CN106091848B - It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion - Google Patents
It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion Download PDFInfo
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- CN106091848B CN106091848B CN201610452471.5A CN201610452471A CN106091848B CN 106091848 B CN106091848 B CN 106091848B CN 201610452471 A CN201610452471 A CN 201610452471A CN 106091848 B CN106091848 B CN 106091848B
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- hole
- keyhole
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- top bar
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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
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
Abstract
Overlength, the method for high inclination-angle tunnel anchorage top bar explosion are realized the invention discloses a kind of；It is characterized in that：Comprise the following steps：（1）Steel for shot；（2）Charge constitution；（3）Multiple-row blasting（4）Initiation net designs；Pass through the implementation of the present invention：1st, explosion carries out detonation successively enables intraocular explosive smoothly to detonate so as to reach more preferable demolition effect.2nd, during tunnel anchorage blast working, each wide open digging vibration of segmentation anchor will not impact to the safety of leading anchor hole country rock.
Description
Technical field
The present invention relates to the explosion field in tunnel anchorage digging process, and in particular to one kind realizes overlength, high inclination-angle tunnel
Anchor top bar method for excavating and blasting.
Background technology
At present, domestic tunnel anchorage is excavated using drilling and blasting method mostly, and the applicable geological conditions of drill bursting construction is wide, expense
It is low, equipment is simple, but easily cause that excavation face forming quality is poor, country rock because blasting method control is improper for high inclination-angle tunnel anchorage
Disturbance is big.And after tunnel anchorage carries out Blasting Excavation using the technology, most significant advantage is to efficiently control blast action, from
And the disturbance to country rock is reduced, the stabilization of country rock is kept, gives full play to the self-supporting of country rock, it is ensured that construction safety.
The content of the invention
It is an object of the invention to provide it is a kind of using explosion realize overlength, high inclination-angle tunnel anchorage top bar excavate side
Method；Excavation border is set to form smooth, smooth-going interface, reduction is backbreak with owing to dig, and the integrality and stability of country rock is kept, so as to protect
Card construction safety is simultaneously cost-effective.
The present invention is achieved in that construction is a kind of and realizes overlength, the method for high inclination-angle tunnel anchorage top bar explosion, and it is special
Sign is：Comprise the following steps：
Step 1：Steel for shot：
1）, top bar burn cut hole and auxiliary keyhole use rectangular arrangement, hole depth is 2.0m.Keyhole is arranged up and down
Away from 0.5m, the aperture of each pair keyhole is 61 ° with face angle away from 2.6m；Aid in the keyhole 65m of array pitch 0. up and down, each pair
The aperture of via hole is 82 ° with face angle away from for 3.2m；
2）, top driving hole in semicircular arc arrange, hole depth 2.0m, often circle tunnel hole pitch-row about 1.0 ~ 1.2m, respectively
0.9 ~ the 1.0m of array pitch in row's driving hole；
3）, periphery smooth surface blast hole along away from 0.05m arrangements on the inside of border or border are excavated, its bore angle presss from both sides with face
Angle is about 1 ~ 2 °, i.e., tilts laterally, and bottom hole, which is fallen within, to be excavated on border；
Step 2：Charge constitution：
In addition to periphery hole, design is from Φ 32mm, the powder stick that length is 200mm, monovolume quality 150g；Periphery hole design choosing
The powder stick for being 200mm with Φ 25mm, length, monovolume quality 100g, keyhole design explosive payload is volume 7；Aid in keyhole design
Explosive payload is volume 6；It is volume 5 to tunnel hole design dose；The powder stick that light blast hole explosive payload is Φ 25mm of volume 3, length is 200mm,
All blastholes ignite explosive in hole using indirect initiation method, i.e. primer [cartridge] is placed in blasthole bottom；
Step 3：Multiple-row blasting：
Multiple-row blasting uses proportioning as 1:3 clay and the mixture of fine sand or viscosity preferably clay block, and block institute
Tamper is made using wooden or bamboo material；
Step 4：Initiation net designs：
1）Top bar explosion is homogeneous segmentation detonation, and firing order is：By middle cut hole to outside auxiliary keyhole, pick
Enter hole, bottom plate hole, the detonation of periphery hole short delay, the short-delay time minimum interval of adjacent row is 50 milliseconds, last row's driving
The short-delay time in hole and photoface exploision hole is not less than 100 milliseconds；
2）Zhu Bao areas are using the nonel tube blasting circuit of homogeneous detonation, broken charges delay, same to row（Same volume layer）Big gun
The same section blasting cap initiation in hole, per hole, built-in 1 hair millisecond detonator, the detonator detonating capsule of all blastholes are connected using cluster parallel way
Connect, the propagation of explosion detonator at networking is excited using electric cap or Nonel detonator blast.
The advantage of the invention is that：Present invention offer is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion,
Excavation border is set to form smooth, smooth-going interface, reduction is backbreak with owing to dig, and the integrality and stability of country rock is kept, so as to ensure
Construction safety is simultaneously cost-effective.
