Air space charge structure for open pit blasting

Abstract

The application relates to an air interval charging structure for open-pit mine blasting, and belongs to the technical field of mine blasting engineering, which comprises an upper charging cylinder and a clamping jaw mechanism. The application has the advantages that the upper connecting piece and the lower connecting piece are provided, the surfaces of the upper connecting piece and the lower connecting piece are provided with external threads and internal threads, the upper charging cylinder and the lower charging cylinder are conveniently screwed, the screwing structure can improve the stability between the upper charging cylinder and the lower charging cylinder, the sealing and fastening between the upper charging cylinder and the lower charging cylinder are ensured, the torsional strength is improved, the rubber buffer layer, the porous ceramic sound-absorbing material and the nanoscale bubble generator are arranged, the upper explosive energy can first act on the rubber buffer layer during blasting, the high-elasticity characteristic of the rubber buffer layer can absorb the impact force, the energy concentration in the upper surrounding rock is avoided, over-excavation is avoided, the porous ceramic sound-absorbing material in the middle disperses the residual energy through the honeycomb structure, and the effect of absorbing the blasting high-frequency noise is achieved.

Description

Technical Field

[0001] This application relates to the field of mining blasting engineering technology, and in particular to an air-spaced charge structure for open-pit mine blasting. Background Technology

[0002] Currently, in open-pit mine blasting operations, air-gap charge structures play a crucial role, effectively regulating the energy distribution of explosives and improving blasting results.

[0003] Regarding the aforementioned technologies, traditional air-gap charge structures have many problems in practical applications. During blasting, the stability of existing air-gap devices is poor, and commonly used materials such as plastic bags and bamboo tubes are easily damaged by the impact of the charge, leading to gap failure and affecting the transfer of blasting energy. At the same time, a single air layer causes the explosive energy to be concentrated in a local area, resulting in uneven blast fragments and causing many inconveniences in use. Utility Model Content

[0004] The purpose of this application is to provide an air-spaced charge structure for blasting in open-pit mines, which has the advantages of good stability and good blasting effect of multi-layer air layers, and solves the problems mentioned in the background art.

[0005] The air-gap charging structure for open-pit mine blasting provided in this application adopts the following technical solution: it includes an upper charging cylinder and a gripper mechanism. An upper connecting member is fixedly connected to the surface of the upper charging cylinder, and a lower connecting member is threadedly connected to the surface of the upper connecting member. A lower charging cylinder is fixedly connected inside the lower connecting member. The bottom of the upper charge cartridge is covered with a rubber buffer layer, and the bottom of the rubber buffer layer is provided with a porous ceramic sound-absorbing material, and the bottom of the porous ceramic sound-absorbing material is provided with a nano-level bubble generator.

[0006] By adopting the above technical solution, and by setting up upper and lower connecting parts, both of which have external and internal threads on their surfaces, it is easy to install the upper and lower charging cartridges together. The threaded installation structure can improve the stability between the upper and lower charging cartridges, while ensuring a tight seal between them and improving torsional strength. By setting up a rubber buffer layer, porous ceramic sound-absorbing material, and a nano-level bubble generator, during blasting, the energy of the upper explosive first acts on the rubber buffer layer, whose high elasticity can absorb the impact force and prevent energy from concentrating in the upper surrounding rock, thus avoiding over-excavation. The porous ceramic sound-absorbing material in the middle disperses the remaining energy through its honeycomb structure and absorbs high-frequency blasting noise. The nano-level bubble generator at the bottom can generate a bubble cluster, allowing the shock wave to be evenly transmitted to the lower rock mass through the bubble cluster, achieving the effect of axial layered release of explosive energy.

[0007] Preferably, the gripper mechanism includes several fixed blocks that are fixedly connected to the surfaces of the upper and lower drug cartridges. A spring is fixedly connected to the side of each fixed block, a horizontal plate is fixedly connected to the surface of each spring, and a cylindrical gripper is fixedly connected to the side of the horizontal plate. A rubber pad is provided on the surface of the cylindrical gripper.

[0008] By adopting the above technical solution and setting up a gripper mechanism, when the device enters the hole, the cylindrical gripper is squeezed by the hole wall. The horizontal plate compresses the spring, generating a reverse elastic force to make the gripper fit tightly against the hole wall. The rubber pad increases the friction, preventing the device from sliding before loading or blasting, thus achieving the purpose of adjustable support for the device.

