Precise point mining blasting hole charging device and method thereof

Abstract

The present application relates to the technical field of blasting, in particular to a precise point mining blasting hole charging device and method thereof. The precise point mining blasting hole charging device comprises a temporary storage tank, a guide tube and a filling bag, etc. The top of the temporary storage tank is provided with a through hole for adding reagent, and the bottom of the temporary storage tank is provided with a guide tube which can slide up and down. The guide tube is sleeved with a filling bag which is suitable for filling reagent. The present application can adjust the amount of blasting reagent according to the size, depth and geological conditions of the hole, so as to meet the needs of different hole charging. At the same time, the filling bag is used to receive the blasting reagent, so as to separate the blasting reagent from the mine hole, prevent the blasting reagent from being damp or contaminated, and ensure the explosion effect of the blasting reagent.

Description

Technical Field

[0001] This invention relates to the field of blasting technology, specifically to a precise, point-based charging device and method for mining blasting boreholes. Background Technology

[0002] Mining begins with blasting to remove ore from the rock mass and strip the surrounding rock of the ore body from the roof. The ore is then blasted into specific piles and broken into blocks of a certain size according to engineering requirements, creating conditions for subsequent loading, transportation, and other operations.

[0003] According to Chinese patent publication document CN111998745B, a blast hole charging assembly for mining blasting is proposed, including a charging cylinder head end, a splicing groove, a locking block, and a connecting end. The top of the charging cylinder head end is fixedly connected to the splicing groove, the locking block is embedded inside the splicing groove, the top of the locking block is fixedly connected to the connecting end, the top of the connecting end is fixedly connected to the splicing cylinder, and a fixing bolt is embedded on one side of the splicing groove.

[0004] Although the aforementioned patents enable loading of explosives before mining blasting, in actual use, the existing blasting explosive packages are basically of fixed specifications, and the amount of explosives inside is also basically fixed. Therefore, they cannot meet the needs of adjusting the amount of explosives at the blasting site according to the size and depth of the blast hole and the geological conditions near the blast hole. Furthermore, the cooling water generated when drilling blasting holes will carry impurities such as mud and sand into the holes. If the explosives are directly loaded into the holes, they are prone to moisture absorption and failure, thus affecting the blasting effect of the ore. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the present invention provides a precise and targeted charging device and method for mining blasting boreholes.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A precision-targeted charging device for mining blasting boreholes includes a temporary storage tank. The top of the storage tank has a through-hole for adding explosives, and the bottom of the storage tank has a guide cylinder that can slide up and down along it. A filling bag adapted for filling explosives is fitted onto the guide cylinder. A friction ring is provided on the lower outer circumference of the guide cylinder. A pressing assembly for lifting the filling bag is provided on the guide cylinder. The pressing assembly includes a fixing ring, a mounting frame, a push rod, and a torsion spring I. The fixing ring is fixedly installed on the middle outer circumference of the guide cylinder. The mounting frame is located on the outside of the guide cylinder and fixedly connected to the lower part of the fixing ring. Multiple push rods that can rotate around the mounting frame are mounted on the mounting frame. Torsion springs I are respectively provided between the connection points of the push rods and the mounting frame. One end of the torsion spring I is fixed to the push rod, and the other end of the torsion spring I is fixed to the mounting frame.

[0008] As a preferred embodiment of the present invention, the filling bag has a retractable and foldable structure.

[0009] As a preferred embodiment of the present invention, the precise positioning mining blasting borehole charging device further includes a top frame, which is disposed on the outside of the guide cylinder. The top frame is located above the mounting frame and can slide up and down between the fixing ring and the mounting frame. The upper ends of the top rods are all located on the inner side of the top frame and abut against the inner side of the top frame, and the lower ends of the top rods abut against the outer circular wall of the friction ring.

[0010] As a preferred embodiment of the present invention, the precise positioning mining blasting borehole charging device further includes a lifting assembly, which includes a stepper motor, a sleeve, a gear set, a threaded rod, and a fixing plate. The stepper motor is fixedly installed on the top of the temporary storage tank, the sleeve is vertically installed inside the temporary storage tank and rotates with the temporary storage tank, the power output shaft of the stepper motor is connected to the top of the sleeve through the gear set, the fixing plate is fixedly installed inside the guide cylinder, the fixing plate is located below the bottom of the sleeve, the threaded rod passes through the fixing plate and slides with the fixing plate in the vertical direction, and the upper part of the threaded rod extends into the sleeve and is threadedly connected to the inner wall of the sleeve.

