CN107462118A - Large cross-section tunnel circulates development blasting method - Google Patents
Large cross-section tunnel circulates development blasting method Download PDFInfo
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- CN107462118A CN107462118A CN201710748830.6A CN201710748830A CN107462118A CN 107462118 A CN107462118 A CN 107462118A CN 201710748830 A CN201710748830 A CN 201710748830A CN 107462118 A CN107462118 A CN 107462118A
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- tunnel
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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
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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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- General Engineering & Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of large cross-section tunnel to circulate development blasting method, comprises the following steps：In the center bottom of large cross-section tunnel face, one section of guide tunnel is tunneled along large cross-section tunnel bearing of trend；On Duo Transverse section of guide tunnel, guide hole is radially beaten by certain depth, guide hole is distributed along guide tunnel into sector；The scalloped profile edge to be formed is distributed in multiple guide holes, multiple big cross section periphery holes are beaten along guide tunnel axis direction；One section of large cross-section tunnel is formed after detonation guide hole and big cross section periphery hole, a passage will be shoveled out in the middle part of large cross-section tunnel, the barren rock for avalanche of detonating is shoveled to passage both sides, is laid to step；Stages cycle is constructed, until completing the headwork of whole large cross-section tunnel.The cycle operation of large cross-section tunnel development blasting is realized, improves drivage efficiency, greatly reduces concussion of blasting, improves the security of constructing tunnel, reduces the requirement to rig, reduces person works' intensity, improves boring work efficiency.
Description
Technical field
The present invention relates to Tunnel Blasting driving technology field, and in particular to a kind of large cross-section tunnel circulates development blasting side
Method.
Background technology
Since the 1960s, Tunnel Blasting driving technology is constantly progressive and develops.Wet type is developed into from dry drilling
Drilling, have developed that large quantities of drilling qualities are good, the mechanization rig of efficiency high；From blasting cap detonation, electric detonator initiation development
For plastic detonating tube non-electric initiation；The emulsion of waterproof is developed into from common rocks explosive.Although the machine for tunnel piercing
Tool equipment and explosive property have significant progress, but the technique of development blasting does not change substantially, are all actual according to tunnel
Situation arranges slotting secondary peripheral hole explosion avalanche rock.This method is widely used, achieved when tunnel cross-section is smaller compared with
Good effect, but when large cross-section tunnel tunnels, effect is not satisfactory, needs to undergo scraper barren rock after onepull, slags tap, clears up
The a whole set of operation such as working face, drilling could carry out the blasting work of next stage.And because cross dimensions is larger, tradition side
The demolition effect of method is not satisfactory, can also produce larger seismic wave.And onepull stage curtailment also be present, drill
High expensive, circulation driving can not be realized caused by blasting technology flow, the problems such as duration is longer.Therefore need a kind of new quick-fried
Broken driving method, explosion circulation driving is realized, improves drivage efficiency.
The content of the invention
The technical problem to be solved in the present invention is, in view of the foregoing defects the prior art has, there is provided a kind of big cross section
Tunnel circulates development blasting method, realizes the cycle operation of large cross-section tunnel development blasting, improves drivage efficiency, significantly reduce
Concussion of blasting, improves the security of constructing tunnel, reduces the requirement to rig, reduce person works' intensity,
Improve boring work efficiency.
The present invention is that technical scheme is used by solving above-mentioned technical problem：
A kind of large cross-section tunnel circulates development blasting method, comprises the following steps：
1) in the center bottom of large cross-section tunnel face, the guiding of one section of depth is tunneled along large cross-section tunnel bearing of trend
Tunnel；
2) using guide tunnel as the scope of freedom, on Duo Transverse section of guide tunnel, guide hole is radially beaten by certain depth,
Multiple guide holes are distributed along guide tunnel into sector；
3) the scalloped profile edge to be formed is distributed in multiple guide holes, multiple big cross section weeks is beaten along guide tunnel axis direction
It is lateral opening；
4) one section of large cross-section tunnel is formed after detonation guide hole and big cross section periphery hole, one will be shoveled out in the middle part of large cross-section tunnel
Passage, the barren rock for avalanche of detonating is shoveled to passage both sides, the barren rock of passage both sides is laid to platform, platform is used as to big cross section
The workbench of tunnel face surface construction；
5) repeat step 1)~4), stages cycle construction, until completing the headwork of whole large cross-section tunnel.
