Liquid oxygen explosive device and blasting construction structure

Abstract

The utility model discloses a liquid oxygen explosive device and a blasting construction structure, relates to the technical field of engineering blasting, and solves the problems of high dangerousness and unstable performance of liquid oxygen explosives during manufacturing and use in the prior art. The device comprises a filling pipe, a solid combustible material, an electronic igniter inserted into the filling pipe, a drainage pipe and an exhaust pipe, a closed containing cavity is formed in the filling pipe, a flexible layer is arranged on the outer side of the filling pipe in the circumferential direction, the containing cavity of the filling pipe is filled with the solid combustible materials, the ignition end of the electronic igniter is arranged in the containing cavity of the filling pipe and makes contact with the solid combustible materials to ignite the solid combustible materials, and a liquid absorption layer is wound around the outer side of the ignition end of the electronic igniter. The lower end of the drainage pipe extends to the lower portion of the containing cavity of the filling pipe and is used for filling the containing cavity of the filling pipe with liquid oxygen, and the air inlet end of the exhaust pipe extends to the upper portion in the containing cavity of the filling pipe. The utility model further comprises a blasting construction structure used by the method. Compared with the prior art, the utility model has the advantages of high safety and stable performance.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering blasting, in particular to a liquid oxygen explosive device and a blasting construction structure. Background Art

[0002] At present, in mining technology, the commonly used method for blasting and mining mines is explosive blasting, but explosive blasting is very dangerous and polluting, so some mining blasting technologies now use gas blasting technology.

[0003] Gas blasting technology uses the gasification and expansion of easily vaporized liquid or solid materials to generate high-pressure gas, causing the surrounding medium to expand and do work, resulting in fragmentation. It has the characteristics of no open flame, safety and high efficiency.

[0004] The existing structure for making liquid oxygen explosives is to put liquid oxygen, solid combustibles (such as carbon black and sawdust, etc.) and detonators for detonation into a closed pressure-resistant container. The process and operation method are to make solid combustibles (such as carbon black and sawdust, etc.) that can absorb liquid oxygen into a cylindrical shape and immerse it in liquid oxygen. For example, the Chinese invention patent with patent number CN103193558A, the patent name of which is a method for making liquid oxygen explosives, transfers the prepared liquid oxygen explosives to the required place when they are needed, and detonates them with detonators. Although the explosives of this structure have great blasting power, they have the following disadvantages due to their structural design:

[0005] 1. High degree of danger: If you are not careful during operation, such as introducing static electricity, it may cause an explosion; during transportation, liquid oxygen is a cryogenic liquid and it is easy to leak, causing frostbite and personal injury; the storage and use of detonators for detonation are dangerous and troublesome, and the safety risk factor is very high;

[0006] 2. Unstable performance: When liquid oxygen is exposed to the air, it evaporates very quickly at room temperature, becomes ineffective quickly, and has extremely unstable performance.

[0007] Therefore, a liquid oxygen explosive device and a blasting construction structure are proposed to solve the current deficiencies. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide a liquid oxygen explosive device and a blasting construction structure.

[0009] In order to solve the above technical problems, the technical solution provided by the utility model is a liquid oxygen explosive device and a blasting construction structure: comprising a filling tube, solid combustibles, an electronic igniter inserted in the filling tube, a drainage tube and an exhaust pipe;

[0010] A closed cavity is provided in the filling tube, and a flexible layer is provided circumferentially on the outer side of the filling tube. The solid combustible material is filled in the cavity of the filling tube. The ignition end of the electronic igniter is arranged in the cavity of the filling tube and contacts with the solid combustible material for igniting the solid combustible material. A liquid absorption layer is wrapped around the outer side of the ignition end of the electronic igniter. The lower end of the drainage tube extends to the lower part of the filling tube cavity for filling liquid oxygen into the filling tube cavity, and the air inlet end of the exhaust pipe extends to the upper part of the filling tube cavity.

