Coal mine deep hole blasting charging device and charging method

Abstract

The invention discloses a coal mine deep hole blasting charging device and charging method, and belongs to the technical field of coal mine deep hole blasting, the coal mine deep hole blasting charging device comprises a charging pipe and a plurality of explosive blocking arms, the inner wall of the charging pipe is connected with a detonating cord mounting pipe and a plurality of rotating rod mounting pipes, and rotating rods are rotationally mounted in the rotating rod mounting pipes; a blocking arm mounting notch is formed in the side wall of the rotating rod mounting pipe; the explosive blocking arm is connected with the rotating rod and can be driven by the rotating rod to rotate in the blocking arm mounting notch; the explosive blocking arm is of an arc-shaped structure matched with the inner wall of the explosive charging pipe. During use, a detonating cord is placed in the detonating cord mounting pipe, and the charging pipe is placed in a drill hole; the explosive charge is loaded into the charge tube, and the operation rotating rod is rotated to drive the explosive blocking arm to rotate, so that the explosive blocking arm blocks and supports the explosive charge, and air interval charge is realized. The explosive charging pipe provides a smooth explosive charging path space for the explosive packages, and high efficiency and safety of explosive charging are achieved; the interval of explosives can be accurately controlled, displacement of explosive packages is avoided, the blasting effect is guaranteed, and potential safety hazards are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine deep hole blasting, in particular to a coal mine deep hole blasting charging device and a charging method. Background Art

[0002] Deep-hole blasting refers to blasting operations with a blasthole diameter greater than 50mm and a depth greater than 5m. In the coal mining industry, deep-hole blasting is a key rock-breaking method, widely used in tunneling, pre-splitting blasting at coal faces, and other processes. With the continuous increase in coal mining depth and the increasing demand for mining efficiency, the application of deep-hole blasting technology has become increasingly frequent, placing higher demands on the quality and efficiency of deep-hole blasting charging operations.

[0003] Deep hole blasting can be divided into the following types according to the charge structure: 1. Continuous charging. Explosives are continuously loaded into the blasthole, forming a continuous columnar charge within the hole. Continuous charging is a commonly used charging method due to its simple structure and easy operation. It is commonly used in deephole blasting in coal mines, where the rock mass is relatively homogeneous and the blasting requirements are relatively simple, such as in mining blasting in some common coal seams. This charging method concentrates the release of explosive energy, generating a large explosive impact force and effectively fragmenting the rock mass. However, due to the concentrated explosive charge, it can lead to excessive fragmentation or vibration in soft rock or areas requiring high vibration control during blasting.

[0004] 2. Interval charging. The explosives are divided into several sections within the blasthole, separated by air, water, or other inert materials, to form a charge structure with multiple charges spaced apart. Interval charging effectively controls the release of explosive energy, distributing the explosive energy more evenly within the rock mass. In coal mining, for rocks with high hardness and specific requirements for blasting fragmentation, interval charging can prevent excessive rock fragmentation caused by excessive concentration of explosives and reduce the rate of large fragments. Interval charging also reduces the intensity of blasting vibration, which is important when mining near residential areas or in vibration-sensitive areas. By properly adjusting the interval length and charge position, the blasting effect can be optimized and the quality of rock fragmentation can be improved.

[0005] Traditional air-gap charging relies on manual experience to load and control the explosive spacing. During actual construction, due to the inability to observe the specific conditions within the hole, the explosive spacing cannot be accurately controlled, and the explosive packages are prone to shifting, resulting in unsatisfactory blasting results and even safety hazards. Furthermore, due to uneven rock quality, the inner wall of the drilled hole is often uneven, which leads to uneven charging and seriously affects charging efficiency. Summary of the Invention

[0006] In order to solve the problems of traditional air-gap charging, the explosive interval cannot be accurately controlled, the explosive package is easily shifted, resulting in unsatisfactory blasting effect and even safety hazards, and the charging is not smooth, which seriously affects the charging efficiency, the present invention provides a coal mine deep hole blasting charging device and charging method.

[0007] On the one hand, the present invention is achieved through the following technical solutions: A coal mine deep hole blasting charging device comprises a cylindrical charging tube and a plurality of explosive stop arms, wherein the inner wall of the charging tube is connected with a detonating cord mounting tube and a plurality of rotating rod mounting tubes in the same direction as the axis thereof at annular intervals, wherein a rotating rod is rotatably mounted in the rotating rod mounting tube; a stop arm mounting slot for the explosive stop arm to pass through is provided on the side wall of the rotating rod mounting tube; the explosive stop arm is connected and mounted with the rotating rod and can be driven to rotate in the stop arm mounting slot by the rotating rod; the explosive stop arm is in an arc-shaped structure that fits the inner wall of the charging tube.

