A large cross section mountain tunnel light smooth blasting device of water pressure energy concentration

Abstract

This application relates to the field of tunnel engineering blasting technology, and provides a shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels. It includes reinforced explosive, a first shaped charge tube, a second shaped charge tube, a third shaped charge tube, half-rolls of explosive, an electronic detonator, a detonating cord, a water bag, and a sandbag. The first, second, and third shaped charge tubes are arranged coaxially in sequence, with half-rolls of explosive at both ends of each tube. The detonating cord connects the half-rolls of explosive at both ends of the shaped charge tube. The reinforced explosive is located at the end of the first shaped charge tube furthest from the second shaped charge tube, and the electronic detonator is located at the reinforced explosive. The water bag is located at the end of the third shaped charge tube furthest from the second shaped charge tube, and the sandbag is located close to the water bag. The sandbag is used to block the blast hole, and the lead wire of the electronic detonator passes through the blast hole. This application improves the blasting effect of shaped charge blasting.

Description

Technical Field

[0001] This application relates to the field of tunnel engineering blasting technology, and in particular to a shaped charge water pressure smooth blasting device for ultra-large cross-section mountain tunnels. Background Technology

[0002] During tunnel construction, sections with lower hardness can be directly excavated using tunnel boring machines (TBMs). However, for sections with higher hardness, such as granite, this method would cause significant damage to the equipment, resulting in a very short drill bit lifespan and low excavation efficiency. To improve construction efficiency, blasting is required for excavating these geological sections. This involves creating several blasting holes in the rock face and inserting explosives into them.

[0003] Tunnel blasting technology is a core component of tunnel excavation, directly impacting construction efficiency, safety, and cost. Existing technologies primarily include conventional smooth blasting, shaped charge blasting, and hydraulic blasting. Conventional smooth blasting employs a dense perimeter borehole layout, using either continuous or air-gap charging. The blasting effect is controlled by the borehole spacing and charge quantity, achieving a smooth blast surface. Its advantage is its mature technology; its disadvantages include a large number of boreholes and lengthy drilling time.

[0004] Targeted blasting uses a shaped charge tube device to load explosives and releases energy directionally through a shaped charge trough. Its advantages are concentrated energy and good blasting effect; its disadvantages are complex loading process and poor adaptability to geological conditions.

[0005] Hydraulic blasting involves adding a water bag to the blast hole, utilizing the incompressibility of water to enhance the blasting effect. Its advantage is good dust suppression, but its disadvantage is that it's difficult to control the blast direction when used alone.

[0006] Regarding the technologies mentioned above, shaped charge blasting technology, due to its concentrated energy release characteristics, has begun to be applied in tunnel engineering. However, how to further optimize the blasting effect by combining it with hydraulic blasting remains a technical challenge. Furthermore, shaped charge blasting has limited improvement on the uniformity of rock fragmentation, dust suppression, and ventilation efficiency, making it difficult to meet the requirements of high-standard tunnel construction, and therefore requires further improvement. Utility Model Content

[0007] In order to combine hydraulic blasting with shaped charge blasting to improve blasting effect and dust suppression effect, this application provides a shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels.

[0008] The technical solution of the shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels provided in this application is as follows:

[0009] A shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels includes reinforced explosives, a first shaped charge tube, a second shaped charge tube, a third shaped charge tube, half-rolls of explosives, an electronic detonator, a detonating cord, a water bag, and a sandbag. The first, second, and third shaped charge tubes are arranged coaxially in sequence. Half-rolls of explosives are provided at both ends of the first, second, and third shaped charge tubes. The detonating cord is used to connect the half-rolls of explosives at both ends of the shaped charge tubes.

[0010] The enhanced explosive is located at the end of the first shaped charge tube away from the second shaped charge tube, and the electronic detonator is located at the enhanced explosive; the water bag is located at the end of the third shaped charge tube away from the second shaped charge tube, the water sand bag is close to the water bag, the water sand bag is used to block the borehole, and the lead wire of the electronic detonator passes through the borehole.