[0011] When the above-mentioned structure is adopted, the ignition end of the electronic igniter, the liquid outlet end of the drainage tube and the solid combustible are encapsulated in the cavity thereof by means of the filling tube. The use of the electronic igniter to replace the detonator avoids the trouble and danger during the storage and use of the detonator, and can greatly reduce the cost. The drainage tube is used as the filling channel for liquid oxygen, and liquid oxygen can be added to the filling tube only when it is used, avoiding the situation that leakage during transportation harms the human body. At the same time, when filling liquid oxygen, it can be added to the closed cavity of the filling tube through the pipeline, which can avoid liquid oxygen being exposed to the air, making the liquid oxygen explosive device safer during the production and use process, and having stable performance. In addition, the exhaust pipe inserted in the filling tube can discharge the oxygen that absorbs heat and vaporizes, so that more liquid oxygen can be filled into the filling tube to ensure the detonation effect.

[0012] As an improvement, the filling tube is made of any one of a plastic hose and a PVC tube.

[0013] When the above-mentioned structure is adopted, the filling pipe is set as a plastic hose or a PVC pipe, so that the material of the liquid oxygen explosive device is easy to obtain and the cost is low.

[0014] As an improvement, the solid combustible is any one of toilet paper, rice husk, sawdust, cotton, and sponge.

[0015] A blasting construction structure, comprising a mountain and the above-mentioned liquid oxygen explosive device;

[0016] The mountain is provided with a plurality of blasting holes in the blasting area, the filling pipe is arranged in the blasting hole, the flexible layer on the outside of the filling pipe is in contact with the inner wall of the blasting hole, a partition is arranged above the filling pipe in the blasting hole, a backfill material for sealing the hole opening is arranged on the upper side of the partition in the blasting hole, and the other end of the electronic igniter, the drainage pipe and the exhaust pipe passes through the exhaust pipe and the backfill material and extends to the outside of the blasting hole;

[0017] It also includes a liquid oxygen container and a detonator. The liquid inlet end of the drainage tube is connected to the liquid oxygen container, and the connecting end of the electronic igniter is connected to the detonator.

[0018] As an improvement, the liquid inlet end of the drainage pipe extends to 30 to 120 cm outside the blasting hole.

[0019] As an improvement, the backfill material is the mountain waste generated by opening the blasting hole.

[0020] As an improvement, the connection ends of all the electronic igniters are connected in series with each other and connected to the detonator.

[0021] The advantages of the utility model compared with the prior art are:

[0022] 1. Use a filling tube to encapsulate the ignition end of the electronic igniter, the liquid outlet end of the drainage tube and the solid combustible in its cavity. Using an electronic igniter to replace the use of detonators avoids the trouble and danger of storing and using detonators, and can greatly reduce costs. Using a drainage tube as a filling channel for liquid oxygen, liquid oxygen can be added to the filling tube when it is used, avoiding leakage and harm to the human body during transportation. At the same time, when filling liquid oxygen, it can be added to the closed cavity of the filling tube through a pipeline, which can avoid liquid oxygen being exposed to the air, making this type of liquid oxygen explosive device safer during production and use, and has stable performance. In addition, the exhaust pipe inserted in the filling tube can discharge the heat-absorbing and vaporized oxygen, so that more liquid oxygen can be filled into the filling tube to ensure the detonation effect.

[0023] 2. By coordinating the partition and the backfill material, the liquid oxygen explosive device is sealed in the blasting hole, and the liquid oxygen or other easily vaporized liquid in the filling tube is further increased, which can avoid the leakage of liquid oxygen and ensure the blasting effect; at the same time, the flexible layer on the outside of the filling tube has a certain anti-extrusion ability, which reduces the extrusion force of the outer periphery of the filling tube on the blasting hole, and the flexible layer is in contact with the inner wall of the blasting hole, which can ensure the stability of the filling tube in the blasting hole when conveying liquid oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a structural schematic diagram of a liquid oxygen explosive device.

