CN108036684A - A kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 1.7-1.9m - Google Patents
A kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 1.7-1.9m Download PDFInfo
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- CN108036684A CN108036684A CN201711319199.4A CN201711319199A CN108036684A CN 108036684 A CN108036684 A CN 108036684A CN 201711319199 A CN201711319199 A CN 201711319199A CN 108036684 A CN108036684 A CN 108036684A
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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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Abstract
The present invention relates to the bridge cylinder pile foundation blasting method that a kind of Pile Diameter is 1.7 1.9m, step is drilling, blasting charge, block blasthole mouth, detonation, boring method is to arrange a hollow hole of centre vertically along cylinder pile foundation center line, centered on cylinder pile foundation center line, blasthole inner ring is formed by radius of 0.13 0.17m, blasthole mesosphere is formed by radius of 0.43 0.47m, blasthole outer ring is formed by radius of 0.78 0.82m, 4 keyholes arranged vertically are evenly distributed with blasthole inner ring, 6 via holes arranged vertically are evenly distributed with blasthole mesosphere, 14 periphery holes being obliquely installed are evenly distributed with blasthole outer ring；The central axes of periphery hole and the angle of vertical direction are arccot10 arccot12, and the hole top of periphery hole is small compared with the distance of bottom hole to hollow hole of centre.Blasting quality of the present invention is high, construction efficiency is high, blasting cost is low.
Description
Technical field
The present invention relates to the bridge cylinder pile foundation blasting method that a kind of Pile Diameter is 1.7-1.9m, belong to bridge construction skill
Art field.
Background technology
Cylinder pile extensive use in science of bridge building, cylinder pile foundation excavate generally use blasting method construction, but existing
Method blasting quality is poor, blasting cost is high, low construction efficiency, if method during cylinder pile foundation Excavation blasting is improper, generation it is quick-fried
Broken shock wave, attenuation of seismic waves and slungshot can cause to damage to pile holes protecting wall, occur retaining wall across collapse, chip off-falling, cracking situations such as, by
This destroys pile holes protecting wall effect, influences stake holes adjoining rock stability, and the slungshot of generation is also possible to above damage excavation area near main sidewalk
Construction installation, equipment.Therefore, suitable blasting method must be selected during cylinder stake holes Excavation blasting, on the one hand improves explosion matter
Amount, reduce blasting cost, improve construction efficiency, on the other hand reduces concussion of blasting, avoids damage pile holes protecting wall and construction equipment.
The content of the invention
The technical problem to be solved in the present invention is：It is poor, quick-fried to solve existing highway bridge cylinder pile foundation blasting method blasting quality
Break of high cost, low construction efficiency and the fragile pile holes protecting wall of concussion of blasting, the technical problem of construction equipment, there is provided a kind of pile foundation
The bridge cylinder pile foundation blasting method of a diameter of 1.7-1.9m.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 1.7-1.9m, is comprised the following steps：
Drilling：Along cylinder pile foundation center line vertically arrangement one hollow hole of centre, centered on cylinder pile foundation center line, with
0.13-0.17m forms blasthole inner ring for radius, and big gun is formed centered on cylinder pile foundation center line, by radius of 0.43-0.47m
Hole mesosphere, forms blasthole outer ring, on the blasthole inner ring centered on cylinder pile foundation center line, using 0.78-0.82m as radius
4 keyholes arranged vertically are evenly distributed with, 6 via holes arranged vertically are evenly distributed with the blasthole mesosphere,
14 periphery holes being obliquely installed are evenly distributed with the blasthole outer ring；The central axes of the periphery hole and the folder of vertical direction
Angle is arccot10-arccot12, and the bottom hole of hole top to the distance periphery hole of hollow hole of centre of the periphery hole arrives
The distance of hollow hole of centre is small；
Blasting charge：Installation explosive, the explosive payload Q of keyhole in toward keyhole, via hole and periphery hole1=(0.2-0.23)
r2* q*L* η, the explosive payload Q of via hole (3)2=(0.17-0.19) r2* q*L* η, the explosive payload Q of periphery hole (4)3=(0.09-
0.12)r2*q*L*η；The r is pile foundation radius (m), and the q is explosive specific charge (kg/m3), the L is average borehole depth
(m), the η is blast hole utilizing factor；The q according to《Blasting engineering volume two table 7-3》And country《(09) Budget of Underground Roadway Engineering is fixed
Volume》, can be according to live reality and first in work progress and the lithology (f coefficients 8~10) of caisson blast working part determines
The secondary quick-fried situation of examination is adjusted；
Block blasthole mouth：Block the aperture of the keyhole, via hole and periphery hole；
Detonation：Arrange initiation net, and detonate.