[0011] As a preferred embodiment of the present invention, the threaded rod has symmetrical grooves on both sides in the vertical direction, the fixing plate has a guide hole in the middle for the threaded rod to pass through, and sliders are symmetrically arranged on both sides of the guide hole. The sliders on both sides of the guide hole extend into the corresponding grooves on both sides of the threaded rod and slide in cooperation with the corresponding grooves.

[0012] As a preferred embodiment of the present invention, the precise positioning mining blasting borehole charging device further includes a material blocking assembly, which includes a flap, a torsion spring II, and a top block; flaps capable of sealing the inner hole of the guide cylinder are symmetrically and rotatably installed on both sides of the fixed plate, and torsion springs II are respectively provided between the connection points of the two flaps and the fixed plate. One end of the torsion spring II is fixedly connected to the flap, and the other end of the torsion spring II is fixedly connected to the fixed plate. A top block is fixedly installed at the bottom of the threaded rod, and the two ends of the top block abut against the bottom of the two flaps respectively.

[0013] As a preferred embodiment of the present invention, the precise positioning mining blasting hole charging device further includes a connecting frame and scrapers. The connecting frame is splined onto the outer cylindrical wall of the sleeve, and the outer end of the connecting frame is provided with a plurality of scrapers that are in contact with and slide against the inner wall of the temporary storage tank.

[0014] As a preferred embodiment of the present invention, the precise positioning mining blasting borehole charging device further includes a return spring. The top end of the guide cylinder is configured with a corrugated top surface in the circumferential direction. The bottom of the scraper abuts against the corrugated top surface of the guide cylinder. The return spring is sleeved on the upper outer side of the guide cylinder. The top end of the return spring presses against the bottom of the temporary storage tank. The bottom end of the return spring presses against the fixing ring.

[0015] As a preferred embodiment of the present invention, the precise positioning mining blasting borehole charging device further includes rollers, with rollers rotatably mounted on the bottom of each scraper, and the rollers abutting against the corrugated top surface of the guide cylinder.

[0016] A method for precisely targeting and charging explosives in mining blasting holes, the method employing the aforementioned precisely targeting and charging device for mining blasting holes, the method comprising the following steps:

[0017] S1: First, fill the explosive agent into the temporary storage tank through the through hole. At this time, the threaded rod is located in the sleeve, and the top block presses against the two flaps to block the guide cylinder, so that the guide cylinder is in a closed state and the torsion spring II is in a deformed state. Then, pull the top frame upward along the mounting frame. The top frame drives the top rod to rotate around the mounting frame. The bottom of the top rod flips away from the friction ring, and the torsion spring I will deform. Put the filling bag on the guide cylinder from the bottom upward. After releasing, the torsion spring I will return to its original position and the bottom of the top rod will close towards the friction ring, thereby clamping and fixing the filling bag. This completes the installation of the filling bag. Then, seal the bottom of the filling bag with a rope to complete the preparation work.

[0018] S2: Place this device above the blast hole, aligning the seal at the bottom of the filling bag with the blast hole. Then start the stepper motor. The power output shaft of the stepper motor will drive the sleeve to rotate synchronously through the gear set. The sleeve will move the threaded rod downward through the thread. The threaded rod will move downward along the fixed plate through the slide groove on it. The top block will also move downward synchronously. The top block will lose its support on the two flaps. The torsion spring II will reset and cause the two flaps to flip downward, thereby opening the guide cylinder. The explosive agent in the temporary storage tank will fall into the filling bag along the guide cylinder, thus starting the filling of the explosive agent.

[0019] S3: The filling bag will extend downward under the action of gravity, thereby inserting into the corresponding blasting hole. As the threaded rod moves downward, the threaded rod will push the filling bag downward through the top block. During this process, as the filling bag extends downward, the top rod will lift the filling bag under the elastic action of the torsion spring I. The friction ring will also reduce the speed of the filling bag release through friction and the squeezing force at the bottom of the top rod.

[0020] S4: As the sleeve rotates, the sleeve will drive the connecting frame to rotate synchronously through the spline. The connecting frame will drive the scraper to stir the lower part of the temporary storage tank. As the scraper rotates, the roller installed at the bottom of the scraper will push the guide cylinder along the top surface of the corrugated top. The guide cylinder will move up and down along the temporary storage tank under the elastic action of the return spring.

