CN101458055B - Once detonation subsection delaying blasting digging method - Google Patents
Once detonation subsection delaying blasting digging method Download PDFInfo
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- CN101458055B CN101458055B CN2008102387687A CN200810238768A CN101458055B CN 101458055 B CN101458055 B CN 101458055B CN 2008102387687 A CN2008102387687 A CN 2008102387687A CN 200810238768 A CN200810238768 A CN 200810238768A CN 101458055 B CN101458055 B CN 101458055B
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Abstract
The invention discloses a method which can realize multi-section continuous blasting and effectively reduce blasting vibration and is in particular applicable to large-section tunnel excavation. An excavation work surface is divided into two or more subsections which are sequentially staggered by a certain distance along the forwarding direction of the work surface. Total time delays of components formed by ignition detonators on the subsections are sequentially as follows: t1, t2..., tn; and step detonators with use time delays of T1, T2..., Tn sequentially ignite the ignition detonators on the subsections. The time delays satisfy the following relationships: T2 is greater than the sum of T1 and t1, T3 is grater than the sum of T2 and t2..., and Tn is greater than the sum of T (n-1) and t (n-1). Part of the detonators and detonator network thereof used for ignition are arranged at positions which can avoid the damage caused by previously ignited explosive and flying articles.
Description
Technical field
The present invention is under the jurisdiction of rock soil demolition and tunnel construction technology field.The present invention relates to the particularly once detonation subsection delaying blasting digging method of underground excavation project of a kind of ground excavation project, especially relate to a kind of method of suitable large cross-section tunnel Blasting Excavation.The present invention is specially adapted to the exclusive pledge excavation engineering of concussion of blasting.
Background technology
The prior art of this technical field can be consulted one Chinese patent application number: 200710139227.4 disclosed key names are the patented technology of " a kind of excavation method that is applicable to railway large-bore IV, V level surrounding rock tunnel ".
This patent of invention technology is specially a kind of excavation method that is applicable to railway large-bore IV, V level surrounding rock tunnel, comprises advance support, and excavation arc base tunnel is also reserved core soil; Step left and right sides abutment wall and reserve core soil in the staggered excavation; Interleavedly dig down step left and right sides abutment wall and reserve core soil; Excavate the upper, middle and lower step successively and reserve core soil; The excavation inverted arch is also executed steps such as doing preliminary bracing.This patented technology has solved the existing tunnel excavation method preferably and has had that working space is narrow and small, work efficiency is low; Construction method is dumb, progress is unstable; Yielding and the problem such as operation inconvenience etc. of country rock; But do not relate to the innovation of blasting technique, be not suitable for the excavation of I, II, III level surrounding rock tunnel yet.
Summary of the invention
The purpose of this invention is to provide a kind of Geotechnical Engineering, underground engineering of being suitable for; The blasting digging method of large cross-section tunnel engineering particularly; Especially provide a kind of and in digging process, can realize multibreak continuous demolition, and effectively reduce the excavation method of concussion of blasting.
1. the invention is characterized in, comprise step:
1) a bigger driving face is divided into more than two or two divides section, each minute, section was along the driving face direction of advance certain distance that staggers successively;
2) Drilling big gun hole on each minute section respectively, filling explosive and detonator delay detonator in the big gun hole;
3) Nonel detonator with (comprise in the hole with hole outside) on minute section is a unit.Total defer time of each unit Nonel detonator is followed successively by t according to driving direction of advance order from inside to outside
1, t
2..., t
n(n>=2);
4) Nonel detonator on each unit is connect, and use branch's detonator successively according to the driving direction of advance order from inside to outside Nonel detonator on each unit that detonates.Detonate and be seated in the explosive in the big gun hole by being arranged in Nonel detonator in the big gun hole.
5) defer time of branch's detonator is followed successively by T
1, T
2..., T
n, it is characterized in that the satisfied T that concerns
2＞T
1+ t
1, T
3＞T
2+ t
2..., T
n＞T
N-1+ t
N-1
2. the present invention's above-mentioned 1 described branch detonator is a delay electric detonator, connects into electric blasting circuit through lead, it is characterized in that adopting once electrification mode of excitation detonation subsection electric cap, again by branch's electric cap Nonel detonator on each unit that detonates respectively.
