CN105021096B - A kind of five-part form millisecond electric detonator secondary blasting construction method applied in high methane large cross-section tunnel explosion - Google Patents
A kind of five-part form millisecond electric detonator secondary blasting construction method applied in high methane large cross-section tunnel explosion Download PDFInfo
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- CN105021096B CN105021096B CN201510427797.8A CN201510427797A CN105021096B CN 105021096 B CN105021096 B CN 105021096B CN 201510427797 A CN201510427797 A CN 201510427797A CN 105021096 B CN105021096 B CN 105021096B
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Abstract
The present invention is a kind of five-part form millisecond electric detonator secondary blasting construction method that can be applied to high methane large cross-section tunnel, it is tunnel passing through coal measure strata section, excavate and there are gas in the range of space or explosion, in the environment of coal dust, it is related to the selection of blast working electric cap, profile according to tunnel surrounding and excavated section carries out the design of borehole, wherein to snubber, inner ring reliever and outer ring reliever, periphery hole and base eye subregion are conducted batch-wise explosion, and millisecond delay electric detonator section is carried out according to explosion scope be not designed, continue to optimize practice analysis, this blasting construction method opens coal seam tunnel test mileage section is safe and smooth, realize high methane large cross-section tunnel fast and safely development blasting, there is preferable dissemination.
Description
Technical field
The present invention relates to the blasting technique under coal-bed gas environment, especially quick-fried under high methane large cross-section tunnel environment
Broken.
Background technology
At present, railway and highway quickly develop, and than increasing, Tunnel Passing coal measure strata gets more and more, gas tunnel in tunnel
Road blast working safety problem is more and more prominent.The commonly used high section of Tunnel Blasting not (15-19 section is other) detonator is ignited, and leads quick-fried
After pipe is excited, spray detonation ripple causes detonator, then ignition charge.
Because the structure design of the other detonator of high section and time length of delaying easily cause gas or coal-dust explosion, after measured in height
Gas density within 360ms after gas tunnel or mine borehole blasting typically not over 1%, between millisecond blasting adjacent segment
Interval time only has 25ms,《Safety regulations in coal mine》Regulation must use allowed for use in coal mines millisecond delay electric detonator, allowed for use in coal mines milli
The second delay electric detonator maximum lateness time is less than 130ms (only the 1/3 of 360ms)；In addition, when tunnel cross-section is larger, adopting
Benching tunnelling method to upper face blast, in strict accordance with《Safety regulations in coal mine》After carrying out onepull, demolition effect is undesirable, owes to dig sternly
Weight can be only achieved Expected Results it is often necessary to repeatedly mend big gun, and cycle period is long, has a strong impact on construction drilling depth and construction safety.This
Outward, detonator cannot detect quality of connection with instrument before detonating, when network segmentation is excessive, easily because air-shock wave destroys net simultaneously
Network and reduce serviceability, easily cause security incident.
How to realize the fast and safely explosion of high methane large cross-section tunnel, be to realize tunnel to realize safe construction and improve engineering
The premise of progress.
Content of the invention
It is an object of the invention to overcoming existing detonator detonating construction method to may not apply to biogas and coal dust ring
The deficiency in border, provides a kind of five-part form millisecond electric detonator secondary blasting construction party applied in high methane large cross-section tunnel explosion
Method, the method not only can be suitably used under biogas and coal dust environment, and can improve demolition effect and safety coefficient.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of five-part form millisecond electric detonator secondary blasting construction method applied in high methane large cross-section tunnel explosion, its
Feature is, comprises the steps：
(1) before blast working, work out corresponding explosion bulge test outline, after design approval, choose different mileage sections, enter
Row explosion bulge test, according to explosion bulge test result, adjusts blasting parameter, until obtaining optimal demolition effect, with the explosion after adjusting
Parameter is as the foundation of live Blasting Excavation；
(2) determine and dig contour line and borehole position；Described borehole includes snubber, base eye, outer reliever, interior reliever
And periphery hole；
(3) according to blasting parameter, blasthole drilling hole powder charge, line；Snubber uses 1 section of electric cap, and inner ring reliever makes
With 3 sections of electric caps, connect；Outer ring reliever uses 1 section of electric cap, and periphery hole uses 3 sections of electric caps, and base eye uses 5 sections of electricity
Detonator, series connection；
(4) first burn cut eye and and inner ring reliever, treat after explosion that gas density is less than 0.5%, slag tap after finishing,
Carry out secondary blasting outer ring reliever, periphery hole and base eye again.
Further, described blasting parameter includes depth, spacing, quantity and the single hole explosive payload of borehole；Concrete data is as follows
Shown in table,
Further, described reliever includes inner ring reliever and outer ring reliever, and described outer ring reliever is away from outline excavation
Line periphery 0.6m, described inner ring reliever is away from excavation contour line periphery 1.2m；Described adjacent outer ring reliever spacing is 0.6m,
Described adjacent inner ring reliever spacing is also 0.6m；
Further, described electric cap is allowed for use in coal mines millisecond delay electric detonator.