It is of the invention to be compared to traditional blasting method advantage：
1st, explosion carries out detonation successively enables intraocular explosive smoothly to detonate so as to reach more preferable demolition effect.
2nd, during tunnel anchorage blast working, each wide open digging vibration of segmentation anchor will not make to the safety of leading anchor hole country rock
Into influence.
Brief description of the drawings
Fig. 1 is that top bar blasting hole arranges facade layout drawing
Fig. 2 is periphery smooth surface blast hole charge constitution
Fig. 3 is top bar explosion initiation net schematic diagram.
Embodiment
Below in conjunction with accompanying drawing 1-3, the present invention is described in detail, and the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Present invention offer is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion, excavation border is formed light
Sliding, smooth-going interface, reduction are backbreak and owe to dig, and keep the integrality and stability of country rock, so as to ensure construction safety and save into
This.
The specific embodiment of the invention is expanded on further below in conjunction with the accompanying drawings：
A kind of method that tunnel anchorage top bar excavation is realized using explosion, excavation border is formed smooth, smooth-going interface, subtract
Backbreak less and owe to dig, keep the integrality and stability of country rock, so as to ensure construction safety and cost-effective.
Step 1：Steel for shot：
1）, top bar burn cut hole and auxiliary keyhole use rectangular arrangement, hole depth is 2.0m.Keyhole is arranged up and down
Away from 0.5m, the aperture of each pair keyhole is 61 ° with face angle away from 2.6m；Aid in the keyhole 65m of array pitch 0. up and down, each pair
The aperture of via hole is 82 ° with face angle away from for 3.2m.Hole shown in 1 is the blasthole of Drilling in figure.
2）Top is tunneled hole and arranged in semicircular arc, hole depth 2.0m, often the pitch-row about 1.0 ~ 1.2m in circle driving hole, each row
Tunnel the 0.9 ~ 1.0m of array pitch in hole.
3）Along away from 0.05m arrangements on the inside of border or border are excavated, its bore angle presss from both sides periphery smooth surface blast hole with face
Angle is about 1 ~ 2 °, i.e., tilts laterally, and bottom hole, which is fallen within, to be excavated on border.
Step 2：Charge constitution：
In addition to periphery hole, design is from Φ 32mm, the powder stick that length is 200mm, monovolume quality 150g；Periphery hole design choosing
The powder stick for being 200mm with Φ 25mm, length, monovolume quality 100g.Keyhole design explosive payload is volume 7；Aid in keyhole design
Explosive payload is volume 6；It is volume 5 to tunnel hole design dose；The powder stick that light blast hole explosive payload is Φ 25mm of volume 3, length is 200mm.
All blastholes ignite explosive in hole using indirect initiation method, i.e. primer [cartridge] is placed in blasthole bottom；Shown in i.e. 2 in figure.
Step 3：Multiple-row blasting：
Multiple-row blasting uses proportioning as 1:3 clay and the mixture of fine sand or viscosity preferably clay block.Block institute
Tamper is made using wooden or bamboo material.
Step 4：Initiation net designs：
1）, top bar explosion be homogeneous segmentation detonation, firing order is：By middle cut hole to outside auxiliary keyhole,
Tunnel hole, bottom plate hole, the detonation of periphery hole short delay.The short-delay time minimum interval of adjacent row is 50 milliseconds, last row's pick
The short-delay time for entering hole and photoface exploision hole is not less than 100 milliseconds.
2）, Zhu Bao areas using homogeneous detonation, broken charges delay nonel tube blasting circuit.With row（Same volume layer）Big gun
The same section blasting cap initiation in hole, the built-in 1 hair millisecond detonator per hole.The detonator detonating capsule of all blastholes is connected using cluster parallel way
Connect, the propagation of explosion detonator at networking is excited using electric cap or Nonel detonator blast.To reach, short-delay time will between the row of each blasthole
Ask, by Fig. 3 show sequence number 1. -2. -3. -4. -5. -6. -7. -8. order is detonated.
The present invention compares relative to traditional blasting method, has the following advantages that：
1st, explosion carries out detonation successively enables intraocular explosive smoothly to detonate so as to reach more preferable demolition effect.
