CN104596373A - Excitation needle detonation construction method for mountain tunnel - Google Patents
Excitation needle detonation construction method for mountain tunnel Download PDFInfo
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- CN104596373A CN104596373A CN201510002016.0A CN201510002016A CN104596373A CN 104596373 A CN104596373 A CN 104596373A CN 201510002016 A CN201510002016 A CN 201510002016A CN 104596373 A CN104596373 A CN 104596373A
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Abstract
The invention relates to an excitation needle detonation construction method for a mountain tunnel. According to the method, a non-electric initiating network is adopted, and excitation points of a blasting network are detonation by excitation needles. The method has the advantages that a fine blasting design is achieved, the utilization ratio of explosive energy is increased, the cost of investment is reduced, the construction environment is improved, and the construction efficiency is increased.
Description
Technical field
The present invention relates to a kind of Novel explosion construction method.
Background technology
Along with the fast development of transportation, the construction of highway turns to Freeway of Mountain Range by Plain rolling terrain, and the construction of mountain tunnel more and more becomes the focus of people's concern.Because the use of traditional priming system is by the impact of a lot of extraneous factor, often there is the security incident that morning is quick-fried, report by mistake.For guaranteeing the construction safety in tunnel, NONEL demolition network is adopted to become the development trend of constructing tunnel.
Summary of the invention
The object that the present invention will reach: under the premise that security is guaranteed, reduces explosive specific charge, improves the utilization rate of explosive energy, reaches the object of the explosion that becomes more meticulous, and improve construction environment, improves efficiency of construction, shortens the engineering time of each circulation, reduces costs.
The present invention realizes above-mentioned purpose in the following ways:
A kind of mountain tunnel excites pin to detonate construction, and adopt NONEL demolition network, executing the explosive used in quick-fried construction has: non-electric ms detonator, ammonium nitrate emulsion, detonator connector, excite pin, initiator, airspace bag; Blasting circuit adopts and bunch downlink connection method, from face, being linked in sequence from high to low, from the near to the remote, detonator is no more than 20 for cluster, other by high section in hole, low section of hole external application is other, and use detonator propagation of explosion, Nonel detonator is ignited, and periphery hole adopts fuse arming test experiment initiation, other holes adopt Nonel detonator indirect initiation, and the shot point of blasting network adopts and excites pin to detonate.
Further, according to the different situations of country rock, determine use two benching tunnelling method or three benching tunnelling methods, if country rock is more complete, then use two benching tunnelling methods, if country rock is more broken, then use three benching tunnelling methods.
The present invention, in the quick-fried network design of brill, has taken into full account reduction explosive specific charge, has accomplished the explosion design that becomes more meticulous, has improve the utilization rate of explosive energy, ensure that explosive energy is uniformly distributed, reduced the expense of secondary blasting and artificial treatment.Adopt non-electric initiation, boosting explosive material, to construction environment, power supply for construction, stray electrical current, radio-frequency current, chemical fibre clothes wear equal no requirement (NR), construction environment improves, efficiency significantly improves, shorten the engineering time of each circulation, reduce the input of labour cost, fee of material, cost also declines to a great extent thereupon.
Bore quick-fried network design by becoming more meticulous, non-electric initiation system will become the trend of the times of constructing tunnel, the normalization that also can become, stopped priming system early quick-fried, report by mistake, the generation of accident of miss-firing, to social harmony, stablely to lay a good foundation.Hole blasting design also obtains the affirmative of owner, supervisor, colleague simultaneously, and this is the intangible asset of enterprise development, surely can create larger social benefit.
Detailed description of the invention
First, make tunnel center line and excavation contour line, press hole blasting design icon borehole position with the paint of different colours, can spud in after meeting the requirements on inspection.
