CN110530220A - A kind of blasting technology for reservoir dam - Google Patents
A kind of blasting technology for reservoir dam Download PDFInfo
- Publication number
- CN110530220A CN110530220A CN201910871411.0A CN201910871411A CN110530220A CN 110530220 A CN110530220 A CN 110530220A CN 201910871411 A CN201910871411 A CN 201910871411A CN 110530220 A CN110530220 A CN 110530220A
- Authority
- CN
- China
- Prior art keywords
- hole
- blasting
- reservoir dam
- temporary plug
- blasting technology
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of blasting technologies for reservoir dam, comprising the following steps: S1 excavates the diversion tunnel for the permanent blockage that one end conducting is external, one end extends to drainpipe；S2, demolition blasting permanent blockage；S3, demolition blasting temporary plug.Blasting technology in the present invention can effectively form the diversion tunnel of a communicated drainage pipe, effectively improve drainage efficiency, accelerate reservoir and be vented speed, advantageously ensure that the progress of duration.
Description
Technical field
A kind of engineering explosion technical field of the present invention, and in particular to blasting technology for reservoir dam.
Background technique
Explosion is common a kind of construction means in mining industry construction or civil engineering.It needs to process explosion in construction area
Hole, the native lycopod of addition explosive progress is dynamic in blast hole or rock is scraped.Reservoir dam will appear leakage as time goes by and ask
Topic, when leakage increases to a certain extent, it may be desirable to reservoir is vented to carry out comprehensive, thorough seepage treatment to dam.But
Be under partial picture, the proper drainage system of reservoir cannot within the desired time complete unwatering inventory's water, influence the duration.It examines
Consider part reservoir dam and the construction period is provided with drainpipe, but drainpipe passes through armored concrete knot after dam is built up
The temporary plug and permanent blockage of structure block, and the present invention provides a kind of leading for communicated drainage pipe of constructing out on reservoir dam
Flow the blasting technology in hole.
Summary of the invention
A kind of technical solution that the present invention uses is:
A kind of blasting technology for reservoir dam, comprising the following steps:
S1 excavates the diversion tunnel for the permanent blockage that one end conducting is external, one end extends to drainpipe；
S2, demolition blasting permanent blockage；
S3, demolition blasting temporary plug.
Preferably, base tunnel is first tunneled in S3, then global blowup removes the temporary plug.
Preferably, S3 the following steps are included:
A development blasting by the way of V-cut on the outer end face of the temporary plug goes out the base tunnel；
Blasthole, temporary plug described in demolition blasting is arranged in b on the outer end face of the temporary plug.
Preferably, the cross section of the base tunnel is less than the face area of the temporary plug, the length of the temporary plug
For L, the length of interval of the base tunnel is [0.6L, 0.75L], is tunneled using horizontal multistage wedge shot.
Preferably, development blasting, each Excavation Length are 2m to the base tunnel several times, when driving surplus is less than 2m, pick
It is surplus into length.
Preferably, the cross-sectional area ratio of the cross section of the base tunnel and the temporary plug is 0.2-0.25.
Preferably, the blasthole is drilled using hand air drill, and the blasthole diameter is set as 42mm.
Preferably, the blasthole includes via hole, periphery hole and blast hole, wherein the blast hole is located at intermediate region,
The via hole and the periphery hole are arranged around the blast hole.
Preferably, the linear charging density of the blast hole, the via hole and the periphery hole is respectively 1kg/m, 1kg/m
And 0.5kg/m.
Preferably, each blast hole respectively arranges that hair MS1~MS10 millisecond time-delay is led in the position of hole depth 1/3,2/3
Booster detonator, in outside hole by detonator cluster articulation, using two MS1 sections of Nonel detonator propagation of explosions of hair at cluster interlink point, each branch again into
Row cluster connection is formed using two MS1 section Nonel detonator propagation of explosions of hair and is sent out instant electric detonator concatenated using two behind compound circuit and excite
The Nonel detonator of propagation of explosion extends to the safe initiation point initiation outside water conservancy diversion hole outlet by 500m propagation of explosion conducting wire.
The beneficial effects of the present invention are:
Blasting technology in the present invention can effectively form the diversion tunnel of a communicated drainage pipe, effectively improve draining effect
Rate accelerates reservoir and is vented speed, advantageously ensures that the progress of duration.
Specific embodiment
The present invention is a kind of blasting technology for reservoir dam, comprising the following steps:
S1 excavates the diversion tunnel for the permanent blockage that one end conducting is external, one end extends to drainpipe；
S2, demolition blasting permanent blockage；
S3, demolition blasting temporary plug.
The diversion tunnel that a communicated drainage pipe can be effectively formed in this way effectively improves drainage efficiency, accelerates reservoir and puts
Air speed degree advantageously ensures that the progress of duration.