Preferably, the depth of the hollow hole of centre, keyhole, via hole and periphery hole is 1.2m, aperture 40-
45mm。
Preferably, the keyhole and via hole are using coupling continuous charging, and the periphery hole is using coupling spaced loading.
Preferably, the loaded length of the keyhole is 57-62cm, and the loaded length of the via hole is 38-42cm, institute
The loaded length for stating periphery hole is 22-37cm.
Preferably, the blocking of the keyhole, via hole and periphery hole is first blocked with paper or soft fabric, then is blocked up with cohesive soil
Plug.
Preferably, it is characterised in that the stemming length of the keyhole is 0.9-1 times of loaded length, the via hole
Stemming length be 1.2-1.5 times of loaded length, the stemming length of the periphery hole is 1.5-2 times of loaded length.
Preferably, pile foundation Excavation blasting working face often has crevice water or infiltration, therefore preferably selects the strong explosive of waterproof,
As rock emulsion explosive water-resistance is strong, powder stick shaping, is easy to cutting division and power is moderate, if using No. 2 rock ammonium-antimony explosives,
Water-proofing treatment must then be carried out.
Preferably, to improve demolition effect, the degree of fragmentation of rock is effectively improved, the stability of retaining wall is protected, makes keyhole
Interior explosive detonates at first, then explosive initiation in via hole, the explosive initiation in last periphery hole.
Preferably, the initiation net uses millisecond delay electric detonator, and the section of the detonating capsule after keyhole powder charge is not
1, the section of the detonating capsule after via hole powder charge not Wei 3, the section of the detonating capsule after periphery hole powder charge Wei 5.
Preferably, the initiation net uses non-electrical Millisecond Nonel Tube Detonator, the section of the detonating capsule after keyhole powder charge
Not Wei 1, the section of the detonating capsule after via hole powder charge not Wei 3, the section of the detonating capsule after periphery hole powder charge Wei 5.
The beneficial effects of the invention are as follows：
The Pile Diameter of the present invention is the bridge cylinder pile foundation blasting method of 1.7-1.9m, and step is drilling, blasting charge, blocks up
Plug big gun eats dishes without rice or wine, detonates, and the boring method is to arrange a hollow hole of centre vertically along cylinder pile foundation center line, with cylinder pile foundation
Blasthole inner ring is formed centered on heart line, by radius of 0.13-0.17m, centered on cylinder pile foundation center line, with 0.43-0.47m
Blasthole mesosphere is formed for radius, blasthole outer ring, institute are formed centered on cylinder pile foundation center line, by radius of 0.78-0.82m
State and 4 keyholes arranged vertically are evenly distributed with blasthole inner ring, 6 vertical cloth are evenly distributed with the blasthole mesosphere
The via hole put, is evenly distributed with 14 periphery holes being obliquely installed on the blasthole outer ring；The central axes of the periphery hole with
The angle of vertical direction is arccot10-arccot12, and the distance week to hollow hole of centre is pushed up in the hole of the periphery hole
The distance of lateral opening bottom hole to hollow hole of centre is small.The method of the present invention can make full use of explosive energy, reduce explosive consumption, carry
High construction efficiency, has higher blasting quality and relatively low blasting cost；In addition, the present invention blasting method can mitigate it is quick-fried
Broken vibration and slungshot can cause to damage to pile holes protecting wall, avoid the occurrence of retaining wall across collapse, chip off-falling, cracking situations such as, make stake holes country rock
Stablize, moreover it is possible to avoid construction installation above damage excavation area near main sidewalk, equipment.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the pile foundation blasthole floor plan of the present invention；
Fig. 2 is the pile foundation blasthole section layout drawing of the present invention；
Fig. 3 is the pile foundation blast hole loading structure schematic diagram of the present invention；
Reference numeral in figure is：1- hollow hole of centre, 2- keyholes, 3- via holes, 4- periphery holes.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows composition related to the present invention.