3. the present invention's above-mentioned 1 described branch detonator is the extension Nonel detonator, and connects into the detonator blasting circuit, it is characterized in that adopting mode of excitation detonation subsection detonator one time, again by branch's detonator Nonel detonator on each unit that detonates respectively.
4. the present invention's above-mentioned 2 or 3 described branch detonators, the detonator networking that it is characterized in that branch's detonator and undertake the unit that detonates are arranged in the position that the explosive that can avoid being detonated in advance and flying damage.
5. the present invention's above-mentioned 4 described branch detonators, the detonator networking that it is characterized in that branch's detonator and undertake the unit that detonates are pressed close to each unit respectively and are undertaken the branch section that detonates and arrange.
6. above-mentioned 5 described minutes sections of the present invention is characterized in that each minute section is vertical or be approximately perpendicular to the direction of advance of tunnel piercing, and each minute section the bottom on same horizontal plane.
7. the present invention's above-mentioned 5 or 6 described branch detonators, the defer time T of the branch's detonator that it is characterized in that detonating at first
1=0.
Can find out that by technique scheme provided by the invention the present invention is divided into driving face more than two or two and divides section, divide section along the driving face direction of advance certain distance that staggers successively.To divide the vibrations that explosion produces on the section to separate effectively through branch's detonator.Because branch's detonator can be selected the long second delay detonator of defer time, the section of the ms postpone Nonel detonator that therefore on minute section, uses is not, hop count and total defer time etc. are unaffected each other.So just two problems in the large cross-section tunnel Blasting Excavation process have been solved preferably.The one, solved the problem that large cross-section tunnel blast working Nonel detonator hop count can not meet the demands; The 2nd, solved the tunnel and divided section (the branch section of particularly separating) construction can not implement bursting work, the problem that efficiency of construction is low simultaneously with left and right sides mode.The solution of these two problems can reduce concussion of blasting on the one hand effectively, can also guarantee the efficiency of construction and the progress of engineering on the other hand.Therefore, the present invention is particularly suitable for large cross-section tunnel and passes through to the area of concussion of blasting sensitivity with to the concussion of blasting restriction Blasting Excavation in the location of strictness comparatively.
Description of drawings
Fig. 1～Fig. 4 is the bursting work sketch map of one embodiment of the present invention.
Fig. 1 is the layout sketch map of tunnel work face.Fig. 1 development end of representing to top bar is divided into 4 branch sections from inside to outside, and numbering is followed successively by 1,2,3,4.
Fig. 2 is the tunnel profile sketch map.Fig. 2 expresses the relation of 1,2,3,4 these 4 branch sections along the tunnel piercing direction of advance.
Fig. 3 is that sketch map is arranged in the big gun hole.Fig. 3 expresses the arrangement in big gun hole on 1,2,3,4 these 4 branch sections.Each (comprise and hole outside) Nonel detonator that divides on section is a unit in the hole in.
Fig. 4 is the connection sketch map of blasting network.Fig. 4 expresses the connected mode and the firing order of blasting network between 1,2,3,4 these 4 branch sections.10 expressions are detonated and are used electric cap.11,12,13,14 expression branch Nonel detonators.Electric cap 10 detonation subsection detonators 11,12,13,14.Detonate the successively respectively again Nonel detonator of each unit under the branch section 1,2,3,4 of branch's detonator 11,12,13,14.
