CN107367204A - Gneiss terrains circular reservoir photoface exploision and rock burst substep release method - Google Patents
Gneiss terrains circular reservoir photoface exploision and rock burst substep release method Download PDFInfo
- Publication number
- CN107367204A CN107367204A CN201710615467.0A CN201710615467A CN107367204A CN 107367204 A CN107367204 A CN 107367204A CN 201710615467 A CN201710615467 A CN 201710615467A CN 107367204 A CN107367204 A CN 107367204A
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- hole
- blast
- photoface exploision
- face
- blast hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- 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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention relates to a kind of gneiss terrains circular reservoir photoface exploision and rock burst substep release method.The purpose of the present invention is intended to solve the photoface exploision control in buried gneiss tunnel (tunnel, tunnel) tunneling process and Rockburst Problem.The technical scheme of type of the present invention is：On the excavation face of circular reservoir, face immediate vicinity be drilled with some blast holes, blast hole is distributed in using face center as on the circle of origin and on origin, blast hole hole depth 7m, full depth scope powder charge；On the excavation face of circular reservoir some photoface exploision control holes are drilled with close to its boundary, photoface exploision control hole is uniformly distributed in using face center as on the circle of origin, photoface exploision control hole hole depth 10m, the powder charge at 0~1m of face, 2~3m, 4~5m and 6~7m in photoface exploision control hole, powder charge segment length is 1m, burst strength 0.04kg/T.The present invention is applied to the underground engineerings such as Hydraulic and Hydro-Power Engineering, traffic, mine.
Description
Technical field
The present invention relates to a kind of gneiss terrains circular reservoir photoface exploision and rock burst substep release method.Suitable for water conservancy water
The underground engineerings such as electrical engineering, traffic, mine.
Background technology
Rock burst is country rock caused by the potential energy accumulated in rock mass or the unexpected release of strain energy during Underground Engineering Excavation
Destroy, casualties, working face or equipment can be caused to destroy, its fundamental characteristics is unexpected and violent.And photoface exploision cares for
Name Si Yi is exactly that construction is strict with and controlled to blasting method, makes the chamber after explosion avoid excavation face from rising and falling as far as possible,
To increase later stage work amount.Especially gneiss rock mass piece rationality in itself and construction quality, cost impact, it is sometimes desirable to simultaneously
With respect to the two aspects, the especially gneiss terrains of circular reservoir, easily by blast disturbance, on the one hand cause rock burst, separately
On the one hand the gneiss sheet after explosion can be made to come off, causes to cave in, excavate facial disfigurement, had a strong impact on or even destroy engineering, together
When also increase the cost in later stage.When this gneiss rock burst occurs, vibrations are strong, and duration length, damage envelope is big, turns into
Control the key factor of engineering construction safety, driving progress or even success or failure.
The content of the invention
The technical problem to be solved in the present invention is：For above-mentioned problem, there is provided a kind of safe and reliable, cost compared with
The gneiss terrains circular reservoir photoface exploision low, construction speed is fast and rock burst substep release method, to solve buried gneiss tunnel
Photoface exploision control and Rockburst Problem in hole (tunnel, tunnel) tunneling process.
The technical solution adopted in the present invention is：A kind of photoface exploision of gneiss terrains circular reservoir and rock burst substep releasing side
Method, it is characterised in that：
On the excavation face of circular reservoir, face immediate vicinity be drilled with some blast holes, blast hole be distributed in
Face center for origin circle on and origin on, blast hole hole depth 7m, full depth scope powder charge；
On the excavation face of circular reservoir some photoface exploision control holes, photoface exploision are drilled with close to its boundary
Control hole is uniformly distributed in using face center as on the circle of origin, photoface exploision control hole hole depth 10m, photoface exploision control hole
The interior powder charge at 0~1m of face, 2~3m, 4~5m and 6~7m, powder charge segment length is 1m, burst strength 0.04kg/
T。
The blast hole has 7 and is divided into blast hole mesopore, blast hole lower opening in upper hole and blast hole；
Wherein blast hole mesopore has 3, including a blast hole positioned at face center, and 2 quick-fried with face center
Holes is located at the blast hole in same horizontal line, and blast hole mesopore is horizontally disposed；
Upper hole has 2 in the blast hole, is distributed in above blast hole mesopore, and upper hole position is in same water in 2 blast holes
On horizontal line, upper hole points to chamber center and tilts down 2~3 degree in blast hole；
Lower opening has 2 in the blast hole, is distributed in below blast hole mesopore, and lower opening is located at same water in 2 blast holes
On horizontal line, lower opening is pointed to chamber center and is inclined upwardly 2~3 degree in blast hole.
The photoface exploision control hole distance excavates the border 0.3m of face.
The photoface exploision control hole has 8.