Then, adopt the boring of air leg air rock drill, veteran driller is responsible for the driller of snubber, periphery hole, and the inspection of the position of establishing special messenger to be responsible for holing, angle, the degree of depth and guidance, improve drilling quality, snubber, periphery hole will adopt inclinometer to check, and whether the angle of drilling rod conforms to hole blasting design, and aperture error is not more than 5cm, and the aperture error of reliever is not more than 10cm.The extrapolation slope of periphery hole is not more than 5cm/m, and extrapolated value controls in 10cm, and maximum is no more than 15cm, reduces the step of two artillery salvo stubbles.When excavation face concavo-convex larger time, borehole depth should be adjusted by actual conditions, make periphery hole and reliever eyeground on same vertical plane.Jewel hole is complete, is undertaken checking and making a record, should heavily bore undesirable borehole by borehole layout drawing, can hole clearly after qualified on inspection.
Finally, powder charge adopts artificial department with wooden tamper to do.The specification that cartridge bag all requires according to hole blasting design at priming system process house, size are processed.Periphery hole adopts the underground borehole blasting structure that is not coupled, and uncouple coefficient gets 1.5 ~ 2.0, uses airspace bag to control the interval of explosive; Design quantity continuous charging pressed by snubber, reliever; Multiple-row blasting material is cohesive soil volume, and plug-hole stemming adopts the Product processing of PN-x type Stemming machine or stable performance of the same type, and stemming is generally diameter 27mm, also can change the mould of different-diameter according to blasthole diameter; Stem length is generally not less than 20cm, gives full play to the broken rock effect of air-shock wave, improves the capacity usage ratio of explosive, reduces the growing amount of the pernicious gases such as NO, CO.
Drill-and-blast method computing formula:
1, single hole amount of consumption of drugs calculates
Ｑ﹦q×s×L
Wherein: q-explosion 1m
3rock dosage (explosive specific charge kg/m
3),
S-basal area (m
2), L-big gun hole depth (m)
Q gets: IV grade of 0.8kg, V grade of 0.5Kg;
During powder charge, snubber dose increases by 30%, reliever is got (0.55 ~ 0.60) q;
2, borehole number calculates
Ｎ﹦0.0012×(qs/ad2)
Wherein: q-explosion 1m
3rock dosage (explosive specific charge kg/m
3)
S-excavated section amasss (m
2)
A-dynamite charge coefficient gets 0.7 ~ 0.9
D-pencil diameter gets 0.04m
3, periphery hole Selecting parameter
E ﹦ (8 ~ 18d) or E ﹦ (0.5 ~ 0.7) m
W light ﹦ (10 ~ 12) d or W light ﹦ (0.6 ~ 0.8) m
M ﹦ E/W light or m ﹦ 0.8-1.0
D ﹦ d hole/d medicine or D ﹦ 1.25 ~ 2.00
Wherein: E-pitch-row (m) W light-periphery hole burden (the quick-fried layer thickness of light) (m)
D-borehole diameter (m) m-periphery hole close coefficient
D-uncouple coefficient q=(0.15 ~ 0.20) kg/m(linear charging density)
Drill bit generally adopts 40mm, and borehole diameter is 40.4mm
The diameter that tunnel explosive cartridge often adopts has: 22mm, 25mm, 32mm, 35mm.
Wang Zhuan fort, Shanxi Province to tunnel, fanshi highway Tai An ridge is that two-way six-lane long tunnel completed in June, 2013, adopt and be non-ly electrically excited pin initiation system, periphery hole adopts photoface exploision, control out break well, save jetting cement more than 4000 cubes, the time of each excavation circulation is shortened simultaneously, shortens the duration, improves the economic benefit of enterprise.
Shanxi Ji County is that two-way Four-Lane Road super long tunnel completed in September, 2014 to happy former tunnel, Hejin highway north, adopts non-ly to be electrically excited pin initiation system.Although country rock is more broken, in work progress, periphery hole adopts decoupling charge structure, detonates simultaneously, particularly enter 500 meters, hole and use zero oxygen balance emulsion afterwards, while having saved first lining concrete, accelerate construction speed, the pernicious gas in hole is controlled, and is guaranteeing under safe prerequisite, economic benefit obviously increases, and in north, happy former tunnel is achieved environmental protection theory.
