Top-cutting presplitting blasting energy-gathering pipe structure

Abstract

The utility model relates to the technical field of coal mining, and discloses a top-cutting pre-splitting blasting energy-gathering pipe structure which comprises a pre-splitting blasting energy-gathering pipe, the pre-splitting blasting energy-gathering pipe is of a C-shaped structure, the outer side of a crack on one side of the pre-splitting blasting energy-gathering pipe is sleeved with a powder blocking plate, and a plurality of sets of powder supplementing openings are formed in the powder blocking plate. A gunpowder pressing pad is installed on the side, close to the presplitting blasting energy gathering pipe, of the gunpowder blocking plate, a plurality of sets of guide holes communicated with the gunpowder supplementing opening are formed in the gunpowder pressing pad, and gunpowder guiding pipes penetrate through the positions between the gunpowder supplementing opening and the guide holes. Compared with the prior art, the presplitting blasting energy-gathering pipe has the advantages that the presplitting blasting energy-gathering pipe of the C-shaped structure can be conveniently and evenly filled with gunpowder through the crack, no gap exists in the presplitting blasting energy-gathering pipe, the gunpowder blocking plate is connected to the outer side of the crack of the presplitting blasting energy-gathering pipe in a clamped mode, and the gunpowder at the crack is pressed inwards through the gunpowder pressing pad; and gunpowder can be supplemented into the presplitting blasting energy-gathering pipe subsequently through the multiple sets of gunpowder guiding pipes, so that the tightness of gunpowder filling in the presplitting blasting energy-gathering pipe is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coal seam mining technology, specifically to a top-cutting pre-splitting blasting energy-concentrating tube structure. Background Technology

[0002] The pillarless self-forming roadway 110 method is a novel pillarless mining method that changes the traditional "one face, two roadways" mining model to a "one face, one roadway" model. It cuts off the stress transmission of the working face roof through pre-splitting and blasting, while simultaneously using high-pre-tension, constant-resistance, large-deformation anchor cables to control the roadway roof. After the working face is mined, under mine pressure, the roof strata behind the working face collapse and expand, filling the goaf and achieving automatic roadway formation and pillarless mining. Pillarless self-forming roadway mining technology can effectively reduce periodic pressure, decrease goaf gas, and lower the tendency for coal seam spontaneous combustion. It can also significantly reduce the roadway excavation rate, increase coal resource recovery rate, and reduce coal mining costs. The continuous development and improvement of this technology is driving coal mines towards safer, more efficient, economical, and green mining practices.

[0003] When using pre-splitting blasting in the roof, specific specifications of explosives need to be loaded into a shaped charge tube with a shaped charge effect. During loading, the explosives inside the blast tube need to be compacted. The tighter the explosives are compacted, the more complete the chemical reaction of the explosives, and the greater the explosive power. This ensures that sufficient pressure is accumulated during the explosion to fully exert the explosive's power. Existing blast tubes typically feed explosives from both ends, which easily creates voids inside the blast tube. These voids cannot be inspected; instead, wooden sticks are used to gently press them into the borehole from both ends to compact them, which cannot guarantee the tightness of the internal explosive filling.

[0004] To address the aforementioned technical problems, this application proposes a top-cutting pre-splitting blasting shaped charge tube structure. Utility Model Content

[0005] I. Technical problems to be solved

[0006] The technical problem this invention aims to solve is that the explosive charge in the blasting tube is usually fed in from both ends, which can easily cause gaps inside the blasting tube. Using wooden sticks to gently press into the borehole from both ends to tighten it cannot ensure the tightness of the internal explosive charge filling.

[0007] II. Technical Solution

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a pre-splitting blasting shaped charge tube structure, including a pre-splitting blasting shaped charge tube, wherein the pre-splitting blasting shaped charge tube has a C-shaped structure and a baffle plate is sleeved on the outside of the crack on one side. The baffle plate is provided with multiple sets of gunpowder replenishment ports. A gunpowder pressing pad is installed on the side of the baffle plate near the pre-splitting blasting shaped charge tube. The gunpowder pressing pad is provided with multiple sets of guide holes communicating with the gunpowder replenishment ports. A guide tube passes through the gunpowder replenishment port and the guide hole.