[0021] S5: When the filling bag is fully inserted into the corresponding hole, it indicates that the hole has been filled. Then, the stepper motor is rotated in reverse, the threaded rod is retracted into the sleeve, and the top block will push the two flaps to block the guide cylinder again. After the filling bag is cut and sealed, the filling of the blasting agent for a blasting hole is completed.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] 1. This invention involves loading explosives at the blasting site, allowing for adjustments to the explosive dosage based on borehole size, depth, and surrounding geological conditions. This meets the loading requirements for different boreholes, achieving precise, targeted loading. Simultaneously, a loading bag is used to receive the explosives, separating them from the mine opening and preventing moisture or contamination, thus ensuring the explosive's detonation effect.

[0024] 2. This invention uses the rotation of the sleeve to move the threaded rod upward or downward, thereby controlling the opening and closing of the feed cylinder by the contact between the top block and the flap plate, thus controlling the filling of the explosive agent. When the threaded rod moves downward, it pushes the filling bag downward to open it, so that the filling bag can fully fill the corresponding holes, thereby ensuring the completeness and accuracy of the explosive agent filling.

[0025] 3. The present invention drives the scraper to rotate synchronously when the sleeve rotates, thereby agitating the lower part of the temporary storage tank with the scraper to prevent the explosive agent from clogging in the temporary storage tank. When the scraper rotates, it pushes the guide cylinder along the top surface of the corrugation to move up and down reciprocally. This up and down shaking of the guide cylinder improves the smoothness of the explosive agent filling and thus improves the filling efficiency of the explosive agent. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0028] Figure 3 This is a partial structural schematic diagram of the cross-section of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the guide cylinder and friction ring of the present invention;

[0030] Figure 5 This is a schematic diagram of the material pressing assembly of the present invention;

[0031] Figure 6 This is a schematic diagram of the material pressing assembly and top frame of the present invention;

[0032] Figure 7 This is a schematic diagram of the lifting assembly of the present invention;

[0033] Figure 8 This is a schematic diagram of the lifting assembly and the baffle assembly of the present invention;

[0034] Figure 9 This is a schematic diagram of the material blocking assembly of the present invention.

[0035] Figure 10 This is a schematic diagram of the structure of the connecting frame, scraper, rollers, and other components of the present invention.

[0036] In the diagram, 1—temporary storage tank; 2—guide cylinder; 2a—corrugated top surface; 3—filling bag; 4—friction ring; 501—fixed ring; 502—mounting bracket; 503—top rod; 504—torsion spring I; 6—top frame; 701—stepper motor; 702—sleeve; 703—gear set; 704—threaded rod; 704a—slide groove; 705—fixed plate; 801—flip plate; 802—torsion spring II; 803—top block; 901—connecting frame; 902—scraper; 903—roller; 904—return spring. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1-6 As shown, a precision-targeted charging device for mining blasting boreholes includes a storage tank 1, a guide cylinder 2, a filling bag 3, a friction ring 4, and a pressing assembly. The storage tank 1 has a through-hole at the front of its top for adding the explosive. The bottom of the storage tank 1 has a guide cylinder 2 that can slide up and down along it. A filling bag 3, adapted for filling the explosive, is fitted onto the guide cylinder 2. The filling bag 3 is located below the storage tank 1 and has a retractable and foldable structure. A friction ring 4 is circumferentially located at the lower part of the guide cylinder 2. The outer circumferential surface of the friction ring 4 is roughened, increasing the friction between the friction ring 4 and the filling bag 3 as the bag slides downwards. The guide cylinder 2 is equipped with a pressing assembly for lifting the filling bag 3. The pressing assembly includes a fixing ring 501, a mounting frame 502, a push rod 503, and a torsion spring I 504. The fixing ring 501 is fixedly installed on the outer circle of the middle part of the guide cylinder 2. The mounting frame 502 is located on the outside of the guide cylinder 2 and is fixedly connected to the bottom of the fixing ring 501 by a sliding rod. Multiple push rods 503 that can rotate around the mounting frame 502 are installed on the mounting frame 502 along the circumference. A torsion spring I 504 is provided between the connection between the push rod 503 and the mounting frame 502. One end of the torsion spring I 504 is fixed to the push rod 503, and the other end of the torsion spring I 504 is fixed to the mounting frame 502. The lower end of the push rod 503 is made of silicone to increase friction.

