Charging and hole sealing device for coal mine roof deep hole presplitting blasting

Abstract

The charging and hole sealing device comprises a charging barrel, the upper end of the charging barrel is open, a push rod is movably connected to the lower end of the charging barrel in an inserted mode, the interior of the push rod is hollow, a square hole sleeve is fixedly arranged at the end, stretching into the charging barrel, of the push rod, and the lower end of the push rod is connected with a rotating connector. The rotary joint is connected with an external grouting mechanism through a hose; a square plug is matched with the square hole sleeve, the cartridge bag and the lifting fixing assembly can be easily fed into a blast hole by pushing a push rod, after the cartridge bag and the lifting fixing assembly reach a preset position, the push rod is rotated to drive a lead screw to rotate, and the lead screw jacks an arc-shaped elastic connecting plate; and the elastic clamping plates deform outwards to abut against the inner wall of the blast hole to complete firm clamping. The fixing mode adapts to blast holes with different hole diameters, the cartridge bags are effectively prevented from sliding off, a stable foundation is provided for follow-up hole sealing and blasting operation, and the safety and reliability of the whole operation process are enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of deep hole blasting devices, specifically a charging and sealing device for deep hole pre-splitting blasting of coal mine roof. Background Technology

[0002] As coal mining intensity and underground mining areas continue to increase, if the hard roof above the coal seam cannot collapse in time with the advancement of the working face, the exposed roof strata or the hard roof on the side facing the goaf will deform and accumulate energy under the action of its own weight stress and mining-induced stress. This energy participates in the coal seam failure and instability process, increasing the risk of coal seam impact and inducing dynamic disasters such as rockbursts and mine tremors. If the conditions for roof energy accumulation can be changed in time or its ability to continuously transfer energy can be disrupted, the risk of roof dynamic pressure disasters can be reduced.

[0003] Currently, deep-hole roof pre-splitting blasting is often used to artificially intervene in roof fracture at high levels in mining areas. However, the high blasting layers of the roof strata present significant challenges in loading and sealing the blast holes, necessitating an auxiliary device for loading and sealing the explosive charges. Utility Model Content

[0004] (I) Technical Issues

[0005] This utility model provides a charging and sealing device for deep-hole pre-splitting blasting of coal mine roof, solving the problem of difficult charging and sealing of blasting holes in high-level roof rock strata.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a charging and sealing device for deep hole pre-splitting blasting of coal mine roof, comprising a charging cylinder, an open upper end of which is movably connected to a push rod at the lower end, the push rod being hollow inside and having a square hole sleeve fixedly attached to one end extending into the charging cylinder, and a rotary joint connected to the lower end of the push rod, the rotary joint being connected to an external grouting mechanism via a flexible hose; it also includes a lifting and fixing component for engaging with the deep hole to prevent the explosive charge from slipping, the lifting and fixing component being movably disposed inside the charging cylinder, comprising a circular support plate, elastic clamping plates fixedly attached to the left and right sides of the upper surface of the circular support plate, an arc-shaped elastic connecting plate fixedly connected between the two elastic clamping plates, a screw threadedly connected to the center of the circular support plate, the upper end of the screw being rotatably connected to the bottom surface of the elastic connecting plate, and a square plug adapted to the square hole sleeve fixedly attached to the lower end of the screw.

[0008] Furthermore, the square plug has a cavity inside, and multiple grouting holes are provided on the upper side of the cavity. The rotary joint, the hollow push rod, the square hole sleeve, the cavity, and the grouting holes are connected to form a sealing grouting channel.

[0009] Furthermore, a sealing gasket is fixedly provided on the bottom surface inside the square hole sleeve.

[0010] Furthermore, a handle is fixedly provided at the lower part of the push rod.

[0011] Furthermore, a circular limiting plate is fixedly provided at one end of the push rod that extends into the inside of the medicine cylinder, and the side of the circular limiting plate is slidably connected to the inner wall of the medicine cylinder.

[0012] (III) Technical Effects

[0013] The advantages of this utility model compared with the prior art are:

[0014] 1. Highly efficient and stable loading: The lifting and fixing component is placed into the charging cartridge first, followed by the explosive charge. The square plug mates with the square-hole sleeve, and pushing the push rod easily delivers the explosive charge and lifting and fixing component into the blast hole. The process is simple and smooth, and the circular limit plate on the push rod ensures stability during pushing, preventing deviation and shaking, significantly improving loading efficiency and accuracy, and ensuring the explosive charge is accurately delivered to the designated position.

