CN105698619A - Blasting construction method used before construction of mountain shortcuts above existing roads - Google Patents
Blasting construction method used before construction of mountain shortcuts above existing roads Download PDFInfo
- Publication number
- CN105698619A CN105698619A CN201610075491.5A CN201610075491A CN105698619A CN 105698619 A CN105698619 A CN 105698619A CN 201610075491 A CN201610075491 A CN 201610075491A CN 105698619 A CN105698619 A CN 105698619A
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- Prior art keywords
- hole
- blasting
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- mountain
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Classifications
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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
-
- 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
Abstract
The invention belongs to the field of mountain blast working, and particularly relates to a blasting construction method used before construction of mountain shortcuts above existing roads. Step shallow hole blasting is adopted for mountain excavation road sections, the blasting area above the existing roads is covered with a protective net, the blasting work amount is checked according to the construction scheme, friable rock and surface soil above rock are removed, the plum blossom type hole distribution mode is adopted for blast holes, micro-delay detonation between rows is adopted for the detonation order, and the peak vibration velocity of the surface of the area with a power grid tower foundation is smaller than 5.0 cm/s. According to the method, the blasting accuracy and the direction of flying stones generated by blasting can be effectively controlled, and the blasting requirements before construction of the mountain shortcuts can be met on the basis of guaranteeing the safety of the existing roads and nearby residents.
Description
Technical field
The invention belongs to massif blast working field, particularly relate to the blasting construction method before massif sidewalk above a kind of existing road is built。
Background technology
Along with being pushed further into of China's capital construction, massif road is developed, construction task is more and more heavier, but it is equipped with road on a lot of massifs or below massif, such as provincial highway, national highway or highway, traditional massif blasting method cannot be applicable to this kind of Topographic Patterns, because the rubble that explosion produces can tumble in a large number to existing road and neighbouring local-style dwelling houses, cause serious security incident。Therefore be badly in need of developing the blasting construction method before massif sidewalk above a kind of existing road is built, ensure existing road and near local-style dwelling houses safety basis on, meet the construction demand of massif sidewalk。
Summary of the invention
It is an object of the invention to provide the blasting construction method before massif sidewalk above a kind of existing road is built, ensure existing road and near local-style dwelling houses safety basis on, meet the construction demand of massif sidewalk。
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows:
Design the blasting construction method before massif sidewalk above a kind of existing road is built, massif is excavated section and adopts step shallow bore hole Loose Control Blasting the blast area covered protection net above existing road；
Specifically include following blast working step:
Check blasting engineering amount according to arrangement and method for construction, and unconsolidated rock and the table above lashing is native；Big gun hole pattern adopts triangular arranged to arrange；Firing order adopts millisecond detonating between row；In the place having electrical network column foot, the peak value shake speed on its surface is less than 5.0cm/s；
Blasting parameter controls as follows:
1) minimum burden: 0.6-1.0m；
2) blasthole drilling bore dia: 45mm；
3) blasthole drilling hole hole position error: ± 10cm, hole depth: 2.5m, hole depth error: ± 10cm；
4) big gun hole ultra-deep: 0.1m；
5) explosive specific charge: 0.3-0.35kg/m3, dynamite quantity per hole: 1.2～1.4kg；
6) with artillery salvo pitch of holes: 1.2-1.4m, big gun hole array pitch: 0.8-1m；
7) blasthole drilling orifice angle and circuit are 45 ° of angles, adopt the boring of horizontal path direction on backer side；
8) blast hole projectile filling adopts seriality charge constitution, stemming length: 1.0-1.2m；
9) blasting circuit adopts Non-electric Igniting Nonel Detonators system: millisecond detonating networking is along line alignment with between section row for same column, and every tier hole fills same section of other non-electric ms detonator, the between row and row section of jumping。
Preferably, after described each blast hole projectile filling terminates, adopt in aperture sandy soil fines to fill, protect top, big gun hole seamless。
Preferably, every separate explosion length is 10m。
Preferably, described blasting construction method, its blasting parameter controls as follows:
1) minimum burden: 0.8m；
2) blasthole drilling bore dia: 45mm；
3) blasthole drilling hole hole position error: ± 10cm, hole depth: 2.5m, hole depth error: ± 10cm；
4) big gun hole ultra-deep: 0.1m；
5) explosive specific charge: 0.3kg/m3, dynamite quantity per hole: 1.2kg；
6) with artillery salvo pitch of holes: 1.3m, big gun hole array pitch: 0.8m；