[0039] like Figure 1 , Figure 2 and Figure 6 As shown, the precise-point mining blasting borehole charging device also includes a top frame 6. The top frame 6 is located outside the guide cylinder 2, above the mounting frame 502, and can slide up and down between the fixing ring 501 and the mounting frame 502. In this embodiment, four sliding rods are vertically fixed at the bottom of the fixing ring 501, and the mounting frame 502 is fixedly installed below the fixing ring 501 by the four sliding rods. Four guide cylinders are provided on the inner wall of the top frame 6, and the guide cylinders are sleeved on the corresponding... The four push rods 503 are evenly distributed on the inner side of the mounting frame 502 and rotate in coordination with the mounting frame 502. The upper ends of the push rods 503 are all located on the inner side of the top frame 6 and abut against the inner side of the top frame 6 (i.e., the upper ends of the push rods 503 press on the inner side of the top frame 6 and slide in coordination with the inner side of the top frame 6). The lower ends of the push rods 503 abut against the outer circular wall of the friction ring 4 (i.e., the lower ends of the push rods 503 press against the outer circular wall of the friction ring 4). When the top frame 6 is moved upward, the top frame 6 will drive the four push rods 503 to rotate synchronously around the mounting frame 502.

[0040] like Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the precise-point mining blasting borehole charging device also includes a lifting assembly, which comprises a stepper motor 701, a sleeve 702, a gear set 703, a threaded rod 704, and a fixing plate 705. The stepper motor 701 is fixedly installed on the top of the temporary storage tank 1. The sleeve 702 is vertically installed inside the temporary storage tank 1 and rotates with the temporary storage tank 1. The sleeve 702 is located on the axis of the temporary storage tank 1, and its top end extends upward beyond the top of the temporary storage tank 1 and rotates with the top of the temporary storage tank 1. The power output shaft of the stepper motor 701 is connected to the top of the sleeve 702 through the gear set 703. In this embodiment, the gear set 703 includes gear I and gear II. The power output shaft of the stepper motor 701 is vertically upward. Gear I is installed on the power output shaft of the stepper motor 701, and gear II is installed on the top of the sleeve 702. Gear I and gear II mesh with each other. A fixing plate 705 is fixedly installed in the lower part of the guide cylinder 2. The fixing plate 705 is located below the bottom of the sleeve 702. The threaded rod 704 passes through the fixing plate 705 and slides in the vertical direction with the fixing plate 705. The upper part of the threaded rod 704 extends into the sleeve 702 and is threadedly connected to the inner wall of the sleeve 702. The inner wall of the sleeve 702 is provided with internal threads. The sleeve 702 is screwed onto the threaded rod 704. In this embodiment, the two sides of the threaded rod 704 are symmetrically provided with sliding grooves 704a in the vertical direction. The middle part of the fixing plate 705 is provided with a guide hole for the threaded rod 704 to pass through. The two sides of the guide hole are symmetrically provided with sliders. The sliders on both sides of the guide hole extend into the corresponding sliding grooves 704a on both sides of the threaded rod 704 and slide in the vertical direction with the corresponding sliding grooves 704a.

[0041] like Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, the precise-point mining blasting borehole charging device also includes a material-blocking assembly, which includes a flap 801, a torsion spring II 802, and a top block 803. A flap 801 capable of sealing the inner hole of the guide cylinder 2 is symmetrically and rotatably installed on both sides of the fixed plate 705. A torsion spring II 802 is respectively installed between the connection points of the two flaps 801 and the fixed plate 705. One end of the torsion spring II 802 is fixedly connected to the flap 801, and the other end is fixedly connected to the fixed plate 705. A top block 803 is fixedly installed at the bottom of the threaded rod 704. Both ends of the top block 803 abut against the bottoms of the two flaps 801 respectively (i.e., one end of the top block 803 abuts against one flap 801, and the other end of the top block 803 abuts against the other flap 801).

[0042] like Figure 2 and Figure 10As shown, the precise-point mining blasting borehole charging device also includes a connecting frame 901 and scrapers 902. The connecting frame 901 is splined onto the outer cylindrical wall of the lower part of the sleeve 702. When the sleeve 702 rotates, it drives the connecting frame 901 to rotate synchronously through the spline. The outer end of the connecting frame 901 is provided with multiple scrapers 902 that are in contact with and slide against the inner wall of the temporary storage tank 1.