[0015] 2. Secure and Reliable Fixation: After reaching the predetermined position, rotating the push rod drives the lead screw to rotate, which in turn lifts the arc-shaped elastic connecting plate, causing the elastic clamping plate to deform outward and tighten against the inner wall of the blast hole, completing a secure connection. This fixing method is suitable for blast holes of different diameters, effectively preventing the explosive charge from slipping, providing a stable foundation for subsequent hole sealing and blasting operations, and enhancing the safety and reliability of the entire operation process.

[0016] 3. Simple and High-Quality Sealing: The support and fixing component, as a disposable part, not only prevents the mortar pack from slipping but also effectively supports the sealing mortar. After connecting to the external grouting mechanism, the sealing mortar is evenly injected into the top of the circular support plate along the grouting channel, achieving efficient sealing, ensuring sealing quality, and the operation process is simple, allowing workers to quickly complete the sealing operation and improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of this utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model. Figure 2 .

[0019] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the lifting and fixing component of this utility model. Figure 1 .

[0021] Figure 5 This is a three-dimensional structural diagram of the lifting and fixing component of this utility model. Figure 2 .

[0022] Figure 6 This is a three-dimensional structural diagram of the push rod of this utility model. Figure 1 .

[0023] Figure 7 This is a three-dimensional structural diagram of the push rod of this utility model. Figure 2 .

[0024] As shown in the figure: 1. Drug cartridge; 2. Push rod; 3. Square hole sleeve; 4. Rotary joint; 5. Circular support plate; 6. Lead screw; 7. Elastic clamping plate; 8. Elastic connecting plate; 9. Square plug; 10. Cavity; 11. Grouting hole; 12. Handle; 13. Circular limit plate. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Combined with appendix Figure 1 To be continued Figure 7A charging and sealing device for deep-hole pre-splitting blasting of coal mine roof includes a charging cylinder 1. The charging cylinder 1 is open at the upper end and movably connected to a push rod 2 at the lower end. The push rod 2 is hollow inside, and a square hole sleeve 3 is fixedly installed at one end extending into the charging cylinder 1. A sealing gasket is fixedly installed on the bottom surface of the square hole sleeve 3. A rotary joint 4 is connected to the lower end of the push rod 2. The rotary joint 4 is connected to an external grouting mechanism through a hose. The device also includes a lifting and fixing assembly for engaging with the deep hole to prevent the explosive charge from slipping. The lifting and fixing assembly is movably installed inside the charging cylinder 1 and includes a circular support plate 5. Elastic clamping plates 7 are fixedly installed on both the left and right sides of the upper surface of the circular support plate 5. An arc-shaped elastic connecting plate 8 is fixedly connected between the two elastic clamping plates 7. A screw rod 6 is threadedly connected to the center of the circular support plate 5. The upper end of the screw rod 6 is rotatably connected to the bottom surface of the elastic connecting plate 8. A square plug 9 adapted to the square hole sleeve 3 is fixedly installed at the lower end of the screw rod 6.

[0029] In this embodiment, as a preferred technical solution, the square plug 9 has a cavity 10 inside, and the upper side of the cavity 10 has a plurality of grouting holes 11. The rotary joint 4, the hollow push rod 2, the square hole sleeve 3, the cavity 10 and the grouting holes 11 are connected to form a sealing grouting channel.

[0030] In this embodiment, as a preferred technical solution, the lower part of the push rod 2 is fixedly provided with a handle 12, and one end of the push rod 2 that extends into the inside of the medicine cylinder 1 is fixedly provided with a circular limiting plate 13, and the side of the circular limiting plate 13 is slidably connected to the inner wall of the medicine cylinder 1.

[0031] The working principle of this utility model of a charging and sealing device for deep-hole pre-splitting blasting of coal mine roof is as follows: Charging and sealing are achieved through the coordinated operation of the charging cylinder 1, the push rod 2, and the lifting and fixing assembly. The push rod 2 pushes the lifting and fixing assembly, carrying the explosive charge into the blast hole. The screw rod 6, elastic clamping plate 7, and arc-shaped elastic connecting plate 8 work together to secure the lifting and fixing assembly to the inner wall of the blast hole, preventing the explosive charge from slipping. Simultaneously, a rotary joint 4 connects to an external grouting mechanism. Through the grouting channel formed by the hollow push rod 2, the square-hole sleeve 3, the square plug 9's internal cavity 10, and the grouting hole 11, sealing mortar is injected, completing the sealing operation.