2nd, during tunnel anchorage blast working, each wide open digging vibration of segmentation anchor will not make to the safety of leading anchor hole country rock
Into influence.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (1)
- A kind of 1. method that tunnel anchorage top bar excavation is realized using explosion, it is characterised in that：Comprise the following steps：Step 1：Steel for shot：1）, top bar burn cut hole and auxiliary keyhole use rectangular arrangement, hole depth is 2.0m, the upper and lower array pitch of keyhole 0.5m, the aperture of each pair keyhole are 61 ° with face angle away from 2.6m；Aiding in keyhole, the 65m of array pitch 0., each pair are auxiliary up and down It is 82 ° with face angle away from for 3.2m to help the aperture in hole；2）Top is tunneled hole and arranged in semicircular arc, hole depth 2.0m, often 1.0 ~ the 1.2m of pitch-row in circle driving hole, each row's driving hole 0.9 ~ 1.0m of array pitch；3）For periphery smooth surface blast hole along away from 0.05m arrangements on the inside of border or border are excavated, its bore angle and face angle are 1 ~ 2 °, i.e., tilt laterally, bottom hole, which is fallen within, to be excavated on border；Step 2：Charge constitution：In addition to periphery hole, design is from Φ 32mm, the powder stick that length is 200mm, monovolume quality 150g； Periphery hole design is from Φ 25mm, the powder stick that length is 200mm, and monovolume quality 100g, keyhole design explosive payload is volume 7；It is auxiliary It is volume 6 to help keyhole design explosive payload；It is volume 5 to tunnel hole design dose；Light blast hole explosive payload is that volume 3 Φ 25mm, length are 200mm powder stick, all blastholes ignite explosive in hole using indirect initiation method, i.e. primer [cartridge] is placed in blasthole bottom；Step 3：Multiple-row blasting：Multiple-row blasting uses proportioning as 1:3 clay and the mixture of fine sand or the preferable clay of viscosity Block, block tamper used and made using wooden or bamboo material；Step 4：Initiation net designs：1）, top bar explosion be homogeneous segmentation detonation, firing order is：By middle cut hole to outside auxiliary keyhole, driving Hole, bottom plate hole, the detonation of periphery hole short delay, the short-delay time minimum interval of adjacent row is 50 milliseconds, last row's driving hole It is not less than 100 milliseconds with the short-delay time in photoface exploision hole；2）, Zhu Bao areas using homogeneous detonation, broken charges delay nonel tube blasting circuit, with artillery salvo hole with same section detonator Detonation, per hole, built-in 1 hair millisecond detonator, the detonator detonating capsule of all blastholes are connected using cluster parallel way, the biography at networking Quick-fried detonator is excited using electric cap or Nonel detonator blast.
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| CN201610452471.5A CN106091848B (en) | 2016-06-22 | 2016-06-22 | It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion |
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| CN106091848B true CN106091848B (en) | 2018-03-27 |
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| CN108915694B (en) * | 2018-07-03 | 2020-03-31 | 河南省水利第二工程局 | Construction method for tunnel lower-layer step full-section protective-layer-free extrusion blasting and road repairing and access protection |
| CN110005434B (en) * | 2019-04-19 | 2020-11-13 | 中国矿业大学(北京) | Constant-resistance large-deformation anchor cable control method for soft rock tunnel surrounding rock large-deformation disaster |
| CN110006300B (en) * | 2019-04-26 | 2021-09-14 | 中建三局第三建设工程有限责任公司 | Blasting excavation method for soft rock and large-inclination-angle tunnel anchor digital detonator |
| CN110425950A (en) * | 2019-07-18 | 2019-11-08 | 三明学院 | A kind of nuclear waste disposal channel explosion vibration damping decreasing loss method and vibration monitor system |
| CN110440649A (en) * | 2019-08-09 | 2019-11-12 | 中铁隧道局集团有限公司 | Hydraulic drill ring drilling large cross-section tunnel steel for shot structure and blasting method |
| CN110608642B (en) * | 2019-09-20 | 2022-04-19 | 中铁二局第二工程有限公司 | Minimally invasive blasting excavation method for maintaining stability of tunnel step |
| CN111521081B (en) * | 2020-05-26 | 2022-07-12 | 中建铁路投资建设集团有限公司 | Construction method for reducing explosion-control over-underproduction blasthole of inclined flat-curve tunnel |
| CN111912307B (en) * | 2020-07-23 | 2022-09-09 | 中交上海航道局有限公司 | Blasting excavation method for V-level surrounding rock large-section granite tunnel |
| CN112781459A (en) * | 2021-01-26 | 2021-05-11 | 中铁十八局集团有限公司 | Small-section water conservancy tuff tunnel overbreak control method |
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| KR970007384B1 (en) * | 1994-07-13 | 1997-05-08 | Sunkyong Const Co | Method for excavating a working face |
| CN101936690A (en) * | 2010-08-30 | 2011-01-05 | 中铁十九局集团有限公司 | Duplex-type wedge-shaped cut and graded construction technology thereof |
| CN101936687A (en) * | 2010-08-30 | 2011-01-05 | 中铁十九局集团第五工程有限公司 | Blast construction method for penetrating complex building group by submarine tunnel at land region section |
| CN102494574B (en) * | 2011-12-07 | 2014-01-29 | 北京交通大学 | Combined blasting method of tunneling electronic detonator and detonator with shock-conducting tube |
| CN105605996A (en) * | 2016-01-28 | 2016-05-25 | 中交隧道工程局有限公司北京分公司 | Method for carrying out bench cut method construction in IV-grade surrounding rocks by using three-arm drill jumbo |
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