The specific embodiment
Fig. 1 is the layout drawing in a large cross-section tunnel cross section, and the tunnel divides the up/down steps construction, and getting out of a predicament or an embarrassing situation lags behind tops bar.This embodiment only relates to the bursting work of topping bar.The section of will topping bar is divided into 1,2,3,4 totally 4 branch sections from front to back, wherein staggers successively between these 4 branch sections 2 meters (Fig. 2).Fig. 3 is that sketch map is arranged in the big gun hole of topping bar on 4 branch sections 1,2,3,4.Adopt CNS " Nonel detonator " (GB19417-2003) in the first serial ms postpone Nonel detonator.Divide wherein that totally 19 sections are other on the section 1, total defer time t of this unit detonator
1=1700 milliseconds.Totally 18 sections are other on the branch section 2, total defer time t of this unit detonator
2=1400 milliseconds.Divide and use the hop count of Nonel detonator to be 19 sections on the section 3,4, total defer time of corresponding units is respectively t
3=t
4=1700 milliseconds.Fig. 4 is the connection sketch map of blasting network between 1,2,3,4 these 4 branch sections.Wherein branch's detonator 11 is sent out Nonel detonator for wink, defer time T
1=0.Branch's detonator 12,13,14 is a second series second delay Nonel detonator, and wherein branch's detonator 12 is 4 sections second delay Nonel detonators, defer time T
2=3 seconds.Branch's detonator 13 is 7 sections second delay Nonel detonators, defer time T
3=6 seconds.Branch's detonator 14 is 10 sections second delay Nonel detonators, defer time T
4=9 seconds.The satisfied T that concerns of above-mentioned branch detonator delay time
2＞T
1+ t
1, T
3＞T
2+ t
2, T
4＞T
3+ t
3Before detonating, with branch's detonator 12,13,14 and undertake the detonator that excites and arrange near minute section 2,3,4 respectively.The purpose of arranging like this is in order to guarantee branch's detonator 12,13,14 and to undertake the explosive and the blast flying that the detonator networking that excites are not detonated in advance and damage.
11,12,13,14 bunches of couplet of branch's detonator are got up, excite with 1 instant electric detonator 10 and detonate.Branch's detonator 11 and the other millisecond delay cap of undertaking on the unit, branch section 1 place that excites of 16 sections thereof detonate at first in succession.Branch's detonator 12,13,14 and undertake the protection that the detonator networking that excites receives 2,3,4 sections respectively can not damaged by explosive and the blast flying that branch's detonator 11 detonates.
Elapsed time T
2After=3 seconds the time-delay, branch's detonator 12 and the other millisecond delay cap of undertaking on the branch section 2 that excites of 18 sections thereof detonate in succession.Branch's detonator 13,14 and undertake the protection that the detonator networking that excites receives branch section 3,4 respectively can not damaged by explosive and the blast flying that branch's detonator 12 detonates.
Elapsed time T
3After=6 seconds the time-delay, branch's Nonel detonator 13 and the other millisecond delay cap of undertaking on the branch section 3 that excites of 19 sections thereof detonate in succession.Branch's detonator 14 and undertake the protection that the detonator networking that excites receives branch section 4 can not damaged by explosive and the blast flying that branch's detonator 13 detonates.
Elapsed time T
4After=9 seconds the time-delay, branch's detonator 14 and the other millisecond delay cap of undertaking on the branch section 4 that excites of 19 sections thereof detonate in succession, and blasting process finishes.
The above; Be merely the preferable specific embodiment of the present invention, but protection scope of the present invention do not limit to therewith, any technical staff who is familiar with the present technique field is in technical scope of the present invention; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (6)
1. once detonation subsection delaying blasting digging method is characterized in that may further comprise the steps:
1) a bigger driving face is divided into more than two or two divides section, each minute, section was along the driving face direction of advance certain distance that staggers successively;
2) Drilling big gun hole on each minute section respectively, filling explosive and detonator delay detonator in the big gun hole;
3) be a unit with the Nonel detonator on minute section, total defer time of each unit Nonel detonator is followed successively by t according to driving direction of advance order from inside to outside
1, t
2..., t
n(n>=2);
4) Nonel detonator on each unit is connect, and use branch's detonator according to the driving direction of advance order from inside to outside Nonel detonator on each unit that detonates successively, being detonated by Nonel detonator is seated in the explosive in the big gun hole; Wherein, the defer time of branch's detonator is followed successively by T from inside to outside
1, T
2, T
3, T
n, and the satisfied T that concerns
2＞T
1+ t
1, T
3＞T
2+ t
2... T
n＞T
N-1+ t
N-1
2. once detonation subsection delaying blasting digging method according to claim 1; It is characterized in that said branch detonator is a delay electric detonator; Connect into electric explosion network through lead; Adopt the once electrification mode of excitation delay electric detonator that detonates, again by the delay electric detonator Nonel detonator on each unit that detonates respectively.