[0009] As an improvement, U-shaped energy-concentrating grooves are provided on both sides of the pre-splitting blasting energy-concentrating tube.

[0010] As an improvement, limiting slots are provided on opposite sides of the opening of the pre-splitting blasting shaped charge tube, and limiting strips are integrally formed on both sides of the baffle plate. The limiting strips are inserted into the corresponding limiting slots to connect the baffle plate and the pre-splitting blasting shaped charge tube.

[0011] As an improvement, the gunpowder pressing pad is made of tough rubber.

[0012] As an improvement, the guide hole has a tapered structure, and the diameter of the end of the guide hole near the gunpowder replenishment port is larger than the diameter of the other end.

[0013] As an improvement, the inner wall of the gunpowder replenishment port is threaded, and a plug is installed inside the gunpowder replenishment port in conjunction with the thread, the plug being inserted into the guide hole.

[0014] III. Beneficial Effects

[0015] The advantages of this invention compared to the prior art are as follows: the C-shaped pre-splitting shaped charge tube is easy to fill with gunpowder evenly through the crack, and there will be no gaps inside. The baffle plate is attached to the outside of the crack of the pre-splitting shaped charge tube, and the gunpowder at the crack is pressed inward by the gunpowder pressing pad. Multiple sets of gunpowder guide tubes can be used to replenish gunpowder into the pre-splitting shaped charge tube in the future to ensure the tightness of the gunpowder filling inside the pre-splitting shaped charge tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a pre-splitting explosive shaped charge tube according to the present invention.

[0017] Figure 2 This is a schematic diagram of the pre-splitting blasting energy-concentrating tube structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the outer structure of the baffle plate of a pre-splitting explosive shaped charge tube according to the present invention.

[0019] Figure 4This is a schematic diagram of the inner structure of the baffle plate of a pre-splitting explosive shaped charge tube according to the present invention.

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the baffle plate of a pre-splitting explosive shaped charge tube according to the present invention.

[0021] Figure 6 This is a schematic diagram of the plug structure of a pre-cracked explosive shaped charge tube according to the present invention.

[0022] As shown in the figure: 1. Pre-splitting blasting shaped charge tube; 2. Baffle plate; 3. Limiting slot; 4. Limiting strip; 5. Explosive pressing pad; 6. Explosive replenishment port; 7. Guide hole; 8. Explosive tube; 9. Plug. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] As attached Figure 1 Appendix Figure 2 and attached Figure 4 As shown, a pre-splitting explosive shaped charge tube structure includes a pre-splitting explosive shaped charge tube 1. The pre-splitting explosive shaped charge tube 1 has U-shaped shaped charge grooves on both sides. The pre-splitting explosive shaped charge tube 1 has a C-shaped structure, and a baffle plate 2 is sleeved on the outer side of the crack on one side. Limiting grooves 3 are provided on opposite sides of the opening of the pre-splitting explosive shaped charge tube 1. Limiting strips 4 are integrally formed on both edges of the baffle plate 2. Both the pre-splitting explosive shaped charge tube 1 and the baffle plate 2 are made of PVC material, possessing a certain deformation and rebound capability under stress. The limiting strips 4 are inserted into the corresponding limiting grooves 3 to connect the baffle plate 2 and the pre-splitting explosive shaped charge tube 1. A gunpowder pressing pad 5 is installed on the side of the baffle plate 2 closest to the pre-splitting explosive shaped charge tube 1.

[0026] With the above structure, when filling the pre-splitting shaped charge tube 1 with gunpowder, the baffle plate 2 is removed, and the gunpowder is evenly delivered into the pre-splitting shaped charge tube 1 from the crack. The gunpowder pressing pad 5 on the inner side of the baffle plate 2 is inserted to the inner side of the crack in the pre-splitting shaped charge tube 1. The cracks in the pre-splitting shaped charge tube 1 are pressed together, and the limiting strip 4 is inserted into the corresponding limiting groove 3. Through the rebound force of the pre-splitting shaped charge tube 1, the baffle plate 2 is stably installed on the outer side of the pre-splitting shaped charge tube 1. The gunpowder on the inner side of the crack is pressed into the pre-splitting shaped charge tube 1 by the gunpowder pressing pad 5, so that the gunpowder inside the pre-splitting shaped charge tube 1 is compressed.