[0043] like Figure 2 , Figure 3 and Figure 10 As shown, the precise-point charging device for mining blasting boreholes also includes a return spring 904. The top of the feed cylinder 2 is corrugated with a corrugated top surface 2a in the circumferential direction. The bottom of the scraper 902 abuts against the corrugated top surface 2a of the feed cylinder 2. When the scraper 902 rotates, it pushes the feed cylinder 2 up and down through the corrugated top surface 2a. The return spring 904 is fitted onto the upper outer side of the feed cylinder 2, with its top end pressing against the bottom of the temporary storage tank 1 and its bottom end pressing against the fixing ring 501.

[0044] like Figure 2 and Figure 10 As shown, the precise positioning mining blasting borehole charging device also includes rollers 903. Each scraper 902 has a roller 903 rotatably mounted on its bottom. The rollers 903 abut against the corrugated top surface 2a of the guide cylinder 2 (i.e., the rollers 903 press against the corrugated top surface 2a of the guide cylinder 2 and roll in cooperation with the corrugated top surface 2a). The rollers 903 reduce the friction between the bottom of the scraper 902 and the corrugated top surface 2a, thereby improving the smoothness of the movement of the guide cylinder 2. In this way, the vibration of the guide cylinder 2 improves the loading efficiency of the blasting agent.

[0045] A method for precisely targeting and charging explosives in mining blasting holes, the method employing the aforementioned precisely targeting and charging device for mining blasting holes, the method comprising the following steps:

[0046] S1: When it is necessary to fill the blasting hole with explosives during mining, first fill the blasting agent into the temporary storage tank 1 through the through hole. At this time, the threaded rod 704 is located inside the sleeve 702, and the top block 803 presses against the two flaps 801 to block the guide cylinder 2, so that the guide cylinder 2 is in a closed state. The torsion spring II 802 is in a deformed state. Then, pull the top frame 6 upward along the mounting frame 502. The top frame 6 drives the top rod 503 to rotate around the mounting frame 502. The bottom of the top rod 503 flips away from the friction ring 4, and the torsion spring I 504 will deform. The filling bag 3 is put on the guide cylinder 2 from the bottom upward. After releasing, the torsion spring I 504 will return to its original position, so that the bottom of the top rod 503 closes towards the friction ring 4, thereby clamping and fixing the filling bag 3. This completes the installation of the filling bag 3. Then, the lower end of the filling bag 3 is sealed with a rope to complete the preparation work.

[0047] S2: Place this device above the blasting hole, aligning the seal at the bottom of the filling bag 3 with the blasting hole. Then start the stepper motor 701. The power output shaft of the stepper motor 701 will drive the sleeve 702 to rotate synchronously through the gear set 703. The sleeve 702 will cause the threaded rod 704 to move downward through the thread. The threaded rod 704 will move downward along the fixed plate 705 through the sliding groove 704a on it. The top block 803 will also move downward synchronously. The top block 803 will lose its support on the two flaps 801. The torsion spring II 802 will reset and cause the two flaps 801 to flip downward, thereby opening the guide cylinder 2. The explosive agent in the temporary storage tank 1 will fall into the filling bag 3 along the guide cylinder 2, thus starting the filling of the explosive agent.

[0048] S3: The filling bag 3 will extend downward under the action of gravity, thereby inserting into the corresponding blasting hole. As the threaded rod 704 moves downward, the threaded rod 704 will push the filling bag 3 downward through the top block 803. During this process, as the filling bag 3 extends downward, the top rod 503 will lift the filling bag 3 under the elastic action of the torsion spring I 504. The friction ring 4 will also reduce the release speed of the filling bag 3 through friction and the squeezing force at the bottom of the top rod 503, thereby preventing the filling bag 3 from suddenly falling off during the filling process. It also prevents the part of the filling bag 3 located below the guide cylinder 2 from wrinkling during the filling process, which would affect the filling amount and thus the blasting effect, thereby ensuring the stability of the filling bag 3.

[0049] S4: As the sleeve 702 rotates, the sleeve 702 will drive the connecting frame 901 to rotate synchronously through the spline. The connecting frame 901 will drive the scraper 902 to stir the lower part of the temporary storage tank 1, thereby preventing the explosive agent from being blocked in the temporary storage tank 1. As the scraper 902 rotates, the roller 903 installed at the bottom of the scraper 902 will push the guide cylinder 2 along the corrugated top surface 2a to move. The guide cylinder 2 will move up and down along the temporary storage tank 1 under the elastic action of the return spring 904.

