled to rotate to perform grooving treatment on the rock layer.

[0051] When the drill bit 9 is working, the left end of the positioning rod 24 is in contact with the abutment rod 17 at this time, and will not move due to centrifugal force during the rotation, so that the positioning rod 24 is stably inserted into the positioning groove 16.

[0052] After the grooving is completed, the drill bit 9 stops rotating and the drill rod 3 is moved back. During this process, the insertion end of the drill bit 9 moves into the limiting ring 8. The outer end of the contact rod 17 abuts against the arc plate 5 to form a squeeze, and the inclined surface on the first end 13 contacts the limiting ring 7 to form a squeeze. As the drill rod 3 continues to move back, the first end 13 eventually passes the limiting ring 71. During this process, the return spring 26 is compressed, the contact rod 17 moves upward relative to the positioning rod 24, and when the left end of the positioning rod 24 contacts the stop block 22, the upper end of the contact rod 23 slides against the inclined surface of the right-angle trapezoidal cavity 25, causing the positioning rod 24 to move outward and finally release the insertion of the positioning rod 24 into the positioning groove 16. At this time, the drill rod 3 can be removed from the inner cavity of the drill bit 9 to complete the disassembly. Under the action of the rebound force of the return spring 26, the first end 13 will contact the limiting ring 7 again to form a block, and all components will return to their initial state.

[0053] This grooving equipment can automatically replace the drill bit 9 as needed, saving disassembly and assembly time and improving work efficiency. Moreover, the installation and disassembly of the drill bit are automatically completed during the reciprocating motion of the drill rod 3 (which is required during grooving operations), further shortening the replacement time of the drill bit 7 and improving work efficiency.

[0054] Furthermore, each time a slot is completed using drill rod 3, the installation and removal of drill rod 3 and drill bit 9 are completed. Mining requires alternating drilling of slots with different diameters (such as empty holes with a diameter of 80-150mm and charging holes with a diameter of 40-45mm), and the combination of "empty hole - charging hole" must be followed. After each slot is completed, the current drill bit 9 is automatically removed, and a new drill bit 9 of the corresponding specification can be immediately moved to the installation position through the switching unit. When drill rod 3 is pushed out next time, the installation is completed directly and the next slot operation is started. This completely avoids the process interruptions of traditional equipment, such as "operation - shutdown - manual removal of drill bit - manual installation of new drill bit - restart of operation", which greatly improves work efficiency.

[0055] It is important to note the following: First, the drive component can be a motor, which drives the worm gear 27 to rotate. The motor is electrically connected to a PLC control system. A program can be set so that after the motor rotates to a certain angle and stops, the corresponding drill bit 9 stops precisely in the installation position. After the drill rod 3 returns to its original position, the motor is controlled to move the drill bit to the installation position (because the motor control allows the drill bit to rotate quickly to the installation position). This process is completed before the drill rod 3 end is inserted into the drill bit 9, resulting in a very short disassembly and assembly time for the drill bit 9, greatly improving work efficiency. Second, the upper left end of the positioning rod 24 is beveled to prevent… Even if the end of the positioning rod 24 moves into the notch 21, the edge of the inner cavity of the notch 21 will be squeezed by the elastic force of the return spring 26 and the inclined surface, causing the end of the positioning rod 24 to move out of the inner cavity of the notch, thus avoiding the inability to form the insertion and positioning of the positioning rod 24 and the positioning groove 16; third, a baffle 12 is provided, which contacts the retaining ring 11 to prevent the movable end of the second telescopic rod 19 from moving outward when the drill bit 9 rotates; fourth, after the drill bit 9 and the drill rod 3 are connected, the inner cavity of the drill bit 9 (which is provided with a dust suction hole) is connected to the inner cavity of the drill rod 3 (which is provided with a hollow dust suction chamber) for dust suction during drilling.

[0056] As a preferred embodiment of this invention, a precision docking unit is also provided to achieve precise insertion of the drill rod 3 and the drill bit 9, as well as the positioning rod 24 and the positioning groove 16.

[0057] Each time the drill rod 7 separates from the drill bit 9, it cannot be guaranteed that the insertion rod 15 on the subsequent drill rod 7 can be inserted into the insertion groove 14 on the drill bit 9. Therefore, a precise docking unit is set up.