In order to avoid being impacted to dam, in step S2 and S3, it is all made of and first tunnels out certain compensation space, then
Carry out the mode of demolition blasting.It is farther from reservoir since permanent blockage is located at the rear end of temporary plug, it can repeatedly explosion tear open
Remove, without too consider at its end facing water whether can onepull remove.And temporary plug needs to guarantee primary quick-fried due to nearly water
Forcible entry removes, and it is excessive otherwise to be mended quick-fried difficulty under water, therefore the explosion of temporary plug is required higher.
So being limited in detail in the present embodiment with the demolition blasting of temporary plug.
Preferably, base tunnel is first tunneled in S3, then global blowup removes temporary plug.Specifically, S3 the following steps are included:
A development blasting by the way of V-cut on the outer end face of temporary plug goes out base tunnel；
Blasthole, demolition blasting temporary plug is arranged in b on the outer end face of temporary plug.
The setting of the base tunnel increases the area for facing the sky scope of freedom, provides enough compensation spaces, V-cut clipping
Power is small, creates good condition for explosion.
Preferably, the cross section of base tunnel is less than the face area of temporary plug, and the length of temporary plug is L, the length of base tunnel
Spending section is [0.6L, 0.75L], is tunneled using horizontal multistage wedge shot.In actual mechanical process, base tunnel is quick-fried several times
Broken driving, each Excavation Length is 2m, and when tunneling surplus less than 2m, Excavation Length is surplus, for example Excavation Length is 5m,
Then it is divided into the 3 separate explosions driving of 2m, 2m and 1m.
And the cross section of base tunnel and the cross-sectional area ratio of temporary plug are 0.2-0.25.It opens up position and is located at interim block up
The middle position of the top and bottom of plug.
Blasthole is drilled using hand air drill, and blasthole diameter is set as 42mm.Blasthole is specifically divided into via hole, periphery hole and quick-fried
Holes, wherein blast hole is located at intermediate region, via hole and periphery hole and is arranged around blast hole.Blast hole on base tunnel inner face
There are three types of specifications, and one tilts down 20 °, hole depth 0.2L, secondly 45 °, hole depth 0.4L are tilted down, thirdly horizontally disposed, hole
Deep 0.1L.Also, upstream face of the blasthole apart from temporary plug at least 0.08L.Via hole, periphery hole and blast hole load fried
Medicine, the linear charging density of blast hole, via hole and periphery hole are respectively 1kg/m, 1kg/m and 0.5kg/m.And each blast hole
Respectively arrange hair MS1~MS10 millisecond time-delay Nonel detonator in the position of hole depth 1/3,2/3, in outside hole by detonator cluster articulation,
Using two MS1 sections of Nonel detonator propagation of explosions of hair at cluster interlink point, each branch carries out cluster connection again, using two MS1 sections of detonator thunders of hair
Pipe propagation of explosion forms behind compound circuit and send out concatenated instant electric detonator using two and excite the Nonel detonator of propagation of explosion, passed by 500m
Quick-fried conducting wire extends to the safe initiation point initiation outside water conservancy diversion hole outlet.
By wide 6m, high 6.6m, long 6m temporary plug for, base tunnel is designed as wide 3.5m, high 2.5m, depth 4.35m, and sets
It sets in the central area of temporary plug.Periphery hole is arranged 26, and is a circle evenly around base tunnel arrangement.Via hole, which is set to, leads
The upper area in hole, and in three layers of distribution in 6 holes, 7 holes, 7 holes.Blast hole is arranged 68, and is arranged at base tunnel inner face.Tool
Body include 10 horizontal wedge cutters, 28 lateral apertures, 20 angling holes for tilting down 20 °, 10 tilt down 45 °
Angling hole.Wherein 10 wedge cutters are distributed at two vertical column bilateral symmetries, and lateral aperture is evenly distributed on wedge cutter
Two sides, 20 ° of angling hole horizontal arrangements are in the lower section of lateral aperture and wedge cutter, and 45 ° of angling hole horizontal arrangements are in 20 ° of angling holes
Lower section.Wedge cutter bottom hole pitch 0.2m, aperture are away from 1.3m, remaining pitch-row 0.3m；Temporary plug surrounding via hole pitch-row 0.5
~0.8m；Periphery hole pitch-row 0.5m.The blasthole being arranged in this way, when being loaded, being ignited using explosive above-mentioned, can be safe,
It is one step completed to remove temporary plug completely, and dam and neighboring buildings will not be impacted simultaneously.
Above-mentioned blasting technology can effectively remove temporary plug, and temporary plug, which excavates base tunnel and increases, faces the sky scope of freedom
Area provides enough compensation spaces, and V-cut clipping power is small, creates good condition for explosion.And it rationally designs
The total footage of temporary plug excavation with guide pit, the reserved thickness for blocking end facing water, blasthole hole depth be to ensure that blocking do not destroyed by hydraulic pressure,
The key of sliding is not generated, can provide reliable guarantee for shotfiring safety operation.Use horizontal multistage wedge-shaped simultaneously and vertical wedge shape
Slotting technology is combined, can be interacted along two, axis opposite scope of freedom directions of blocking, vertical wedge cut is along blasthole axis
20 ° generate wedge with 45 ° of directions, exacerbate the destruction of temporary plug upstream face support shuttering and armored concrete blocking.