[0009] Preferably, the top of the upper charge cartridge is fixedly connected to an initiator mounting slot, and the bottom of the lower charge cartridge is fixedly connected to a conical guide head.

[0010] By adopting the above technical solution and setting the detonator installation slot, the detonator can be quickly embedded along the slot guide during installation, and the buckle automatically locks, avoiding positional deviation caused by manual installation. This ensures that the blasting shock wave is transmitted symmetrically from the center of the explosive, avoiding uneven energy distribution caused by the detonation point deviation. At the same time, precise positioning ensures the timing synchronization of multi-hole blasting, improving the consistency of the overall blasting effect. By setting the conical guide head, when entering the hole, the conical head first contacts the gravel or rock debris at the bottom of the hole. The conical surface decomposes the radial resistance into axial force, reducing lateral deviation, thereby reducing the jamming rate and improving operation efficiency in fractured rock layers.

[0011] Preferably, a gas guide tube is fixedly connected to the top of the upper drug cartridge, and a silicone ring gasket is provided on the top of the rubber buffer layer. The gas guide tube passes through the silicone ring gasket and is inserted into the interior of the rubber buffer layer.

[0012] By adopting the above technical solution and setting up a gas guide pipe, a stable gas channel can be formed. During blasting, the high-pressure gas generated by the detonation of the explosive can flow directionally along the gas guide pipe, avoiding disorderly diffusion of gas in the charge cartridge. By setting up a silicone ring gasket, the gas guide pipe and the rubber buffer layer can be tightly fitted, effectively reducing gas leakage and allowing more energy to be used to break rocks. This structure achieves the purpose of making energy transfer more concentrated and efficient, improving the utilization rate of explosives and reducing explosive consumption.

[0013] Preferably, a lighting lamp is fixedly installed on the top of the upper medicine cartridge, and a fixing ring is fixedly connected to the top of the upper medicine cartridge.

[0014] By adopting the above technical solution and installing lighting, the area around the charge cartridge can be directly illuminated, clearly showing the connection status and operational details of each component. This reduces safety hazards caused by blind spots and ensures that operators can accurately complete the charging process. The fixing ring can serve as a force-bearing point, making it convenient for operators to move the upper charge cartridge using ropes, hooks, and other tools. Especially in deep-hole blasting, when the charge structure needs to be lowered into the borehole, the fixing ring can stably connect to the hoisting equipment, preventing the charge cartridge from tilting or colliding with the borehole wall during transportation. This ensures that it enters the preset position in the correct posture, reducing structural damage or charge displacement caused by improper handling.

[0015] Preferably, the air duct is provided with a breathable cloth inside.

[0016] By adopting the above technical solution and setting up a breathable cloth, it is possible to prevent the blockage of pipes or the adhesion of impurities such as mineral dust and rock fragments in the open-pit mine environment if they enter the air duct with the airflow, affecting the gas flow efficiency. The breathable cloth has a dense fiber structure that can intercept solid impurities in the airflow, allowing only clean gas to pass through, ensuring that the air duct remains unobstructed for a long time, avoiding gas pressure imbalance or energy transfer obstruction caused by blockage, and ensuring the stable functioning of the gas separation effect during blasting.

[0017] Preferably, the lower connector is provided with an oil-resistant sealing gasket inside.

[0018] By adopting the above technical solution and setting oil-resistant sealing gaskets, it is possible that during blasting operations, the upper and lower charging cartridges may come into contact with lubricating oil and oily additives in the explosives. Ordinary seals are prone to swelling, hardening, or aging due to long-term contact with oil, leading to seal failure. In contrast, oil-resistant sealing gaskets are made of oil-resistant rubber, which can resist the erosion of oily media, maintain stable elasticity and sealing performance, prevent oil from seeping into the interior of the upper and lower connecting parts or leaking from gaps, avoid direct contact between oil and explosives causing a decrease in chemical stability, and ensure the stability of the blasting agent's performance.

[0019] Preferably, the upper charge cartridge is made of modified glass fiber reinforced polypropylene, the lower charge cartridge is made of low alloy high-strength steel, and the conical guide head is made of high chromium cast iron.