[0058] As a preferred embodiment of this example, Figure 4 and Figure 7 As shown, the precision docking unit includes four sets of arc-shaped blocks 31 and four sets of positioning grooves 16. The four sets of arc-shaped blocks 31 are arranged in a circumferentially spaced manner in the inner cavity of the insertion end of the drill bit 9, and an insertion groove 14 is formed between two adjacent sets of arc-shaped blocks 31.

[0059] The ends of the four sets of arc-shaped blocks 31 near the insertion end of the drill bit 9 are isosceles triangular structures;

[0060] Four sets of positioning grooves 16 are arranged in a circular pattern at equal intervals on the outer wall of the drill rod 3.

[0061] When the drill rod 3 is inserted into the drill bit 9, the end of the insertion rod 15 on the drill rod 3 will contact and abut against the inclined surface on the arc block 31, which will cause the drill bit 9 to rotate and eventually allow the insertion rod 15 to be smoothly inserted into the insertion groove 14. Two of the four sets of positioning grooves 16 will correspond to the positioning rod 24 and complete the installation.

[0062] It should be noted that: due to the different depths of each type of slot, the number of rotations of the drill bit 3 during grinding is different. It cannot be guaranteed that the first end 13 can return to its original position after the drill bit 9 has completed one installation and disassembly separation. Therefore, a limit ring 7 is set to not restrict the position of the first end 13. In conjunction with the setting of a precision docking unit, the drill rod 3 and the drill bit 9 can be precisely docked, which also makes this equipment have a wider range of applications.

[0063] As a preferred embodiment of this example, Figure 8 As shown, multiple sets of baffles 30 are arranged in a circle with the arc plate 5 at the same center on the mounting frame 2. None of the multiple sets of baffles 30 are on the movement path of the drill rod 3.

[0064] By setting the shield 30, dust accumulation can be prevented from occurring when the non-working drill bit 9 is working, thus avoiding any impact on the replacement of subsequent drill bits 3.

[0065] As a preferred embodiment of this example, Figure 2 As shown, a universal ball bearing is installed on the left end of the positioning rod 24.

[0066] This can reduce the friction between the positioning rod 24, the stop block 22, and the abutment rod 17.

[0067] As a preferred embodiment of this example, Figure 6 As shown, the drive unit includes two sets of bevel gears 29 and a set of hand cranks 28. The two sets of bevel gears 29 are respectively connected to and meshed with the worm gear 27 and the hand crank 28.

[0068] The worm gear 27 can be driven by the hand crank 28 to rotate the worm wheel ring 4, thereby rotating the drill bit to the installation position. Compared with using a motor, manual operation is slightly more troublesome. The drive component structure can be selected according to actual needs.

[0069] It should be noted that a pointer can be set on the rotating shaft of the hand crank 28, and a dial can be installed on the mounting bracket 2. The dial has a corresponding position mark of the drill bit 9. When the pointer matches the position mark, it means that the drill bit 9 has been rotated to the correct position.