[0011] By adopting the above technical solution, three shaped charge tubes are continuously arranged, namely the first shaped charge tube, the second shaped charge tube, and the third shaped charge tube. The charge in the shaped charge tube is spaced charge, that is, longitudinally uncoupled charge.

[0012] The specific assembly steps are as follows: First, cut a section of rock emulsion explosive in half to form two semi-rolls of explosive. Then, align the cut ends of the explosives with the two ends of the shaped charge tube and slip them onto the shaped charge tube, thus completely inserting the two semi-rolls of explosive into the shaped charge tube. Next, connect the two semi-rolls of explosive at both ends of the shaped charge tube with detonating cord, and fix the detonating cord in the shaped charge tube with a small plastic block. Finally, wrap a plastic strip around the middle of the shaped charge tube as a limiting ring to keep the shaped charge tube in the center of the borehole.

[0013] The charging process is as follows: After the blast holes are dug, firstly, an electronic detonator is inserted into the reinforced explosive and placed at the bottom of the blast hole. Then, the first, second, and third shaped charge tubes are continuously loaded next to the reinforced explosive at the bottom of the hole. Next, a water bag is filled and pushed to the explosive position of the third shaped charge tube with a ramrod, ensuring a tight connection without gaps. Finally, the blast hole opening is sealed with a sandbag. It is important to note that when loading the shaped charge tube device, the shaped charge groove must be parallel to the tunnel outline, and the opening side of the shaped charge tube must face the light-blasting layer of rock.

[0014] The blasting operation employed a horizontal wedge-shaped double-cutting method, with three rows arranged on each side. Cutting hole 1 formed an angle of 62° with the working face, cutting hole 2 formed an angle of 70°, and cutting hole 3 formed an angle of 79°. All peripheral holes, bottom plate holes, and auxiliary holes were drilled using straight-hole drilling, with the auxiliary holes at the arch roughly arranged in a semi-circular arc. All cutting holes, bottom plate holes, and auxiliary holes used continuous charging.

[0015] The lead wire is the critical line connecting the detonator and the explosive (or detonating charge). Its main function is to transmit the detonation signal (such as current, shock wave, etc.) to ensure that the detonation system accurately detonates the explosive as designed. When the current is conducted through the lead wire to the electronic detonator, it can trigger the detonator to explode, thereby detonating the surrounding explosives.

[0016] After the entire blasting device explodes, the energy-concentrating slots of the first, second, and third shaped charge tubes release the explosive energy in a directional manner, concentrating the energy on the rock mass within the blast zone. The water bags are compressed at the moment of explosion, creating a water wedge effect that enhances rock fragmentation and reduces dust. Water-filled sandbags are used to plug the blast hole openings, compacting and securing them to prevent energy leakage and improve blasting efficiency.

[0017] Preferably, the first, second, and third energy-concentrating tubes are C-shaped energy-concentrating tubes, which are made of plastic material and are 1m long, with the C-shaped opening of the energy-concentrating tube facing the light-blasted rock mass.

[0018] By adopting the above technical solution, the core function of the C-type shaped charge tube is to create a focusing effect through the "C-shaped opening," concentrating the explosive energy in the direction of the opening and enhancing the directional breaking capability against the target medium (such as rock and concrete). Compared with W-type and D-type shaped charge tubes, the C-type shaped charge tube is easier and faster to assemble. It no longer requires equipment such as air compressors and injection guns, and can be prepared on-site, which helps to reduce preparation time and operational difficulty.

[0019] Plastic materials (such as polyethylene and polypropylene) have a much lower density than metals, significantly reducing the weight of C-type shaped charge tubes. In blasting sites (especially in confined spaces such as mines and tunnels, or where manual handling is required), this reduces handling effort, improves installation efficiency, and simultaneously lowers energy consumption and costs during transportation.

[0020] Preferably, the water bag is made of polyethylene and has a capacity of 500mL.

