CN211552623U - Hole-by-hole detonating network for trenching blasting - Google Patents
Hole-by-hole detonating network for trenching blasting Download PDFInfo
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- CN211552623U CN211552623U CN201922307608.XU CN201922307608U CN211552623U CN 211552623 U CN211552623 U CN 211552623U CN 201922307608 U CN201922307608 U CN 201922307608U CN 211552623 U CN211552623 U CN 211552623U
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Abstract
The utility model discloses a dig ditch blasting with hole-by-hole blasting net, include: the blast holes are arranged in an explosion area in a rectangular array mode, a detonating point is arranged in the blast hole positioned in the center of the array, the detonating point is connected with the blast hole positioned right above the detonating point through a section of longitudinal delay detonator, the detonating point is connected with the blast hole positioned right below the detonating point through a section of longitudinal delay detonator, the detonating point is connected with the blast hole positioned on one side of the detonating point through a section of transverse delay detonator, and the detonating point is connected with the blast hole positioned on the other side of the detonating point through a section of transverse delay detonator; the rest blast holes which are arranged transversely are connected in series through three sections of transverse delay detonators. The utility model discloses be favorable to digging ditch regional boundary neat, adopt to create the free surface for adjacent big gun hole by hole detonating, ensure that the blasting has more abundant free surface than ordinary blasting to great improvement blasting effect.
Description
Technical Field
The utility model relates to a dig ditch blasting with hole-by-hole blasting net is applied to open mine engineering blasting link.
Background
Surface mines are usually mined in several steps, and access ditches are passages between upper and lower steps for vehicles, machinery and personnel to access the slope of the pit. Compared with common blasting, the in-out channel blasting has the characteristics that the blasting lacks a free surface, the rock clamping performance is high, and meanwhile, higher requirements on blasting precision and vibration control are met.
The hole-by-hole initiation is to arrange high-precision detonating tube detonators between the earth surface and each blast hole in the hole, wherein the delay time of the earth surface detonators is generally in the millisecond level, the common range of the earth surface detonators is 0-150 milliseconds, and the delay time of the hole detonators is generally 200-1000 milliseconds. Through the time delay effect, the blasting at every time can be decomposed into blasting holes one by one to be detonated according to the designed blasting time delay sequence, the front hole creates a free surface for the rear hole, the blasting effect is improved, the blasting vibration is reduced, and the vibration influence of the blasting on peripheral personnel, machinery and buildings is effectively reduced. Utility model patent (CN 203364671U) provides a hole-by-hole detonation network. The utility model patent (CN201621141342.6) provides a leaf vein-shaped hole-by-hole detonating network. The two hole-by-hole detonating circuits are generally applied to normal step blasting, have poor pertinence when applied to trenching blasting, and are difficult to achieve the expected effect.
Disclosure of Invention
To the deficiencies of the prior art, the utility model provides a dig ditch blasting with hole-by-hole detonating network.
The utility model discloses a realize through following technical scheme.
A hole-by-hole initiation network for trenching blasting, the initiation network comprising: the blast holes are arranged in an explosion area in a rectangular array mode, a detonating point is arranged in the blast hole positioned in the center of the array, the detonating point is connected with the blast hole positioned right above the detonating point through a section of longitudinal delay detonator, the detonating point is connected with the blast hole positioned right below the detonating point through a section of longitudinal delay detonator, the detonating point is connected with the blast hole positioned on one side of the detonating point through a section of transverse delay detonator, and the detonating point is connected with the blast hole positioned on the other side of the detonating point through a section of transverse delay detonator; the rest blast holes which are arranged transversely are connected in series through three sections of transverse delay detonators.
According to the detonating circuit, the first-section longitudinal delay detonator, the first-section transverse delay detonator, the second-section longitudinal delay detonator and the second-section transverse delay detonator are distributed in a cross shape by taking a detonating point as a center.
According to the above detonating circuit, it is characterized in that the initiation point is provided with a detonating detonator.
According to the initiation network, the blasting holes are filled with explosives, and the delay detonators are connected among the blasting holes through delay detonation detonators in the holes.
According to the detonating network, the time delay duration of the section of transverse delay detonator is 0-20 ms.