[0070] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A slotting device for mining operations, including a mobile pneumatic rock drill (1), characterized in that: Also includes Switching unit: used to replace the drill bit (9) of the corresponding specification that needs to participate in the subsequent grooving operation to the installation position; Installation and disassembly unit: During the process of drilling the hole by moving the drill rod (3) outward, the drill bit (9) on the installation station is automatically installed onto the drill rod (3) of the mobile pneumatic rock drill (1); and the drill rod (3) and the drill bit (9) are disassembled and separated during the process of the drill rod (3) returning to its original position. The switching unit includes a worm gear ring (4), a worm (27), and a drive component for rotating the worm (27); The worm gear ring (4) is rotatably mounted on the mounting frame (2) of the mobile pneumatic rock drill (1), and the worm gear ring (4) is meshed with the worm (27); The upper end of the worm gear ring (4) is fixed with an arc plate (5), and the arc plate (5) is provided with a through hole (6). The through hole (6) is located on the movement path of the drill rod (3). Multiple sets of drill bits (9) of different specifications are installed at equal intervals on the outer wall of the worm gear ring (4). The installation and disassembly unit includes two sets of first telescopic rods (10) installed on the insertion end of the drill bit (9) and arranged opposite to each other, two sets of second telescopic rods (19) arranged in the inner cavity of the insertion end of the drill bit (9) and arranged opposite to each other, and two sets of positioning rods (24). The first telescopic rod (10) has a first spring installed in its inner cavity, and the movable end of the first telescopic rod (10) is fixed with a first end (13). The first end (13) is an isosceles triangle structure. A retaining ring (11) is fixed on the movable end of the first telescopic rod (10), and a baffle (12) adapted to the retaining ring (11) is provided on the drill bit (9). A second spring (20) is installed inside the second telescopic rod (19). The second telescopic rod (19) is installed on the U-shaped rod (18). The U-shaped rod (18) is installed on the abutment rod (17). The upper end of the abutment rod (17) is slidably disposed in the inner cavity of the drill bit (9). The upper end of the abutment rod (17) is connected to the drill bit (9) through the return spring (26). The lower end of the abutment rod (17) slides through the drill bit (9). A notch (21) is provided on the abutment rod (17), and a stop block (22) is provided in the inner cavity of the notch (21). The left end of the stop block (22) is fixedly connected to the movable end of the second telescopic rod (19). A contact rod (23) is installed on the abutment rod (17). The positioning rod (24) is slidably disposed in the inner cavity of the drill bit (9). The right end of the positioning rod (24) penetrates into the insertion cavity of the drill bit (9). The lower right end of the positioning rod (24) is inclined. The positioning rod (24) is located on the upper left end of the inner cavity of the drill bit (9). A right-angled trapezoidal cavity (25) is disposed on the positioning rod (24). The arc plate (5) is provided with multiple limiting rings (8), and the multiple limiting rings (8) are adapted to the insertion ends of the multiple drill bits (9) one by one, and each limiting ring (8) is equipped with a limiting ring (7) on its periphery. The drill bit (9) has multiple sets of insertion grooves (14) arranged in a circular pattern on the inner wall of the insertion end. The drill rod (3) has multiple sets of insertion rods (15) that are adapted to the insertion grooves (14) on the outer wall. The insertion end of the insertion rod (15) is set as an isosceles triangle. The drill rod (3) has a positioning groove (16) that is adapted to the positioning rod (24).

2. The mining trenching equipment according to claim 1, characterized in that: It is also equipped with a precision docking unit to achieve precise insertion of the drill rod (3) and the drill bit (9) and the positioning rod (24) and the positioning groove (16).

3. A slotting device for mining operations according to claim 2, characterized in that: The precision docking unit includes four sets of arc blocks (31) and four sets of positioning grooves (16). The four sets of arc blocks (31) are arranged in a circumferentially spaced manner in the inner cavity of the insertion end of the drill bit (9), and the insertion groove (14) is formed between two adjacent sets of arc blocks (31). The ends of the four sets of arc-shaped blocks (31) near the insertion end of the drill bit (9) are isosceles triangular structures; The four sets of positioning grooves (16) are arranged in a circular pattern at equal intervals on the outer wall of the drill rod (3).

4. A slotting device for mining operations according to claim 1, characterized in that: The mounting frame (2) is provided with multiple sets of shields (30) arranged in a circle with the arc plate (5) at the same center. The multiple sets of shields (30) are evenly distributed on the movement path of the drill rod (3).

5. A slotting device for mining operations according to claim 1, characterized in that: The left end of the positioning rod (24) is equipped with a universal ball bearing.

6. A slotting device for mining operations according to claim 1, characterized in that: The drive unit includes two sets of bevel gears (29) and a hand crank (28). The two sets of bevel gears (29) are respectively connected to and meshed with the worm gear (27) and the hand crank (28).

7. The operating process for a mining operation using a slotting device according to any one of claims 1-6, characterized in that: Includes the following steps; S1: Rotate the drill bit (9) to be replaced to the installation position using the drive component; S2: Control the drill rod (3) to move. When the drill rod (3) moves outward, the end will be inserted with the drill bit (9) in the installation position and locked by the insertion of the positioning rod (24) and the positioning groove (16). When the drill rod (3) moves back, the end of the drill rod (3) will be separated from the drill rod (3). The separated drill bit (9) is limited on the arc plate (5) and waits for the next drill bit (9) to be replaced.

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