CN108917507A - A kind of variable diameters are radially uniform not to couple continuous charging structure and its loading method - Google Patents
A kind of variable diameters are radially uniform not to couple continuous charging structure and its loading method Download PDFInfo
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- CN108917507A CN108917507A CN201810734570.1A CN201810734570A CN108917507A CN 108917507 A CN108917507 A CN 108917507A CN 201810734570 A CN201810734570 A CN 201810734570A CN 108917507 A CN108917507 A CN 108917507A
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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
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Continuous charging structure and its loading method are not coupled the present invention relates to Controlled blasting technique field more particularly to a kind of variable diameters are radially uniform.The charge constitution includes variable diameters cartridge, positioning device, Nonel detonator and emulsion, the variable diameters cartridge is formed by connecting by the pvc pipe of different-diameter, positioning device is fixed on the outside of the variable diameters cartridge, the variable diameters cartridge basis rest has Nonel detonator, is filled with emulsion inside the variable diameters cartridge.The corresponding loading method of continuous charging structure is not coupled the present invention also provides variable diameters are radially uniform.The present invention, which can be avoided, causes excess destruction to the part of hole wall, improves the flatness of surrounding rock stability and outline excavation face, and can be improved the effective rate of utilization of explosive, overcomes rock mass clamping action, lower the drilling difficulty of subsequent cycle.
Description
Technical field
Continuous charging knot is not coupled the present invention relates to Controlled blasting technique field more particularly to a kind of variable diameters are radially uniform
Structure and its loading method.
Technical background
During bursting work, due to the effect of explosive energy, the country rock other than excavation contour line can usually be caused
Different degrees of destruction influences the stability and integrality of proximity structure body.It is exactly on the boundary of design that periphery hole, which controls explosion,
When carrying out Excavation blasting in range, intensive blasthole is drilled out along outline excavation, using decoupling charge structure, in the explosion of the area Zhu Bao
Before or after detonate so that the contoured surface formed after quick-fried has compared with high-flatness and can maintain the blasting technique of adjoining rock stability.
Periphery hole Controlled blasting technique mainly uses airspace axial direction decoupling charge structure or radial air not at present
Coupling charging structure.For airspace axial direction decoupling charge structure, reserved airspace can drop to a certain extent
Low detonation pressure increases detonation gas there are the time, improves rock fracture into the quality of seam, but this charge constitution is for dress
The hole wall rock of medicine section is still that can generate very big explosive load, on longitudinal direction powder charge section and airspace section Energy distribution not
Uniformly, powder charge section energy comparison concentration will make corresponding position hole wall country rock excess destruction occur, cause quick-fried rear-wheel profile surface smooth
Spending poor, part surrounding rock stability reduces.Radial air Uncoincided charge, can also play reduces detonation pressure, increases quick-fried life
There are the effects of time for gas, but due in actual job blasthole be mostly it is horizontal or vertical inclined, explosive can be in gravity
Lower abutting blasthole side, the energy of explosive charge are not evenly radially to act on blasthole surrounding rock, close to pack
Side hole wall also will appear local excessive destruction, also result in it is quick-fried after formed profile surface evenness is poor, part adjoining rock stability
Property reduce.
Summary of the invention
The shortcomings that the purpose of the present invention is to solve the prior arts, and a kind of variable diameters proposed radially uniform do not couple
Continuous charging structure and its loading method, the present invention, which can be avoided, causes excess destruction to the part of hole wall, improves adjoining rock stability
Property and outline excavation face flatness, and can be improved the effective rate of utilization of explosive, overcome rock mass clamping action, lower next follows
The drilling difficulty of ring.
To achieve the goals above, present invention employs following technical solutions：
A kind of variable diameters are radially uniform not to couple continuous charging structure, including variable diameters cartridge, positioning device, detonator
Detonator and emulsion, the variable diameters cartridge are formed by connecting by the pvc pipe of different-diameter, outside the variable diameters cartridge
Side is fixed with positioning device, and the variable diameters cartridge basis rest has Nonel detonator, dress inside the variable diameters cartridge
It is filled with emulsion.
Preferably, the pvc pipe is by the sequence from bottom hole to aperture, diameter ratio 1.2：1：0.8, length ratio 1：
1：1, the pvc pipe thickness is identical, and the both ends of the pvc pipe are respectively equipped with inside thread and outside screw, and the pvc pipe passes through
Inside thread and outside screw are attached, by the sequence from bottom hole to aperture, the inside thread of No.1 pvc pipe and No. two PVC
Pipe outside screw matches, and the inside thread of No. two pvc pipes matches with No. three pvc pipe outside screws.