Compared with the prior art, the present invention has the beneficial effect that：
The present invention relates to a kind of five-part form millisecond electric detonator secondary blasting applied in high methane large cross-section tunnel explosion
Construction method, obtains tunnel borehole section arrangement and parameter by explosion bulge test；During explosion, initially with 1,3 sections of other millisecond electricity
Detonator series connection carry out first blasting snubber and and inner ring reliever, treat after big gun that gas density is less than 0.5%, slag tap after finishing,
Carry out secondary blasting outer ring reliever, periphery hole and base eye using 1,3,5 sections of other millisecond electric detonator series connection again；Construction period root
Continue to optimize practice according to demolition effect, constantly adjustment explosion design structure, reach the purpose being capable of rapid construction and safety in production.
Onepull maximum delay 110ms of the present invention, meets specification 130ms and requires, ensure construction safety；By secondary
Quick-fried solve the problems, such as that big cross section is conventional and repeatedly detonate, improve efficiency of construction, out break controls more than 95%.
Brief description
Fig. 1 is high methane tunnel cross-section explosion layout drawing；
Fig. 2 is charge constitution figure；
Fig. 3 is Excavation Blasting process chart；
In figure：Dimensional units are rice.
Below in conjunction with accompanying drawing, explanation is further explained to technical solution of the present invention by specific embodiment.
Specific embodiment
(1) explosion bulge test：Before blast working of the present invention, work out corresponding explosion bulge test outline, after design approval, choosing
Take different mileage sections, carry out explosion bulge test, according to explosion bulge test result, adjust blasting parameter, until obtaining optimal explosion effect
Really, the blasting parameter after to adjust is as the foundation of live Blasting Excavation；
(2) top layer scum silica frost cleaning：Before construction borehole, using excavator, to excavating, face carries out loosening rock or sillar enters
Row cleaning is it is ensured that construction environment safety.
(3) measure：Before boring, by e measurement technology personnel measurement face section size, Coordinate of central line (cross line position),
And live pre- explosion situation is supplied to technical staff and boring team.
(4) design：Technical staff, according to situ measurements, carries out explosion design, determines borehole position and quantity, and root
Fill in blasting parameter table (shown in table 1) according to explosion bulge test parameter, draw explosion layout drawing, after person in charge of the technology aspect's examination ＆ verification, tell somebody what one's real intentions are
To builder, boring team.
Table 1
(5) cloth hole：Builder tells somebody what one's real intentions are according to measurement, blasting parameter table, is drawn as borehole position using dipstick metering on face,
And have red paint to carry out labelling, then boring team is told somebody what one's real intentions are.
(6) hole：Boring team, according to borehole position on face, carries out bore operation.Boring team operator must be
There is an actuator of card, pre-job must carry out special training.During boring, rig operations handss are first according to device to hole of confiding a technological secret
Position is checked, and just can spud in, when spudding in, site operation person must put in place, and split hole position, bore angle etc. enter after confirmation is errorless
Row checks, just can spud in after confirmation is errorless.
(7) verify：, after the completion of boring, big gun bar and steel ruler using tape label check blasthole hole for builder and Quality Inspector
Whether the blasting parameters such as depth, pitch-row, array pitch, inclination angle are consistent with blasting parameter design table, and fill in relative recording；As not being inconsistent, return
Work perforations adding, until be consistent.After whole blast holes are qualified, explosion instruction is assigned by builder to demolition firing party.
(8) powder charge：Gas density in the range of watt live 20m of inspection person's detection before powder charge, after gas density is in safety range,
Will be clean for borehole hole purging；Design explosive payload is pressed by demolition firing party, charge constitution (Fig. 2 forward direction charge constitution) loads borehole, borehole 10
It is divided into powder charge section 101 and blocking section 102, powder charge section are filled with No. three explosives 103 of allowed for use in coal mines, blocking section is blocked by steeping mud 104,
No. three explosives of allowed for use in coal mines are drawn by the other detonator of different sections 105.
(9) block：After the completion of powder charge, blasthole is blocked according to design requirement by dynamiter, clogged using stemming, adopt
Big gun bar imports stemming.Periphery hole stemming stemming length is not less than 30cm.Other boreholes：It is not preferably less than borehole less than 1m stemming length
Depth 1/2；Depth 1～2.5m stemming length is not preferably less than 0.5m, and more than 2.5m, stemming length is not preferably less than 1m to depth, unnecessary
Firer's material to return in time.
