A hole sealing device for coal mine construction blasting bottom breaking

Abstract

This invention discloses a blast hole sealing device for blasting bottom fracturing in coal mine construction, including a support platform and a support plate. The connecting sleeve is placed on the outside of the joint between the first and second material conveying channels. A hook rod is fixed to one side of the connecting sleeve. The sealing mechanism passes through the bottom of the second material conveying channel and rests on the hook rod. This blast hole sealing device utilizes the second and first material conveying channels to transport blasting mud from the storage box into the blast hole. Simultaneously, the first material conveying channel slowly moves to the right to fill the blast hole with blasting mud. After the initial sealing operation is completed, the first sealing plate rotates and seals the first guide plate, and the second sealing plate rotates and seals the first guide plate. After removing the connecting sleeve and allowing the second rotating rod to leave the slot, the rotating plate can be rotated 180 degrees. Then, the moving rod and the tamping block move to the left and extend into the blast hole to facilitate tamping the blasting mud. The tamping and tamping operations can be repeated to make the sealing effect more compact and secure.

Description

Technical Field

[0001] This invention relates to the field of coal mine construction technology, specifically to a blast hole sealing device for blasting bottom cutting in coal mine construction. Background Technology

[0002] Mineral resource mining refers to the mining of solid metal and non-metal deposits, including open-pit mining of surface ore bodies and shallow ore bodies, and underground mining of blind mines and deep ore bodies. Blasting is a technique that uses the compression, loosening, destruction, throwing and killing effects produced by the explosion of explosives in air, water, soil and rock media or objects to achieve the expected purpose. Blasting devices are often used in coal mine construction. After blasting is completed, sealing devices are used to seal the blast holes.

[0003] Existing blast hole sealing devices generally require manual injection of blast mud into the blast hole, followed by manual tamping of the blast mud. The entire blast hole injection and tamping operation has a low degree of automation, is laborious to operate manually, and is not stable enough. Therefore, a blast hole sealing device for blasting bottom breaking in coal mine construction is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a blast hole sealing device for blasting bottom breaking in coal mine construction, so as to solve the problems mentioned in the background art. The existing blast hole sealing devices generally require manual injection of blast mud into the blast hole, followed by manual tamping of the blast mud. The entire blast mud injection and tamping operation has a low degree of automation, is laborious to operate manually, and is not stable enough.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a blast hole sealing device for blasting bottom cutting in coal mine construction, comprising a support platform and a support plate. A bracket is fixed to the bottom of the support platform, and the support plate is fixed between two brackets. A rotating plate is rotatably connected to one side of the support plate, and a first support sleeve is fixed to the top of the rotating plate. A first material conveying channel passes through the first support sleeve. First guide plates are symmetrically fixed to both sides inside the first material conveying channel. A first sleeve is fixed between the two first guide plates. A first rotating rod is rotatably connected to the inner side of the first sleeve. The first rotating rod passes through the first guide plates and the first sleeve and is connected to a first sealing plate. A first electric telescopic rod is fixed to the bottom of the support platform, and a push plate is fixed to one end of the first electric telescopic rod. The push plate is engaged with the bottom of the first material conveying channel. A storage container is placed on the support platform. The storage bin has a top plug threaded to its top. A connecting rod is fixed to one side of the storage bin, and the connecting rod engages with the top of the first conveying channel. A second conveying channel is fixed to the bottom inside the storage bin, penetrating one side of the storage bin. A second opening is provided at the top of the second conveying channel. A spiral rod is rotatably connected to the inside of the second conveying channel. A sealing mechanism is fixed to the bottom inside the second conveying channel. The end of the spiral rod is rotatably connected to the sealing mechanism, which engages with one of the first sealing plates. One side of the storage bin is connected to a connecting sleeve via a second electric telescopic rod. The connecting sleeve is placed on the outside of the joint between the first and second conveying channels. A hook rod is fixed to one side of the connecting sleeve. The sealing mechanism penetrates the bottom of the second conveying channel and rests on the hook rod.