[0020] By adopting the above technical solutions and using modified glass fiber reinforced polypropylene, the glass fiber reinforcement significantly enhances the tensile and flexural strength of polypropylene, making it superior to ordinary plastics. Simultaneously, its density is much lower than that of metals. As the material for the upper charging cartridge, it can greatly reduce the overall structural weight, facilitating manual handling or mechanical hoisting. Especially in deep-hole blasting, it can reduce energy consumption and equipment load during the lowering process, while preventing deformation of the upper charging cartridge due to excessive weight. By using low-alloy high-strength steel, with the addition of alloying elements such as manganese and chromium, it can resist collisions and compression during the lowering process, preventing deformation or breakage and ensuring the structural stability of the lower charging area. By using high-chromium cast iron, the high-chromium cast iron, due to the formation of hard chromium carbides, reduces wear during repeated drilling, extending the replacement cycle of the guide head and reducing equipment maintenance costs, as the upper and lower charging cartridges frequently rub against the borehole wall during drilling.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This open-pit mine blasting air-gap charging structure, through the setting of upper and lower connecting parts, with external and internal threads on their surfaces, facilitates threaded installation between the upper and lower charging cylinders. The threaded installation structure improves the stability between the upper and lower charging cylinders, while ensuring a tight seal and increasing torsional strength. By incorporating a rubber buffer layer, porous ceramic sound-absorbing material, and a nano-scale bubble generator, during blasting, the energy of the upper explosive first acts on the rubber buffer layer, whose high elasticity absorbs the impact force, preventing energy concentration in the upper surrounding rock and thus avoiding over-excavation. The porous ceramic sound-absorbing material in the middle disperses the remaining energy through its honeycomb structure, while also absorbing high-frequency blasting noise. The nano-scale bubble generator at the bottom generates a bubble cluster, allowing the shock wave to be evenly transmitted to the lower rock mass through the bubble cluster, achieving the effect of axial, layered release of explosive energy. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall front view structure of this application; Figure 2 for Figure 1 A side-view exploded view of the upper and lower charge cartridges. Figure 3 for Figure 1 A frontal view of the central airway tube; Figure 4 This is a side view of the gripper mechanism in this application. Figure 5 This is a frontal view of the material structure of this application.

[0023] In the picture: 1. Upper charge cartridge; 2. Upper connector; 3. Lower connector; 4. Lower charge cartridge; 5. Gripper mechanism; 501. Fixing block; 502. Spring; 503. Horizontal plate; 504. Cylindrical gripper; 505. Rubber pad; 6. Detonator mounting slot; 7. Conical guide head; 8. Gas duct; 9. Illumination lamp; 10. Fixing ring; 11. Oil-resistant sealing gasket; 12. Rubber buffer layer; 13. Porous ceramic sound-absorbing material; 14. Nanoscale bubble generator; 15. Breathable cloth; 16. Silicone ring gasket; 17. Modified glass fiber reinforced polypropylene; 18. Low alloy high-strength steel; 19. High chromium cast iron. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0025] Example 1: An air-gap charge structure for open-pit mine blasting, referring to... Figure 1 , Figure 2 and Figure 3 It includes an upper charging cartridge 1 and a gripper mechanism 5. An upper connecting piece 2 is fixedly connected to the surface of the upper charging cartridge 1. A lower connecting piece 3 is threadedly connected to the surface of the upper connecting piece 2. A lower charging cartridge 4 is fixedly connected inside the lower connecting piece 3. A rubber buffer layer 12 overlaps at the bottom of the upper charge cartridge 1. A porous ceramic sound-absorbing material 13 is disposed at the bottom of the rubber buffer layer 12, and a nano-level bubble generator 14 is disposed at the bottom of the porous ceramic sound-absorbing material 13. By providing an upper connector 2 and a lower connector 3, both with external and internal threads on their surfaces, threaded installation between the upper charge cartridge 1 and the lower charge cartridge 4 is facilitated. This threaded installation structure improves the stability between the upper charge cartridge 1 and the lower charge cartridge 4, while ensuring a tight and sealed connection between them. To improve torsional strength, by setting up a rubber buffer layer 12, a porous ceramic sound-absorbing material 13, and a nano-level bubble generator 14, the energy of the upper explosive can first act on the rubber buffer layer 12 during blasting. Its high elasticity can absorb the impact force and prevent the energy from concentrating in the upper surrounding rock, which would lead to over-excavation. The porous ceramic sound-absorbing material 13 in the middle disperses the remaining energy through its honeycomb structure and absorbs high-frequency blasting noise at the same time. The nano-level bubble generator 14 at the bottom can generate a bubble cluster, so that the shock wave can be evenly transmitted to the lower rock mass through the bubble cluster, achieving the effect of releasing the explosive energy in layers along the axial direction.