7) blasthole drilling orifice angle and circuit are 45 ° of angles, adopt the boring of horizontal path direction on backer side, with the error at the angle of inclination in artillery salvo hole: ± 1.5 degree；
8) blast hole projectile filling adopts seriality charge constitution, stemming length: 1.1m；
9) blasting circuit adopts Non-electric Igniting Nonel Detonators system: millisecond detonating networking is along line alignment with between section row for same column, and every tier hole fills same section of other non-electric ms detonator, the between row and row section of jumping。
The present invention compared with prior art, has the advantage that
Can fly to by the slungshot that produces of effectively controlled blasting precision and explosion, ensure existing road and near local-style dwelling houses safety basis on, meet the explosion demand before massif sidewalk is built。
Accompanying drawing explanation
Fig. 1 is that the same column in embodiment is with millisecond detonating network chart between section row；
Fig. 2 is bore angle schematic diagram in embodiment；
Fig. 3 is blast hole loading structure schematic diagram in embodiment。
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with the drawings and the specific embodiments, the present invention is further elaborated。Should be appreciated that detailed description of the invention described herein is only in order to explain the present invention, is not intended to limit the present invention。
2014 to the blasting construction method before the monastery sidewalk construction in Peng Ba township, Ganzi Luding County, Sichuan Province。
The long 8039m of monastery sidewalk, the building of monastery sidewalk be winding and on, sidewalk one road is the steep bank of steep cliff, and based on rock excavation, the vertical discrepancy in elevation reaches 580m, and road is narrow on the way, bend is curved up to 16 roads, and slope sharp bend is anxious。Being Zone of Arranging Immigration and 318 national highways under mountain, greatly, security situation is severe, and difficulty of construction is big for people, vehicle flowrate。
Newly repairing sidewalk and need winding open circuit, original massif carries out excavation, sidewalk construction parameter is as follows:
(1) sidewalk width 4.5m；Set remittance track one place per every about 300 meters, set widened section, wide 7.0m at remittance track, camber larger part；
(2) smallest curve radius: general smallest curve radius 20m, is 15m under extremely difficult condition；
(3) ruling grade: be generally 7.5%, is 11% under hard situation。
Before sidewalk construction, massif is excavated section and adopts step shallow bore hole Loose Control Blasting the blast area covered protection net above 318 national highways；
Concrete blast working step is as follows:
Blasting engineering amount is checked according to arrangement and method for construction, and unconsolidated rock above lashing and table soil, big gun hole pattern adopts equilateral triangle type arranged, and firing order adopts millisecond detonating between row, in the place having electrical network column foot, the peak value shake speed on its surface is less than 5.0cm/s；Every separate explosion length is 10m；
Blasting parameter is as follows:
1) minimum burden: 0.8m；
2) blasthole drilling bore dia: 45mm；
3) blasthole drilling hole hole position error: ± 10cm, hole depth: 2.5m, hole depth error: ± 10cm；
4) big gun hole ultra-deep: 0.1m；
5) explosive specific charge: 0.3kg/m3, dynamite quantity per hole: 1.2kg；
6) with artillery salvo pitch of holes: 1.3m, big gun hole array pitch: 0.8m；
7) blasthole drilling orifice angle and circuit are 45 ° of angles, adopt the boring of horizontal path direction on backer side, with the error at the angle of inclination in artillery salvo hole: ± 1.5 degree；
8) blast hole projectile filling adopts seriality charge constitution, stemming length: 1.1m, after blast hole projectile filling terminates, adopts in aperture sandy soil fines to fill, protects top, big gun hole seamless；
9) blasting circuit adopts Non-electric Igniting Nonel Detonators system: millisecond detonating networking is along line alignment with between section row for same column, and every tier hole fills same section of other non-electric ms detonator, the between row and row section of jumping。
Claims (4)
1. above an existing road massif sidewalk build before blasting construction method, it is characterised in that massif is excavated section and adopts step shallow bore hole Loose Control Blasting, and the blast area covered protection net above existing road；
Specifically include following blast working step:
Check blasting engineering amount according to arrangement and method for construction, and unconsolidated rock and the table above lashing is native；Big gun hole pattern adopts triangular arranged to arrange；Firing order adopts millisecond detonating between row；In the place having electrical network column foot, the peak value shake speed on its surface is less than 5.0cm/s；
Blasting parameter controls as follows:
1) minimum burden: 0.6-1.0m；
2) blasthole drilling bore dia: 45mm；
3) blasthole drilling hole hole position error: ± 10cm, hole depth: 2.5m, hole depth error: ± 10cm；
4) big gun hole ultra-deep: 0.1m；
5) explosive specific charge: 0.3-0.35kg/m3, dynamite quantity per hole: 1.2～1.4kg；
6) with artillery salvo pitch of holes: 1.2-1.4m, big gun hole array pitch: 0.8-1m；
7) blasthole drilling orifice angle and circuit are 45 ° of angles, adopt the boring of horizontal path direction on backer side；
8) blast hole projectile filling adopts seriality charge constitution, stemming length: 1.0-1.2m；