[0025] Figure 2 The utility model is a structural schematic diagram of a blasting construction structure.

[0026] As shown in the figure: 1. Filling tube, 2. Solid combustible material, 3. Electronic igniter, 4. Drainage tube, 5. Exhaust pipe, 6. Flexible layer, 7. Liquid absorption layer, 8. Mountain, 9. Blasting hole, 10. Partition, 11. Backfill material, 12. Liquid oxygen container, 13. Detonator. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model embodiments clearer, the technical solution in the utility model embodiments will be clearly and completely described below in conjunction with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the utility model embodiments, not all of the embodiments. Generally, the components of the utility model embodiments described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] In the description of the utility model embodiments, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the utility model, "plurality" means at least 2.

[0031] In the description of the utility model embodiments, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0032] Combined with Figure 1 As shown, a liquid oxygen explosive device has the advantages of high safety and stable performance. In specific implementation, the liquid oxygen explosive device adopts a non-hazardous electronic igniter and can load liquid oxygen as needed.

[0033] The liquid oxygen explosive device comprises a filling tube 1, a solid combustible material 2, an electronic igniter 3 inserted into the filling tube 1, a drainage tube 4 and an exhaust pipe 5;

[0034] The filling tube 1 is provided with a closed cavity. Specifically, the filling tube 1 is made of any one of a plastic hose and a PVC tube. During implementation, both ends of the filling tube 1 are sealed with plugs or fillers so that there is a closed cavity inside. The cavity is used to fill solid combustibles 6, and to insert an electronic igniter 3, a drainage tube 4 and an exhaust pipe 5.

[0035] A flexible layer 6 is provided on the outer circumference of the filling tube 1. In a specific implementation, the flexible layer 6 abuts against the inner wall of the blasting hole. The flexible layer 6 has a certain anti-extrusion ability, which reduces the extrusion force of the blasting hole on the outer circumference of the filling tube 1. In addition, the flexible layer 6 abuts against the inner wall of the blasting hole, which can ensure the stability of the filling tube 1 in the blasting hole when transporting liquid oxygen.

[0036] The solid combustible material 2 is filled in the cavity of the filling tube 1. The fixed combustible material 2 can be selected according to the actual situation. Specifically, the solid combustible material 2 can be any one of white sugar, rice bran, and crushed plant straw. In this embodiment, the solid combustible material 2 is toilet paper. The toilet paper can absorb a large amount of oxygen molecules by utilizing its strong water absorption, and can also greatly increase the contact area with oxygen by utilizing its porous characteristics. In this way, the toilet paper can burn quickly after being ignited by the electronic ignition head, and the gas temperature in the filling tube 1 will suddenly increase, causing a more violent explosion due to the sudden expansion of the volume, thereby obtaining a better blasting effect. At the same time, since ordinary toilet paper is cheap and easy to obtain, the difficulty and cost of setting up the liquid oxygen explosive device can be greatly reduced.

[0037] In a specific implementation, the solid combustible material 2 is filled in the cavity of the filling tube 1. The filling amount of the solid combustible material 2 is smaller than the cavity of the filling tube 1, so that there is space in the cavity for setting liquid oxygen, the drainage tube 4 and the exhaust pipe 5. However, in a specific setting, the height of the solid combustible material 2 filled in the cavity of the filling tube 1 is higher than the position of the ignition end of the electronic igniter 3 in the cavity of the filling tube 1.

[0038] The ignition end of the electronic igniter 3 is arranged in the cavity of the filling tube 1 and contacts the solid combustible 2 for igniting the solid combustible 2. In specific implementation, the electronic igniter 3 adopts existing equipment, and its function is to ignite the solid combustible 2. In specific settings, the ignition end of the electronic igniter 3 is arranged in the middle section of the cavity of the filling tube 1, and the connection end of the electronic igniter 3 is arranged outside the filling tube 1. The electronic igniter 3 passes through the filling tube 1 for a sealed connection to ensure the sealing of the filling tube 1.