[0006] Preferably, a first motor is fixed inside the support plate, and the output end of the first motor is connected to the rotating plate. A second support sleeve is fixed to the bottom of the rotating plate, and a moving rod passes through the second support sleeve. One end of the moving rod is fixed with a mud-tamping block by bolts.

[0007] By adopting the above technical solution, the turntable can rotate 180 degrees, making it convenient to switch between the first material conveying channel and the moving rod.

[0008] Preferably, a second motor is fixed inside the second conveying channel, and the output end of the second motor is connected to the screw rod.

[0009] By adopting the above technical solution, the rotation of the auger can assist in conveying the slurry to the left.

[0010] Preferably, the sealing mechanism includes a cover frame, which is fixed to the inner bottom of the second material conveying channel. The end of the spiral rod is rotatably connected to the cover frame. A third motor is fixed inside the cover frame, and the output end of the third motor is connected to a second rotating rod. A movable plate is rotatably connected to the outer side of the second rotating rod, and a second sleeve is engaged with the outer side of the second rotating rod. A second guide plate is fixed to the inner side of the second material conveying channel. The second sleeve passes through one side of the cover frame and the second guide plate and is connected to a second sealing plate. The second sealing plate is engaged with the outer side of the second rotating rod. The second rotating rod passes through the second sleeve and the second sealing plate and is engaged with a slot, which is located on one side of one of the first sealing plates.

[0011] By adopting the above technical solution, the first sealing plate can be rotated to facilitate sealing or opening the first guide plate, and the second sealing plate can be rotated to facilitate sealing or opening the second guide plate.

[0012] Preferably, a slide is provided at the bottom of the second material conveying channel, the movable plate is slidably connected in the slide, and the movable plate passes through the slide and rests on the hook rod.

[0013] By adopting the above technical solution, the slide rail plays a limiting role during the sliding process of the moving plate.

[0014] Preferably, a first opening is provided on one side of the support platform, and the push plate passes through the first opening.

[0015] By adopting the above technical solution, the first opening provides space for the push plate to move.

[0016] Preferably, a retaining sleeve is fixed at the bottom of the first material conveying channel and at the top of the moving rod, and the push plate is engaged with the retaining sleeve at the bottom of the first material conveying channel.

[0017] By adopting the above technical solution, when the pusher plate moves to the left, it can push the first material conveying channel to move to the left.

[0018] Preferably, two locking blocks are fixed at the top of the first material conveying channel, and the connecting rod is engaged between the two locking blocks.

[0019] By adopting the above technical solution, and using a locking block and connecting rod, the first material conveying channel can be connected to the storage box.

[0020] Preferably, a convex ring is fixed to the outer side of the first rotating rod, and the convex ring is rotatably connected to the inner wall of the first sleeve.

[0021] By adopting the above technical solution, the convex ring plays a limiting role in the first rotating rod.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the blast hole sealing device for bottom cutting in coal mine construction,

[0023] (1) The present invention can achieve the purpose of automatic sealing and firm sealing. The storage box can be used to store the blasting mud. After the first material conveying channel is aligned with the blast hole, the first material conveying channel can be inserted into the blast hole. Then, the blasting mud in the storage box can be transported into the blast hole using the second material conveying channel and the first material conveying channel. At the same time, the first material conveying channel moves slowly to the right so that the blasting mud can fill the blast hole. After the initial sealing operation is completed, the first sealing plate rotates and seals the first guide plate. At the same time, the second sealing plate rotates and seals the first guide plate. After removing the connecting sleeve and letting the second rotating rod leave the slot, the rotating plate can be rotated 180 degrees. Then, the moving rod and the mud-tamping block move to the left and insert into the blast hole to facilitate the tamping of the blasting mud. After that, the mud-filling and mud-tamping operation can be repeated to make the sealing effect more firm and solid.

[0024] (2) The present invention can achieve the purpose of automatic mud injection and tamping. The push plate is initially engaged with the sleeve on the first material conveying channel. The push plate moves to the left, which can push the first material conveying channel, the second material conveying channel and the storage box to the left as a whole. After the rotating plate rotates 180 degrees, the push plate is engaged with the sleeve on the moving rod. The push plate moves to the left, which can push the moving rod to the left. The entire mud injection and tamping operation is completed automatically, which is convenient and fast.