Preferably, the positioning device includes two semi-circular pipe clamps, the semi-circular pipe clamp internal diameter and pvc pipe outer diameter
Match, the semi-circular pipe clamp outer diameter is matched with blasthole diameter, and the joint of the semi-circular pipe clamp is fluted and buckles, described recessed
Slot matches with buckle size, and the buckle includes sliding cylinder, spring and clamp, and the spring one end is fixed in sliding cylinder
Portion, the spring other end are fixed with clamp.
Preferably, it is provided with U-shaped breach on the outside of the semi-circular pipe clamp, the U-shaped breach has detonator to pass through, and avoids leading quick-fried
Extruding, friction of the pipe during filling between semi-circular pipe clamp and hole wall, prevent detonator from damaging and generating blind big gun.
Preferably, the emulsion is gluey emulsion, and gluey emulsion has good plasticity, Ke Yisui
Machine is shaped so as to filling pvc pipe.
Preferably, the positioning device is uniformly mounted on the outside of pvc pipe using multiple groups, when loading emulsion in pvc pipe
After, pvc pipe easily occurs bending and deformation under the action of emulsion weight, and being evenly arranged multiple groups positioning device can guarantee
Pvc pipe does not occur bending and deformation, and prevents powder stick from deviateing blasthole center line.
A kind of radially uniform loading method for not coupling continuous charging structure of variable diameters, specifically carries out according to the following steps：
1) periphery hole that diameter is D, depth is L is drilled out along outline excavation, determines that powder charge is long with orographic condition according to rock
Spend L1And stemming length L2；
It 2) is 1.2 by the sequence diameter ratio of bottom hole to aperture：1：0.8, length ratio 1：1：1 three sections of pvc pipes of selection,
Respectively No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes, the outer diameter of No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes press than
Example is sequentially reduced respectively D1、D2、D3, total length, which is equal to, designs loaded length L1；
3) according to the outer diameter D of No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes1、D2、D3, select internal diameter for D1、D2、D3、
Outer diameter and the matched three kinds of semi-circular pipe clamps of blasthole diameter D, are uniformly mounted on matching No.1 for every kind of semi-circular pipe clamp
The outside of pvc pipe, No. two pvc pipes and No. three pvc pipes, two return bends are stuck on the outside of pvc pipe and are mutually butted, firmly will buckle
Clamp toward pushing away in groove, the subsequent spring of clamp compresses in sliding cylinder, after clamp is completely into groove, springback and
Clamp resets, and by buckling semi-circular pipe clamp clamping, is fixedly secured on the outside of pvc pipe.
4) in the basis rest Nonel detonator of No.1 pvc pipe, and in No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes
Gluey emulsion is loaded in inside, and No.1 pvc pipe and No. two pvc pipes are passed through outside No.1 pvc pipe inside thread and No. two pvc pipes
Side is threaded togather, and No. two pvc pipes and No. three pvc pipes are passed through spiral shell on the outside of No. two pvc pipe inside threads and No. three pvc pipes
Line links together, and detonator is then made to pass through the U-shaped breach of one of semi-circular pipe clamp of each positioning device；
5) variable diameters cartridge is put into blasthole, and then aperture is blocked with plugging material, stemming length L2, complete
Continuous charging is not coupled radially at the variable diameters of periphery hole.
The beneficial effects of the invention are as follows：
1) present invention uses variable diameters continuous charging structure, and the mounting and positioning device on the outside of variable diameters cartridge, continuously
Powder charge improves the situation of the Energy distribution unevenness of powder charge section and airspace section on axial direction, and positioning device can be by blasthole
Interior powder stick is located on blasthole center line, can prevent explosive from directly contacting with hole wall, and explosive energy exists after explosive charge
Powder stick is uniformly distributed in the radial direction, causes excess destruction so as to avoid the part to hole wall, improve surrounding rock stability and
The flatness in outline excavation face.
2) the variable diameters cartridge that the present invention is formed by connecting using a variety of different-diameter pvc pipes, pvc pipe diameter from bottom hole to
Aperture is sequentially reduced, so that explosive payload is sequentially reduced from bottom hole to aperture, due to increasing the clamping action of rock with blast hole depth
It can gradually increase, therefore this variable diameters charge constitution, can be improved the effective rate of utilization of explosive, overcome rock mass clamping action,
And the scope of freedom of subsequent cycle can be caused centainly to destroy, lower the drilling difficulty of subsequent cycle.
Detailed description of the invention
Fig. 1 is the radially uniform decoupling charge structure schematic diagram of variable diameters of the present invention；
Fig. 2 is single pvc pipe schematic diagram of the present invention；
Fig. 3 is multiple pvc pipe connection schematic diagrams of the present invention；
Fig. 4 is positioning device schematic diagram of the present invention；
Fig. 5 is buckle schematic diagram of the present invention.
