CN213748125U - Tunnel lower step big gun hole loaded constitution and tunnel lower step blasting structure - Google Patents
Tunnel lower step big gun hole loaded constitution and tunnel lower step blasting structure Download PDFInfo
- Publication number
- CN213748125U CN213748125U CN202022536825.9U CN202022536825U CN213748125U CN 213748125 U CN213748125 U CN 213748125U CN 202022536825 U CN202022536825 U CN 202022536825U CN 213748125 U CN213748125 U CN 213748125U
- Authority
- CN
- China
- Prior art keywords
- explosive
- layer
- lower step
- tunnel lower
- tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The utility model relates to a tunnel lower step big gun hole loaded constitution and tunnel lower step blasting structure belongs to engineering blasting technical field, it includes detonating tube, initiating explosive package and big gun hole that sets up on tunnel lower step, from bottom to top be equipped with first explosive layer, second explosive layer and jam layer in the big gun hole, all be equipped with the isolation layer between first explosive layer and the second explosive layer, between second explosive layer and the jam layer; the primary explosive is embedded in the first explosive layer, the primary explosive package comprises strip-packaged emulsion explosive and a detonator, the detonator is installed in the strip-packaged emulsion explosive, the detonator is connected with the detonating tube, and the other end of the detonating tube extends to the outside of the blast hole. The utility model discloses a charging structure can make the blasting object become the crack development body, does not produce the throwing, and because the shock attenuation effect that the sky face was faced to the upper ledge again to the while, it is less to the shield tunnel influence of another circuit, does benefit to safe construction.
Description
Technical Field
The utility model relates to an engineering blasting technical field especially relates to step big gun hole loaded constitution under tunnel and tunnel bench blasting structure under.
Background
With the increasing urban population and urban scale, subways have become important transportation and regional hub tools for large cities. In recent years, with the continuous development of subway lines, the overlapping of multi-line subways in different space areas becomes the technical difficulty and the key point of municipal engineering construction. Particularly, the technical difficulty of ultra-small clear distance construction between tunnels is more prominent in municipal engineering.
When the ultra-small clear distance construction is carried out between the tunnels and the blasting construction is carried out on the overlapped areas, how to ensure the safety of the shield tunnel is particularly important.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem and provide step big gun hole loaded constitution under tunnel and tunnel step blasting structure.
The utility model discloses a following technical scheme realizes:
the blast hole charging structure of the lower step of the tunnel comprises a detonating tube, an initiating explosive package and a blast hole arranged on the lower step of the tunnel, wherein a first explosive layer, a second explosive layer and a blocking layer are arranged in the blast hole from bottom to top, and isolation layers are arranged between the first explosive layer and the second explosive layer and between the second explosive layer and the blocking layer;
the primary explosive is embedded in the first explosive layer, the primary explosive package comprises strip-packaged emulsion explosive and a detonator, the detonator is installed in the strip-packaged emulsion explosive, the detonator is connected with the detonating tube, and the other end of the detonating tube extends to the outside of the blast hole.
Preferably, the first and second explosive layers are emulsion explosives.
Further, the second explosive layer is thicker than the first explosive layer.
Wherein the plugging layer comprises yellow mud, fine sand, coarse sand or wood dust.
Wherein, the isolation layer comprises a water bag or an interval air layer.
Preferably, the strip-packed emulsion explosive is a phi 32mm strip-packed emulsion explosive.
The tunnel lower step blasting structure is characterized in that a plurality of blast holes are formed in the tunnel lower step, and a non-electric detonating network is adopted, and electric detonators or exciting needles are used for detonating.
Preferably, 1-15-section differential detonating tube detonators of 5-15m are adopted, and holes are externally excited by the same-section millisecond electric detonators.
Preferably, a YJGN-500 type detonator is used for detonation.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a charging structure can make the blasting object become the crack development body, does not produce the throwing, and because the shock attenuation effect that the sky face was faced to the upper ledge again to the while, it is less to the shield tunnel influence of another circuit, does benefit to safe construction.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of a tunnel lower step blast hole charging structure.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
As shown in figure 1, the utility model discloses a step big gun hole loaded constitution under tunnel, including detonating tube 15, initiating explosive package 14 and set up the big gun hole 1 on the step under the tunnel, from up being equipped with first explosive layer 11, second explosive layer 12 and jam layer 13 down in the big gun hole 1. Isolation layers 16 are arranged between the first explosive layer 11 and the second explosive layer 12 and between the second explosive layer 12 and the plugging layer 13; the spacer 16 may comprise a water bag or an air space.
The initiating explosive package 14 is buried in the first explosive layer 11, the initiating explosive package 14 comprises strip-packed emulsion explosive and a detonator, the detonator is installed in the strip-packed emulsion explosive, the detonator is connected with a detonating tube 15, and the other end of the detonating tube 15 extends to the outside of the blast hole 1.
The strip-packed emulsion explosive with the diameter of 32mm is used as a main explosive and a primary explosive.
The blocking method of the blast hole 1 comprises the following steps: blocking the shallow hole with yellow mud or fine sand, and tamping; blastholes with accumulated water are blocked by coarse sand or wood chips.
The utility model discloses a step blasting structure under tunnel is equipped with a plurality of big gun holes 1 under the tunnel on the step, and the loaded constitution in the big gun hole 1 is as above. The non-electric (detonating tube detonator) detonating network is adopted, and the electric detonator or the exciting needle is used for detonating.