[0021] By employing the above technical solution, the water bag is placed in close contact with the explosive. After the explosive is detonated, the water bag generates a water wedge effect, enhancing rock breaking and reducing dust, thus combining hydraulic blasting with shaped charge blasting. The capacity of the water bag can be adjusted according to the diameter of the blast hole to ensure effective dust suppression.

[0022] Preferably, the sandbag is a woven bag filled with fine sand.

[0023] By adopting the above technical solution, fine sand is filled into the woven bag. The fine sand has a small particle size, which can reduce the gap between the sandbag and the blast hole, ensuring sealing and blasting effect.

[0024] Preferably, the first, second, and third shaped charge tubes are all wrapped with rubber rings at their middle positions, and the rubber rings are used to restrict the shaped charge tubes to be located at the center of the borehole.

[0025] By adopting the above technical solution, the diameter of the borehole is generally larger than the diameter of the C-type shaped charge tube during the drilling process. To ensure that the shaped charge tube is centered in the borehole, several rubber rings are wrapped around the middle of the shaped charge tube, increasing the diameter of the tube at the middle position. Once the shaped charge tube is inserted into the borehole, its position is less likely to change, ensuring the correct orientation of the C-shaped opening.

[0026] Preferably, a slot is provided on one end face of the energy-concentrating tube, and a block is connected to the other end face, wherein the block on the second energy-concentrating tube is engaged in the slot of the first energy-concentrating tube.

[0027] By adopting the above technical solution, the connection between the first and second shaped charge tubes, as well as the connection between the second and third shaped charge tubes, is achieved by relying on static friction through the cooperation of the card block and the card slot, ensuring that the explosives of the two adjacent shaped charge tubes are in close contact with each other, thereby improving the explosion effect.

[0028] Preferably, it also includes a hinge post and a connecting strip. The hinge post is rotatably connected to the first energy-concentrating tube. One end of the connecting strip is provided on the hinge post, and the other end is provided with a plug post. The plug post is inserted into a preset slot in the second energy-concentrating tube.

[0029] By adopting the above technical solution, the existence of the hinge post enables the connecting strip to rotate. After the ends of the first energy-concentrating tube and the second energy-concentrating tube are joined together, the staff can insert the pin on the connecting strip into the slot of the second energy-concentrating tube, and further improve the connection stability between the two energy-concentrating tubes by relying on the insertion force.

[0030] Preferably, the enhanced explosive is a rock emulsion explosive with a cartridge diameter of 32 mm.

[0031] By adopting the above technical solution, the detonation velocity, saturation and other parameters of rock emulsion explosives are optimized, which can generate powerful shock waves and explosive gases, meet the crushing requirements of rocks of different hardness, and produce uniform fragments with a reduced rate of large pieces.

[0032] Preferably, a dust suppressant is added to the water bag.

[0033] By adopting the above technical solution and adding dust suppressant to the water bag, the core function is to significantly reduce the dust concentration generated by blasting by enhancing the water's ability to capture, agglomerate, and settle dust, thereby improving the working environment, ensuring construction safety, and reducing pollution to the surrounding environment.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] (1) By setting up enhanced explosives, several shaped charge tubes, water bags, and sandbags, the shaped charge slots of each shaped charge tube release explosive energy in a directional manner, so that the energy is concentrated on the rock mass of the light-blasting layer. The water bags are compressed at the moment of explosion, generating a water wedge effect, which enhances the rock breaking effect and reduces dust. The sandbags block the blast hole openings to prevent energy leakage and improve blasting efficiency. The combination of shaped charge tubes and water bags reduces the number of blast holes and drilling time, improves construction efficiency and the smoothness of the contour surface; reduces blasting vibration and reduces the impact on the surrounding rock mass and buildings; and at the same time improves dust suppression and ventilation efficiency.

[0036] (2) By setting a rubber ring on the shaped charge tube, the rubber ring can increase the outer diameter of the middle part of the shaped charge tube, ensuring that the shaped charge tube is in the center of the borehole.