Embodiment 1
The present embodiment provides the bridge cylinder pile foundation blasting method that a kind of Pile Diameter is 1.8m, comprise the following steps：
Drilling：As depicted in figs. 1 and 2, a hollow hole of centre 1 is arranged vertically along cylinder pile foundation center line, with cylinder pile foundation
Blasthole inner ring is formed centered on center line, by radius of 0.15m, centered on cylinder pile foundation center line, using 0.45m as radius shape
Into blasthole mesosphere, form blasthole outer ring centered on cylinder pile foundation center line, using 0.8m as radius, on the blasthole inner ring
It is even that 4 keyholes arranged vertically 2 are distributed with, 6 via holes arranged vertically 3 are evenly distributed with the blasthole mesosphere,
14 periphery holes being obliquely installed 4 are evenly distributed with the blasthole outer ring；The central axes of the periphery hole 4 and vertical direction
Angle is arccot12, and the hole top of the periphery hole 4 is to the bottom hole of the distance periphery hole 4 of hollow hole of centre 1 to center
The distance of emptying aperture 1 is small；
Blasting charge：Installation explosive, the explosive payload Q of keyhole 2 in toward keyhole 2, via hole 3 and periphery hole 41=0.21r2*
Q*L* η, the explosive payload Q of via hole2=0.18r2* q*L* η, the explosive payload Q of periphery hole3=0.11r2*q*L*η；The r is stake
Base radius (m), the q are explosive specific charge (kg/m3), the L is average borehole depth (m), and the η is blast hole utilizing factor；This
The q of embodiment is 3.6kg/m3, η 0.8,
Q1=0.21*r2* q*L* η=0.21*0.81m2*3.6kg/m3* 1.2m*0.8=0.59kg, Q2=0.18*r2*q*
L* η=0.18*0.81m2*3.6kg/m3* 1.2m*0.8=0.50kg, Q3=0.11*r2* q*L* η=0.11*0.81m2*
3.6kg/m3* 1.2m*0.8=0.31kg；
The present embodiment selects rock emulsion explosive, and the explosive waterproof is strong, powder stick shaping, is easy to cutting division and power is fitted
In；As shown in figure 3, the keyhole 2 is connected using coupling continuous charging, loaded length 60cm, the via hole 3 using coupling
Continuous powder charge, loaded length 40cm, the periphery hole 4 is using coupling spaced loading, loaded length 30cm；
Block blasthole mouth：The aperture of the keyhole 2, via hole 3 and periphery hole 4 is blocked, the present embodiment is first blocked with paper,
Blocked again with cohesive soil, the stemming length of the keyhole 2 is 60cm, and the stemming length of the via hole 3 is 50cm, the week
Lateral opening 4 stemming length is 50cm；
Detonation：Arrange initiation net, and detonate；The present embodiment uses millisecond delay electric detonator initiation net, and keyhole 2 fills
The section of detonating capsule after medicine not Wei 1, the section of the detonating capsule after 3 powder charge of via hole not Wei 3, the detonation after 4 powder charge of periphery hole
The section of detonator not Wei 5, the explosive in keyhole 2 is first detonated, explosive in via hole 3 re-detonates, and the explosive in periphery hole 4 is most
After detonate, this design can improve demolition effect, protect the stability of retaining wall.
Embodiment 2
The present embodiment provides the bridge cylinder pile foundation blasting method that a kind of Pile Diameter is 1.9m, comprise the following steps：
Drilling：As depicted in figs. 1 and 2, a hollow hole of centre 1 is arranged vertically along cylinder pile foundation center line, with cylinder pile foundation
Blasthole inner ring is formed centered on center line, by radius of 0.17m, centered on cylinder pile foundation center line, using 0.37m as radius shape
Into blasthole mesosphere, blasthole outer ring is formed centered on cylinder pile foundation center line, using 0.67m as radius, on the blasthole inner ring
4 keyholes arranged vertically 2 are evenly distributed with, 6 via holes arranged vertically are evenly distributed with the blasthole mesosphere
3,14 periphery holes being obliquely installed 4 are evenly distributed with the blasthole outer ring；The central axes of the periphery hole 4 and vertical direction
Angle be arccot10, and the hole top of the periphery hole 4 to the distance periphery hole 4 of hollow hole of centre 1 bottom hole in
The distance of heart emptying aperture 1 is small；
Blasting charge：Installation explosive, the explosive payload Q of keyhole 2 in toward keyhole 2, via hole 3 and periphery hole 41=0.26*
r2Q*L* η, the explosive payload Q of via hole2=0.22*r2Q*L* η, the explosive payload Q of periphery hole3=0.11*r2q*L*η；The q is fried
Prescription consumes (kg/m3), the L is average borehole depth (m), and the η is blast hole utilizing factor；The q of the present embodiment is 4.5kg/m3, η
