CN210346501U - A all round hole loaded constitution for tunnel smooth blasting - Google Patents
A all round hole loaded constitution for tunnel smooth blasting Download PDFInfo
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- CN210346501U CN210346501U CN201921195318.4U CN201921195318U CN210346501U CN 210346501 U CN210346501 U CN 210346501U CN 201921195318 U CN201921195318 U CN 201921195318U CN 210346501 U CN210346501 U CN 210346501U
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Abstract
The utility model belongs to the technical field of the tunnel construction, concretely relates to all edge margin hole loaded constitution for tunnel plain noodles blasting, it is long to have solved current blasting structure operating time, be unfavorable for the site operation progress, cost control, including setting up the explosive filling tube in all edge margin hole, the explosive filling tube is one end closed one end open-ended tubular structure, the explosive filling tube is inside to be provided with a plurality of groups of explosives and interval sand along the axial interval from closed end position, the explosive outside that is close explosive filling tube open position is provided with the stemming, it is provided with the explosive fuse to hug closely explosive filling tube inner wall, the one end and the most inboard explosive of explosive fuse link to each other, the other end of explosive fuse stretches out the explosive filling tube outside. The utility model discloses structural style can further reduce all ring edge reason eye explosive quantity, reduces the blasting to the destruction of cliff, will blast all ring edge reason eye structure and set up to whole, and the not only potential safety hazard of standardized processing preparation is little, and later stage installation rate is fast moreover, is convenient for utilize the quick construction of site organization, can effective reduce cost.
Description
Technical Field
The utility model belongs to the technical field of the tunnel construction, concretely relates to all ring edge eyes loaded constitution for tunnel smooth blasting.
Background
The smooth blasting technology is the most critical process for controlling the ultra-short excavation of the tunnel, protecting surrounding rocks around the tunnel so as to reduce safety risk and improve the excavation profile quality of the tunnel, and the most critical technology in the smooth blasting is the charging amount and the charging structure of peripheral eyes. At present, the commonly used peripheral hole explosive filling structures are mainly two, one is bamboo chip bound explosive used in the early stage to realize interval explosive filling, and the other is water bag interval explosive filling which is raised in recent years. Above two kinds of modes all need on-the-spot preparation stemming, because there is certain space between stemming and the drilling wall, can lead to explosive energy loss great, indirectly leads to the quantity increase of explosive, and above two kinds of modes realize that interval powder charge all has certain requirement to every section of explosive length simultaneously, and explosive spacing distance receives very big restriction, and the blasting in-process explosive is concentrated to the effort ratio of cliff, and is big to cliff destructive action. In addition, the two modes have long operation time, and are not beneficial to field construction progress and cost control.
Disclosure of Invention
In order to overcome exist not enough among the prior art, the utility model provides a all ring edge eye loaded constitution for tunnel smooth blasting to further reduce among the prior art all ring edge eye explosive quantity, the protection cliff improves charging efficiency, reduce cost.
The utility model discloses a realize through following technical scheme: the utility model provides a peripheral hole loaded constitution for tunnel smooth blasting, including setting up the explosive filling tube in the peripheral hole blast hole, the explosive filling tube is one end closed one end open-ended tubular structure, the inside of explosive filling tube is provided with a plurality of groups of explosives and interval sand along the axial interval from closed end position, the explosive outside that is close explosive filling tube open position is provided with the stemming, stemming length is greater than 100 centimetres and is less than 150 centimetres, the stemming is greater than 5 centimetres less than 10 centimetres apart from the distance of explosive filling tube open end, hug closely the explosive filling tube inner wall and be provided with the detonating cord, the one end and the most inboard explosive of detonating cord link to each other, the other end of detonating cord stretches out outside the explosive filling tube.
The explosive filling pipe adopts any one of PVC pipe, PPR pipe, and the external diameter of explosive filling pipe is less than all edges of hole blast hole diameter 5 ~ 12 millimeters.
The interval sand is formed by mixing sand and water and then extruding, and the stemming is formed by mixing and stirring clay and water.
Compared with the prior art, the utility model beneficial effect who has is:
the utility model can further reduce the explosive amount of the peripheral holes, reduce the damage of the blasting to the rock wall, and is very suitable for special sections with strict requirements on blasting vibration speed; furthermore, because the utility model discloses a preprocessing structure sets up blasting all edges of the eye structure into whole, and the not only potential safety hazard of standardized processing preparation is little, and later stage installation rate is fast moreover, is convenient for utilize the quick construction of site organization, can effective reduce cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numbers in the figures: 1-explosive filling pipe, 2-explosive, 3-spacing sand, 4-detonating cord, 5-stemming and 6-peripheral hole blast holes.
Detailed Description
It is right to refer to fig. 1 the utility model discloses it is right to refer to the figure 1, a all round hole loaded constitution for tunnel smooth blasting, including setting up explosive filling tube 1 in all round hole blast hole 6, explosive filling tube 1 is one end closed end open-ended tubular structure, 1 inside from closed end position of explosive filling tube plays to be provided with a plurality of groups of explosives 2 and interval sand 3 along the axial interval, 2 outsides of explosive that are close 1 open end position of explosive filling tube are provided with stemming 5, stemming 5 length is greater than 100 centimetres and is less than 150 centimetres, stemming 5 is greater than 5 centimetres and is less than 10 centimetres apart from the distance of 1 open end of explosive filling tube, it is provided with detonating cord 4 to hug closely 1 inner wall of explosive filling tube, detonating cord 4's one end links to each other with 2 innermost side explosives, detonating cord 4's the other end stretches.
The explosive filling pipe 1 is any one of a PVC pipe and a PPR pipe, and the outer diameter of the explosive filling pipe 1 is smaller than the diameter of a blast hole 6 of a peripheral hole by 5-12 mm.
The making and using methods of the present invention will be described in detail with reference to the following examples:
firstly, a PVC pipe is used as an explosive filling pipe 1, the diameter of the explosive filling pipe 1 is selected to be 30 mm, one end of the explosive filling pipe 1 is plugged by a plastic sheet and is ensured to be stable, and an explosive 2 is firstly placed in the explosive filling pipe 1 and a detonating cord 4 is preset.
Further, the spacing sand 3 is placed, and the spacing sand 3 is formed by extrusion after the sand and water are mixed. Specifically, the spacing sand 3 is prepared from sand and water on site, a proper amount of sand is poured into the explosive filling pipe 1 according to needs, a proper amount of water is added, and the spacing sand 3 is formed after the spacing sand is extruded and compacted by a wooden gun rod.
According to the steps, a plurality of groups of explosives 2 and spacing sands 3 are arranged at intervals respectively. Further, pack stemming 5 in the explosive filling tube 1 in the last 2 outsides of a set of explosive, stemming 5 is formed by clay and water mixing stirring, guarantees that detonating cord 4 extends the outside certain length of explosive filling tube 1 all the time in the course of working to satisfy the blasting requirement.
The utility model discloses processing is accomplished and is treated stemming 5 solidification back, accomplishes final all ring edge eyes loaded constitution that is used for tunnel smooth surface blasting, collect reserve through the special messenger can.
Before use, firstly, drilling is carried out, the drilling depth is according to the actual design requirement, the length of the peripheral hole blast hole 6 is usually 3.5 meters, and the drilling is carried out by a drill bit with the diameter of 42 millimeters. During the blasting, with above-mentioned processing completion the utility model discloses put into all ring edge reason hole blast hole 6 in to reserve detonating cord 4 and establish in all ring edge reason hole blast hole 6 outsides. In consideration of the safety of blasting, the blast holes 6 of the peripheral holes can also be blocked to a certain extent by using soil.
And finally, performing centralized blasting by personnel with professional blasting qualification.
Claims (4)
1. A peripheral hole loaded constitution for tunnel smooth blasting, is including setting up explosive filling tube (1) in peripheral hole big gun hole (6), its characterized in that: the explosive filling pipe (1) is a tubular structure with one closed end and one open end, a plurality of groups of explosives (2) and spaced sand (3) are axially arranged inside the explosive filling pipe (1) at intervals from the closed end, stemming (5) is arranged on the outer side of the explosive (2) close to the open end of the explosive filling pipe (1), the length of the stemming (5) is greater than 100 cm and less than 150 cm, the distance between the stemming (5) and the open end of the explosive filling pipe (1) is greater than 5 cm and less than 10 cm, a detonating cord (4) is arranged on the inner wall of the explosive filling pipe (1) in a closely attached mode, one end of the detonating cord (4) is connected with the innermost explosive (2), and the other end of the detonating cord (4) extends out of the explosive filling pipe (1).
2. A peripheral eye charge configuration for smooth blasting in tunnels according to claim 1, wherein: the explosive filling pipe (1) adopts any one of a PVC pipe and a PPR pipe, and the outer diameter of the explosive filling pipe (1) is 5-12 mm smaller than the diameter of the blast holes (6) of the peripheral holes.
3. A peripheral eye charge configuration for smooth blasting in tunnels according to claim 1, wherein: the spacing sand (3) is formed by extrusion after mixing sand and water.
4. A peripheral eye charge configuration for smooth blasting in tunnels according to claim 1, wherein: the stemming (5) is formed by mixing and stirring clay and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921195318.4U CN210346501U (en) | 2019-07-27 | 2019-07-27 | A all round hole loaded constitution for tunnel smooth blasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921195318.4U CN210346501U (en) | 2019-07-27 | 2019-07-27 | A all round hole loaded constitution for tunnel smooth blasting |
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| Publication Number | Publication Date |
|---|---|
| CN210346501U true CN210346501U (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921195318.4U Active CN210346501U (en) | 2019-07-27 | 2019-07-27 | A all round hole loaded constitution for tunnel smooth blasting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414243A (en) * | 2020-11-11 | 2021-02-26 | 中国人民解放军陆军工程大学 | Charging structure for hydraulic blasting and manufacturing method thereof |
| CN114234748A (en) * | 2021-11-23 | 2022-03-25 | 煤炭科学研究总院 | Underground coal mine deep hole blasting method |
-
2019
- 2019-07-27 CN CN201921195318.4U patent/CN210346501U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414243A (en) * | 2020-11-11 | 2021-02-26 | 中国人民解放军陆军工程大学 | Charging structure for hydraulic blasting and manufacturing method thereof |
| CN114234748A (en) * | 2021-11-23 | 2022-03-25 | 煤炭科学研究总院 | Underground coal mine deep hole blasting method |
| CN114234748B (en) * | 2021-11-23 | 2023-03-28 | 煤炭科学研究总院 | Underground coal mine deep hole blasting method |
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