CN111238325B - Special expansion blasting element for underground blasting engineering - Google Patents
Special expansion blasting element for underground blasting engineering Download PDFInfo
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- CN111238325B CN111238325B CN202010254302.7A CN202010254302A CN111238325B CN 111238325 B CN111238325 B CN 111238325B CN 202010254302 A CN202010254302 A CN 202010254302A CN 111238325 B CN111238325 B CN 111238325B
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- explosion
- fixed block
- explosive
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- sealing plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
Abstract
The invention discloses a special explosion expanding element for underground blasting engineering, which belongs to the field of blasting equipment and blasting engineering and comprises a fixed block, wherein the fixed block is divided into a finned section and a barrel section, the fixed block is provided with a fixed block central hole, the fixed block central hole penetrates through the finned section and the barrel section, one end of the finned section, which is far away from the barrel section, is closed, and three to six finned blocks are arranged on the periphery of the fixed block central hole of the finned section; the explosion-expanding explosive column pipe shell is internally provided with an explosion-expanding explosive column in a pressing manner and is positioned at the bottom of the finned section of the central hole; the center of the sealing plug is provided with a sealing plug center hole, and the sealing plug is arranged in the center hole of the fixed block and is in contact with the end face of the explosive expanding column; the invention can realize automatic assembly, has high production efficiency and low cost, and simultaneously solves the problems of explosion rejection caused by the compression of adjacent detonators by detonation waves or explosion rejection of explosives caused by a groove effect in underground blasting engineering.
Description
Technical Field
The invention relates to the field of blasting equipment and blasting engineering, in particular to a special explosion expanding element for underground blasting engineering.
Background
With the increase of industrial concentration of the national blasting industry, individuation of blasting equipment and development of engineering blasting technology, various low-sensitivity explosives such as mixed explosives and the like become the leading direction of blasting materials and are also the strict requirements of national public safety on explosives. For the trend, the expansion of the initiation energy of the detonator is not the optimal choice, and the traditional method adopts an initiator, but the initiator has complex manufacturing process and high cost and uses toxic explosive materials such as TNT and the like.
In addition, in underground blasting, particularly tunnel blasting engineering, the phenomena of the refusal of explosion or the refusal of explosion of individual detonators often exist due to the extrusion of an adjacent detonator or explosive by a first-explosion detonator caused by detonation wave effect, groove effect and the like. Therefore, it is necessary to develop a low-cost explosion-expanding element capable of effectively blocking the anti-detonation wave effect or the trench effect, so that the cost can be reduced, the energy of the detonating explosive can be expanded, and the improvement of the blasting effect can be promoted or guaranteed to a certain extent.
At present, although a high-power detonating primer is developed by individual units at home and abroad, although the primer without primer sensitivity can be detonated, the problem of the misfire of the primer or the explosive in underground blasting, particularly tunnel blasting engineering, still cannot be solved due to the structural reasons, the cost is high, the explosive columns can be taken out, the pressure is brought to public safety and product storage, and the great potential safety hazard is brought to the disposal of blind guns.
Disclosure of Invention
The invention aims to provide a special explosion expanding element for underground blasting engineering to solve the problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the special explosion expanding element for the underground blasting engineering comprises a fixed block, wherein the fixed block is divided into a fin section and a barrel section, the fixed block is provided with a fixed block center hole, the fixed block center hole penetrates through the fin section and the barrel section, one end of the fin section, which is far away from the barrel section, is closed, and three to six fin blocks are arranged on the periphery of the fixed block center hole of the fin section; the explosion-expanding explosive column tube shell is internally provided with an explosion-expanding explosive column in a pressing manner and is positioned at the bottom of the finned section of the central hole of the fixed block; the explosion-proof explosive device is characterized by further comprising a sealing plug, wherein a sealing plug center hole used for installing a detonator or a detonating cord is formed in the center of the sealing plug, and the sealing plug is installed in the fixing block center hole and is in contact with the end face of the explosion-proof explosive column.
When the explosive is used, a detonator or a detonating cord is directly inserted into the central hole of the sealing plug and directly contacts with the end face of the explosive expanding column, the element is reversely loaded into a blast hole (the finned section faces the direction of a blast orifice), then mixed explosive or explosive sticks are injected, and the explosive sticks are slightly pushed to the finned section by a blast rod, so that the purposes of effective contact and reliable initiation can be realized.