[0037] (3) By setting the card blocks and card slots at both ends of the energy-concentrating tube, the connection stability of two adjacent energy-concentrating tubes can be improved. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the blasting device installed in the borehole in the embodiment of this application;

[0039] Figure 2 This is a schematic diagram of the structure of the first energy-concentrating tube in the embodiments of this application;

[0040] Figure 3 This is a schematic diagram of the structure of the first energy-concentrating tube and the second energy-concentrating tube in another embodiment of this application;

[0041] Figure 4 This is a schematic diagram of the structure of the first energy-concentrating tube and the second energy-concentrating tube in another embodiment of this application.

[0042] Reference numerals: 1. Reinforced explosive; 2. First shaped charge tube; 3. Second shaped charge tube; 4. Third shaped charge tube; 5. Half roll of explosive; 6. Electronic detonator; 7. Detonating cord; 8. Water bag; 9. Sandbag; 10. Slot; 11. Locking block; 12. Hinge post; 13. Connecting strip; 14. Lead wire; 15. Rubber ring. Detailed Implementation

[0043] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.

[0044] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0047] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.

[0048] This application discloses a shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels. (Refer to...) Figure 1 and Figure 2 The blasting device includes reinforced explosive 1, a first shaped charge tube 2, a second shaped charge tube 3, a third shaped charge tube 4, a half-roll of explosive 5, an electronic detonator 6, a detonating cord 7, a water bag 8, and a sandbag 9. The first shaped charge tube 2, the second shaped charge tube 3, and the third shaped charge tube 4 are arranged coaxially in sequence. In this embodiment, all three shaped charge tubes are C-shaped, meaning their end faces are C-shaped. The C-shaped shaped charge tubes are made of plastic and are 1m long, with the C-shaped opening facing the light-blasting layer rock mass. Half-rolls of explosive 5 are installed at both ends of the first shaped charge tube 2, the second shaped charge tube 3, and the third shaped charge tube 4. The half-rolls of explosive 5 at both ends of the shaped charge tube are connected by a detonating cord 7. The explosive is a rock emulsion explosive. After the half-rolls of explosive 5 are loaded into the shaped charge tube, a rubber ring 15 is wrapped around the middle of the shaped charge tube, increasing the diameter of the shaped charge tube at a local location.

[0049] When assembling the half-roll explosive 5, first, cut a section of rock emulsion explosive in half to form two half-roll explosives 5. Then, align the cut ends of the explosives with the two ends of the shaped charge tube and slip them onto the shaped charge tube, thus completely inserting the two half-roll explosives 5 into the shaped charge tube. Next, connect the two half-roll explosives 5 at both ends of the shaped charge tube with detonating cord 7, and fix the detonating cord 7 in the shaped charge tube with a small plastic block. Finally, wrap a plastic strip around the middle of the shaped charge tube as a rubber ring 15. The outer diameter of the rubber ring 15 is slightly smaller than the inner diameter of the borehole, so that the shaped charge tube is controlled in the center position of the borehole.

[0050] Specifically, the enhanced explosive 1 is a rock emulsion explosive with a cartridge diameter of 32mm. The rock emulsion explosive generates a powerful shock wave and explosive gases, meeting the requirements for crushing rocks of varying hardness, and producing uniformly sized fragments, reducing the proportion of large pieces. The enhanced explosive 1 is installed at the end of the first shaped charge tube 2 furthest from the second shaped charge tube 3, and the electronic detonator 6 is installed at the enhanced explosive 1. The water bag 8 is installed at the end of the third shaped charge tube 4 furthest from the second shaped charge tube 3. The water bag 8 is made of polyethylene and has a capacity of 500mL. The capacity of the water bag 8 can be adjusted according to the needs of the construction project to ensure dust suppression. In this embodiment, a dust suppressant is added inside the water bag 8, and the dust suppressant is mixed with water. The dust suppressant enhances the water's ability to capture, agglomerate, and settle dust, significantly reducing the dust concentration generated by blasting, thereby improving the working environment, ensuring construction safety, and reducing pollution to the surrounding environment. A sandbag 9 is placed close to a water bag 8, with an air gap between them. The sandbag 9 is used to plug the blast hole, and the lead wire 14 of the electronic detonator 6 passes through the blast hole. Lead wire 14 is the critical line connecting the detonating device and the explosive (or detonating charge), and its main function is to transmit the detonation signal (such as current, shock wave, etc.) to ensure that the detonation system accurately detonates the explosive as designed. When the current is conducted to the electric detonator through lead wire 14, it can trigger the detonator to explode, thereby detonating the surrounding explosives. The sandbag 9 is made of woven bag and filled with fine sand. The small particle size of the fine sand can reduce the gap between the sandbag 9 and the blast hole, ensuring sealing and blasting effect.