[0027] As attached Figure 3 Appendix Figure 4 and attached Figure 5 As shown, the baffle plate 2 is provided with multiple sets of gunpowder replenishment ports 6, and the gunpowder pressing pad 5 is provided with multiple sets of guide holes 7 connected to the gunpowder replenishment ports 6. A guide tube 8 passes through the gunpowder replenishment ports 6 and the guide holes 7. The guide hole 7 has a conical structure, and the diameter of the guide hole 7 at the end closer to the gunpowder replenishment port 6 is larger than the diameter of the other end. The gunpowder pressing pad 5 is made of tough rubber material, so that the deformation range of the diameter of the guide hole 7 at the end away from the gunpowder replenishment port 6 is 0.5 to 20 mm.

[0028] With the above structure, after the baffle plate 2 is installed, when it is necessary to replenish gunpowder into the pre-splitting shaped charge tube 1, the guide tube 8 can be inserted into the gunpowder replenishment port 6 at the location to be replenished. Push the guide tube 8 so that it passes through the guide hole 7 and enters the pre-splitting shaped charge tube 1. Gunpowder can be continuously replenished into the pre-splitting shaped charge tube 1 through the guide tube 8. After replenishment is completed, the guide tube 8 is pulled out. The rebound force of the gunpowder compression pad 5 made of tough rubber material reduces the diameter of the end of the guide hole 7 away from the gunpowder replenishment port 6, preventing gunpowder from leaking out through the guide hole 7.

[0029] Example 2

[0030] Based on Example 1, please refer to the appendix. Figure 5 and attached Figure 6 The inner wall of the gunpowder replenishment port 6 is threaded, and a plug 9 is installed inside the gunpowder replenishment port 6 in conjunction with the thread. The plug 9 is inserted into the guide hole 7.

[0031] With the above-described structure in Embodiment 2, in order to prevent gunpowder from leaking out of the guide hole 7, after the guide tube 8 is pulled out, the plug 9 is threadedly installed into the gunpowder replenishment port 6, and the guide hole 7 is blocked by inserting the plug 9 into the guide hole 7 to prevent gunpowder from leaking out.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0034] 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 pre-splitting explosive shaped charge tube structure, comprising a pre-splitting explosive shaped charge tube (1), characterized in that: The pre-splitting blasting shaped charge tube (1) has a C-shaped structure and a baffle plate (2) is sleeved on the outside of the crack on one side. The baffle plate (2) is provided with multiple sets of gunpowder replenishment ports (6). A gunpowder pressing pad (5) is installed on the side of the baffle plate (2) close to the pre-splitting blasting shaped charge tube (1). The gunpowder pressing pad (5) is provided with multiple sets of guide holes (7) connected to the gunpowder replenishment ports (6). A guide tube (8) passes through the gunpowder replenishment port (6) and the guide hole (7).

2. The pre-fractured shaped charge tube structure according to claim 1, characterized in that: The pre-splitting blasting energy-concentrating tube (1) is provided with U-shaped energy-concentrating grooves on both sides.

3. The pre-fractured blasting shaped charge tube structure according to claim 1, characterized in that: The pre-splitting blasting energy-concentrating tube (1) has a limiting groove (3) on each of its opposite sides at the opening. The baffle plate (2) has a limiting strip (4) integrally formed on each of its two sides. The limiting strip (4) is inserted into the corresponding limiting groove (3) to connect the baffle plate (2) to the pre-splitting blasting energy-concentrating tube (1).

4. The pre-fractured shaped charge tube structure according to claim 1, characterized in that: The gunpowder pressing pad (5) is made of tough rubber.

5. The pre-fractured shaped charge tube structure according to claim 4, characterized in that: The guide hole (7) has a tapered structure, and the diameter of the end of the guide hole (7) near the gunpowder replenishment port (6) is larger than the diameter of the other end.

6. The pre-fractured shaped charge tube structure according to claim 4, characterized in that: The inner wall of the gunpowder replenishment port (6) is threaded, and a plug (9) is installed inside the gunpowder replenishment port (6) with the thread. The plug (9) is inserted into the guide hole (7).

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