[0039] A liquid absorbing layer 7 is wound around the outside of the ignition end of the electronic igniter 3 . The liquid absorbing layer 7 ensures that the ignition end of the electronic igniter 3 is in contact with liquid oxygen.

[0040] The lower end of the drainage tube 4 extends to the lower part of the cavity of the filling tube 1 for filling the cavity of the filling tube 1 with liquid oxygen;

[0041] Specifically, the drainage tube 4 is a thin tube, which mainly provides a filling channel for liquid oxygen for the filling tube 1. When filling liquid oxygen, liquid oxygen can be filled into the cavity of the filling tube 1 through the drainage tube 4. The liquid outlet end of the drainage tube 4 is arranged at the upper part of the cavity of the filling tube 1, and is located at the side of the cavity of the filling tube 1 away from the electronic igniter 3. The liquid inlet end of the drainage tube 4 is arranged outside the filling tube 1. The drainage tube 4 passes through the filling tube 1 for a sealed connection to ensure the sealing of the filling tube 1.

[0042] Similarly, in actual implementation, liquid nitrogen, or a liquid mixture of liquid nitrogen and liquid oxygen in a certain proportion, or liquid hydrogen, or a liquid mixture of liquid hydrogen and liquid oxygen in a certain proportion may be filled into the cavity of the filling tube 1 through the drainage tube 4. In addition, other liquid gases may be selected for use according to actual conditions, and liquid oxygen may be used as a combustion aid at the same time.

[0043] Specifically, the tank can be directly filled with liquid oxygen, or a mixture of 70% liquid oxygen and about 30% liquid nitrogen, or liquid oxygen and liquid hydrogen.

[0044] It is worth noting that during the filling process of liquid oxygen and other liquid gas combinations, static eliminators must be installed to prevent explosions caused by static electricity.

[0045] The filling tube 1 is used to encapsulate the ignition end of the electronic igniter 3, the drainage tube 4, the exhaust pipe 5 and the solid combustible material 2 in its cavity. The electronic igniter 3 is used to replace the detonator, which avoids the trouble and danger of the detonator in the storage process and the use process, and can greatly reduce the cost. The drainage tube 4 is used as the filling tube 1 to provide a filling channel for liquid oxygen. Liquid oxygen can be added to the filling tube 1 during use, avoiding leakage and harm to the human body during transportation. At the same time, when filling liquid oxygen, it can be added to the closed cavity of the filling tube 1 through a pipeline to avoid liquid oxygen exposure to the air, so that the liquid oxygen explosive device is safer during production and use, and has stable performance.

[0046] The air inlet end of the exhaust pipe 5 extends to the upper part of the cavity of the filling tube 1 . Specifically, the exhaust pipe 5 is located between the electronic igniter 3 and the drainage pipe 4 .

[0047] An exhaust pipe 5 is also inserted in the filling tube 1. The air inlet end of the exhaust pipe 5 is located in the cavity of the filling tube 1, and the exhaust end of the exhaust pipe 5 is located outside the filling tube 1. The exhaust pipe 5 passes through the filling tube 1 for a sealed connection to ensure the sealing of the filling tube 1.

[0048] The air inlet end of the exhaust pipe 5 extends to the upper part of the cavity of the filling tube 1 to discharge more oxygen that absorbs heat and vaporizes, so that more liquid oxygen can be infused into the filling tube 1 to ensure the detonation effect.

[0049] Combined with Figure 2 As shown, a blasting construction structure includes a mountain 8 to be blasted and the above-mentioned liquid oxygen explosive device;

[0050] In the specific implementation, the mountain body 8 has a blasting area, and the mountain body 8 is provided with a plurality of blasting holes 9 in the blasting area. Specifically, the blasting holes 9 are drilled in advance in the blasting area of ​​the mountain body 8 by means of a drilling device, and the inner diameter of the blasting hole 9 is matched with the outer diameter of the flexible layer 6. When the blasting hole 9 is drilled, the axis of the blasting hole 9 is vertical or inclined upward.