[0008] A further improvement of the present invention is that one end of the rotating rod is provided with an insertion shaft with a non-circular cross section, one end of the explosive blocking arm is connected with a blocking arm connecting seat, and the blocking arm connecting seat is provided with a slot for inserting the insertion shaft.

[0009] A further improvement of the present invention is that an end of the insertion shaft away from the rotating rod is provided with a chamfer.

[0010] A further improvement of the present invention is that an operating rod is connected to one end of the rotating rod away from the insertion shaft.

[0011] A further improvement of the present invention is that one end of the charge tube is connected to a guide portion which is in the shape of a tapered cylinder and gradually contracts in a direction away from the charge tube.

[0012] A further improvement of the present invention is that a slit is provided on the side wall of the charge tube along the axis direction thereof, and a first buckle and a second buckle that can engage with each other are respectively provided on both sides of the slit.

[0013] A further improvement of the present invention is that a second notch is provided on the side wall of the detonating cord installation tube, facing the axial center line of the charge tube.

[0014] A further improvement of the present invention is that the opening size of the second notch is smaller than the inner diameter of the detonating cord installation tube.

[0015] A further improvement of the present invention is that a plurality of through holes are provided on the side wall of the charge tube.

[0016] Another aspect of the present invention is achieved through the following technical solutions: A coal mine deep hole blasting charging method comprises the following steps: S1: The first buckle and the second buckle engage with each other, the detonating cord is placed in the detonating cord installation tube, the guide portion faces the drill hole, and the charge tube is completely placed in the drill hole; S2: using an expansion device to expand the outer diameter of the charge tube to separate the first buckle from the second buckle; S3: Turn the adjusting lever to make all the explosive retaining arms fit against the inner wall of the charge tube; S4: Load the first cylindrical explosive package into the charging tube and to the bottom of the drill hole; S5: Load the remaining explosive packs into the charging tube, and at the same time rotate the rotating rod to drive the explosive blocking arm to rotate toward the middle, so that the explosive blocking arm at the corresponding position can stop and support the corresponding explosive pack, and the charging is completed.

[0017] It can be seen from the above technical solutions that the beneficial effects of the present invention are: During use, a detonating cord is placed in the detonating cord installation tube, and the charge tube is completely lowered into the cleaned borehole. All the rotating rods are rotated and adjusted to align all the explosive retaining arms with the inner wall of the charge tube. A cylindrical explosive package is loaded into the charge tube, and the operating rotating rod is simultaneously rotated to drive the explosive retaining arms toward the center, so that the corresponding explosive retaining arms can stop and support the corresponding explosive package, achieving accurate and reliable air-spaced charging. The cylindrical charge tube provides a smooth charging path for the explosive package, allowing it to reach the designated position smoothly and unobstructed, achieving efficient and safe charging and effectively avoiding problems caused by unevenness inside the deep hole. The detonating cord installation tube protects the detonating cord from damage during the charging process, thereby ensuring the accuracy and reliability of the blasting operation. At the same time, the detonating cord installation tube and several rotating rod installation tubes provide structural strength to the charge tube, similar to a rib structure, effectively preventing bending and deformation during insertion of the charge tube into the deep hole. The charging device has a simple structure and is easy to mass-produce. It can accurately control the interval between explosives, avoid displacement of explosive packages, ensure blasting effects, avoid safety hazards, and effectively improve the efficiency of charging operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0020] Figure 2 This is a schematic structural diagram of the outer end portion of the charge tube according to a specific embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the axial projection of the charge tube according to a specific embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the stopping state of the explosive blocking arm according to a specific embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the internal structure of a charge tube according to a specific embodiment of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the guide portion according to a specific embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the installation of the rotating rod and explosive retaining arm according to a specific embodiment of the present invention.

[0026] Figure 8 It is a schematic diagram of the plug-in shaft structure of a specific embodiment of the present invention.