In figure：1 plugging material, 2 positioning devices, 3 emulsions, 4 variable diameters cartridges, 5 detonators, 6 Nonel detonators,
7PVC pipe, 7-1 No.1 pvc pipe, No. bis- pvc pipes of 7-2, No. tri- pvc pipes of 7-3,8 external screw-threads, 9 internal whorls, 10 return bends
Card, 11U v notch v, 12 grooves, 13 buckles, 14 sliding cylinders, 15 springs, 16 clamps.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, is not whole embodiments.
Examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated identical or classes
As element or element with the same or similar functions.The embodiments described below with reference to the accompanying drawings are exemplary, purport
It is being used to explain the present invention, and is being not considered as limiting the invention.
Referring to Fig.1-5, a kind of variable diameters are radially uniform does not couple continuous charging structure, including variable diameters cartridge 4, positioning
Device 2, Nonel detonator 6 and emulsion 3, the variable diameters cartridge 4 is formed by connecting by the pvc pipe 7 of different-diameter, described
The outside of variable diameters cartridge 4 is fixed with positioning device 2, and 4 basis rest of variable diameters cartridge has Nonel detonator 6, institute
It states and is filled with emulsion 3 inside variable diameters cartridge 4.
Preferably, the pvc pipe 7 is by the sequence from bottom hole to aperture, diameter ratio 1.2：1：0.8, length ratio is
1：1：1,7 thickness of pvc pipe is identical, and the both ends of the pvc pipe 7 are respectively equipped with inside thread 9 and outside screw 8, the PVC
Pipe 7 is attached by inside thread 9 and outside screw 8, by the sequence from bottom hole to aperture, the inside spiral shell of No.1 pvc pipe 7-1
Line matches with No. two pvc pipe 7-2 outside screws, the inside thread of No. two pvc pipe 7-2 and No. three pvc pipe 7-3 outside screw phases
Matching.
The positioning device 2 includes two semi-circular pipe clamps 10,10 internal diameter of semi-circular pipe clamp and 7 outer diameter of pvc pipe
Match, 10 outer diameter of semi-circular pipe clamp is matched with blasthole diameter, the joint fluted 12 of the semi-circular pipe clamp 10 and buckle
13, the groove 12 matches with 13 sizes of buckle, and the buckle 13 includes sliding cylinder 14, spring 15 and clamp 16, the bullet
15 one end of spring is fixed on inside sliding cylinder 14, and 15 other end of spring is fixed with clamp 16.
U-shaped breach 11 is provided on the outside of the semi-circular pipe clamp 10, the U-shaped breach 11 has detonator 5 to pass through, avoids leading quick-fried
Extruding, friction of the pipe 5 during filling between semi-circular pipe clamp 10 and hole wall, prevent detonator 5 from damaging and generating blind big gun.
The emulsion 3 is gluey emulsion, and gluey emulsion has good plasticity, can be randomly shaped
In order to be packed into pvc pipe 7.
The positioning device 2 is uniformly mounted on 7 outside of pvc pipe using multiple groups, when loaded in pvc pipe 7 emulsion 3 with
Afterwards, pvc pipe 7 easily occurs bending and deformation under the action of 3 weight of emulsion, and being evenly arranged multiple groups positioning device 2 can guarantee PVC
Pipe 7 does not occur bending and deformation, and prevents powder stick from deviateing blasthole center line.
Embodiment
The loading method for not coupling continuous charging structure radially uniform for variable diameters, specifically carries out according to the following steps：
1) periphery hole that diameter is D, depth is L is drilled out along outline excavation, determines that powder charge is long with orographic condition according to rock
Spend L1And stemming length L2；
It 2) is 1.2 by the sequence diameter ratio of bottom hole to aperture：1：0.8, length ratio 1：1：1 three sections of pvc pipes of selection
7, respectively No.1 pvc pipe 7-1, No. two pvc pipe 7-2 and No. three pvc pipe 7-3, No.1 pvc pipe 7-1, No. two pvc pipe 7-2 and three
The outer diameter of number pvc pipe 7-3 is sequentially reduced respectively D in proportion1、D2、D3, total length, which is equal to, designs loaded length L1；
3) according to the outer diameter D of No.1 pvc pipe 7-1, No. two pvc pipe 7-2 and No. three pvc pipe 7-31、D2、D3, select internal diameter for
D1、D2、D3, outer diameter and the matched three kinds of semi-circular pipe clamps 10 of blasthole diameter D, every kind of semi-circular pipe clamp 10 is uniformly mounted on
Matched No.1 pvc pipe 7-1, No. two pvc pipe 7-2 and No. three pvc pipe 7-3 outside, two semi-circular pipe clamps 10 are in pvc pipe
7 outsides are mutually butted, and will firmly buckle 13 clamp 16 toward pushing away in groove 12, the subsequent spring 15 of clamp 16 is in sliding cylinder 14
Compression, after clamp 16 is completely into groove 12, the rebound of spring 15 and the reset of clamp 16, by buckling 13 for semi-circular pipe clamp 10
Clamping is fixedly secured in 7 outside of pvc pipe.