[0050] S5: When the filling bag 3 is fully inserted into the corresponding hole, it indicates that the hole has been filled. Then, the stepper motor 701 is rotated in reverse, the threaded rod 704 is retracted into the sleeve 702, and the top block 803 will push the two flaps 801 to block the guide cylinder 2 again. After the filling bag 3 is cut and sealed, the filling of the blasting agent for a blasting hole is completed.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A precise, point-based charging device for mining blasting boreholes, characterized in that, The device includes a temporary storage tank (1), the top of which has a through hole for adding medicine, and the bottom of which has a guide cylinder (2) that can slide up and down. A filling bag (3) adapted to be filled with medicine is fitted on the guide cylinder (2). A friction ring (4) is provided on the lower outer circle of the guide cylinder (2). A pressing assembly for lifting the filling bag (3) is provided on the guide cylinder (2). The pressing assembly includes a fixing ring (501), a mounting bracket (502), a push rod (503), and a torsion spring I (504). (501) is fixedly installed on the outer circle of the middle part of the guide cylinder (2). The mounting frame (502) is set on the outside of the guide cylinder (2) and fixedly connected to the bottom of the fixing ring (501). Multiple top rods (503) that can rotate around the mounting frame (502) are installed on the mounting frame (502). Torsion springs I (504) are respectively provided between the connection between the top rod (503) and the mounting frame (502). One end of the torsion spring I (504) is fixed on the top rod (503), and the other end of the torsion spring I (504) is fixed on the mounting frame (502). The filling bag (3) has a retractable and foldable structure; It also includes a top frame (6), which is located on the outside of the guide cylinder (2). The top frame (6) is located above the mounting frame (502) and can slide up and down between the fixing ring (501) and the mounting frame (502). The upper ends of the top rods (503) are all located on the inside of the top frame (6) and abut against the inside of the top frame (6). The lower ends of the top rods (503) abut against the outer circular wall of the friction ring (4). As the filling bag (3) extends downwards and expands, the top rod (503) will lift the filling bag (3) under the elastic action of the torsion spring I (504), and the friction ring (4) will also reduce the release speed of the filling bag (3) through friction and the squeezing force at the bottom of the top rod (503).

2. The precise-point charging device for mining blasting boreholes according to claim 1, characterized in that, It also includes a lifting assembly, which includes a stepper motor (701), a sleeve (702), a gear set (703), a threaded rod (704), and a fixing plate (705). The stepper motor (701) is fixedly installed on the top of the temporary storage tank (1). The sleeve (702) is vertically installed inside the temporary storage tank (1) and rotates with the temporary storage tank (1). The power output shaft of the stepper motor (701) is connected to the top of the sleeve (702) through the gear set (703). The fixing plate (705) is fixedly installed inside the guide cylinder (2). The fixing plate (705) is located below the bottom of the sleeve (702). The threaded rod (704) passes through the fixing plate (705) and slides with the fixing plate (705) in the vertical direction. The upper part of the threaded rod (704) extends into the sleeve (702) and is threadedly connected to the inner wall of the sleeve (702).

3. The precise-point charging device for mining blasting boreholes according to claim 2, characterized in that, The threaded rod (704) has symmetrical grooves (704a) on both sides in the vertical direction. The middle part of the fixing plate (705) has a guide hole for the threaded rod (704) to pass through. Slider blocks are symmetrically arranged on both sides of the guide hole. The sliders on both sides of the guide hole extend into the corresponding grooves (704a) on both sides of the threaded rod (704) and slide in cooperation with the corresponding grooves (704a).

4. The precise-point charging device for mining blasting boreholes according to claim 3, characterized in that, It also includes a material blocking assembly, which includes a flap (801), a torsion spring II (802) and a top block (803); the two sides of the fixed plate (705) are symmetrically and rotatably equipped with flaps (801) that can block the inner hole of the guide cylinder (2), and torsion springs II (802) are respectively provided between the connection between the two flaps (801) and the fixed plate (705). One end of the torsion spring II (802) is fixedly connected to the flap (801), and the other end of the torsion spring II (802) is fixedly connected to the fixed plate (705). The bottom of the threaded rod (704) is fixedly installed with a top block (803), and the two ends of the top block (803) abut against the bottom of the two flaps (801) respectively.