[0027] In the accompanying drawings: 1. Charging tube, 11. Guide part, 12. Through hole, 13. First buckle, 14. Second buckle, 15. First notch, 2. Rotating rod mounting tube, 21. Stop arm mounting slot, 3. Detonating cord mounting tube, 31. Second notch, 4. Rotating rod, 41. Operating lever, 42. Insert shaft, 43. Chamfer, 5. Explosive stop arm, 51. Stop arm connecting seat, 52. Slot. DETAILED DESCRIPTION

[0028] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0029] like Figure 1-8 As shown, the present invention discloses a charging device for deep-hole blasting in coal mines, comprising a cylindrical charging tube 1 and a plurality of explosive retaining arms 5. The outer diameter of the charging tube 1 is slightly smaller than the inner diameter of the drilled hole to ensure smooth insertion. A detonating cord mounting tube 3 and a plurality of rotating rod mounting tubes 2 are connected to the inner wall of the charging tube 1 in an annular manner and aligned with the inner wall of the charging tube 1. A cylindrical rotating rod 4 is rotatably mounted within the rotating rod mounting tube 2. The rotating rod mounting tube 2 has a retaining arm mounting slot 21 formed on the side wall thereof for the explosive retaining arms 5 to pass through. The explosive retaining arms 5 are connected to the rotating rod 4 and can be driven by the rotating rod 4 to rotate within the retaining arm mounting slot 21 (along the circumference of the charging tube 1). The explosive retaining arms 5 have an arc-shaped structure that fits the inner wall of the charging tube 1.

[0030] During use, the detonating cord is placed in the detonating cord installation tube 3, and the charging tube 1 is completely placed in the cleaned drilled hole; all the rotating rods 4 are rotated and adjusted so that all the explosive blocking arms 5 fit with the inner wall of the charging tube 1 (to ensure smooth charging); a cylindrical explosive package is loaded into the charging tube 1 (which can be pushed inward by the push rod), and the operating rotating rod 4 is rotated at the same time to drive the explosive blocking arms 5 to rotate toward the middle (at a suitable angle, such as 60 degrees), so that the explosive blocking arms 5 at the corresponding position can stop and support the corresponding explosive package (the arc-shaped explosive blocking arms 5 can better fit the explosive package, provide stable supporting force, and prevent the explosive package from shifting in the charging tube 1), thereby achieving accuracy and reliability of air-gapped charging. The cylindrical charging tube 1 provides a smooth charging path for the explosive package, allowing it to reach the designated location smoothly and unobstructed, achieving efficient and safe charging and effectively avoiding problems with unevenness within the deep hole that could lead to unsmooth charging. The detonating cord mounting tube 3 protects the detonating cord, preventing damage during the charging process and thus ensuring the accuracy and reliability of the blasting operation. Furthermore, the detonating cord mounting tube 3 and the plurality of rotating rod mounting tubes 2 provide structural strength to the charging tube 1, similar to a rib structure, effectively preventing bending and deformation during insertion. This charging device has a simple structure and is easy to mass-produce. It can precisely control the spacing between the explosives, preventing shifting of the explosive packages, ensuring blasting effectiveness, and avoiding safety hazards. It also effectively improves the efficiency of the charging (blasting) operation.

[0031] Among them, all parts of this charging device are made of hard PVC or hard plastic material, can be injection molded, easy to mass produce, effectively reducing production costs, and directly decompose at high temperature after blasting, so it is disposable.

[0032] Among them, when the explosive stop arm 5 rotates toward the middle and reaches the support stop position (without crossing the axial centerline position of the charging tube 1), the side wall of the stop arm mounting slot 21 can stop the explosive stop arm 5, effectively ensuring the accuracy and reliability of the rotation adjustment of the explosive stop arm 5.

[0033] like Figure 6 As shown, the insertion end (inner end) of the charge tube 1 is connected to a guide portion 11 that is tapered in a direction away from the charge tube 1. The guide portion 11 is integrally injection-molded with the charge tube 1. During deep-hole blasting operations in coal mines, the internal space of the borehole is limited and the environment is complex. The tapered, tapered guide portion 11 serves as a guide, making it easier and more accurate to insert the charge tube 1 into the borehole. This reduces difficulties caused by angular deviation during insertion and improves the efficiency and accuracy of inserting the charge tube 1 into the borehole. The tapered guide portion 1 reduces friction and collision between the charge tube 1 and the inner wall of the borehole during insertion, thereby reducing damage to the inner wall of the borehole, maintaining the integrity of the borehole, and facilitating the smooth progress of subsequent blasting operations.