According to the detonating network, the time delay duration of the two-section transverse delay detonator is 30-50 ms.
According to the detonating network, the time delay duration of the longitudinal delay detonator is 20-30 ms.
According to the detonating network, the time delay duration of the two-section longitudinal delay detonator is 50-75 ms.
According to the detonating circuit, the delay time of the delay detonating detonator in the hole is 200-1000 ms.
The utility model has the advantages of:
1. the initiation point is arranged at the center of the blast area, namely the center or the position near the center of the in-out ditch, so that the boundary of the trenching area is tidy, free surfaces can be created for adjacent blast holes by adopting hole-by-hole initiation, the more sufficient free surfaces of blasting compared with common blasting are ensured, and the blasting effect is greatly improved.
2. By utilizing the hole-by-hole detonation mode, the free surface can be increased when each subsequent blast hole detonates, thereby achieving the purpose of improving the blasting effect.
3. The hole-by-hole detonation mode can effectively reduce the influence of blasting vibration on the stability of the side slope and the surrounding environment of the pit.
4. By using the rectangular array hole distribution mode, the blasting influence range is controlled to be a rectangular area, and the trenching blasting precision is favorably improved.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a transverse cross-sectional view of the present invention.
Fig. 3 is a longitudinal sectional view of the present invention.
Fig. 4 is a schematic view of an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
A hole-by-hole detonating circuit for trenching blasting comprises: the detonator comprises a plurality of blast holes 1, a detonating point 2, a first-section longitudinal delay detonator 3, a second-section longitudinal delay detonator 4, a first-section transverse delay detonator 5, a second-section transverse delay detonator 6, a third-section transverse delay detonator 7 and a plurality of in-hole delay detonators 8;
the blast holes are arranged in an explosion area in a rectangular array mode, the initiation point is provided with an initiation detonator 9 and is arranged in the blast hole positioned in the center of the array, the initiation point 2 is connected with the blast hole positioned right above the initiation point through a section of longitudinal delay detonator 3, the initiation point 2 is connected with the blast hole positioned right below the initiation point through a section of longitudinal delay detonator 4, the initiation point is connected with the blast hole positioned on one side of the initiation point through a section of transverse delay detonator 5, and the initiation point is connected with the blast hole positioned on the other side of the initiation point through a section of transverse delay detonator 6; the rest blast holes which are arranged transversely are connected in series through three sections of transverse delay detonators 7. The first-stage longitudinal delay detonator, the first-stage transverse delay detonator, the second-stage longitudinal delay detonator and the second-stage transverse delay detonator are distributed in a cross shape by taking the initiation point as the center. The delay time of the first-stage transverse delay detonator is 0-20 ms, the delay time of the second-stage transverse delay detonator is 30-50 ms, the delay time of the first-stage longitudinal delay detonator is 20-30 ms, and the delay time of the second-stage longitudinal delay detonator is 50-75 ms. The three-section transverse delay detonator uses a common transverse delay detonator, and the second sections of the delay detonators in four directions connected with the initiation point are not repeated, so that hole-by-hole initiation can be realized.
The blast holes are filled with explosives, and are connected with delay detonators among the blast holes through delay detonating detonators in the holes. For example, the method is used for connecting a three-section transverse delay detonator, or is used for respectively connecting a one-section longitudinal delay detonator and a three-section transverse delay detonator, or is used for respectively connecting a two-section longitudinal delay detonator and a three-section transverse delay detonator, or is used for respectively connecting a one-section transverse delay detonator and a three-section transverse delay detonator, or is used for respectively connecting a two-section transverse delay detonator and a three-section transverse delay detonator. The delay time of the delay detonating cap in the hole is 200-1000 ms.
In the detonation network, blast holes are arranged in a rectangular array hole arrangement mode according to the mine design and the field actual requirements and the shape of a designed access ditch, and the depth of the blast holes is gradually increased row by row according to the gradient of the designed access ditch. The explosive is filled in the blast hole, the unit consumption of the explosive needs to be properly improved, and the shallower the depth of the blast hole is, the higher the unit consumption of the explosive is. The explosive is connected with the detonating network through the detonating detonator in the hole, receives the detonating signal and finally detonates.