The fixed block provided with the fin-divided section is the most important invention point of the invention, the bottom of the fixed block is closed, the space of the fin-divided section area is used as an area which is effectively contacted with explosive, the fin block can effectively cut an industrial explosive cartridge, and the upper cavity of the fin block and the gap between a detonator or a detonating cord and a tube shell of a detonating powder column can effectively obstruct or slow down the damage effect of detonation waves on the detonator; the space above the wing-dividing section and the central pore cavity play the role of a reflecting surface and can obviously weaken or obstruct the damage of detonation waves to the detonator.
As a preferred technical scheme: the number of the fin blocks is four, and the fin blocks are uniformly distributed on the periphery of the central hole of the fixed block.
The number of the wing blocks can be three to six, and the wing blocks can play a role in guiding the explosive to enter a blast hole, cutting a cartridge and the like, but a gap or a space between two connected wing blocks is used as a space for accommodating the explosive and is used for enabling the explosive to be in close contact with an explosion expansion element so as to achieve an effective detonation effect, the number of the wing blocks is preferably three to six, and the effect of enabling the explosive to be in close contact with the explosion expansion element cannot be achieved if the number of the wing blocks is too large; from the viewpoints of structural stability and manufacturing cost, etc., it is preferable to employ four fin blocks, i.e., a quarter fin structure.
As a preferred technical scheme: the fixed block is made of PP (polypropylene), modified plastics or metal materials, the outer diameter of the fixed block is 32-100 mm, the width of the fin block is 10-30 mm, and the thickness of the fin block is 1-6 mm.
The fixing block is made of high-quality plastic preferably, has certain thickness and good toughness, under normal operating conditions and blasting environments, sharp objects (such as broken stones in blast holes) cannot damage the shell, the sealing plug is well matched with the detonator or the detonating cord, and waterproof quick-drying glue (such as modified epoxy resin) is preferably coated on the joint of the sealing plug and the detonator or the detonating cord, so that the water resistance can be controlled.
As a preferred technical scheme: the explosion-expanding explosive column tube shell is made of metal materials, the outer diameter is 14-30 mm, and the height is 50-80 mm.
As a preferred technical scheme: the material of the expansion explosive column is single-substance high explosive or mixed high explosive, and the density of the expansion explosive column is not lower than 1.5g/cm3The drug amount is 5-50 g/piece.
The explosive quantity of the high explosive column can be adjusted according to different blasting projects.
As a preferred technical scheme: the single-substance high explosive or the mixed high explosive is at least one of hexogen, Taian and octogen.
As a preferred technical scheme: the sealing plug is made of rubber or flexible plastic.
As a preferred technical scheme: the diameter of the central hole of the sealing plug is matched with that of an 8# detonator or a detonating cord.
The explosion expanding element is provided with high-density high explosive columns in a pressing mode, the actual test explosion velocity is more than 7500m/s, and porous granular ammonium nitrate fuel oil explosives without sensitization emulsion matrix and detonator sensitivity can be detonated, so that the explosion expanding element has excellent detonation performance and can achieve the detonation efficiency of a detonator, and in addition, the underground tunnel blasting engineering does not use a precedent of the detonator, and the explosion expanding element has the function of dual use on the ground and underground;
the invention is designed aiming at the blank, and can solve the problem that the mixed explosive without detonator sensitivity in normal use of the underground tunnel blasting engineering is detonated.
In summary, one of the most important technical effects of the present invention is that the explosion-extending element provided by the present invention can solve the problem of explosion rejection during underground blasting, especially tunnel blasting, and the problem of explosion rejection can be solved by the present invention, which is based on the following reasons: firstly, a detonator or a detonating cord is arranged in a sealing plug, a gap is arranged between the sealing plug and a fixed block, a gap is also arranged between the detonator or the detonating cord and the sealing plug, after peripheral blast holes are detonated, when an explosion stress wave is propagated to the explosion expanding element, the explosion stress wave can be reflected at the joint of the fixed block and the sealing plug and the joint of the sealing plug and the detonator or the detonating cord, the intensity of the explosion stress wave is greatly attenuated, the compression degree of the detonator is greatly reduced, and the normal initiation of the detonator is ensured; in addition, the explosion expanding element has large initiation energy (because of using high explosive and high density of explosive column), which is far higher than the energy of detonator, the detonation velocity can reach more than 7500m/s, and various industrial explosives can be normally detonated, thus further solving the problem of explosive refusal.
Compared with the prior art, the invention has the advantages that: the explosion expanding element has the advantages of simple structure, quick assembly, convenient use, low manufacturing cost, excellent initiation performance, safety and no pollution, can realize automation in the manufacturing process, has high production efficiency and low cost, can be widely used for underground blasting engineering or outdoor blasting, is used for initiating various mixed explosives or industrial explosives with lower sensitivity, has no strict requirements on the type and the granularity of high explosives, has good water resistance, simultaneously solves the problem of explosive refusal caused by the explosion refusal or the groove effect caused by the compression of adjacent detonators by detonation waves in the underground blasting engineering, can replace the traditional detonating tool or other high-power detonating bodies, and has obvious market advantages.