[0034] The side wall of the charge tube 1 is provided with a slit along its axis, with a first buckle 13 and a second buckle 14 respectively provided on both sides of the slit, which can engage with each other; and a first notch 15 corresponding to the slit is opened on the guide portion 11. In the initial state, the first clip 13 and the second clip 14 are separated, that is, the above-mentioned gap is large; before inserting the charging tube 1 into the drill hole, the elastic force of the charging tube 1 itself is overcome and the first clip 13 and the second clip 14 are engaged, so that the outer diameter of the charging tube 1 at this time is slightly smaller than the diameter of the drill hole, which can facilitate the insertion of the charging tube 1 into the drill hole; after the charging tube 1 is fully inserted, an expansion device (such as opening pliers or conical wooden blocks) is inserted into the charging tube 1 to expand its outer diameter, so that the second clip 14 is separated from the first clip 13 (further, the root of the second clip 14 is thinned, and the thinned position of the root of the second clip 14 will be deformed or broken, resulting in the disengagement of the first clip 13), and the charging tube 1 is tightly fitted with the inner wall of the drill hole under its own elastic deformation, thereby realizing reliable positioning of the charging tube 1 itself; and effectively increasing the diameter of the explosive packaging tube, thereby improving the convenience of explosive packaging.

[0035] A second notch 31 is formed on the side wall of the detonating cord installation tube 3, oriented toward the axis of the charge tube 1. This facilitates the installation of the detonating cord. In actual operation, when placing the detonating cord into the detonating cord installation tube 3, workers do not need to laboriously insert the detonating cord from one end of the detonating cord installation tube 3. Instead, they can place the detonating cord directly through the second notch 31, greatly improving the efficiency of detonating cord installation. In deep-hole blasting in coal mines, the detonating cord in the detonating cord installation tube 3 can more effectively transfer explosive energy to the surrounding explosive charges through the second notch 31, allowing the explosives to be detonated in a predetermined order and manner. This optimizes the transfer and distribution of blasting energy, helps improve the effectiveness and quality of blasting, better meets the rock crushing requirements of deep-hole blasting in coal mines, and achieves more uniform rock crushing and reduces the generation of large rock chunks.

[0036] Furthermore, the opening size of second notch 31 is smaller than the inner diameter of detonating cord mounting tube 3. This effectively prevents the detonating cord from accidentally dislodging through second notch 31, reliably restraining the detonating cord and ensuring it remains within detonating cord mounting tube 3, maintaining proper detonation function. The appropriate opening size further stabilizes the position of the detonating cord within detonating cord mounting tube 3, further improving the accuracy of its positioning within the tube.

[0037] The charging tube 1 is provided with a plurality of through-holes 12 (in an array) on its sidewall. During insertion of the charging tube 1 into the borehole, the air or other medium within the borehole is squeezed by the tube 1. These through-holes 12 allow the air or medium to pass through, preventing a sudden increase in pressure within the borehole and facilitating smoother insertion. At the moment of blasting, high-temperature, high-pressure gas diffuses through the through-holes 12, distributing the explosive energy more evenly throughout the rock mass. This improves the blasting effect, resulting in more complete and uniform rock fragmentation, reduces the generation of large rock chunks, and enhances coal mining efficiency.

[0038] Among them, one end of the rotating rod 4 is provided with an insertion shaft 42 with a non-circular cross-section (specifically, it can be a square cross-section, and its center is located on the axis of the rotating rod 4, and its circumscribed circle is smaller than the cross-sectional size of the rotating rod 4, thereby forming a step, which serves as an insertion stop), and one end of the explosive blocking arm 5 is connected to a blocking arm connecting seat 51, and the blocking arm connecting seat 51 is provided with a slot 52 for inserting the insertion shaft 42. The insertion and matching mode of the non-circular insertion shaft 42 and the slot 52 can effectively prevent the relative rotation between the rotating rod 4 and the explosive blocking arm 5, realize the accuracy and reliability of the rotation operation of the explosive blocking arm 5, accurately control the angle of the explosive blocking arm 5, and then accurately control the spacing position of the explosive package, ensure the stability and accuracy of the blasting charge structure, and improve the blasting effect. The insertion connection mode makes the installation and disassembly of the rotating rod 4 and the explosive blocking arm 5 more convenient, which not only improves the assembly efficiency of the device, but also facilitates the replacement of damaged parts in the later stage, reduces maintenance costs, and improves the practicality and maintainability of the entire charging device.