[0025] (3) The present invention can achieve the purpose of easy disassembly and replacement. After loosening the bolt, the mud block can be removed for easy replacement. The size of the mud block can be determined according to the size of the blast hole. Attached Figure Description

[0026] Figure 1 This is a frontal cross-sectional view of the present invention.

[0027] Figure 2 This is a front view of the external structure of the present invention;

[0028] Figure 3 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0029] Figure 4 This is a schematic diagram of the connection structure of the support platform, support plate, first motor, moving rod, tamping block, first electric telescopic rod, push plate and storage box of the present invention.

[0030] Figure 5 This is a schematic diagram of the connection structure of the second material conveying channel, the second rotating rod, the second guide plate, and the second sealing plate of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the first guide plate of the present invention;

[0032] Figure 7 This is a schematic diagram of the second rotating rod structure of the present invention.

[0033] In the diagram: 1. Support platform; 2. Bracket; 3. Support plate; 4. First motor; 5. Rotating plate; 6. First support sleeve; 7. Second support sleeve; 8. First material conveying channel; 9. Moving rod; 10. Sleeve; 11. Tamping block; 12. Bolt; 13. First guide plate; 14. First sleeve; 15. First rotating rod; 16. Protruding ring; 17. First sealing plate; 18. Slot; 19. First electric telescopic rod; 20. Push plate; 21. First opening; 22. Storage box; 3. Top plug; 24. Connecting rod; 25. Locking block; 26. Second material conveying channel; 27. Second opening; 28. Second motor; 29. ​​Spiral rod; 30. Sealing mechanism; 3001. Cover frame; 3002. Third motor; 3003. Second rotating rod; 3004. Moving plate; 3005. Second sleeve; 3006. Second guide plate; 3007. Second sealing plate; 3008. Slide rail; 31. Second electric telescopic rod; 32. Connecting sleeve; 33. Hook rod. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-7 This invention provides a technical solution: a device for sealing mud in blast holes used for bottom cutting in coal mine construction, such as... Figure 1 , Figure 2 and Figure 4 As shown, the device includes a support platform 1 and a support plate 3. A bracket 2 is fixed to the bottom of the support platform 1, and the support plate 3 is fixed between two of the brackets 2. A rotating plate 5 is rotatably connected to one side of the support plate 3. A first motor 4 is fixed inside the support plate 3, and the output end of the first motor 4 is connected to the rotating plate 5. A second support sleeve 7 is fixed to the bottom of the rotating plate 5, and a moving rod 9 passes through the second support sleeve 7. A tamping block 11 is fixed to one end of the moving rod 9 by a bolt 12. The rotating plate 5 can rotate under the action of the first motor 4, which facilitates switching between the first material conveying channel 8 and the moving rod 9. The first material conveying channel 8 can be used to convey blasting clay to seal the blast hole, and the tamping block 11 can be used to tamp the blasting clay. The tamping block 11 and the moving rod 9 are fixed together by bolts 12. The tamping block 11 can be disassembled and replaced, and the size of the tamping block 11 can be determined according to the size of the blast hole.

[0036] like Figure 1 and Figure 2As shown, a first support sleeve 6 is fixed to the top of the rotating plate 5. A first material conveying channel 8 passes through the first support sleeve 6. A retaining sleeve 10 is fixed to the bottom of the first material conveying channel 8 and the top of the moving rod 9. A push plate 20 is engaged with the retaining sleeve 10 at the bottom of the first material conveying channel 8. When the retaining sleeve 10 on the first material conveying channel 8 is engaged with the push plate 20, the push plate 20 moving to the left will drive the first material conveying channel 8 to the left. When the retaining sleeve 10 on the moving rod 9 is engaged with the push plate 20, the push plate 20 moving to the left will drive the moving rod 9 to the left.