[0026] Please see Figure 1 and Figure 4The gripper mechanism 5 includes several fixed blocks 501, each fixedly connected to the surface of the upper charge cartridge 1 and the lower charge cartridge 4. Springs 502 are fixedly connected to the sides of the fixed blocks 501. A horizontal plate 503 is fixedly connected to the surface of the springs 502. A cylindrical gripper 504 is fixedly connected to the side of the horizontal plate 503. A rubber pad 505 is provided on the surface of the cylindrical gripper 504. By setting up the gripper mechanism 5, when the device enters the hole, the cylindrical gripper 504 is squeezed by the hole wall. The horizontal plate 503 compresses the springs 502, generating a reverse elastic force that makes the gripper tightly fit against the hole wall. The rubber pad 505 increases friction, preventing the device from sliding before charging or detonation, thus achieving adjustable support for the device. A detonator is fixedly connected to the top of the upper charge cartridge 1. The detonator mounting slot 6 has a conical guide head 7 fixedly connected to the bottom of the lower charge cartridge 4. By setting the detonator mounting slot 6, the detonator can be quickly embedded along the guide of the slot during installation, and the buckle will automatically lock, avoiding positional deviation caused by manual installation. This ensures that the blasting shock wave is transmitted symmetrically from the center of the explosive, avoiding uneven energy distribution caused by the deviation of the detonation point. At the same time, precise positioning ensures the timing synchronization of multi-hole blasting and improves the consistency of the overall blasting effect. By setting the conical guide head 7, when entering the hole, the conical head first contacts the gravel or rock debris at the bottom of the hole. The conical surface decomposes the radial resistance into an axial force, reducing lateral deviation and achieving the purpose of reducing the jamming rate and improving the operation efficiency in broken rock layers.

[0027] Please see Figure 1 and Figure 3A gas guide pipe 8 is fixedly connected to the top of the upper charge cartridge 1, and a silicone ring gasket 16 is provided on the top of the rubber buffer layer 12. The gas guide pipe 8 passes through the silicone ring gasket 16 and is inserted into the interior of the rubber buffer layer 12. By setting the gas guide pipe 8, a stable gas channel can be formed. During detonation, the high-pressure gas generated by the explosive detonation can flow directionally along the gas guide pipe 8, avoiding disorderly diffusion of gas in the charge cartridge. By setting the silicone ring gasket 16, the gas guide pipe 8 and the rubber buffer layer 12 can be tightly fitted, effectively reducing gas leakage and allowing more energy to be used for breaking rocks. This structure achieves the purpose of making energy transfer more concentrated and efficient, improving the utilization rate of explosives and reducing explosive consumption. The upper part is fixedly equipped with a lighting lamp 9, and the top of the upper charge cartridge 1 is fixedly connected with a fixing ring 10. By setting the lighting lamp 9, the area around the charge cartridge can be directly illuminated, clearly showing the connection status and operation details of each component, reducing safety hazards caused by blind spots, and ensuring that operators can accurately complete the charging process. By setting the fixing ring 10, it can serve as a force point, making it convenient for operators to move the upper charge cartridge 1 with ropes, hooks and other tools. Especially in deep hole blasting, when the charge structure needs to be lowered into the borehole, the fixing ring 10 can stably connect to the hoisting equipment, preventing the charge cartridge from tilting or colliding with the borehole wall during transportation, ensuring that it enters the preset position in the correct posture, and reducing structural damage or charge displacement caused by improper transportation.