The firing order of the blast hole and photoface exploision control hole is as follows：
Detonate three blast hole mesopores first, is spaced upper hole in two blast holes that followed by detonate for 5 seconds, after being spaced 10 seconds so
Lower opening in two blast holes of detonation afterwards, detonate photoface exploision control hole after 5 seconds at interval；The photoface exploision control hole is from inside to outside
Explosion is carried out paragraph by paragraph, is spaced 0.5 second.
The beneficial effects of the invention are as follows：The present invention arranges blast hole, using blasting method change rock mass in area of stress concentration
Character realizes the effect for eliminating or reducing energy accumulation degree, reaches rockburst control in a manner of eliminating or reduce rock burst power source
Purpose；The position of reasonable Arrangement photoface exploision control hole of the present invention and the position of explosive, firing order etc., are reduced to the steady of country rock
It is qualitative to cause to disturb.
Brief description of the drawings
Fig. 1 is the horizontal layout schematic diagram of embodiment.
Fig. 2 is Fig. 1 A-A sectional views.
Fig. 3 is Fig. 2 B-B sectional views.
Embodiment
As shown in FIG. 1 to 3, the present embodiment is a kind of gneiss terrains circular reservoir photoface exploision and rock burst substep releasing side
Method, some blast holes and photoface exploision control hole 5 are drilled with the excavation face 8 of circular reservoir 1, wherein blast hole is arranged in
In area of stress concentration, hole depth is to reach or through area of stress concentration as principle；Photoface exploision control hole 5 arranges purpose not disturb
Country rock is principle.Blast hole and photoface exploision control number of perforations, pore size and explosive payload are at utmost to weaken rock mass, same
When to damage rock mass not too much to cause the increase of support work amount be principle, while need to consider potential rock burst intensity and live supporting
Validity.
Excavating has seven blast holes on face 8, blast hole hole depth 7m, positioned at the immediate vicinity for excavating face, divides
It is distributed in excavate face center as on the circle of origin and on origin, full depth scope powder charge.Blast hole is divided into blast hole
Lower opening 4 in hole 3 and blast hole is gone up in hole 2, blast hole：Wherein blast hole mesopore has 3, including positioned at the quick-fried of the center of face 8
Holes, and 2 blast holes being located at face center blast hole in same horizontal line, blast hole mesopore are horizontally disposed；It is quick-fried
Upper hole has 2 in holes, is distributed in above blast hole mesopore, and upper hole position is in same horizontal line in 2 blast holes, in blast hole
It is 2~3 degree that upper hole inclination angle 6 in the blast hole that chamber center tilts down is pointed in upper hole；Lower opening has 2 in blast hole, is distributed in
Below blast hole mesopore, lower opening is located in same horizontal line in 2 blast holes, and lower opening points to chamber center to updip in blast hole
Lower opening inclination angle 7 is 2~3 degree in oblique blast hole.
Photoface exploision control hole 5 has eight in the present embodiment, is drilled with the excavation face 8 of circular reservoir close to its side
At boundary, and photoface exploision control hole is uniformly distributed in using face center as on the circle of origin, distance excavates the border of face
0.3m or so.Photoface exploision control hole hole depth is 10m, and distance is excavated face and risen at 0~1m, 2~3m, 4~5m and 6~7m
Powder charge, powder charge segment length are 1m, burst strength can be considered by 0.04kg/T, and digitized representation blast charging amount is with releasing model
Enclose interior rock mass weight ratio, the influence of explosive type first can not be considered during design.
The blasting sequence of the present embodiment is as follows：Detonated three blast hole mesopores 2 first, and interval is followed by detonated two for 5 seconds
Upper hole 3 in blast hole, interval is after 10 seconds, and lower opening 4 in two blast holes that then detonate, interval is after 5 seconds, and finally can just detonate smooth surface
Blasting Control hole 5.Photoface exploision control hole then needs from the inside to the outside, to carry out explosion successively, is spaced 0.5 second, i.e., ignite first away from
From explosive at 6~7m of face, then explosive at 4~6m is ignited, then ignite explosive at 2~3m, finally ignited and fried at 0~1m
Medicine.After the completion of explosion, slag tap, the excavation until completing chamber.
Claims (5)
1. a kind of gneiss terrains circular reservoir photoface exploision and rock burst substep release method, it is characterised in that：
On the excavation face (8) of circular reservoir (1), face immediate vicinity be drilled with some blast holes, blast hole is distributed in
Using face center as on the circle of origin and on origin, blast hole hole depth 7m, full depth scope powder charge；
On the excavation face (8) of circular reservoir (1) some photoface exploision control holes (5), light are drilled with close to its boundary
Face Blasting Control hole is uniformly distributed in using face center as on the circle of origin, photoface exploision control hole hole depth 10m, photoface exploision
0~1m, 2~3m, powder charge at 4~5m and 6~7m are played apart from face (8) in control hole, and powder charge segment length is 1m, burst strength
For 0.04kg/T.