Claims (2)
1. a mountain tunnel excites pin to detonate construction, it is characterized in that: adopt NONEL demolition network, executing the explosive used in quick-fried construction has: non-electric ms detonator, ammonium nitrate emulsion, detonator connector, excite pin, initiator, airspace bag; Blasting circuit adopts and bunch downlink connection method, from face, being linked in sequence from high to low, from the near to the remote, detonator is no more than 20 for cluster, another by high section in hole, low section of hole external application is other, and big quick-fried with detonator, Nonel detonator is ignited, and periphery hole adopts fuse arming test experiment initiation, other holes adopt Nonel detonator indirect initiation, and the shot point of blasting network adopts and excites pin to detonate.
2. a kind of mountain tunnel according to claim 1 excites pin to detonate construction, it is characterized in that: according to the different situations of country rock, determines use two benching tunnelling method or three benching tunnelling methods, if country rock is more complete, then use two benching tunnelling methods, if country rock is more broken, then use three benching tunnelling methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002016.0A CN104596373A (en) | 2015-01-05 | 2015-01-05 | Excitation needle detonation construction method for mountain tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002016.0A CN104596373A (en) | 2015-01-05 | 2015-01-05 | Excitation needle detonation construction method for mountain tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN104596373A true CN104596373A (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510002016.0A Pending CN104596373A (en) | 2015-01-05 | 2015-01-05 | Excitation needle detonation construction method for mountain tunnel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090047912A (en) * | 2007-11-09 | 2009-05-13 | 전남대학교산학협력단 | Blasting method of contour holes in two parts with time delay of 20~25ms |
| CN102494571A (en) * | 2011-12-11 | 2012-06-13 | 中建八局大连建设工程有限公司 | Construction method for damped blasting of tunnels |
| CN103123247A (en) * | 2013-01-07 | 2013-05-29 | 重庆建工集团股份有限公司 | Damping blasting method for steep dip small crossing angle layered surrounding rock small-distance tunnel excavation |
| CN203259076U (en) * | 2013-05-22 | 2013-10-30 | 中鼎国际工程有限责任公司 | Simple shock-conducting tube exciter and initiation system |
| CN103615941A (en) * | 2013-12-11 | 2014-03-05 | 中铁二十三局集团有限公司 | Method for blasting shallow section of modernization railway tunnel |
-
2015
- 2015-01-05 CN CN201510002016.0A patent/CN104596373A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090047912A (en) * | 2007-11-09 | 2009-05-13 | 전남대학교산학협력단 | Blasting method of contour holes in two parts with time delay of 20~25ms |
| CN102494571A (en) * | 2011-12-11 | 2012-06-13 | 中建八局大连建设工程有限公司 | Construction method for damped blasting of tunnels |
| CN103123247A (en) * | 2013-01-07 | 2013-05-29 | 重庆建工集团股份有限公司 | Damping blasting method for steep dip small crossing angle layered surrounding rock small-distance tunnel excavation |
| CN203259076U (en) * | 2013-05-22 | 2013-10-30 | 中鼎国际工程有限责任公司 | Simple shock-conducting tube exciter and initiation system |
| CN103615941A (en) * | 2013-12-11 | 2014-03-05 | 中铁二十三局集团有限公司 | Method for blasting shallow section of modernization railway tunnel |
Non-Patent Citations (2)
| Title |
|---|
| 乔永礼: "铁路客运专线山岭隧道光面***设计与施工", 《科技与企业》 * |
| 王双龙: "长沙地铁2号线西湖公园－溁湾镇区间隧道控制***技术", 《采矿技术》 * |
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| C06 | Publication | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20151120 Address after: 030006 Taiyuan high tech Development Zone, Shanxi province Venture Street, No. 19 Applicant after: Shanxi Road & Bridge Construction Group Address before: 616, room 19, 030006 Pioneer Street, hi tech Zone, Shanxi, Taiyuan Applicant before: SHANXI ROAD AND BRIDGE GROUP, CHANGLIN EXPRESSWAY CO., LTD. |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150506 |
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