Above-described embodiment is preferred embodiment of the invention, and the present invention can also have other embodiments.The technology of this field
Personnel can also make equivalent deformation or replacement on the premise of without prejudice to spirit of the invention, these equivalent variation or replacement are wrapped
It is contained in range set by the claim of this application.
Claims (10)
1. a kind of blasting technology for reservoir dam, which comprises the following steps:
S1 excavates the diversion tunnel for the permanent blockage that one end conducting is external, one end extends to drainpipe；
S2, demolition blasting permanent blockage；
S3, demolition blasting temporary plug.
2. a kind of blasting technology for reservoir dam as described in claim 1, which is characterized in that first driving is led in S3
Hole, then global blowup remove the temporary plug.
3. a kind of blasting technology for reservoir dam as claimed in claim 2, which is characterized in that S3 the following steps are included:
A development blasting by the way of V-cut on the outer end face of the temporary plug goes out the base tunnel；
Blasthole, temporary plug described in demolition blasting is arranged in b on the outer end face of the temporary plug.
4. a kind of blasting technology for reservoir dam as claimed in claim 3, which is characterized in that the cross section of the base tunnel
Less than the face area of the temporary plug, the length of the temporary plug is L, the length of interval of the base tunnel be [0.6L,
0.75L], it is tunneled using horizontal multistage wedge shot.
5. a kind of blasting technology for reservoir dam as claimed in claim 4, which is characterized in that the base tunnel is quick-fried several times
Broken driving, each Excavation Length are 2m, and when tunneling surplus less than 2m, Excavation Length is surplus.
6. a kind of blasting technology for reservoir dam as claimed in claim 3, which is characterized in that the cross section of the base tunnel
Cross-sectional area ratio with the temporary plug is 0.2-0.25.
7. a kind of blasting technology for reservoir dam as claimed in claim 3, which is characterized in that the blasthole uses hand wind
Drilling, and the blasthole diameter is set as 42mm.
8. a kind of blasting technology for reservoir dam as claimed in claim 3, which is characterized in that the blasthole includes auxiliary
Hole, periphery hole and blast hole, wherein the blast hole is located at intermediate region, the via hole and the periphery hole around described quick-fried
Holes setting.
9. a kind of blasting technology for reservoir dam as claimed in claim 8, which is characterized in that the blast hole, described
The linear charging density of via hole and the periphery hole is respectively 1kg/m, 1kg/m and 0.5kg/m.
10. a kind of blasting technology for reservoir dam as claimed in claim 8, which is characterized in that each blast hole
Respectively arrange hair MS1~MS10 millisecond time-delay Nonel detonator in the position of hole depth 1/3,2/3, in outside hole by detonator cluster articulation,
Using two MS1 sections of Nonel detonator propagation of explosions of hair at cluster interlink point, each branch carries out cluster connection again, using two MS1 sections of detonator thunders of hair
Pipe propagation of explosion forms behind compound circuit and send out concatenated instant electric detonator using two and excite the Nonel detonator of propagation of explosion, passed by 500m
Quick-fried conducting wire extends to the safe initiation point initiation outside water conservancy diversion hole outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871411.0A CN110530220A (en) | 2019-09-16 | 2019-09-16 | A kind of blasting technology for reservoir dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871411.0A CN110530220A (en) | 2019-09-16 | 2019-09-16 | A kind of blasting technology for reservoir dam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110530220A true CN110530220A (en) | 2019-12-03 |
Family
ID=68668655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910871411.0A Pending CN110530220A (en) | 2019-09-16 | 2019-09-16 | A kind of blasting technology for reservoir dam |
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| CN (1) | CN110530220A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780638A (en) * | 2020-07-01 | 2020-10-16 | 中国水利水电第十六工程局有限公司 | Blasting demolition method for overflow dam section of old dam |
-
2019
- 2019-09-16 CN CN201910871411.0A patent/CN110530220A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| 蒋文斌等: "白云水电站大坝导流洞临时堵塞爆破", 《工程爆破》 * |
| 谭界雄等: "白云水电站混凝土面板堆石坝渗漏处理技术", 《人民长江》 * |
| 韩可林等: "导流隧洞封堵混凝土内放水洞爆破开挖控制技术", 《湖南水利水电》 * |
| 黄昌献等: "放空管可爆堵头技术在洞巴面板堆石坝的应用", 《红河水》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780638A (en) * | 2020-07-01 | 2020-10-16 | 中国水利水电第十六工程局有限公司 | Blasting demolition method for overflow dam section of old dam |
| CN111780638B (en) * | 2020-07-01 | 2023-07-21 | 中国水利水电第十六工程局有限公司 | Blasting demolition method for overflow dam segment of old dam |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191203 |
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| RJ01 | Rejection of invention patent application after publication |