According to above-mentioned technical proposal, in described step 1), tunneling the specific steps of guide tunnel includes：According to traditional tunnel
Road development blasting method, on tunnel tunnel face in the range of guide tunnel to be dug, snubber, reliever and periphery hole are bored, is risen
Quick-fried snubber, reliever and periphery hole, form one section of guide tunnel.
According to above-mentioned technical proposal, in described step 2), the outer end of guide hole extends to large cross-section tunnel to be excavated
Outline edge.
According to above-mentioned technical proposal, in described step 3), the length of big cross section periphery hole and the length one of guide tunnel
Cause.
The invention has the advantages that：
By tunneling the guide tunnel of one section of depth in advance, as the scope of freedom of large cross-section tunnel explosion, can realize big
The cycle operation of bore tunnel development blasting, the bursting work of large cross-section tunnel is decomposed into independent sinking and blasting operation twice,
Drivage efficiency is improved, reduces the activity duration, greatly reduces concussion of blasting, the vibrations to having holed is reduced, prevents
Tunnel Landslide, the security of constructing tunnel is improved, after large cross-section tunnel explosion is carried out into decomposition blast, reduce rendrock
The difficulty of respective bore before embedment, reduces the requirement to rig, and all types can be completed without purchasing many types of rig
The boring work of blasthole, saves substantial contribution, reduces person works' intensity, and work is punched as large cross-section tunnel using barren rock
The workbench of work, the barren rock scraper time is saved, improves boring work efficiency.
Brief description of the drawings
Fig. 1 is the cross-sectional view to be drilled in the embodiment of the present invention when tunneling guide tunnel on face；
Fig. 2 is the schematic diagram for laying guide hole in the embodiment of the present invention using guide tunnel as the scope of freedom；
Fig. 3 is the schematic diagram that large cross-section tunnel stages cycle is constructed in the embodiment of the present invention
In figure, 1- snubbers, reliever and periphery hole, 2- guide holes, 3- bank blasting length, 4- big cross section periphery holes, 5-
Platform, 6- resistance line lengths, 7- guide tunnels, 8- large cross-section tunnels, 9- passages.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Shown in 1~Fig. 3 of reference picture, the large cross-section tunnel circulation development blasting side in one embodiment provided by the invention
Method, comprise the following steps：
1) in the center bottom of the face of large cross-section tunnel 8, drawing for one section of depth is tunneled along the bearing of trend of large cross-section tunnel 8
Lead tunnel 7；
2) it is the scope of freedom with guide tunnel 7, on Duo Transverse section of guide tunnel 7, radially beats and lead by certain depth
Hole 2, multiple guide holes 2 are distributed along guide tunnel 7 into sector；
3) in the scalloped profile edge that the distribution of multiple guide holes 2 is formed, multiple big cross sections are beaten along the axis direction of guide tunnel 7
Periphery hole 4；
4) one section of large cross-section tunnel 8 is formed after detonation guide hole 2 and big cross section periphery hole 4, the middle part of large cross-section tunnel 8 is shoveled out
One passage 9, the barren rock for avalanche of detonating is shoveled to the both sides of passage 9, the barren rock of the both sides of passage 9 is laid to platform 5 (if for spreading
, can be by outside unnecessary barren rock scraper to tunnel if the barren rock of step is also unnecessary), platform 5 is as to the face of large cross-section tunnel 8
The workbench 5 of construction；
5) repeat step 1)~4), stages cycle construction, until completing the headwork in whole tunnel.
Further, in described step 1), the specific steps of driving guide tunnel 7 include：According to conventional tunnel explosion
Driving method, on tunnel tunnel face in the range of guide tunnel 7 to be dug, snubber, reliever and periphery hole are bored, slotting of detonating
Eye, reliever and periphery hole 1, one section of guide tunnel 7 is formed, and the barren rock for avalanche of detonating is shoveled out into guide tunnel 7.