[0037] like Figure 1 , Figure 3 and Figure 6 As shown, first guide plates 13 are symmetrically fixed on both sides inside the first material conveying channel 8. A first sleeve 14 is fixed between the two first guide plates 13. A first rotating rod 15 is rotatably connected to the inner side of the first sleeve 14. A convex ring 16 is fixed to the outer side of the first rotating rod 15, and the convex ring 16 is rotatably connected to the inner wall of the first sleeve 14. The convex ring 16 can strengthen the connection between the first rotating rod 15 and the first sleeve 14, making the rotation of the first rotating rod 15 more stable.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, the first rotating rod 15 passes through the first guide plate 13 and the first sleeve 14 and is connected to the first sealing plate 17. The bottom of the support platform 1 is fixed with a first electric telescopic rod 19. One end of the first electric telescopic rod 19 is fixed with a push plate 20. The push plate 20 is engaged with the bottom of the first conveying channel 8. A first opening 21 is opened on one side of the support platform 1. The push plate 20 passes through the first opening 21. The push plate 20 can move left and right under the telescopic action of the first electric telescopic rod 19. The first opening 21 provides space for the push plate 20 to move.

[0039] like Figure 1 and Figure 2 As shown, a storage box 22 is placed on the support platform 1. A top plug 23 is threadedly connected to the top of the storage box 22. A connecting rod 24 is fixed to one side of the storage box 22. The connecting rod 24 is engaged with the top of the first conveying channel 8. Two locking blocks 25 are fixed to the top of the first conveying channel 8. The connecting rod 24 is engaged between the two locking blocks 25. The locking blocks 25 play a locking and limiting role for the connecting rod 24. The connecting rod 24 serves to connect the first conveying channel 8 and the storage box 22. When the push plate 20 pushes the first conveying channel 8 to the left, the storage box 22 moves to the left accordingly.

[0040] like Figure 1 and Figure 3As shown, a second conveying channel 26 is fixed to the bottom of the storage box 22. The second conveying channel 26 passes through one side of the storage box 22. A second opening 27 is provided at the top of the second conveying channel 26. A screw rod 29 is rotatably connected to the inside of the second conveying channel 26. A second motor 28 is fixed inside the second conveying channel 26, and the output end of the second motor 28 is connected to the screw rod 29. The screw rod 29 can rotate under the action of the second motor 28, so as to facilitate the orderly conveying of the gunning clay to the left.

[0041] like Figure 1 , Figure 3 , Figure 5 and Figure 7 As shown, a sealing mechanism 30 is fixed to the inner bottom of the second conveying channel 26. The end of the spiral rod 29 is rotatably connected to the sealing mechanism 30. The sealing mechanism 30 is engaged with one of the first sealing plates 17. One side of the storage box 22 is connected to the connecting sleeve 32 via a second electric telescopic rod 31. The connecting sleeve 32 is placed on the outside of the joint between the first conveying channel 8 and the second conveying channel 26. A hook rod 33 is fixed to one side of the connecting sleeve 32. The sealing mechanism 30 passes through the bottom of the second conveying channel 26 and rests on the hook rod 33, sealing the bottom. The locking mechanism 30 includes a cover frame 3001, which is fixed to the inner bottom of the second material conveying channel 26. The end of the spiral rod 29 is rotatably connected to the cover frame 3001. A third motor 3002 is fixed inside the cover frame 3001, and the output end of the third motor 3002 is connected to a second rotating rod 3003. A moving plate 3004 is rotatably connected to the outer side of the second rotating rod 3003, and a second sleeve 3005 is engaged with the outer side of the second rotating rod 3003. A second guide plate 3006 is fixed to the inner side of the second material conveying channel 26. The second sleeve 3005 penetrates one side of the cover frame 3001 and the second guide plate 3006 and is connected to the second sealing plate 3007. The second sealing plate 3007 is engaged with the outside of the second rotating rod 3003. The second rotating rod 3003 penetrates the second sleeve 3005 and the second sealing plate 3007 and is engaged with the slot 18. The slot 18 is located on one side of one of the first sealing plates 17. The second rotating rod 3003 can rotate under the action of the third motor 3002, thereby driving one of the first sealing plates 17 to rotate. 15 and another first sealing plate 17 rotate together. When the first sealing plate 17 is offset from the first guide plate 13, it can seal the first guide plate 13. When the first sealing plate 17 and the first guide plate 13 overlap, the first guide plate 13 is in the open state. The second sealing plate 3007 can rotate together with the first rotating rod 15. When the second sealing plate 3007 and the second guide plate 3006 are offset from each other, it can seal the second guide plate 3006. When the second sealing plate 3007 and the second guide plate 3006 overlap, the second guide plate 3006 is in the open state.