Drawings
FIG. 1 is a schematic structural diagram of an explosion-amplifying element in example 1 of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a perspective view of a fixing block in embodiment 1 of the present invention;
FIG. 4 is a schematic structural diagram of a quad-fin fixing block according to embodiment 1 of the invention;
fig. 5 is a schematic structural view of an explosion-expanding explosive column in embodiment 1 of the present invention.
In the figure: 1. a fixed block; 11. dividing into wing sections; 12. a barrel section; 13. a central hole of the fixed block; 14. a fin block; 2. expanding the explosive column casing; 3. an explosive expanding column; 4. sealing the plug; 5. a detonator; 6. sealing the central hole of the plug; k1, upper cavity; k2, void.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1:
referring to fig. 1-5, the special explosion expanding element for the underground explosion engineering comprises a fixed block 1, wherein the fixed block 1 is divided into a fin section 11 and a barrel section 12, the fixed block 1 is provided with a fixed block center hole 13, the fixed block center hole 13 penetrates through the fin section 11 and the barrel section 12, one end of the fin section 11 far away from the barrel section 12 is closed, four fin blocks 14 are uniformly arranged on the periphery of the fixed block center hole 13 of the fin section 11, the included angle between every two adjacent fin blocks 14 is 90 degrees, and the periphery of each fin block 14 is flush with the periphery of the barrel section 12;
the explosion-expanding explosive column pipe shell 2 is internally provided with an explosion-expanding explosive column 3 in a pressing manner, and the explosion-expanding explosive column pipe shell 2 is positioned at the bottom of the finned section 11 of the central hole 13 of the fixed block; the explosion-proof explosive column is characterized by further comprising a sealing plug 4, wherein the center of the sealing plug 4 is provided with a sealing plug center hole 6 for mounting a detonator 5 (certainly, a detonating cord can be mounted, and the detonator is taken as an example in the embodiment), and the sealing plug 4 is mounted in the fixing block center hole 13 and is in contact with the end face of the explosion-proof explosive column 3;
in this embodiment, the fixing block 1 is made of PP, the explosive expansion column casing 2 is made of metal (mainly steel, copper or aluminum), the explosive expansion column 3 is made of hexogen and taian mixed explosive, the density is 1.6g/cm3, the explosive amount is 15 g/explosive, the outer diameter of the explosive expansion column is 15mm, and the height is 50 mm.
When blasting operation is carried out, firstly, the 8# detonator 5 is inserted into the sealing plug central hole 6 in the sealing plug 4 and is in direct contact with the explosive expanding column 3, the explosive is reversely loaded into a blast hole (the finned section 11 faces to the direction of an orifice), then mixed explosive or explosive cartridge is loaded to be in close contact, the detonator 5 is placed in the sealing plug 4, and the upper cavity K1 of the fixed block 1 and the gap K2 between the sealing plug 4 and the fixed block 1 can effectively block or slow down the damage effect of detonation waves on the detonator.
When the 8# detonator 5 is detonated, the explosive expanding column 3 is detonated, and then the explosive in the blast hole is detonated, so that the blasting operation is completed.
The test detonation velocity of the embodiment is 8000m/s, and the method is particularly suitable for tunnel blasting.
Example 2:
the number of the fin blocks is three, the included angle between two adjacent fin blocks is 120 degrees, the fixed block 1 is made of modified plastics, the shell of the expansion explosive column is made of metal (mainly steel, copper or aluminum), the expansion explosive column is made of octogen, the density of the expansion explosive column is 1.8g/cm3, and the explosive amount is 30 g/piece; the outer diameter of the explosive expanding column was 30mm, the height was 30mm, and the rest was the same as in example 1.
The test detonation velocity of the embodiment is 8800m/s, and is particularly suitable for tunnel blasting.
Example 3:
the number of the fin blocks of this embodiment is six, the included angle between two adjacent fin blocks is 60 °, and the rest is the same as that of embodiment 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a special expansion element of underground blasting engineering which characterized in that: the fixed block is divided into a fin section and a barrel section, the fixed block is provided with a fixed block central hole, the fixed block central hole penetrates through the fin section and the barrel section, one end of the fin section, far away from the barrel section, is closed, and the periphery of the fixed block central hole of the fin section is provided with three to six fin blocks; the explosion-expanding explosive column pipe shell is internally provided with an explosion-expanding explosive column in a pressing manner and is positioned at the bottom of the finned section of the central hole of the fixed block; the explosion-proof explosive device is characterized by further comprising a sealing plug, wherein a sealing plug center hole used for installing a detonator or a detonating cord is formed in the center of the sealing plug, and the sealing plug is installed in the fixing block center hole and is in contact with the end face of the explosion-proof explosive column.