[0051] Reference Figure 3 In some embodiments, a slot 10 is formed on one end face of the shaped charge tube, and a locking block 11 is fixedly connected to the other end face. Adjacent shaped charge tubes are engaged through the locking block 11 and the slot 10. That is, the locking block 11 at the end of the second shaped charge tube 3 is engaged in the slot 10 of the first shaped charge tube 2, and the locking block 11 at the end of the third shaped charge tube 4 is engaged in the slot 10 of the second shaped charge tube 3. Under the action of static friction, the connection between the first shaped charge tube 2 and the second shaped charge tube 3, as well as the connection between the second shaped charge tube 3 and the third shaped charge tube 4, is realized, ensuring that the explosives in the adjacent shaped charge tubes are tightly attached to each other, thereby improving the explosion effect.

[0052] Reference Figure 4Furthermore, to improve the connection stability between adjacent energy-concentrating tubes, a connecting strip 13 is rotatably connected to the first energy-concentrating tube 2. A hinge post 12 is rotatably connected to the outer wall of the first energy-concentrating tube 2, located at the end of the first energy-concentrating tube 2 closest to the second energy-concentrating tube 3. One end of the connecting strip 13 is fixedly connected to the hinge post 12, and the other end is fixedly connected to an insertion post. The connecting strip 13 is flexible and made of plastic. A slot is pre-set on the end of the second energy-concentrating tube 3 closest to the first energy-concentrating tube 2, and the insertion post is inserted into the slot. After the ends of the first energy-concentrating tube 2 and the second energy-concentrating tube 3 are engaged, the operator can rotate the connecting strip 13 so that the insertion post on the connecting strip 13 is inserted into the slot of the second energy-concentrating tube 3, further improving the connection stability between the two energy-concentrating tubes by relying on the insertion force.

[0053] The implementation principle of a shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels according to an embodiment of this application is as follows: During construction, the construction personnel first excavate the blast holes. After the blast holes are excavated, an electronic detonator 6 is first inserted into the reinforcing explosive 1 and filled at the bottom of the blast hole. Then, the first shaped charge tube 2, the second shaped charge tube 3, and the third shaped charge tube 4 are continuously filled next to the reinforcing explosive 1 at the bottom of the hole. Next, a water bag 8 is filled and pushed to the explosive position of the third shaped charge tube 4 with a blasting rod, ensuring that they are tightly connected without gaps. Finally, a sandbag 9 is used to block the blast hole opening. It should be noted that when filling the C-shaped shaped charge tube device, the C-shaped shaped charge groove must be parallel to the tunnel outline, and the opening side of the shaped charge tube should face the smooth blasting layer rock mass.

[0054] The blasting operation employed a horizontal wedge-shaped double-cutting method, with three rows arranged on each side. Cutting hole 1 formed an angle of 62° with the working face, cutting hole 2 formed an angle of 70°, and cutting hole 3 formed an angle of 79°. All peripheral holes, bottom plate holes, and auxiliary holes were drilled using straight-hole drilling, with the auxiliary holes at the arch roughly arranged in a semi-circular arc. All cutting holes, bottom plate holes, and auxiliary holes used continuous charging.