5. The precise-point charging device for mining blasting boreholes according to claim 4, characterized in that, It also includes a connecting frame (901) and a scraper (902). The connecting frame (901) is sleeved on the outer circular wall of the sleeve (702) by a spline. The outer end of the connecting frame (901) is provided with a plurality of scrapers (902) that are attached to the inner wall of the temporary storage tank (1) and slide in cooperation with the inner wall of the temporary storage tank (1).

6. The precise-point charging device for mining blasting boreholes according to claim 5, characterized in that, It also includes a return spring (904), the top of the guide cylinder (2) is set as a corrugated top surface (2a) in the circumferential direction, the bottom of the scraper (902) abuts against the corrugated top surface (2a) of the guide cylinder (2), the return spring (904) is sleeved on the upper outer side of the guide cylinder (2), the top of the return spring (904) presses against the bottom of the temporary storage tank (1), and the bottom of the return spring (904) presses against the fixing ring (501).

7. The precise-point charging device for mining blasting boreholes according to claim 6, characterized in that, It also includes rollers (903), with rollers (903) rotatably mounted on the bottom of each scraper (902), and the rollers (903) abutting against the corrugated top surface (2a) of the guide cylinder (2).

8. A method for precisely targeting and charging explosives into blasting holes in mining operations, characterized in that, This method employs a precise, targeted mining blasting borehole charging device as described in claim 7, and includes the following steps: S1: First, fill the explosive agent into the temporary storage tank (1) through the through hole. At this time, the threaded rod (704) is located in the sleeve (702). The top block (803) presses against the two flaps (801) to block the guide cylinder (2), so that the guide cylinder (2) is in a closed state. The torsion spring II (802) is in a deformed state. Then, pull the top frame (6) upward along the mounting frame (502). The top frame (6) drives the top rod (503) to rotate around the mounting frame (502). The bottom of the top rod (503) Flip away from the friction ring (4), and the torsion spring I (504) will deform. Put the filling bag (3) on the guide cylinder (2) from the bottom upward. After releasing, the torsion spring I (504) will reset and the bottom of the top rod (503) will close towards the friction ring (4), thereby clamping and fixing the filling bag (3) to complete the installation of the filling bag (3). Then, seal the bottom of the filling bag (3) with a rope to complete the preparation work. S2: Place this device above the blasting hole, align the seal at the bottom of the filling bag (3) with the blasting hole, and then start the stepper motor (701). The power output shaft of the stepper motor (701) will drive the sleeve (702) to rotate synchronously through the gear set (703). The sleeve (702) will cause the threaded rod (704) to move downward through the thread. The threaded rod (704) will move downward along the fixed plate (705) through the slide groove (704a) on it. The top block (803) will also move downward synchronously. The top block (803) will lose its support on the two flaps (801). The torsion spring II (802) will reset and cause the two flaps (801) to flip downward, thereby opening the guide cylinder (2). The blasting agent in the temporary storage tank (1) will fall into the filling bag (3) along the guide cylinder (2), thus starting the filling of the blasting agent. S3: The filling bag (3) will extend downward under the action of gravity, thereby inserting into the corresponding blasting hole. As the threaded rod (704) moves downward, the threaded rod (704) will push the filling bag (3) downward through the top block (803). During this period, as the filling bag (3) extends downward, the top rod (503) will lift the filling bag (3) under the elastic action of the torsion spring I (504). The friction ring (4) will also reduce the speed of the filling bag (3) by friction in conjunction with the squeezing force at the bottom of the top rod (503). S4: As the sleeve (702) rotates, the sleeve (702) will drive the connecting frame (901) to rotate synchronously through the spline. The connecting frame (901) will drive the scraper (902) to stir the lower part of the temporary storage tank (1). As the scraper (902) rotates, the roller (903) installed at the bottom of the scraper (902) will push the guide cylinder (2) along the corrugated top surface (2a) to move. The guide cylinder (2) will move up and down along the temporary storage tank (1) under the elastic action of the return spring (904). S5: When the filling bag (3) is fully inserted into the corresponding hole, it indicates that the hole has been filled. Then, the stepper motor (701) is rotated in the opposite direction, the threaded rod (704) is retracted into the sleeve (702), and the top block (803) will push the two flaps (801) to block the guide cylinder (2) again. After the filling bag (3) is filled, it is cut off and sealed to complete the filling of the blasting agent for a blasting hole.

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