When in detonation, the detonation detonator is used for igniting, and a detonation signal is transmitted, wherein the direction indicated by an arrow in figure 1 is the detonation transmission direction. The detonating line can be correspondingly adjusted according to the area size of the detonation zone and the number of blast holes. The delay time of the delay detonator in the hole is far longer than that of the delay detonator on the earth surface, so that the blast hole blasting is delayed from the transfer of the detonating signal, the time of the transfer of the earth surface signal is fully reserved, and the risk of detonating interruption is reduced. In the process of detonation, the central blast hole is detonated first to create a free surface for the adjacent blast holes, and after the adjacent blast holes are detonated, one to two free surfaces are created for the subsequent adjacent blast holes.
Examples
Setting a blast hole matrix with 5 rows and 13 columns, setting a detonating point in a blast hole at the center of the blast hole matrix, wherein the delay time of a first-section transverse delay detonator is 17ms, the delay time of a second-section transverse delay detonator is 42ms, the delay time of a first-section longitudinal delay detonator is 25ms, the delay time of a second-section longitudinal delay detonator is 65ms, and the delay time of a third-section transverse delay detonator is 9 ms. When the detonator is detonated, the detonator is ignited, and a detonating signal is transmitted, as indicated by an arrow in fig. 4.
The details of the present invention are not described in detail, but are known to those skilled in the art. Such as aperture, depth, pitch and space, single-hole charge, explosive type, detonating equipment type, ignition mode, etc.
As described above, the embodiment of the present invention has been described in detail, and it is obvious that the present invention is entirely included in the scope of protection of the present invention as long as the present invention does not substantially depart from the points and effects of the present invention and modifications thereof which are obvious to those skilled in the art. Obvious variations include changes in the delay duration of the delay detonator; change of detonator type; the change of the relative position of the blast holes, the change of the shape of other detonating circuits caused by the change, and the like.
Claims (9)
1. A hole-by-hole initiation network for trenching blasting, the initiation network comprising: the blast holes are arranged in an explosion area in a rectangular array mode, a detonating point is arranged in the blast hole positioned in the center of the array, the detonating point is connected with the blast hole positioned right above the detonating point through a section of longitudinal delay detonator, the detonating point is connected with the blast hole positioned right below the detonating point through a section of longitudinal delay detonator, the detonating point is connected with the blast hole positioned on one side of the detonating point through a section of transverse delay detonator, and the detonating point is connected with the blast hole positioned on the other side of the detonating point through a section of transverse delay detonator; the rest blast holes which are arranged transversely are connected in series through three sections of transverse delay detonators.
2. The detonating circuit of claim 1, wherein the primary longitudinal delay detonator, the primary transverse delay detonator, the secondary longitudinal delay detonator, and the secondary transverse delay detonator are distributed in a cross shape with the initiation point as the center.
3. The detonating circuit of claim 1, wherein said initiation point is provided with a detonating primer.
4. The detonating circuit of claim 1, wherein the blastholes are filled with explosives and are connected to delay detonators between blastholes by means of in-hole delay detonating detonators.
5. The detonating circuit of claim 1, wherein the delay time of said one-stage transverse delay detonator is 0-20 ms.
6. The detonating circuit of claim 1, wherein the delay time of said two-stage transverse delay detonator is 30-50 ms.
7. The detonating circuit of claim 1, wherein the delay time of said one-stage longitudinal delay detonator is 20-30 ms.
8. The detonating circuit of claim 1, wherein the delay time of said two-stage longitudinal delay detonator is 50-75 ms.
9. The detonating circuit of claim 4, wherein the delay time of said in-hole delay detonator is 200-1000 ms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922307608.XU CN211552623U (en) | 2019-12-20 | 2019-12-20 | Hole-by-hole detonating network for trenching blasting |
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| CN201922307608.XU CN211552623U (en) | 2019-12-20 | 2019-12-20 | Hole-by-hole detonating network for trenching blasting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654424A (en) * | 2021-09-02 | 2021-11-16 | 攀钢集团矿业有限公司 | New horizontal ditching method for deep open pit mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654424A (en) * | 2021-09-02 | 2021-11-16 | 攀钢集团矿业有限公司 | New horizontal ditching method for deep open pit mine |
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