[0028] Please see Figure 2 , Figure 3 and Figure 5The gas duct 8 is internally equipped with a breathable cloth 15. This breathable cloth 15 prevents the accumulation of impurities such as mineral dust and rock fragments in the open-pit mine environment. If these impurities enter the gas duct 8 with the airflow, they may clog the pipe or adhere to the surfaces of components such as the rubber buffer layer 12 and the nano-scale bubble generator 14, affecting gas flow efficiency. The breathable cloth 15 has a dense fiber structure that intercepts solid impurities in the airflow, allowing only clean gas to pass through. This ensures the gas duct 8 remains unobstructed for a long time, preventing gas pressure imbalance or energy transfer obstruction due to blockage, and guaranteeing the stable function of the gas gap during blasting. (Lower section) The connector 3 is internally equipped with an oil-resistant sealing gasket 11. This gasket prevents the upper charging cartridge 1 and lower charging cartridge 4 from coming into contact with lubricating oil and oily additives in the explosives during blasting operations. Ordinary seals, when exposed to oil for extended periods, are prone to swelling, hardening, or aging, leading to seal failure. The oil-resistant sealing gasket 11, made of oil-resistant rubber, resists the erosion of oily media, maintains stable elasticity and sealing performance, and prevents oil from seeping into the upper connector 2 and lower connector 3 or leaking through gaps. This also avoids direct contact between oil and explosives, preventing chemical instability. To ensure the stability of the explosive agent's performance and reduce degradation, the upper charging cartridge 1 is made of modified glass fiber reinforced polypropylene 17, the lower charging cartridge 4 is made of low-alloy high-strength steel 18, and the conical guide head 7 is made of high-chromium cast iron 19. By using modified glass fiber reinforced polypropylene 17, the glass fiber reinforcement significantly enhances the tensile and flexural strength compared to ordinary plastics, while its density is much lower than that of metal. Using this material for the upper charging cartridge 1 greatly reduces the overall structural weight, facilitating manual handling or mechanical hoisting. This is especially beneficial in deep-hole blasting, reducing the risk of damage during the lowering process. To reduce energy consumption and equipment load, and to prevent deformation of the upper charge cartridge 1 due to excessive weight, a low-alloy high-strength steel 18 material is used. This material can incorporate alloying elements such as manganese and chromium, which can withstand collisions and compression during the lowering process, preventing deformation or breakage and ensuring the structural stability of the lower charge area. A high-chromium cast iron 19 material is also used. When the upper charge cartridge 1 and the lower charge cartridge 4 are lowered into the borehole, they need to frequently rub against the inner wall of the borehole. The high-chromium cast iron forms hard chromium carbides, which can reduce wear during repeated entry and exit from the borehole, extend the replacement cycle of the guide head, and reduce equipment maintenance costs.

[0029] The implementation principle of this application embodiment is as follows: First, the charging operation is carried out, and the explosives are loaded into the upper charging tube 1 and the lower charging tube 4 respectively. After the charging is completed, the external detonator is installed in the detonator mounting slot 6 at the top of the upper charging tube 1. The foolproof design of the detonator mounting slot 6 can ensure that the external detonator is accurately positioned and avoid positional deviation from affecting the subsequent blasting effect. Then, the device is assembled. The upper charge cartridge 1 is connected to the lower charge cartridge 4 via the upper connector 2 and the lower connector 3 via the lower connector 3. The oil-resistant sealing gasket 11 inside the lower connector 3 ensures that the connection is sealed and tight. At this time, the upper charge cartridge 1 and the lower charge cartridge 4 form an integral structure, which improves the torsional strength and lays a stable foundation for subsequent operations. At the same time, during the assembly process, ensure that the rubber buffer layer 12, the porous ceramic sound-absorbing material 13 and the nano-level bubble generator 14 at the bottom of the upper charge cartridge 1 are placed in sequence. Then, the device is placed into the borehole. Using the fixing ring 10 at the top of the upper charge 1, the entire device is lifted by ropes or hooks. During the lifting process, the lighting lamp 9 at the top of the upper charge 1 can be turned on according to the ambient light conditions to illuminate the area around the upper charge 1 and the lower charge 4, so that the operator can observe the status of the device and the surrounding environment. Afterwards, the device is lowered into the borehole. During the lowering process, the conical guide head 7 first contacts the gravel or rock debris at the bottom of the borehole. Its conical surface decomposes the radial resistance into an axial force, reducing the lateral offset of the device and allowing it to be lowered smoothly. At the same time, the cylindrical gripper 504 in the gripper mechanism 5 is squeezed by the borehole wall. The horizontal plate 503 compresses the spring 502. The reverse elastic force generated by the spring 502 makes the cylindrical gripper 504 fit tightly against the borehole wall. The rubber pad 505 on the surface of the cylindrical gripper 504 increases the friction, preventing the device from sliding during the descent and ensuring the stable posture of the device in the borehole. Subsequently, after the device reaches the preset position, a pre-blasting inspection is carried out to ensure that all components are firmly connected, the external detonator is working properly, and the breathable cloth 15 inside the gas duct 8 can intercept solid impurities in the airflow, ensuring that the gas duct 8 is unobstructed and preparing for the stable flow of gas during blasting. Finally, the external detonator is activated for blasting. The high-pressure gas generated by the blast flows directionally along the gas guide pipe 8. The silicone ring gasket 16 is tightly attached to the gas guide pipe 8 and the rubber buffer layer 12 to reduce gas leakage. The energy of the upper explosive first acts on the rubber buffer layer 12, whose high elasticity absorbs part of the impact force, preventing energy from concentrating in the upper surrounding rock and causing over-excavation. The porous ceramic sound-absorbing material 13 in the middle disperses the remaining energy through the honeycomb structure, while absorbing the high-frequency noise of the blast. The nanoscale bubble generator 14 at the bottom generates a bubble cluster, so that the shock wave is evenly transmitted to the lower rock mass through the bubble cluster, realizing the axial layered release of explosive energy, and achieving the ideal blasting effect.