2. The special explosion expanding element for the underground blasting engineering according to claim 1, wherein: the number of the fin blocks is four, and the fin blocks are uniformly distributed on the periphery of the central hole of the fixed block.
3. The special explosion expanding element for the underground blasting engineering according to claim 1, wherein: the fixed block is made of PP (polypropylene), modified plastics or metal materials, the outer diameter of the fixed block is 32-100 mm, the width of the fin block is 10-30 mm, and the thickness of the fin is 1-6 mm.
4. The special explosion expansion element for underground blasting engineering according to claim 1, characterized in that: the explosion-expanding explosive column tube shell is made of metal materials, the outer diameter is 14-30 mm, and the height is 50-80 mm.
5. Underground blasting engineering special for engineering according to claim 1The explosion expanding element is characterized in that: the material of the expansion explosive column is single-substance high explosive or mixed high explosive, and the density of the expansion explosive column is not lower than 1.5g/cm3The drug amount is 5-50 g/piece.
6. The special explosion expanding element for the underground blasting engineering according to claim 5, wherein: the single-substance high explosive or the mixed high explosive is at least one of hexogen, Taian and octogen.
7. The special explosion expanding element for the underground blasting engineering according to claim 1, wherein: the sealing plug is made of rubber or flexible plastic.
8. The special explosion expanding element for the underground blasting engineering according to claim 1, wherein: the diameter of the central hole of the sealing plug is matched with that of an 8# detonator or a detonating cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010254302.7A CN111238325B (en) | 2020-04-02 | 2020-04-02 | Special expansion blasting element for underground blasting engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010254302.7A CN111238325B (en) | 2020-04-02 | 2020-04-02 | Special expansion blasting element for underground blasting engineering |
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| Publication Number | Publication Date |
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| CN111238325A CN111238325A (en) | 2020-06-05 |
| CN111238325B true CN111238325B (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010254302.7A Active CN111238325B (en) | 2020-04-02 | 2020-04-02 | Special expansion blasting element for underground blasting engineering |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB951626A (en) * | 1960-09-09 | 1964-03-11 | Dow Chemical Co | A method of blasting earth formations |
| GB998757A (en) * | 1963-06-20 | 1965-07-21 | Canadian Ind | Detonator holding device |
| GB1127279A (en) * | 1966-05-02 | 1968-09-18 | Canadian Ind | Explosive booster assembly |
| EP0150645A2 (en) * | 1984-01-27 | 1985-08-07 | Societe Nationale Des Poudres Et Explosifs | Fuse assembly for a detonator charge |
| US6112666A (en) * | 1994-10-06 | 2000-09-05 | Orica Explosives Technology Pty. Ltd. | Explosives booster and primer |
| CN105674809A (en) * | 2016-03-03 | 2016-06-15 | 威海埃姆提爱矿山设备有限公司 | Spider foot-shaped detonation bomb locating rack |
| CN106091838A (en) * | 2016-06-17 | 2016-11-09 | 雅化集团绵阳实业有限公司 | A kind of high-power priming device |
-
2020
- 2020-04-02 CN CN202010254302.7A patent/CN111238325B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB951626A (en) * | 1960-09-09 | 1964-03-11 | Dow Chemical Co | A method of blasting earth formations |
| GB998757A (en) * | 1963-06-20 | 1965-07-21 | Canadian Ind | Detonator holding device |
| GB1127279A (en) * | 1966-05-02 | 1968-09-18 | Canadian Ind | Explosive booster assembly |
| EP0150645A2 (en) * | 1984-01-27 | 1985-08-07 | Societe Nationale Des Poudres Et Explosifs | Fuse assembly for a detonator charge |
| US6112666A (en) * | 1994-10-06 | 2000-09-05 | Orica Explosives Technology Pty. Ltd. | Explosives booster and primer |
| CN105674809A (en) * | 2016-03-03 | 2016-06-15 | 威海埃姆提爱矿山设备有限公司 | Spider foot-shaped detonation bomb locating rack |
| CN106091838A (en) * | 2016-06-17 | 2016-11-09 | 雅化集团绵阳实业有限公司 | A kind of high-power priming device |
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| CN111238325A (en) | 2020-06-05 |
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