In the specific application, the tunnel upper step is excavated manually by mechanical cooperation, and the lower step is excavated by loosening blasting properly. The lower step adopts a differential blasting technology, and the blasting vibration speed is controlled within 2 cm/s. The time difference may be taken to be 100ms in consideration of the influence of the superposition of the blasting vibration waveform. Specifically, 1-15 sections of differential detonating tube detonators with the diameter of 5-15m can be adopted, a detonator is arranged in each blast hole, the holes are externally excited by the same-section millisecond electric detonators and are connected in series greatly, and then the parallel-series detonating network is formed. And adopting YJGN-500 type exploder for explosion. The number of detonators does not exceed 300 in each priming, and the detonating can be completely and safely carried out.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. Step big gun hole loaded constitution under tunnel, its characterized in that: the blasting hole is internally provided with a first explosive layer, a second explosive layer and a plugging layer from bottom to top, and isolation layers are arranged between the first explosive layer and the second explosive layer and between the second explosive layer and the plugging layer;
the primary explosive is embedded in the first explosive layer, the primary explosive package comprises strip-packaged emulsion explosive and a detonator, the detonator is installed in the strip-packaged emulsion explosive, the detonator is connected with the detonating tube, and the other end of the detonating tube extends to the outside of the blast hole.
2. The tunnel lower step blasthole charge structure of claim 1, characterized in that: the first explosive layer and the second explosive layer are emulsion explosives.
3. The underpass step blasthole charging configuration as claimed in claim 1 or 2, wherein: the second explosive layer is thicker than the first explosive layer.
4. The tunnel lower step blasthole charge structure of claim 1, characterized in that: the plugging layer is one of yellow mud, fine sand, coarse sand and wood dust.
5. The tunnel lower step blasthole charge structure of claim 1, characterized in that: the isolation layer comprises a water bag or an interval air layer.
6. The tunnel lower step blasthole charge structure of claim 1, characterized in that: the strip-packed emulsion explosive is a strip-packed emulsion explosive with the diameter of 32 mm.
7. Step blasting structure under tunnel, its characterized in that: the tunnel lower step blast hole charging structure comprises the tunnel lower step blast hole charging structure according to any one of claims 1 to 6, wherein a plurality of blast holes are formed in the tunnel lower step, and the blast holes are detonated by using a non-electric detonating network and an electric detonator or an exciting needle.
8. The tunnel lower step blasting structure according to claim 7, wherein: 1-15 sections of differential detonating tube detonators with the length of 5-15m are adopted, and the same-section millisecond electric detonators are used for exciting the holes.
9. The tunnel lower step blasting structure according to claim 7 or 8, wherein: and adopting YJGN-500 type exploder for explosion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022536825.9U CN213748125U (en) | 2020-11-05 | 2020-11-05 | Tunnel lower step big gun hole loaded constitution and tunnel lower step blasting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022536825.9U CN213748125U (en) | 2020-11-05 | 2020-11-05 | Tunnel lower step big gun hole loaded constitution and tunnel lower step blasting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213748125U true CN213748125U (en) | 2021-07-20 |
Family
ID=76820595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022536825.9U Active CN213748125U (en) | 2020-11-05 | 2020-11-05 | Tunnel lower step big gun hole loaded constitution and tunnel lower step blasting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213748125U (en) |
-
2020
- 2020-11-05 CN CN202022536825.9U patent/CN213748125U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103615941B (en) | The blasting method of modernized railway shallow-buried sector | |
| CN106091848B (en) | It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion | |
| CN113383206B (en) | Blasting method using jet unit charged in blast hole | |
| CN104819670B (en) | Pre-drilling mesopore shaft excavation blasting method | |
| CN110779403A (en) | Hole-by-hole initiation presplitting blasting crack forming method for open-air deep hole step presplitting hole under complex environment | |
| CN108007285A (en) | A kind of stone head deep hole sublevel is segmented efficient Cut Blasting method | |
| CN102914226A (en) | Hollow-hole rhombic parallel cut blasting damping method | |
| CN104482816B (en) | A kind of vertical periphery segment algorithm gradient presplit blasting method and device | |
| CN103398637B (en) | Mean-peak micro-quake fine control blasting construction method using high-precision digital electronic detonators | |
| CN104990471B (en) | Extremely short-range blasting construction vibration absorbing method and vibration absorbing and energy gathering lancing cartridge | |
| CN102967191A (en) | Blasting method for treatment of gob | |
| CN110671981A (en) | Smooth blasting method for vertical shaft tunneling in high stress environment | |
| CN106225613A (en) | A kind of efficient segmentation method of ignition in tunnel excavating process | |
| CN110260735A (en) | A kind of diamond shape major diameter emptying aperture burn cut structure and lane construction technique | |
| CN102305580A (en) | Method for implementing full-face smooth blasting construction by using digital detonators | |
| CN113587753A (en) | Axial non-coupling water spaced charging structure and smooth blasting method using same | |
| CN106767213A (en) | A kind of Roof Control blasting method of soft broken top board ore body back production | |
| CN106545344B (en) | A kind of Karst area tunnel wall-hanging country rock face blast excavation method | |
| CN111238329A (en) | Method for performing geometric forming blasting on semi-coal rock roadway by adopting instantaneous bursting device | |
| CN109372509A (en) | Arrangement method for double-hollow-hole rhombic cut holes in access filling mining | |
| CN103557756A (en) | Advanced adit hole-by-hole delayed blasting network in tunnel blasting | |
| CN213748125U (en) | Tunnel lower step big gun hole loaded constitution and tunnel lower step blasting structure | |
| CN113513954A (en) | Boundary control blasting method for underground mine deep hole stope | |
| CN110030889B (en) | Method for forming well by deep hole partition triangular net cut through one-time blasting | |
| CN210570276U (en) | Detonation explosion-proof tube for sectionally and alternately charging closed space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |