CN207147332U - A kind of Tunnel Blasting steel for shot structure - Google Patents
A kind of Tunnel Blasting steel for shot structure Download PDFInfo
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- CN207147332U CN207147332U CN201720895952.3U CN201720895952U CN207147332U CN 207147332 U CN207147332 U CN 207147332U CN 201720895952 U CN201720895952 U CN 201720895952U CN 207147332 U CN207147332 U CN 207147332U
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- keyhole
- outer layer
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Abstract
The close hole curtain in edge, the hole slot group that the close hole curtain in edge forms for the semicircle arcuation aggregation that drilling is formed uniformly circumferentially are offered the utility model discloses a kind of Tunnel Blasting steel for shot structure, including along by the excavation contour line edge of the face of explosion；Several outer layer keyholes and several internal layer keyholes are offered in face, outer layer keyhole and internal layer keyhole are respectively positioned on the inner side of the close hole curtain in edge；The vertical face of the outer layer keyhole and internal layer keyhole is set, and blown-out shot hole is provided between outer layer keyhole and internal layer keyhole；The arrangement that the utility model forms equilateral triangle by two neighboring internal layer keyhole with neighbouring outer layer keyhole is set, carry out explosion from inside to outside successively, so that the effect of explosion is more preferable, blown-out shot hole position is between internal layer keyhole and outer layer keyhole, caused impact in blasting process can significantly be weakened so that the progress that the collapse process of ground can uniformly relax.
Description
Technical field
Blasting engineering technical field is the utility model is related to, specifically a kind of Tunnel Blasting steel for shot structure.
Background technology
Explosion be using explosive exploded in empty gas and water, native stone medium or object caused by compression, loosen, destroy, throw
Throw and lethal effect, a special kind of skill to accomplish the end in view.The scope of research includes：The property and application method of explosive, fire tool,
Detonation of the powder charge pack in various media, powder charge is to the contact demolition and non-contact demolition of target, all kinds of bursting works
Tissue and implementation.Tunnel refers to dig out the passage come in existing building or rock structure, is the work being embedded in stratum
Journey building, it is a kind of form of human use's underground space.Tunnel can be divided into traffic tunnel, Hydraulic Tunnel, municipal tunnel, ore deposit
Mountain tunnel.
, it is necessary to carry out explosion treatment to ground before being excavated to tunnel, in tunnel blasting excavation operation, draw
Groove explosion is typically to shake the main reason for exceeded, and engineer would generally bore some not during blasting hole bore operation
The blown-out shot hole of blasting charge carries out rationally arrangement energy come to reduce concussion of blasting for the position between blown-out shot hole and keyhole
The effective quality for improving explosion, reduces concussion of blasting.
Utility model content
The purpose of this utility model is to provide a kind of Tunnel Blasting steel for shot structure, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the utility model provides following technical scheme：
A kind of Tunnel Blasting steel for shot structure, including along by the excavation contour line edge of the face of explosion uniformly circumferentially
Offer the close hole curtain in edge, the hole slot group that the close hole curtain in edge forms for the semicircle arcuation aggregation that drilling is formed；Opened up in face
There are several outer layer keyholes and several internal layer keyholes, outer layer keyhole and internal layer keyhole are respectively positioned on the close hole curtain in edge
Inner side；The vertical face of the outer layer keyhole and internal layer keyhole is set, and is set between outer layer keyhole and internal layer keyhole
There is free blasthole, two neighboring internal layer keyhole forms equilateral triangle arrangement, outer layer keyhole point with neighbouring outer layer keyhole
Cloth longitudinal direction inside the periphery of internal layer keyhole, face offers several longitudinal keyholes.
As further improvement of the utility model scheme, the angle between adjacent longitudinal keyhole is 20 to four
Between ten degree.
As further improvement of the utility model scheme, the diameter in the blown-out shot hole is less than the diameter of internal layer keyhole.