[0042] Furthermore, a slide rail 3008 is provided at the bottom of the second material conveying channel 26. The movable plate 3004 is slidably connected in the slide rail 3008, and the movable plate 3004 passes through the slide rail 3008 and rests on the hook rod 33. When the connecting sleeve 32 moves to the right and pushes the movable plate 3004 to slide to the right, the first rotating rod 15 moves to the right and leaves the slot 18. When the connecting sleeve 32 moves to the left, the hook rod 33 hooks the movable plate 3004 to slide to the left, so that the first rotating rod 15 can be re-inserted into the slot 18. The slide rail 3008 plays a limiting role in the sliding process of the movable plate 3004.

[0043] Working principle: When using this blasting hole sealing device for coal mine construction, connect to an external power source. First, select the appropriate size mud block 11 according to the size of the blast hole. Then, use bolts 12 to install the mud block 11 onto the moving rod 9. Pour blasting mud into the storage box 22. Initially, the first sealing plate 17 and the first guide plate 13 are aligned, with the first guide plate 13 in the open state. Initially, the second sealing plate 3007 and the second guide plate 3006 are aligned, with the second guide plate 3006 in the open state. After aligning the first conveying channel 8 with the blast hole... Push plate 20 moves to the left, and the first conveying channel 8, storage box 22, and second conveying channel 26 move to the left as a whole. The first conveying channel 8 extends into the blast hole. Then, the auger 29 rotates, thus conveying the blasting mud to the left. The blasting mud is injected into the blast hole through the second conveying channel 26 and the first conveying channel 8. At the same time, push plate 20 moves to the right, and the first conveying channel 8 slowly withdraws from the blast hole, thus filling the blast hole with blasting mud. Then, the second rotating rod 3003 rotates, thereby driving the first rotating rod 15 and the two first sealing plates 17 to rotate as a whole. The first sealing plate 17 and the first guide... The material plates 13 are staggered to seal the first guide plate 13. Simultaneously, the second sleeve 3005 and the second sealing plate 3007 rotate with the rotation of the second rotating rod 3003. The second sealing plate 3007 and the second guide plate 3006 are staggered to seal the second guide plate 3006. Then, the connecting sleeve 32 moves to the right and leaves the first conveying channel 8. When the connecting sleeve 32 pushes the moving plate 3004 to the right, the second rotating rod 3003 moves to the right and leaves the slot 18. Then, the rotating plate 5 rotates 180 degrees, and the sleeve 10 on the moving rod 9 and the push plate... The 20 plates are engaged together, then the push plate 20 moves to the left, thereby pushing the moving rod 9 to the left. The tamping block 11 can tamp the blasting mud. Then the rotating plate 5 rotates, the connecting sleeve 32 moves to the left and reconnects the first conveying channel 8 and the second conveying channel 26. The moving plate 3004 and the second rotating rod 3003 are re-engaged into the slot 18 under the hooking action of the hook rod 33. The above operation is repeated until the blasting mud can completely and tightly seal the blast hole. The contents not described in detail in this specification are the prior art known to those skilled in the art.