[0051] Furthermore, the liquid oxygen explosive device is installed in a plurality of the blasting holes 9. To facilitate the detonation operation, the connection ends of all the electronic igniters 3 are connected in series with each other and connected to the detonator 13 for centralized control.

[0052] The filling tube 1 is arranged in the blasting hole 9, and the flexible layer 6 on the outside of the filling tube 1 abuts against the inner wall of the blasting hole 9. When the filling tube 1 is installed, the bottom of the filling tube 1 abuts against the bottom of the blasting hole 9, and at the same time, the flexible layer 6 on the outside of the filling tube 1 abuts against the inner wall of the blasting hole 9 to ensure the stability of the filling tube 1 in the blasting hole 9. At the same time, the flexible layer 6 has a certain anti-extrusion ability, which reduces the extrusion force of the outer periphery of the filling tube 1 on the blasting hole 9, and the flexible layer 6 abuts against the inner wall of the blasting hole 9, which can ensure the stability of the filling tube 1 in the blasting hole when transporting liquid oxygen.

[0053] A partition 10 is provided above the filling pipe 1 in the blasting hole 9, and a backfill material 11 for blocking the hole opening is provided on the upper side of the partition 10 in the blasting hole 9.

[0054] By setting the partition 10, the gravity of the backfill material 11 can be borne by the partition 10, so as to prevent the filling tube 1 from being deformed by the gravity of the backfill material 11 from the top. At the same time, by the matching setting of the partition 10 and the backfill material 11, the liquid oxygen explosive device is sealed in the blasting hole, and the liquid oxygen or other easily vaporized liquid in the filling tube 1 is further increased, so as to avoid the leakage of liquid oxygen and ensure the blasting effect.

[0055] In specific implementation, the backfill material 11 is the mountain waste generated by opening the blasting hole 9. The waste generated during the construction process is used to block the hole of the blasting hole 9, making it very convenient to obtain the backfill material 11 during the construction process, with less pollution and damage to the environment and reducing costs.

[0056] The other end of the electronic igniter 3, the drainage pipe 4 and the exhaust pipe 5 passes through the exhaust pipe 5 and the backfill material 11 and extends to the outside of the blasting hole 9;

[0057] Specifically, the liquid inlet end of the drainage tube 4 extends to 30 to 120 cm outside the blasting hole 9 to facilitate the perfusion operation of liquid oxygen.

[0058] It also includes a liquid oxygen container 12 and an initiator 13 . The liquid inlet end of the drainage tube 4 is connected to the liquid oxygen container 12 , and the connecting end of the electronic igniter 3 is connected to the initiator 13 .

[0059] Preferably, when liquid oxygen is injected, the liquid inlet end of the drainage tube 4 can be connected to a liquid oxygen container 12 storing liquid oxygen through a pipe joint. Since oxygen is injected through the drainage tube 4 outside the blasting hole 9, it is safer, more stable and reliable.

[0060] Preferably, the connection ends of all electronic igniters 3 are connected in series with each other and connected to the detonator 13 for centralized control.

[0061] During the specific implementation of the utility model, the liquid oxygen explosive device is completely sealed in the blasting hole 9, and liquid oxygen can be poured into the volume of the filling tube 1 through the drainage tube 4 before detonation, so as to avoid the situation that liquid oxygen leakage and harm to human body during transportation and construction can be avoided.

[0062] During the specific blasting construction, a plurality of blasting holes 9 can be drilled in the area to be blasted of the mountain 8. The liquid oxygen explosive device is assembled in the assembly area. During the assembly, ordinary toilet paper is first loaded into the cavity of the filling tube 1 sealed at one end, and then the electronic igniter 3, the drainage tube 4 and the exhaust pipe 5 are loaded, and then the other end of the filling tube 1 is sealed.