[0039] Furthermore, the end of the shaft 42 facing away from the rotating rod 4 is provided with a chamfer 43. This design of chamfer 43 facilitates alignment and insertion of the shaft 42 into the slot 52 of the barrier arm connector 51, acting as a guide and reducing the possibility of the shaft 42 becoming stuck or mis-inserted at the edge of the slot 52. Even in limited operating space and with poor visibility, the shaft 42 can be smoothly inserted into the slot 52, improving the convenience and efficiency of connecting the rotating rod 4 to the explosive barrier arm 5. Furthermore, chamfer 43 prevents the shaft 42 from damaging the edge of the slot 52 during insertion.

[0040] Furthermore, an operating lever 41 perpendicular to the rotating rod 4 is connected to one end away from the insertion shaft 42. The operating lever 41 provides an operator with a convenient location for applying force. During the deep hole blasting charging process in coal mines, since the charging tube 1 is located inside the borehole and the space is relatively narrow, it is difficult to directly rotate the rotating rod 4. The operating lever 41 greatly increases the length of the operator's force arm for rotating the rotating rod 4, effectively improving the convenience and efficiency of the charging operation. Through the operating lever 41, the operator can more accurately control the rotation angle of the rotating rod 4 and can finely adjust the rotation amplitude of the operating lever 41 according to actual needs, thereby accurately changing the position of the explosive blocking arm 5, ensuring that the spacing between the explosive packs meets the blasting design requirements, further ensuring the stability and reliability of the blasting effect, helping to achieve the expected rock crushing effect, and reducing blasting quality problems caused by improper spacing of the explosive packs.

[0041] In addition, when the explosive stop arm 5 is in contact with the inner wall of the charge tube 1, the operating rod 41 faces outward (outside the cut surface position) to avoid interference with the charge; when the operating rod 41 is rotated to face inward, the explosive stop arm 5 reaches the explosive package stop support position, which serves as a reminder to avoid the situation where the explosive stop arm 5 is not rotated into place.

[0042] Position marks corresponding to the explosive blocking arms 5 can be marked on the multiple operating rods 41 to avoid incorrect operations.

[0043] like Figure 3 、 4 As shown, in this embodiment, four rotating rod mounting tubes 2 are arranged in a circular array. The detonating cord mounting tube 3 is located between two adjacent rotating rod mounting tubes 2. The gap in the charge tube 1 is arranged opposite the detonating cord mounting tube 3. Two explosive retaining arms 5 on either side of the line connecting the detonating cord mounting tube 3 and the gap are respectively located between the two corresponding rotating rod mounting tubes 2 (when contacting the inner wall of the charge tube 1, they do not contact the detonating cord mounting tube 3 or the gap). The arc length of the explosive retaining arms 5 is slightly less than 90 degrees, ensuring sufficient length to reliably support and stop the explosive charge.

[0044] The present invention also discloses a coal mine deep hole blasting charging method, comprising the following steps: S1: The first buckle 13 and the second buckle 14 are engaged with each other, the detonating cord is placed in the detonating cord installation tube 3, the guide portion 11 is facing the drill hole, and the charge tube 1 is completely placed in the cleaned drill hole; S2: Using an expansion device to expand the outer diameter of the charge tube 1, so that the first buckle 13 and the second buckle 14 are separated; S3: Rotate the adjusting lever 4 so that all the explosive retaining arms 5 are in contact with the inner wall of the charge tube 1; S4: Load the first cylindrical explosive package into the charging tube 1 and to the bottom of the drill hole; S5: Load the remaining explosive packs into the charging tube 1, and at the same time rotate the rotating rod 4 to drive the explosive blocking arms 5 to rotate toward the middle, so that the explosive blocking arms 5 at the corresponding positions can stop and support the corresponding explosive packs.

[0045] This method for charging deep-hole blasting in coal mines seamlessly integrates every step, from preparing and opening the charging tube to packing and filling the explosives. It addresses the charging issues of traditional deep-hole blasting in coal mines, ensures favorable blasting conditions, and ensures accurate and safe charging, ultimately enabling safe and efficient blasting operations and improving blasting effectiveness.