Further, in described step 2), the outer end of guide hole 2 extends to the outline of large cross-section tunnel 8 to be excavated
Edge, or guide hole 2 length plus guide tunnel 7 radius be equal to large cross-section tunnel 8 radius.
Further, in described step 3), the length of big cross section periphery hole 4 is consistent with the length of guide tunnel 7.
Further, in described step 2), the distance between adjacent cross section provided with fan-shaped distribution guide hole 2 is resistance
Line length 6.
In one embodiment of the present of invention, operation principle of the invention：
In figure, the row of the inner guide hole 2 of quantity and bank blasting length 3 of guide hole 2, only make schematically illustrate, design parameter
Selected according to mine actual conditions.
The present invention is described further below in conjunction with the accompanying drawings, and this method includes：
A:As shown in figure, in tunnel cross-section middle and lower part according to conventional tunnel development blasting method, according to the actual feelings in tunnel
Condition, arrange arrangement snubber, reliever and the blasthole of periphery hole 1, its blast hole depth relevant with blasting stage length.
B:After detonation, the rock scraper of avalanche is gone out into tunnel.In the tunnel of formation, according to the explosion side made
Case, such as figure two, the guide hole 2 of shape of axially and radially being fanned along tunnel distribution, and beat big cross section periphery in tunnel edge design attitude
Hole 4, hole depth are relevant with blasting stage length.
C:Detonate after the guide hole 2 of big cross section periphery hole 4 and fan-shaped distribution, the rock of avalanche need not whole scrapers go out tunnel.
Scraper in the middle part of tunnel is first gone out into a passage 9, so that rig is used in the punching of next stage " scope of freedom " tunnel.In rig punching
Meanwhile the rock of tunnel two side portions is subjected to accumulation arrangement, and a more smooth platform 5 is formed, it is as shown in Figure 3, convenient
Rig bores the periphery hole of next stage large cross-section tunnel 8.
D：The development blasting in whole tunnel is completed in repeat step A-C, circulation.
In summary, the minitunnel of certain depth is formed at the middle part of large cross-section tunnel 8 using traditional Cut Blasting method,
As the scope of freedom of the explosion of large cross-section tunnel 8, and risen in minitunnel according to the guide hole 2 of some fan-shaped distributions of design arrangement
After quick-fried while accumulation barren rock is arranged, the boring work of next stage explosion can be carried out.Compared with prior art, this method is dug
Enter efficiency to significantly improve, the cyclic advance operation of development blasting can be realized, the activity duration is greatly reduced.In the prior art,
The number of the boring hole of once detonation is more, the more difficult control of concussion of blasting, the security and stability in tunnel is had a great influence.The present invention will be big
The bursting work of bore tunnel 8 is divided into independent progress twice, significantly reduces shadow of the concussion of blasting to tunnel safety stability
Ring.Compared with traditional Cut Blasting driving method, this method is carried out twice due to the bursting work of large cross-section tunnel 8 being divided into,
The requirement to rig is reduced, the boring work of all types blasthole can be completed without purchasing many types of rig, save
Substantial contribution, reduce person works' intensity.While scraper arranges the barren rock of first stage explosion avalanche, it can carry out down
The punching work of one stage minitunnel, treat that both sides barren rock can be punched after the completion of arranging using barren rock as large cross-section tunnel 8
The workbench 5 of work, the barren rock scraper time is saved, boring work efficiency is improved, realizes cycle operation.
The interest field for being only presently preferred embodiments of the present invention, the present invention can not being limited with this certainly above,
Therefore the equivalence changes made according to scope of the present invention patent, still belong to protection scope of the present invention.
Claims (4)
1. a kind of large cross-section tunnel circulates development blasting method, it is characterised in that comprises the following steps：
1) in the center bottom of large cross-section tunnel face, the guiding tunnel of one section of depth is tunneled along large cross-section tunnel bearing of trend
Road；
2) using guide tunnel as the scope of freedom, on Duo Transverse section of guide tunnel, guide hole is radially beaten by certain depth, it is multiple
Guide hole is distributed along guide tunnel into sector；
3) the scalloped profile edge to be formed is distributed in multiple guide holes, multiple big cross section peripheries is beaten along guide tunnel axis direction
Hole；
4) one section of large cross-section tunnel is formed after detonation guide hole and big cross section periphery hole, large cross-section tunnel middle part is shoveled out into one leads to
Road, the barren rock for avalanche of detonating is shoveled to passage both sides, the barren rock of passage both sides is laid to platform, platform is used as to big cross section tunnel
The workbench of road area surface construction；
5) repeat step 1)~4), stages cycle construction, until completing the headwork of whole large cross-section tunnel.