[0030] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An air-gap charging structure for blasting in open-pit mines, comprising an upper charging cylinder (1) and a gripper mechanism (5), characterized in that: The upper medicine cartridge (1) is fixedly connected to an upper connector (2), the upper connector (2) is threadedly connected to a lower connector (3), and the lower connector (3) is fixedly connected to a lower medicine cartridge (4) inside. The bottom of the upper charge cartridge (1) is covered with a rubber buffer layer (12), and the bottom of the rubber buffer layer (12) is provided with a porous ceramic sound-absorbing material (13), and the bottom of the porous ceramic sound-absorbing material (13) is provided with a nano-level bubble generator (14).

2. The air-gap charging structure for open-pit mine blasting according to claim 1, characterized in that: The gripper mechanism (5) includes several fixed blocks (501) that are fixedly connected to the surfaces of the upper drug cartridge (1) and the lower drug cartridge (4). A spring (502) is fixedly connected to the side of the fixed block (501). A horizontal plate (503) is fixedly connected to the surface of the spring (502). A cylindrical gripper (504) is fixedly connected to the side of the horizontal plate (503). A rubber pad (505) is provided on the surface of the cylindrical gripper (504).

3. The air-gap charge structure for open-pit mine blasting according to claim 1, characterized in that: The top of the upper charge cartridge (1) is fixedly connected to an initiator mounting slot (6), and the bottom of the lower charge cartridge (4) is fixedly connected to a conical guide head (7).

4. The air-gap charge structure for open-pit mine blasting according to claim 1, characterized in that: The top of the upper drug-filling cylinder (1) is fixedly connected to a gas guide tube (8), and a silicone ring pad (16) is provided on the top of the rubber buffer layer (12). The gas guide tube (8) passes through the silicone ring pad (16) and is inserted into the interior of the rubber buffer layer (12).

5. The air-gap charging structure for open-pit mine blasting according to claim 1, characterized in that: A lighting lamp (9) is fixedly installed on the top of the upper medicine loading tube (1), and a fixing ring (10) is fixedly connected to the top of the upper medicine loading tube (1).

6. The air-gap charge structure for open-pit mine blasting according to claim 4, characterized in that: The air duct (8) is provided with a breathable cloth (15).

7. The air-gap charge structure for open-pit mine blasting according to claim 1, characterized in that: The lower connector (3) is provided with an oil-resistant sealing gasket (11).

8. The air-gap charge structure for open-pit mine blasting according to claim 3, characterized in that: The upper charge cartridge (1) is made of modified glass fiber reinforced polypropylene (17), the lower charge cartridge (4) is made of low alloy high strength steel (18), and the conical guide head (7) is made of high chromium cast iron (19).

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