2. circular reservoir photoface exploision in gneiss terrains according to claim 1 and rock burst substep release method, its feature exist
In：The blast hole has 7 and is divided into blast hole mesopore (2), blast hole lower opening (4) in upper hole (3) and blast hole；
Wherein blast hole mesopore (2) has 3, including the blast hole positioned at face (8) center, and 2 and face center
Blast hole is located at the blast hole in same horizontal line, and blast hole mesopore is horizontally disposed；
Upper hole (3) have 2 in the blast hole, are distributed in above blast hole mesopore, and upper hole position is in same level in 2 blast holes
On line, upper hole points to chamber center and tilts down 2~3 degree in blast hole；
Lower opening (4) has 2 in the blast hole, is distributed in below blast hole mesopore, and lower opening is located at same level in 2 blast holes
On line, lower opening is pointed to chamber center and is inclined upwardly 2~3 degree in blast hole.
3. circular reservoir photoface exploision in gneiss terrains according to claim 1 or 2 and rock burst substep release method, its feature
It is：Photoface exploision control hole (5) distance excavates the border 0.3m of face.
4. circular reservoir photoface exploision in gneiss terrains according to claim 3 and rock burst substep release method, its feature exist
In：The photoface exploision control hole (5) has 8.
5. circular reservoir photoface exploision in gneiss terrains according to claim 4 and rock burst substep release method, its feature exist
In：The firing order of the blast hole and photoface exploision control hole (5) is as follows：
Three blast hole mesopores (2) of detonation first, it is spaced in two blast holes that followed by detonate for 5 seconds upper hole (3), interval is after 10 seconds
Lower opening (4) in two blast holes of detonation, detonate photoface exploision control hole (5) after 5 seconds at interval；The photoface exploision control hole (5)
Carry out explosion paragraph by paragraph from inside to outside, be spaced 0.5 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710615467.0A CN107367204B (en) | 2017-07-26 | 2017-07-26 | Gneiss terrains circular reservoir photoface exploision and rock burst substep release method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710615467.0A CN107367204B (en) | 2017-07-26 | 2017-07-26 | Gneiss terrains circular reservoir photoface exploision and rock burst substep release method |
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| Publication Number | Publication Date |
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| CN107367204A true CN107367204A (en) | 2017-11-21 |
| CN107367204B CN107367204B (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710615467.0A Active CN107367204B (en) | 2017-07-26 | 2017-07-26 | Gneiss terrains circular reservoir photoface exploision and rock burst substep release method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001608A (en) * | 2021-10-20 | 2022-02-01 | 中铁三局集团第二工程有限公司 | Central ditch blasting excavation method for tunnel without inverted arch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560557A (en) * | 2004-03-10 | 2005-01-05 | 马芹永 | Technology method of artificial frozen soil control blasting by deep surface forzen method |
| CN102305580A (en) * | 2011-09-01 | 2012-01-04 | 北京交通大学 | Method for implementing full-face smooth blasting construction by using digital detonators |
| CN102401616A (en) * | 2011-10-11 | 2012-04-04 | 中国矿业大学(北京) | Blasting excavation method of vertical shaft |
| CN102445117A (en) * | 2011-12-06 | 2012-05-09 | 兰州大学 | V-notch blasting and smooth blasting combination control blasting procedure |
| CN104457465A (en) * | 2014-11-26 | 2015-03-25 | 武汉大学 | Deep-buried tunnel blasting excavation effect control method |
| CN104482815A (en) * | 2014-11-28 | 2015-04-01 | 中铁二十三局集团有限公司 | Tunnel smooth blasting method |
-
2017
- 2017-07-26 CN CN201710615467.0A patent/CN107367204B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560557A (en) * | 2004-03-10 | 2005-01-05 | 马芹永 | Technology method of artificial frozen soil control blasting by deep surface forzen method |
| CN102305580A (en) * | 2011-09-01 | 2012-01-04 | 北京交通大学 | Method for implementing full-face smooth blasting construction by using digital detonators |
| CN102401616A (en) * | 2011-10-11 | 2012-04-04 | 中国矿业大学(北京) | Blasting excavation method of vertical shaft |
| CN102445117A (en) * | 2011-12-06 | 2012-05-09 | 兰州大学 | V-notch blasting and smooth blasting combination control blasting procedure |
| CN104457465A (en) * | 2014-11-26 | 2015-03-25 | 武汉大学 | Deep-buried tunnel blasting excavation effect control method |
| CN104482815A (en) * | 2014-11-28 | 2015-04-01 | 中铁二十三局集团有限公司 | Tunnel smooth blasting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001608A (en) * | 2021-10-20 | 2022-02-01 | 中铁三局集团第二工程有限公司 | Central ditch blasting excavation method for tunnel without inverted arch |
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| CN107367204B (en) | 2019-03-05 |
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