For 0.8, Q1=0.2*r2* q*L* η=0.2*0.9m2*3.6kg/m3* 1.2m*0.8=0.62kg, Q2=0.17*r2* q*L* η=
0.17*0.9m2*3.6kg/m3* 1.2m*0.8=0.53kg, Q3=0.12*r2* q*L* η=0.12*0.9m2*3.6kg/m3*
1.2m*0.8=0.37kg；
The present embodiment selects rock emulsion explosive, and the explosive waterproof is strong, powder stick shaping, is easy to cutting division and power is fitted
In；As shown in figure 3, the keyhole 2 is connected using coupling continuous charging, loaded length 62cm, the via hole 3 using coupling
Continuous powder charge, loaded length 42cm, the periphery hole 4 is using coupling spaced loading, loaded length 37cm；
Block blasthole mouth：The aperture of the keyhole 2, via hole 3 and periphery hole 4 is blocked, the present embodiment is first with soft fabric
Blocking, then blocked with cohesive soil, the stemming length of the keyhole 2 is 56cm, and the stemming length of the via hole 3 is 63cm,
The stemming length of the periphery hole 4 is 74cm；
Detonation：Arrange initiation net, and detonate；The present embodiment uses non-electrical Millisecond Nonel Tube Detonator initiation net, slotting
The section of detonating capsule after 2 powder charge of hole not Wei 1, the section of the detonating capsule after 3 powder charge of via hole not Wei 3, after 4 powder charge of periphery hole
The section of detonating capsule not Wei 5, the explosive in keyhole 2 is first detonated, explosive in via hole 3 re-detonates, fried in periphery hole 4
Medicine finally detonates, this design can improve demolition effect, protect the stability of retaining wall.
Embodiment 3
The present embodiment provides the bridge cylinder pile foundation blasting method that a kind of Pile Diameter is 1.7m, comprise the following steps：
Drilling：As depicted in figs. 1 and 2, a hollow hole of centre 1 is arranged vertically along cylinder pile foundation center line, with cylinder pile foundation
Blasthole inner ring is formed centered on center line, by radius of 0.13m, centered on cylinder pile foundation center line, using 0.43m as radius shape
Into blasthole mesosphere, blasthole outer ring is formed centered on cylinder pile foundation center line, using 0.78m as radius, on the blasthole inner ring
4 keyholes arranged vertically 2 are evenly distributed with, 6 via holes arranged vertically are evenly distributed with the blasthole mesosphere
3,14 periphery holes being obliquely installed 4 are evenly distributed with the blasthole outer ring；The central axes of the periphery hole 4 and vertical direction
Angle be arccot11, and the hole top of the periphery hole 4 to the distance periphery hole 4 of hollow hole of centre 1 bottom hole in
The distance of heart emptying aperture 1 is small；
Blasting charge：Installation explosive, the explosive payload Q of keyhole 2 in toward keyhole 2, via hole 3 and periphery hole 41=0.22q*
L* η, the explosive payload Q of via hole2=0.181q*L* η, the explosive payload Q of periphery hole3=0.08q*L* η；The q is explosive specific charge
(kg/m3), the L is average borehole depth (m), and the η is blast hole utilizing factor；The q of the present embodiment is 4.5kg/m3, η 0.8,
Q1=0.23*q*L* η=0.23*0.72m2*3.6kg/m3* 1.2m*0.8=0.57kg, Q2=0.19*q*L* η=0.19*
0.72m2*3.6kg/m3* 1.2m*0.8=0.47kg, Q3=0.09*q*L* η=0.09*0.72m2*3.6kg/m3*1.2m*0.8
=0.22kg；
The present embodiment selects rock emulsion explosive, and the explosive waterproof is strong, powder stick shaping, is easy to cutting division and power is fitted
In；As shown in figure 3, the keyhole 2 is connected using coupling continuous charging, loaded length 57cm, the via hole 3 using coupling
Continuous powder charge, loaded length 38cm, the periphery hole 4 is using coupling spaced loading, loaded length 22cm；
Block blasthole mouth：The aperture of the keyhole 2, via hole 3 and periphery hole 4 is blocked, the present embodiment is first blocked with paper,
Blocked again with cohesive soil, the stemming length of the keyhole 2 is 57cm, and the stemming length of the via hole 3 is 46cm, the week
Lateral opening 4 stemming length is 33cm；
Detonation：Arrange initiation net, and detonate；The present embodiment uses millisecond delay electric detonator initiation net, and keyhole 2 fills
The section of detonating capsule after medicine not Wei 1, the section of the detonating capsule after 3 powder charge of via hole not Wei 3, the detonation after 4 powder charge of periphery hole
The section of detonator not Wei 5, the explosive in keyhole 2 is first detonated, explosive in via hole 3 re-detonates, and the explosive in periphery hole 4 is most
After detonate, this design can improve demolition effect, protect the stability of retaining wall.