2. large cross-section tunnel according to claim 1 circulates development blasting method, it is characterised in that described step 1)
In, tunneling the specific steps of guide tunnel includes：According to conventional tunnel development blasting method, wait to dig guiding on tunnel tunnel face
In the range of tunnel, snubber, reliever and periphery hole are bored, detonation snubber, reliever and periphery hole, forms one section of guiding tunnel
Road.
3. large cross-section tunnel according to claim 1 circulates development blasting method, it is characterised in that described step 2)
In, the outer end of guide hole extends to the outline edge of large cross-section tunnel to be excavated.
4. large cross-section tunnel according to claim 1 circulates development blasting method, it is characterised in that described step 3)
In, the length of big cross section periphery hole is consistent with the length of guide tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710748830.6A CN107462118A (en) | 2017-08-28 | 2017-08-28 | Large cross-section tunnel circulates development blasting method |
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| CN201710748830.6A CN107462118A (en) | 2017-08-28 | 2017-08-28 | Large cross-section tunnel circulates development blasting method |
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| CN107462118A true CN107462118A (en) | 2017-12-12 |
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| CN201710748830.6A Pending CN107462118A (en) | 2017-08-28 | 2017-08-28 | Large cross-section tunnel circulates development blasting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002674A (en) * | 2018-10-09 | 2018-12-14 | 浙江省水利水电勘测设计院 | A kind of tunnel group construction speed emulation mode and system |
| CN112796770A (en) * | 2020-12-30 | 2021-05-14 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Tunnel forming method |
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| CN1369055A (en) * | 1999-08-06 | 2002-09-11 | Ltm公司 | Three dimensional multi-phase tunneling method and equipment thereof |
| CN102758633A (en) * | 2011-04-29 | 2012-10-31 | 中国华冶科工集团有限公司 | Construction method for large- cross section tunnel with better condition of surrounding rock |
| CN103541734A (en) * | 2013-11-01 | 2014-01-29 | 中铁四局集团有限公司 | Comprehensive blasting damping method for tunnel of underpass civil security building |
| CN104912559A (en) * | 2015-06-02 | 2015-09-16 | 北车建设工程有限责任公司 | Rapid construction method for long and large double-multiple arch tunnel |
| CN107218043A (en) * | 2017-08-27 | 2017-09-29 | 中铁二十局集团第六工程有限公司 | A kind of breaking surrounding rock cavern excavation method |
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2017
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Patent Citations (6)
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| CN1369055A (en) * | 1999-08-06 | 2002-09-11 | Ltm公司 | Three dimensional multi-phase tunneling method and equipment thereof |
| CN102758633A (en) * | 2011-04-29 | 2012-10-31 | 中国华冶科工集团有限公司 | Construction method for large- cross section tunnel with better condition of surrounding rock |
| CN103541734A (en) * | 2013-11-01 | 2014-01-29 | 中铁四局集团有限公司 | Comprehensive blasting damping method for tunnel of underpass civil security building |
| CN104912559A (en) * | 2015-06-02 | 2015-09-16 | 北车建设工程有限责任公司 | Rapid construction method for long and large double-multiple arch tunnel |
| CN107218043A (en) * | 2017-08-27 | 2017-09-29 | 中铁二十局集团第六工程有限公司 | A kind of breaking surrounding rock cavern excavation method |
| CN107905798A (en) * | 2017-11-01 | 2018-04-13 | 中国建筑第八工程局有限公司 | The method that flat top wall boring construction is carried out using central drift method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002674A (en) * | 2018-10-09 | 2018-12-14 | 浙江省水利水电勘测设计院 | A kind of tunnel group construction speed emulation mode and system |
| CN112796770A (en) * | 2020-12-30 | 2021-05-14 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Tunnel forming method |
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Application publication date: 20171212 |