Compared with prior art, the beneficial effects of the utility model are：
The utility model forms the row of equilateral triangle by two neighboring internal layer keyhole with neighbouring outer layer keyhole
Cloth is set, and carries out explosion from inside to outside successively so that the effect of explosion is more preferable, and blown-out shot hole position is in internal layer keyhole and outer layer slotting
Between hole, it can significantly weaken caused impact in blasting process so that what the collapse process of ground can uniformly relax
Carry out, avoid excessive concussion of blasting；Set angled longitudinal keyhole is used to place rendrock, can be from longitudinal shape
Into impulsive force from inside to outside, impacted with reference to transverse blast of the explosive in internal layer keyhole, outer layer keyhole vertically with face,
Ground is enabled to obtain the blasting impact of various dimensions, explosion is more efficient, can save rendrock.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the enlarged diagram in A portions in Fig. 1；
In figure：1- faces, 2- blown-out shots hole, the close hole curtain in 3- edges, 4- outer layers keyhole, 5- internal layers keyhole, 6- are excavated
Contour line, 7- longitudinal directions keyhole.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment：
Fig. 1-2, a kind of Tunnel Blasting steel for shot structure, including edge are referred to by the outline excavation of the face 1 of explosion
The edge of line 6 uniformly circumferentially offers the close hole curtain 3 in edge, the hole that the close hole curtain 3 in edge forms for the semicircle arcuation aggregation that drilling is formed
Groove group；Several outer layer keyholes 4 and several internal layer keyholes 5 are offered in face 1, outer layer keyhole 4 and internal layer are drawn
Slotted eye 5 is respectively positioned on the inner side of the close hole curtain 3 in edge；The vertical face 1 of the outer layer keyhole 4 and internal layer keyhole 5 is set, outside
Blown-out shot hole 2 is provided between layer keyhole 4 and internal layer keyhole 5；Two neighboring internal layer keyhole 5 and neighbouring outer layer keyhole 4
Equilateral triangle arrangement is formed, outer layer keyhole 4 is distributed in the periphery of internal layer keyhole 5, if the inside of face 1 longitudinal direction offers
Dry longitudinal keyhole 7.
Before explosion is carried out, the rendrock used in explosion is filled into outer layer keyhole 4 and internal layer keyhole 5, entered
One step, the inside of face 1 longitudinal direction is offered into several longitudinal keyholes 7, longitudinal inside of keyhole 7 loads upper explosion and used
Explosive；Rendrock in rendrock and outer layer keyhole 4 is ignited in internal layer keyhole 5 successively, and internal layer keyhole 5 and outer layer are drawn
The impulsive force of radial direction is formed inside slotted eye 4 due to the blast of explosive, it is set between internal layer keyhole 5 and outer layer keyhole 4
Blown-out shot hole 2 impacted, not only promote collapsing and being disintegrated for ground, while hollow structure is to the impact inside face 1
Ripple is weakened and buffered so that blasting process is more steady.Explosion is placed into set angled longitudinal keyhole 7
Explosive, rendrock can hang down from the impulsive force being longitudinally formed from inside to outside with reference to explosive in internal layer keyhole 5, outer layer keyhole 4
Directly the transverse blast with face 1 impacts so that ground can obtain the blasting impact of various dimensions, and explosion is more efficient, can save
Save the use of rendrock.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (3)
1. a kind of Tunnel Blasting steel for shot structure, it is characterised in that including along by the excavation contour line of the face (1) of explosion
(6) edge uniformly circumferentially offers the close hole curtain (3) in edge, and the close hole curtain (3) in edge forms for the semicircle arcuation aggregation that drilling is formed
Hole slot group；Several outer layer keyholes (4) and several internal layer keyholes (5), outer layer keyhole are offered in face (1)
(4) and internal layer keyhole (5) is respectively positioned on the inner side of the close hole curtain (3) in edge；The outer layer keyhole (4) and internal layer keyhole (5)
Vertical face (1) is set, and blown-out shot hole (2) are provided between outer layer keyhole (4) and internal layer keyhole (5), two neighboring interior
Layer keyhole (5) forms equilateral triangle arrangement with neighbouring outer layer keyhole (4), and outer layer keyhole (4) is distributed in internal layer and drawn
The periphery of slotted eye (5), the internal longitudinal direction of face (1) offer several longitudinal keyholes (7).
2. Tunnel Blasting steel for shot structure according to claim 1, it is characterised in that adjacent longitudinal keyhole (7) it
Between angle be 20 to four ten degree between.
3. Tunnel Blasting steel for shot structure according to claim 1, it is characterised in that the diameter of blown-out shot hole (2) is less than
The diameter of internal layer keyhole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720895952.3U CN207147332U (en) | 2017-07-21 | 2017-07-21 | A kind of Tunnel Blasting steel for shot structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720895952.3U CN207147332U (en) | 2017-07-21 | 2017-07-21 | A kind of Tunnel Blasting steel for shot structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207147332U true CN207147332U (en) | 2018-03-27 |
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ID=61676558
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720895952.3U Active CN207147332U (en) | 2017-07-21 | 2017-07-21 | A kind of Tunnel Blasting steel for shot structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514079A (en) * | 2019-09-11 | 2019-11-29 | 中交路桥建设有限公司 | A kind of right angled triangle presplit cut method |
-
2017
- 2017-07-21 CN CN201720895952.3U patent/CN207147332U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514079A (en) * | 2019-09-11 | 2019-11-29 | 中交路桥建设有限公司 | A kind of right angled triangle presplit cut method |
| CN110514079B (en) * | 2019-09-11 | 2021-09-14 | 中交路桥建设有限公司 | Right-angled triangle presplitting cut method |
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