[0044] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0045] 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 blast hole sealing device for blasting bottom cutting in coal mine construction, comprising a support platform (1) and a support plate (3), wherein a bracket (2) is fixed at the bottom of the support platform (1), the support plate (3) is fixed between two of the brackets (2), a rotating plate (5) is rotatably connected to one side of the support plate (3), a first motor (4) is fixed inside the support plate (3), and the output end of the first motor (4) is connected to the rotating plate (5), and a second support sleeve (7) is fixed at the bottom of the rotating plate (5). (7) A movable rod (9) is inserted through the inside. One end of the movable rod (9) is fixed with a mud-tamping block (11) by a bolt (12). A first support sleeve (6) is fixed to the top of the rotating plate (5). A first material conveying channel (8) is inserted through the first support sleeve (6). First guide plates (13) are symmetrically fixed on both sides inside the first material conveying channel (8). A first sleeve (14) is fixed between the two first guide plates (13). A first rotating plate is rotatably connected to the inner side of the first sleeve (14). The first rotating rod (15) passes through the first guide plate (13) and the first sleeve (14) and is connected to the first sealing plate (17). The bottom of the support platform (1) is fixed with a first electric telescopic rod (19). One end of the first electric telescopic rod (19) is fixed with a push plate (20). The push plate (20) is engaged with the bottom of the first conveying channel (8). A storage box (22) is placed on the support platform (1). The top of the storage box (22) is threaded with a top plug. (23) A connecting rod (24) is fixed to one side of the storage box (22), and the connecting rod (24) is engaged with the top of the first conveying channel (8). A second conveying channel (26) is fixed to the bottom of the storage box (22). The second conveying channel (26) passes through one side of the storage box (22). A second opening (27) is provided at the top of the second conveying channel (26). A screw rod (29) is rotatably connected to the inner side of the second conveying channel (26). The characteristic is that: A sealing mechanism (30) is fixed to the inner bottom of the second material conveying channel (26). The end of the spiral rod (29) is rotatably connected to the sealing mechanism (30). The sealing mechanism (30) is engaged with one of the first sealing plates (17). One side of the storage box (22) is connected to the connecting sleeve (32) via the second electric telescopic rod (31). The connecting sleeve (32) is placed on the outside of the joint between the first material conveying channel (8) and the second material conveying channel (26). A hook rod (33) is fixed to one side of the connecting sleeve (32). The sealing mechanism (30) passes through the bottom of the second material conveying channel (26) and rests on the hook rod (33). The sealing mechanism (30) includes a cover frame (3001), and the cover frame (3001) is fixed to the inner bottom of the second material conveying channel (26). The end of the spiral rod (29) is rotatably connected to the cover frame (3001). (3001) has a third motor (3002) fixed inside, and the output end of the third motor (3002) is connected to the second rotating rod (3003). The outer side of the second rotating rod (3003) is rotatably connected to a moving plate (3004), and the outer side of the second rotating rod (3003) is engaged with a second sleeve (3005). The inner side of the second material conveying channel (26) has a second guide plate (3006) fixed inside. The second sleeve (3005) passes through one side of the cover frame (3001) and the second guide plate (3006) and is connected to the second sealing plate (3007). The second sealing plate (3007) is engaged with the outer side of the second rotating rod (3003). The second rotating rod (3003) passes through the second sleeve (3005) and the second sealing plate (3007) and is engaged with the slot (18). The slot (18) is opened on one side of one of the first sealing plates (17).

2. A blast hole sealing device for bottom cutting in coal mine construction according to claim 1, characterized in that: The second conveying channel (26) is fixed with a second motor (28), and the output end of the second motor (28) is connected to the screw rod (29).

3. A blast hole sealing device for bottom cutting in coal mine construction according to claim 2, characterized in that: The bottom of the second material conveying channel (26) is provided with a slide (3008), the movable plate (3004) is slidably connected in the slide (3008), and the movable plate (3004) passes through the slide (3008) and rests on the hook rod (33).

4. A blast hole sealing device for bottom cutting in coal mine construction according to claim 1, characterized in that: The support platform (1) has a first opening (21) on one side, and the push plate (20) passes through the first opening (21).

5. A blast hole sealing device for bottom cutting in coal mine construction according to claim 1, characterized in that: The bottom of the first material conveying channel (8) and the top of the moving rod (9) are both fixed with a sleeve (10), and the push plate (20) is engaged in the sleeve (10) at the bottom of the first material conveying channel (8).

6. A blast hole sealing device for bottom cutting in coal mine construction according to claim 1, characterized in that: Two locking blocks (25) are fixed at the top of the first material conveying channel (8), and the connecting rod (24) is engaged between the two locking blocks (25).

7. A blast hole sealing device for bottom cutting in coal mine construction according to claim 1, characterized in that: A convex ring (16) is fixed on the outer side of the first rotating rod (15), and the convex ring (16) is rotatably connected to the inner wall of the first sleeve (14).

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