(10) network：Demolition firing party dynamiter connects initiation net according to explosion design requirement, detonates first, snubber 1 makes
With 1 section of electric cap, inner ring reliever 2 is using 3 sections of electric caps series connection
(11) guard against：Blast warning area must be provided with clearly indicating；Blast warning personnel must wear caution notice (sleeve
Chapter, red flag, whistle)；After blast warning must have the alarm that can hear in whole security area, all of personnel equipment removes immediately
From security area.
(12) detonate：Before explosion, watt inspection person detects gas density in the range of live 20m again, determines gas density in safety
In the range of, explosion team leader confirming that every preparation finishes, personnel, equipment are withdrawn and put in place in security area, after the completion of warning, sends out
Detonate after going out order of detonating.
(13) quick-fried rear inspection：After detonating 30 minutes, by a watt inspection person, dynamiter and security official, enter blast area carry out quick-fried after
Check, send, after confirming blast area safety, signal of sounding all clear.
(14) release warning：After confirming burst region safety, send releasing outpost orders, warning personnel can release police
Guard against.
(15) repeat step (6)-(14), carry out secondary blasting operation, and secondary blasting is outer ring reliever 3, periphery hole 4 and
Base eye 5, outer ring reliever 3 uses 1 section of electric cap, and periphery hole 4 uses 3 sections of electric caps, and base eye 5 uses 5 sections of electric cap strings
Connection.
Claims (2)
1. a kind of five-part form millisecond electric detonator secondary blasting construction method applied in high methane large cross-section tunnel explosion, it is special
Levy and be, comprise the steps：
(1) before blast working, work out corresponding explosion bulge test outline, after design approval, choose different mileage sections, carry out quick-fried
Broken test, according to explosion bulge test result, adjusts blasting parameter, until obtaining optimal demolition effect, with the blasting parameter after adjusting
Foundation as live Blasting Excavation；
(2) determine and dig contour line and borehole position, described borehole includes snubber, base eye, outer reliever, interior reliever and week
Side eye；
(3) according to blasting parameter, blasthole drilling hole powder charge line；Snubber uses 1 section of electric cap, and inner ring reliever uses 3 sections
Electric cap, series connection；Outer ring reliever uses 1 section of electric cap, and periphery hole uses 3 sections of electric caps, and base eye uses 5 sections of electric caps,
Series connection；
(4) burn cut eye and inner ring reliever first, treats after explosion that gas density is less than 0.5%, slags tap after finishing, then carries out
Secondary blasting outer ring reliever, periphery hole and base eye；
Described blasting parameter includes depth, spacing, quantity and the single hole explosive payload of borehole；Concrete data is as shown in the table,
, away from excavation contour line periphery 0.6m, described inner ring reliever is away from excavation contour line periphery 1.2m for described outer ring reliever；
Described adjacent outer ring reliever spacing is 0.6m, and described adjacent inner ring reliever spacing is also 0.6m；
2. a kind of five-part form millisecond electric detonator two applied in high methane large cross-section tunnel explosion according to claim 1
Separate explosion construction method is it is characterised in that described electric cap is allowed for use in coal mines millisecond delay electric detonator.
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| CN201510427797.8A CN105021096B (en) | 2015-07-17 | 2015-07-17 | A kind of five-part form millisecond electric detonator secondary blasting construction method applied in high methane large cross-section tunnel explosion |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382868B (en) * | 2016-11-25 | 2019-01-04 | 中国矿业大学(北京) | A kind of high methane tunnel/tunnel electric cap serial ignition network on line method |
| CN110425008A (en) * | 2019-08-02 | 2019-11-08 | 精英数智科技股份有限公司 | A kind of pair of bursting work operates method, system and the storage medium to exercise supervision |
| CN110567329A (en) * | 2019-08-09 | 2019-12-13 | 中铁七局集团有限公司 | differential blasting vibration and flyrock control method |
| CN110926284A (en) * | 2019-11-21 | 2020-03-27 | 抚顺罕王傲牛矿业股份有限公司 | Medium-length hole blasting one-time well completion method |
| CN111692931B (en) * | 2019-12-05 | 2022-07-05 | 南京铁道职业技术学院 | Intelligent hole distribution method for tunnel blasting |
| CN114593651B (en) * | 2022-03-23 | 2024-02-09 | 中国水利水电第七工程局有限公司 | Smooth blasting construction method for gas tunnel |
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| KR100323151B1 (en) * | 1999-12-31 | 2002-02-06 | 조영동 | Tunnel blasting method with large empty holes and pre-splitting of circular cut |
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| CN1120114A (en) * | 1994-07-13 | 1996-04-10 | 鲜京建设株式会社 | Method for excavating a working face |
| KR20020061952A (en) * | 2001-01-19 | 2002-07-25 | 주식회사 부암테크 | Smooth Blasting Tunnels |
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