[0055] During blasting, current is conducted through lead wire 14 to electronic detonator 6, triggering the detonator to explode and igniting surrounding explosives. After the entire blasting device explodes, the energy-concentrating slots of the first shaped charge tube 2, the second shaped charge tube 3, and the third shaped charge tube 4 release explosive energy in a directional manner, concentrating the energy on the rock mass of the light-blast layer. Water bag 8 is compressed at the moment of explosion, creating a water wedge effect, enhancing rock fragmentation and reducing dust. Water-sand bag 9 blocks the blast hole, compacting and fixing it to prevent energy leakage and improve blasting efficiency.

[0056] Targeted hydraulic pressure smooth blasting offers superior blasting results, saving approximately 15% to 20% of explosives. It also results in more uniform rock fragmentation, producing fewer large rock fragments and reducing secondary dust generation during transport. Furthermore, dust suppression can be further enhanced by combining blasting with spray dust control equipment. Through these comprehensive measures, the dust reduction rate is expected to exceed 60%, and the post-blast tunnel ventilation and smoke extraction efficiency will improve by 20% to 40%. Simultaneously, it reduces the number of blast holes required for smooth blasting in the surrounding areas by 40% and shortens drilling time by approximately 20% to 30%. It also improves the quality of cross-section excavation, achieving a blast hole utilization rate of over 95% and a half-hole mark retention rate of over 85% for smooth blasting.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for smooth blasting of super large section mountain tunnel by water pressure, characterized in that, The device includes a reinforced explosive (1), a first shaped charge tube (2), a second shaped charge tube (3), a third shaped charge tube (4), a half-roll explosive (5), an electronic detonator (6), a detonating cord (7), a water bag (8), and a sandbag (9). The first shaped charge tube (2), the second shaped charge tube (3), and the third shaped charge tube (4) are arranged coaxially in sequence. The half-roll explosive (5) is provided at both ends of the first shaped charge tube (2), the second shaped charge tube (3), and the third shaped charge tube (4). The detonating cord (7) is used to connect the half-roll explosive (5) at both ends of the shaped charge tube. The enhanced explosive (1) is located at the end of the first shaped charge tube (2) away from the second shaped charge tube (3), and the electronic detonator (6) is located at the enhanced explosive (1); the water bag (8) is located at the end of the third shaped charge tube (4) away from the second shaped charge tube (3), the water sand bag (9) is close to the water bag (8), the water sand bag (9) is used to block the blast hole, and the lead wire (14) of the electronic detonator (6) passes through the blast hole.

2. The device according to claim 1, characterized in that, The first energy-concentrating tube (2), the second energy-concentrating tube (3) and the third energy-concentrating tube (4) are C-shaped energy-concentrating tubes. The C-shaped energy-concentrating tubes are made of plastic material and are 1m long. The C-shaped opening of the energy-concentrating tube faces the light-blasting layer rock mass.

3. The device according to claim 1, characterized in that, The water bag (8) is made of polyethylene and has a capacity of 500mL.

4. The device according to claim 1, characterized in that, The water-sand bag (9) is a woven bag filled with fine sand.

5. The device according to claim 1, characterized in that, The first energy-concentrating tube (2), the second energy-concentrating tube (3) and the third energy-concentrating tube (4) are all wrapped with rubber rings (15) at their middle positions. The rubber rings (15) are used to restrict the energy-concentrating tubes to be in the center position of the borehole.

6. The device according to claim 1, characterized in that, A slot (10) is provided on one end face of the energy-concentrating tube, and a block (11) is connected to the other end face. The block (11) on the second energy-concentrating tube (3) is engaged in the slot (10) of the first energy-concentrating tube (2).

7. The device according to claim 6, characterized in that, It also includes a hinge post (12) and a connecting strip (13). The hinge post (12) is rotatably connected to the first energy-concentrating tube (2). One end of the connecting strip (13) is provided on the hinge post (12), and the other end is provided with a plug. The plug is inserted into a pre-set slot in the second energy-concentrating tube (3).

8. The device according to claim 1, characterized in that, The enhanced explosive (1) is a rock emulsion explosive with a cartridge diameter of 32 mm.

9. The device according to claim 1, characterized in that, The water bag (8) contains a dust suppressant.

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