[0032] The working process of the charging and sealing device for deep-hole pre-splitting blasting of coal mine roof according to this utility model is as follows:

[0033] 1. Preparation: Place the lifting and fixing component into the medicine cartridge 1, and insert the square plug 9 into the square hole sleeve 3 inside the push rod 2. The bottom surface of the square hole sleeve 3 is equipped with a sealing gasket to ensure airtightness.

[0034] 2. Place the medicine packet: Place the medicine packet into the medicine container 1.

[0035] 3. Loading operation: Hold the handle 12 of the push rod 2 and push the push rod 2. Since the push rod 2 is inserted into the charging cylinder 1 and a circular limiting plate 13 is fixed at one end, it can be pushed stably, which will drive the lifting and fixing components and the explosive pack into the blast hole.

[0036] 4. Fixing the lifting assembly: After reaching the predetermined position inside the blast hole, rotate the push rod 2. Because the lead screw 6 is connected to the center thread of the circular support plate 5, rotating the push rod 2 can drive the lead screw 6 to rotate. While rotating the push rod 2, push the push rod upward to prevent the square plug 9 and the square hole sleeve 3 from disengaging. The lead screw 6 lifts the arc-shaped elastic connecting plate 8, causing the elastic clamping plate 7 to deform outward and press against the inner wall of the blast hole, thus completing the clamping and fixing of the lifting and fixing assembly with the blast hole.

[0037] 5. Sealing operation: The sealing mortar is connected to the external grouting mechanism through the rotary joint 4. The sealing mortar enters the hollow push rod 2 through the hose and rotary joint 4, and then flows out through the cavity 10 inside the square hole sleeve 3 and square plug 9 in sequence, and is injected into the top of the circular support plate 5 to achieve sealing.

[0038] 6. Equipment recovery: After sealing the hole, remove the charge cartridge 1 and leave the supporting and fixing component inside the blast hole as a disposable component. At this point, the entire charge sealing operation is completed.

[0039] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A charging and sealing device for deep-hole pre-splitting blasting of coal mine roof, comprising a charging cylinder (1), wherein the upper end of the charging cylinder (1) is open and the lower end is movably connected to a push rod (2), characterized in that: The push rod (2) is hollow inside and has a square hole sleeve (3) fixed at one end that extends into the charging cylinder (1). The lower end of the push rod (2) is connected to a rotary joint (4), which is connected to an external grouting mechanism through a hose. It also includes a lifting and fixing assembly for engaging with the deep hole to prevent the medicine pack from slipping. The lifting and fixing assembly is movably disposed inside the medicine filling tube (1) and includes a circular support plate (5). Elastic plates (7) are fixedly provided on both the left and right sides of the upper end face of the circular support plate (5). An arc-shaped elastic connecting plate (8) is fixedly connected between the two elastic plates (7). A screw rod (6) is threadedly connected to the center of the circular support plate (5). The upper end of the screw rod (6) is rotatably connected to the bottom surface of the elastic connecting plate (8). A square plug (9) that is compatible with the square hole sleeve (3) is fixedly provided at the lower end of the screw rod (6).

2. The charging and sealing device for deep-hole pre-splitting blasting of coal mine roof as described in claim 1, characterized in that: The square plug (9) has a cavity (10) inside, and multiple grouting holes (11) are provided on the upper side of the cavity (10). The rotary joint (4), the hollow push rod (2), the square hole sleeve (3), the cavity (10) and the grouting holes (11) are connected to form a sealing grouting channel.

3. The charging and sealing device for deep-hole pre-splitting blasting of coal mine roof as described in claim 1, characterized in that: A sealing gasket is fixedly provided on the bottom surface of the square hole sleeve (3).

4. The charging and sealing device for deep-hole pre-splitting blasting of coal mine roof as described in claim 1, characterized in that: The push rod (2) is fixedly provided with a handle (12) at the lower part.

5. The charging and sealing device for deep-hole pre-splitting blasting of coal mine roof as described in claim 1, characterized in that: The push rod (2) is fixed with a circular limiting plate (13) at one end that extends into the medicine cylinder (1), and the side of the circular limiting plate (13) is slidably connected to the inner wall of the medicine cylinder (1).

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