[0063] With the end through which the electronic igniter 3, the drainage tube 4 and the exhaust pipe 5 pass as the top end of the filling tube 1, the filling tube 1 is installed into the blasting hole 9 with the bottom end facing the bottom of the hole and the top end facing the hole opening; then a partition 10 is arranged above the blasting hole 9 located above the filling tube 1, and the stone and soil obtained from opening the blasting hole 9 are used as backfill material 11 to block the hole opening of the blasting hole 9, while the connecting end of the electronic igniter 3, the liquid inlet end of the drainage tube 4 and the exhaust end of the exhaust pipe 5 are left outside the hole opening of the blasting hole 9.

[0064] Then connect the liquid inlet end of the drainage tube 4 to the liquid oxygen container 12, and pour liquid oxygen into the cavity of the filling tube 1 through the drainage tube 4. The initially poured liquid oxygen absorbs heat and vaporizes before being discharged from the exhaust pipe 5. After the pouring is completed, remove the liquid oxygen container 12, and seal the exhaust pipe 5. Finally, connect the connecting end of the electronic igniter 3 to the detonator 13, and prepare for detonation.

[0065] During detonation, the detonator 13 is started, and the toilet paper in the filling tube 1 is ignited by the electronic igniter 3. The toilet paper burns rapidly, and the temperature in the filling tube 1 suddenly rises, the liquid oxygen is vaporized, and the volume expands rapidly, causing a violent explosion, achieving the effect of blasting the rocks between the mountain 8.

[0066] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A liquid oxygen explosive device, Features: It comprises a filling tube (1), a solid combustible material (2), an electronic igniter (3) inserted into the filling tube (1), a drainage tube (4) and an exhaust pipe (5); The filling tube (1) is provided with a sealed cavity, and a flexible layer (6) is provided on the outer side of the filling tube (1). The solid combustible (2) is filled in the cavity of the filling tube (1). The ignition end of the electronic igniter (3) is arranged in the cavity of the filling tube (1) and is in contact with the solid combustible (2) for igniting the solid combustible (2). A liquid absorption layer (7) is wound around the outer side of the ignition end of the electronic igniter (3). The lower end of the drainage tube (4) extends to the lower part of the cavity of the filling tube (1) for filling liquid oxygen into the cavity of the filling tube (1). The air inlet end of the exhaust pipe (5) extends to the upper part of the cavity of the filling tube (1).

2. A liquid oxygen explosive device according to claim 1, Features: The filling tube (1) is made of any one of a plastic hose and a PVC tube.

3. A liquid oxygen explosive device according to claim 1, Features: The solid combustible (2) is any one of toilet paper, rice husk, sawdust, cotton and sponge.

4. A blasting construction structure, Features: It comprises a mountain (8) and a liquid oxygen explosive device as described in any one of claims 1 to 3; The mountain (8) is provided with a plurality of blasting holes (9) in the blasting area, the filling tube (1) is arranged in the blasting hole (9), the flexible layer (6) on the outside of the filling tube (1) is in contact with the inner wall of the blasting hole (9), a partition (10) is arranged above the filling tube (1) in the blasting hole (9), a backfill material (11) for sealing the hole opening is arranged on the upper side of the partition (10) in the blasting hole (9), and the other end of the electronic igniter (3), the drainage tube (4) and the exhaust pipe (5) passes through the exhaust pipe (5) and the backfill material (11) and extends to the outside of the blasting hole (9); It also comprises a liquid oxygen container (12) and a detonator (13), wherein the liquid inlet end of the drainage tube (4) is connected to the liquid oxygen container (12), and the connection end of the electronic igniter (3) is connected to the detonator (13).

5. A blasting construction structure according to claim 4, Features: The liquid inlet end of the drainage pipe (4) extends to 30 to 120 cm outside the blasting hole (9).

6. A blasting construction structure according to claim 4, Features: The backfill material (11) is mountain waste generated by opening the blasting hole (9).

7. A blasting construction structure according to claim 4, Features: The connection ends of all the electronic igniters (3) are connected in series with each other and connected to the detonator (13).

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