It is complete by above-mentioned description, relevant staff using the above-mentioned desirable embodiment according to the present invention as enlightenment
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
Claims (10)
1. a kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 1.7-1.9m, it is characterised in that is comprised the following steps：
Drilling：Along cylinder pile foundation center line vertically arrangement one hollow hole of centre (1), centered on cylinder pile foundation center line, with
0.13-0.17m forms blasthole inner ring for radius, and big gun is formed centered on cylinder pile foundation center line, by radius of 0.43-0.47m
Hole mesosphere, forms blasthole outer ring, on the blasthole inner ring centered on cylinder pile foundation center line, using 0.78-0.82m as radius
4 keyholes arranged vertically (2) are evenly distributed with, 6 auxiliary arranged vertically are evenly distributed with the blasthole mesosphere
Hole (3), is evenly distributed with 14 periphery holes being obliquely installed (4) on the blasthole outer ring；The central axes of the periphery hole (4) with
The angle of vertical direction is arccot10-arccot12, and the hole top of the periphery hole (4) to hollow hole of centre (1) distance compared with
The distance of bottom hole to the hollow hole of centre (1) of the periphery hole (4) is small；
Blasting charge：Installation explosive, the explosive payload Q of keyhole (2) in toward keyhole (2), via hole (3) and periphery hole (4)1=
(0.2-0.23)r2* q*L* η, the explosive payload Q of via hole (3)2=(0.17-0.19) r2* q*L* η, the explosive payload of periphery hole (4)
Q3=(0.09-0.12) r2*q*L*η；The r is pile foundation radius (m), and the q is explosive specific charge (kg/m3), the L is average
Borehole depth (m), the η are blast hole utilizing factor；
Block blasthole mouth：Block the aperture of the keyhole (2), via hole (3) and periphery hole (4)；
Detonation：Arrange initiation net, and detonate.
2. Pile Diameter according to claim 1 is the bridge cylinder pile foundation blasting method of 1.7-1.9m, it is characterised in that
The hollow hole of centre (1), keyhole (2), the depth of via hole (3) and periphery hole (4) are 1.2m, aperture 40-45mm.
3. Pile Diameter according to claim 1 or 2 is the bridge cylinder pile foundation blasting method of 1.7-1.9m, its feature exists
In the keyhole (2) and via hole (3) are using coupling continuous charging, and the periphery hole (4) is using coupling spaced loading.
4. according to the bridge cylinder pile foundation blasting method that claim 1-3 any one of them Pile Diameter is 1.7-1.9m, institute
The loaded length for stating keyhole (2) is 57-62cm, and the loaded length of the via hole (3) is 38-42cm, the periphery hole (4)
Loaded length be 22-37cm.
5. it is the bridge cylinder pile foundation blasting method of 1.7-1.9m according to claim 1-4 any one of them Pile Diameter, its
It is characterized in that, the blocking of the keyhole (2), via hole (3) and periphery hole (4) is first blocked with paper or soft fabric, then with sticky
Soil blocks.
6. it is the bridge cylinder pile foundation blasting method of 1.7-1.9m according to claim 1-5 any one of them Pile Diameter, its
It is characterized in that, the stemming length of the keyhole (2) is 0.9-1 times of loaded length, and the stemming length of the via hole (3) is
1.2-1.5 times of loaded length, the stemming length of the periphery hole (4) are 1.5-2 times of loaded length.
7. it is the bridge cylinder pile foundation blasting method of 1.7-1.9m according to claim 1-6 any one of them Pile Diameter, its
It is characterized in that, the explosive is rock emulsion explosive or No. 2 rock ammonium-antimony explosives Jing Guo water-proofing treatment.