[0046] The present coal mine deep hole blasting charging device and charging method are as follows: a detonating cord is placed in a detonating cord mounting tube 3, and a charging tube 1 is completely placed in a cleaned borehole; all rotating rods 4 are rotated and adjusted so that all explosive retaining arms 5 fit with the inner wall of the charging tube 1 (to ensure smooth charging); a cylindrical explosive bag is loaded into the charging tube 1 (which can be pushed inward by a push rod), and the operating rotating rod 4 is rotated at the same time to drive the explosive retaining arms 5 to rotate toward the middle (at a suitable angle, such as 60 degrees), so that the explosive retaining arms 5 at the corresponding position can provide stop support for the corresponding explosive bag (the arc-shaped explosive retaining arms 5 can better fit the explosive bag, provide stable support force, and prevent the explosive bag from shifting in the charging tube 1), thereby achieving accuracy and reliability in air-gap charging. The cylindrical charging tube 1 provides a smooth charging path for the explosive package, allowing it to reach the designated location smoothly and unobstructed, achieving efficient and safe charging and effectively avoiding problems with unevenness within the deep hole that could lead to unsmooth charging. The detonating cord mounting tube 3 protects the detonating cord, preventing damage during the charging process and thus ensuring the accuracy and reliability of the blasting operation. Furthermore, the detonating cord mounting tube 3 and the plurality of rotating rod mounting tubes 2 provide structural strength to the charging tube 1, similar to a rib structure, effectively preventing bending and deformation during insertion. This charging device has a simple structure and is easy to mass-produce. It can precisely control the spacing between the explosives, preventing shifting of the explosive packages, ensuring blasting effectiveness, and avoiding safety hazards. It also effectively improves the efficiency of the charging (blasting) operation.

[0047] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coal mine deep hole blasting charging device, characterized in that: The utility model comprises a cylindrical charge tube (1) and a plurality of explosive retaining arms (5); the inner wall of the charge tube (1) is connected with a detonating cord mounting tube (3) and a plurality of rotating rod mounting tubes (2) in the same direction as the axis thereof at annular intervals; a rotating rod (4) is rotatably mounted in the rotating rod mounting tube (2); a retaining arm mounting slot (21) for the explosive retaining arm (5) to pass through is provided on the side wall of the rotating rod mounting tube (2); the explosive retaining arm (5) is connected and mounted with the rotating rod (4) and can be driven by the rotating rod (4) to rotate in the retaining arm mounting slot (21); the explosive retaining arm (5) is in an arc-shaped structure that fits the inner wall of the charge tube (1).

2. The coal mine deep hole blasting charging device according to claim 1, characterized in that: One end of the rotating rod (4) is provided with an insertion shaft (42) with a non-circular cross section, and one end of the explosive blocking arm (5) is connected with a blocking arm connecting seat (51), and a slot (52) for inserting the insertion shaft (42) is provided on the blocking arm connecting seat (51).

3. The coal mine deep hole blasting charging device according to claim 2, characterized in that: An end of the insertion shaft (42) away from the rotating rod (4) is provided with a chamfer (43).

4. The coal mine deep hole blasting charging device according to claim 2, characterized in that: An operating rod (41) is connected to one end of the rotating rod (4) away from the insertion shaft (42).

5. The coal mine deep hole blasting charging device according to claim 1, characterized in that: One end of the charge tube (1) is connected to a guide portion (11) that is tapered in a direction away from the charge tube.

6. The coal mine deep hole blasting charging device according to claim 1, characterized in that: A slit is provided on the side wall of the charge tube (1) along the axis direction thereof, and a first buckle (13) and a second buckle (14) capable of engaging with each other are provided on both sides of the slit.

7. The coal mine deep hole blasting charging device according to claim 1, characterized in that: A second notch (31) is provided on the side wall of the detonating cord installation tube (3) and faces the axis of the charge tube (1).

8. The coal mine deep hole blasting charging device according to claim 7, characterized in that: The opening size of the second notch (31) is smaller than the inner diameter size of the detonating cord installation tube (3).

9. The coal mine deep hole blasting charging device according to claim 1, characterized in that: A plurality of through holes (12) are provided on the side wall of the charge tube (1).

10. A coal mine deep hole blasting charging method, characterized in that: The following steps are involved: S1: The first buckle (13) and the second buckle (14) are engaged with each other, the detonating cord is placed in the detonating cord installation tube (3), the guide portion (11) faces the drill hole, and the charge tube (1) is completely placed in the drill hole; S2: using an expansion device to expand the outer diameter of the charge tube (1) so as to separate the first buckle (13) and the second buckle (14); S3: Rotate the adjusting lever (4) so that all the explosive retaining arms (5) are in contact with the inner wall of the charge tube (1); S4: Load the first cylindrical explosive package into the charging tube (1) and to the bottom of the drill hole; S5: Load the remaining explosive packs into the charging tube (1), and simultaneously rotate the rotating rod (4) to drive the explosive blocking arm (5) to rotate toward the middle, so that the explosive blocking arm (5) at the corresponding position can stop and support the corresponding explosive pack, thereby completing the charging.

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