3. once detonation subsection delaying blasting digging method according to claim 1; It is characterized in that said branch detonator is the extension Nonel detonator; And connect into the detonator initiation net; Adopt mode of excitation extension Nonel detonator that detonates, again by the extension Nonel detonator Nonel detonator on each unit that detonates respectively.
4. according to claim 2 or 3 described once detonation subsection delaying blasting digging methods, it is characterized in that said branch detonator and initiation net are arranged in the position that the explosive that can avoid being detonated in advance and flying damage.
5. once detonation subsection delaying blasting digging method according to claim 4, the detonator networking that it is characterized in that said branch detonator and undertake the unit that detonates are pressed close to each unit respectively and are undertaken the branch section that detonates and arrange.
6. once detonation subsection delaying blasting digging method according to claim 1 is characterized in that the defer time T of the said branch's detonator that detonates at first
1=0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102387687A CN101458055B (en) | 2008-12-24 | 2008-12-24 | Once detonation subsection delaying blasting digging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102387687A CN101458055B (en) | 2008-12-24 | 2008-12-24 | Once detonation subsection delaying blasting digging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101458055A CN101458055A (en) | 2009-06-17 |
| CN101458055B true CN101458055B (en) | 2012-05-23 |
Family
ID=40769061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102387687A Expired - Fee Related CN101458055B (en) | 2008-12-24 | 2008-12-24 | Once detonation subsection delaying blasting digging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101458055B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813445A (en) * | 2009-08-21 | 2010-08-25 | 北京维深数码科技有限公司 | Blasting system and detonation time control method thereof |
| CN102042786B (en) * | 2010-11-12 | 2013-03-13 | 中铁十二局集团第二工程有限公司 | Controlled blasting construction method for shallow-buried large-section tunnel |
| CN102564249A (en) * | 2012-03-08 | 2012-07-11 | 刘国祥 | Controllable blasting network |
| CN103673798B (en) * | 2012-09-10 | 2017-06-13 | 北京铱钵隆芯科技有限责任公司 | Blasting cap initiation control method and device and initiator |
| CN103557758B (en) * | 2013-11-01 | 2015-08-05 | 中铁四局集团有限公司 | Associating time delay subregion millisecond detonating network inside and outside excavation region hole in Tunnel Blasting |
| CN103557756B (en) * | 2013-11-01 | 2015-08-05 | 中铁四局集团有限公司 | Pilot heading hole-specifically delayed ignition network in Tunnel Blasting |
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2008
- 2008-12-24 CN CN2008102387687A patent/CN101458055B/en not_active Expired - Fee Related
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| CN101458055A (en) | 2009-06-17 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: QINGDAO MUNICIPAL ENGINEERING GROUP CO., LTD. QING |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Hailiang Inventor after: Wang Zhifu Inventor after: Yin Zishan Inventor after: Gao Yuanfeng Inventor after: Chen Lianjun Inventor after: Liu Yin Inventor after: Gao Tongwei Inventor after: Zhao Changwei Inventor before: Wang Hailiang Inventor before: Chen Lianjun Inventor before: Liu Yin Inventor before: Gao Tongwei Inventor before: Zhao Changwei |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG HAILIANG CHEN LIANJUN LIU YIN GAO TONGWEI ZHAO CHANGWEI TO: WANG HAILIANG WANG ZHIFU YIN ZISHAN GAO YUANFENG CHEN LIANJUN LIU YIN GAO TONGWEI ZHAO CHANGWEI |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20110210 Address after: 266510 Shandong University of Science and Technology, Shandong, Qingdao, 579 Bay Road, economic and Technological Development Zone Applicant after: Shandong Univ. of Science & Technology Co-applicant after: Qingdao Municipal Engineering Group Co., Ltd. Co-applicant after: Qingdao Municipal Affair Construction Development Co., Ltd. Address before: 266510 Shandong University of Science and Technology, Shandong, Qingdao, 579 Bay Road, economic and Technological Development Zone Applicant before: Shandong Univ. of Science & Technology |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20121224 |