8. it is the bridge cylinder pile foundation blasting method of 1.7-1.9m according to claim 1-7 any one of them Pile Diameter, its
It is characterized in that, the explosive in keyhole (2) detonates at first, then via hole (3) interior explosive initiation, in last periphery hole (4)
Explosive initiation.
9. it is the bridge cylinder pile foundation blasting method of 1.7-1.9m according to claim 1-8 any one of them Pile Diameter, its
Be characterized in that, the initiation net uses millisecond delay electric detonator, the section of the detonating capsule after keyhole (2) powder charge not Wei 1, it is auxiliary
Help the section of the detonating capsule after hole (3) powder charge not Wei 3, the section of the detonating capsule after periphery hole (4) powder charge Wei 5.
10. it is the bridge cylinder pile foundation blasting method of 1.7-1.9m according to claim 1-8 any one of them Pile Diameter, its
It is characterized in that, the initiation net uses non-electrical Millisecond Nonel Tube Detonator, and the section of the detonating capsule after keyhole (2) powder charge is not
1, the section of the detonating capsule after via hole (3) powder charge not Wei 3, the section of the detonating capsule after periphery hole (4) powder charge Wei 5.
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| CN201711319199.4A CN108036684A (en) | 2017-12-12 | 2017-12-12 | A kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 1.7-1.9m |
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|---|---|---|---|
| CN201711319199.4A CN108036684A (en) | 2017-12-12 | 2017-12-12 | A kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 1.7-1.9m |
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| CN109372509A (en) * | 2018-11-16 | 2019-02-22 | 西北矿冶研究院 | Arrangement method for double-hollow-hole rhombic cut holes in access filling mining |
| CN110345820A (en) * | 2019-07-09 | 2019-10-18 | 谢俊 | A kind of straight eye blasting technique of auxiliary slotting |
| CN110671981A (en) * | 2019-10-10 | 2020-01-10 | 昆明理工大学 | Smooth blasting method for vertical shaft tunneling in high stress environment |
| CN111707151A (en) * | 2020-06-11 | 2020-09-25 | 武汉大学 | One-time blasting excavation forming method for offshore rock-socketed pile foundation |
| CN111749612A (en) * | 2020-06-11 | 2020-10-09 | 武汉大学 | Excavation method for large-diameter offshore rock-socketed pile foundation pit |
| CN111895870A (en) * | 2020-07-26 | 2020-11-06 | 中国水利水电第七工程局有限公司 | Inclined shaft blasting particle size control method |
| CN114674186A (en) * | 2022-03-11 | 2022-06-28 | 北京中煤矿山工程有限公司 | Tunnel shaft deep hole blasting tunneling collimation hole undermining method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372509A (en) * | 2018-11-16 | 2019-02-22 | 西北矿冶研究院 | Arrangement method for double-hollow-hole rhombic cut holes in access filling mining |
| CN110345820A (en) * | 2019-07-09 | 2019-10-18 | 谢俊 | A kind of straight eye blasting technique of auxiliary slotting |
| CN110671981A (en) * | 2019-10-10 | 2020-01-10 | 昆明理工大学 | Smooth blasting method for vertical shaft tunneling in high stress environment |
| CN110671981B (en) * | 2019-10-10 | 2021-09-21 | 昆明理工大学 | Smooth blasting method for vertical shaft tunneling in high stress environment |
| CN111707151A (en) * | 2020-06-11 | 2020-09-25 | 武汉大学 | One-time blasting excavation forming method for offshore rock-socketed pile foundation |
| CN111749612A (en) * | 2020-06-11 | 2020-10-09 | 武汉大学 | Excavation method for large-diameter offshore rock-socketed pile foundation pit |
| CN111749612B (en) * | 2020-06-11 | 2021-12-03 | 武汉大学 | Excavation method for large-diameter offshore rock-socketed pile foundation pit |
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| CN111895870B (en) * | 2020-07-26 | 2022-07-05 | 中国水利水电第七工程局有限公司 | Inclined shaft blasting particle size control method |
| CN114674186A (en) * | 2022-03-11 | 2022-06-28 | 北京中煤矿山工程有限公司 | Tunnel shaft deep hole blasting tunneling collimation hole undermining method |
| CN114674186B (en) * | 2022-03-11 | 2024-03-26 | 北京中煤矿山工程有限公司 | Method for tunneling straight-line cutting through deep hole blasting of tunnel shaft |
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Application publication date: 20180515 |