9) blasting circuit adopts Non-electric Igniting Nonel Detonators system: millisecond detonating networking is along line alignment with between section row for same column, and every tier hole fills same section of other non-electric ms detonator, the between row and row section of jumping。
2. blasting construction method as claimed in claim 1, it is characterised in that after described each blast hole projectile filling terminates, adopts sandy soil fines to fill in aperture, and top, big gun hole is seamless。
3. blasting construction method as claimed in claim 1, it is characterised in that every separate explosion length is 10m。
4. blasting construction method as claimed in claim 1, it is characterised in that described blasting parameter controls as follows:
1) minimum burden: 0.8m；
2) blasthole drilling bore dia: 45mm；
3) blasthole drilling hole hole position error: ± 10cm, hole depth: 2.5m, hole depth error: ± 10cm；
4) big gun hole ultra-deep: 0.1m；
5) explosive specific charge: 0.3kg/m3, dynamite quantity per hole: 1.2kg；
6) with artillery salvo pitch of holes: 1.3m, big gun hole array pitch: 0.8m；
7) blasthole drilling orifice angle and circuit are 45 ° of angles, adopt the boring of horizontal path direction on backer side, with the error at the angle of inclination in artillery salvo hole: ± 1.5 degree；
8) blast hole projectile filling adopts seriality charge constitution, stemming length: 1.1m；
9) blasting circuit adopts Non-electric Igniting Nonel Detonators system: millisecond detonating networking is along line alignment with between section row for same column, and every tier hole fills same section of other non-electric ms detonator, the between row and row section of jumping。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075491.5A CN105698619A (en) | 2016-02-03 | 2016-02-03 | Blasting construction method used before construction of mountain shortcuts above existing roads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075491.5A CN105698619A (en) | 2016-02-03 | 2016-02-03 | Blasting construction method used before construction of mountain shortcuts above existing roads |
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| CN105698619A true CN105698619A (en) | 2016-06-22 |
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| CN201610075491.5A Pending CN105698619A (en) | 2016-02-03 | 2016-02-03 | Blasting construction method used before construction of mountain shortcuts above existing roads |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063014A (en) * | 2017-05-23 | 2017-08-18 | 安徽江南爆破工程有限公司 | Slope method is cut in the step controlled blasting of cutting shallow bore hole under complex environment |
| CN114251099A (en) * | 2021-11-25 | 2022-03-29 | 中交二公局东萌工程有限公司 | Blasting excavation method for crossed caverns |
| CN114719695A (en) * | 2022-03-30 | 2022-07-08 | 西北核技术研究所 | Tunnel for engineering blasting in soft rock mass and design method for blocking tunnel |
| CN114877765A (en) * | 2022-06-14 | 2022-08-09 | 保利长大工程有限公司 | Blasting control method for temporary traffic road section |
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| CN102809329A (en) * | 2012-08-17 | 2012-12-05 | 重庆市爆破工程建设有限责任公司 | Stone shallow hole blasting control method applied in town |
| CN103629980A (en) * | 2013-12-16 | 2014-03-12 | 中铁二十三局集团第四工程有限公司 | Adjacent existing railway steep mountain loosen control blast construction method |
| CN104634198A (en) * | 2014-12-13 | 2015-05-20 | 中铁十九局集团第二工程有限公司 | Controlled blasting construction method in mountain excavation close to expressway side |
| CN104848753A (en) * | 2015-04-20 | 2015-08-19 | 中铁二十五局集团第一工程有限公司 | Rock blasting control construction method implemented near existing railway line |
| CN205245910U (en) * | 2015-12-31 | 2016-05-18 | 中铁二十二局集团第一工程有限公司 | Shallow hole blasting structure |
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2016
- 2016-02-03 CN CN201610075491.5A patent/CN105698619A/en active Pending
Patent Citations (5)
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| CN102809329A (en) * | 2012-08-17 | 2012-12-05 | 重庆市爆破工程建设有限责任公司 | Stone shallow hole blasting control method applied in town |
| CN103629980A (en) * | 2013-12-16 | 2014-03-12 | 中铁二十三局集团第四工程有限公司 | Adjacent existing railway steep mountain loosen control blast construction method |
| CN104634198A (en) * | 2014-12-13 | 2015-05-20 | 中铁十九局集团第二工程有限公司 | Controlled blasting construction method in mountain excavation close to expressway side |
| CN104848753A (en) * | 2015-04-20 | 2015-08-19 | 中铁二十五局集团第一工程有限公司 | Rock blasting control construction method implemented near existing railway line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063014A (en) * | 2017-05-23 | 2017-08-18 | 安徽江南爆破工程有限公司 | Slope method is cut in the step controlled blasting of cutting shallow bore hole under complex environment |
| CN107063014B (en) * | 2017-05-23 | 2018-11-20 | 安徽江南爆破工程有限公司 | Slope method is cut in cutting shallow bore hole step control explosion under complex environment |
| CN114251099A (en) * | 2021-11-25 | 2022-03-29 | 中交二公局东萌工程有限公司 | Blasting excavation method for crossed caverns |
| CN114251099B (en) * | 2021-11-25 | 2024-04-16 | 中交二公局东萌工程有限公司 | Blasting excavation method for cross grotto |
| CN114719695A (en) * | 2022-03-30 | 2022-07-08 | 西北核技术研究所 | Tunnel for engineering blasting in soft rock mass and design method for blocking tunnel |
| CN114877765A (en) * | 2022-06-14 | 2022-08-09 | 保利长大工程有限公司 | Blasting control method for temporary traffic road section |
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Application publication date: 20160622 |
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