4) in the basis rest Nonel detonator 6 of No.1 pvc pipe 7-1, and in No.1 pvc pipe 7-1, No. two pvc pipe 7-2 and
Gluey emulsion is loaded inside No. three pvc pipe 7-3, and No.1 pvc pipe 7-1 and No. two pvc pipe 7-2 are passed through into No.1 pvc pipe 7-1
Inside thread and No. two pvc pipe 7-2 outside screws link together, and No. two pvc pipe 7-2 and No. three pvc pipe 7-3 are passed through No. two
Pvc pipe 7-2 inside thread and No. three pvc pipe 7-3 outside screws link together, and fill detonator 5 across each positioning
Set the U-shaped breach 11 of 2 one of semi-circular pipe clamp 10；
5) charge constitution after combination is put into blasthole, and aperture is blocked with plugging material 1, stemming length L2,
The variable diameters for completing periphery hole do not couple continuous charging radially.
Working principle：In use, pressing diameter ratio from bottom hole to aperture is 1.2：1：0.8, length ratio 1：1：1 selection
The pvc pipe 7 of three sections of same thickness, 7 diameter of pvc pipe being sequentially reduced by bottom hole to aperture, so that explosive payload is from bottom hole to aperture
It is sequentially reduced, since the clamping action for increasing rock with blast hole depth can gradually increase, this variable diameters charge constitution, energy
The effective rate of utilization for enough improving explosive, overcomes rock mass clamping action, and can cause centainly to destroy to the scope of freedom of subsequent cycle,
Lower the drilling difficulty of subsequent cycle；Selection internal diameter matches with 7 outer diameter of pvc pipe, outer diameter and the matched three kinds of semi-rings of blasthole diameter
Every kind of semi-circular pipe clamp 10, is uniformly mounted to the outside of matching pvc pipe 7 by shape pipe clamp 10 using multiple groups, and two and half
Annular pipe clamp 10 is mutually butted on the outside of pvc pipe 7, will firmly buckle 13 clamp 16 toward pushing away in groove 12, clamp 16 is subsequent
Spring 15 compresses in sliding cylinder 14, and after clamp 16 is completely into groove 12, the rebound of spring 15 and the reset of clamp 16 pass through card
10 clamping of semi-circular pipe clamp is fixedly secured in 7 outside of pvc pipe by button 13；In the basis rest detonator thunder of No.1 pvc pipe 7-1
Pipe 6, and gluey emulsion is loaded inside pvc pipe 7, No.1 pvc pipe 7-1 and No. two pvc pipe 7-2 are passed through into No.1 pvc pipe
7-1 inside thread and No. two pvc pipe 7-2 outside screws link together, and No. two pvc pipe 7-2 and No. three pvc pipe 7-3 are passed through
No. two pvc pipe 7-2 inside threads and No. three pvc pipe 7-3 outside screws link together, and then pass through detonator 5 each fixed
The U-shaped breach 11 of one of semi-circular pipe clamp 10 of position device 2；Charge constitution after combination is put into blasthole, and with blocking
Material 1 blocks aperture, and the variable diameters for completing periphery hole do not couple continuous charging radially.The present invention is continuous using variable diameters
Charge constitution, and in 4 outside mounting and positioning device 2 of variable diameters cartridge, continuous charging improve on axial direction powder charge section with
Powder stick in blasthole can be located on blasthole center line by the situation of the Energy distribution unevenness of airspace section, positioning device 2,
It can prevent explosive from directly contacting with hole wall, explosive energy is uniformly distributed in the radial direction in powder stick after explosive charge, thus
It avoids and excess destruction is caused to the part of hole wall, improve the flatness of surrounding rock stability and outline excavation face.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited merely to
This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention
And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of variable diameters are radially uniform not to couple continuous charging structure, including variable diameters cartridge, positioning device, detonator thunder
Pipe and emulsion, the variable diameters cartridge are formed by connecting by the pvc pipe of different-diameter, the outside of the variable diameters cartridge
It is fixed with positioning device, the variable diameters cartridge basis rest has Nonel detonator, filling inside the variable diameters cartridge
There is emulsion.
2. a kind of variable diameters according to claim 1 are radially uniform not to couple continuous charging structure, it is characterised in that：It is described
Pvc pipe is by the sequence from bottom hole to aperture, diameter ratio 1.2：1：0.8, length ratio 1：1：1, the pvc pipe thickness phase
Together, the both ends of the pvc pipe are respectively equipped with inside thread and outside screw, and the pvc pipe passes through inside thread and outside screw
It is attached, by the sequence from bottom hole to aperture, the inside thread of No.1 pvc pipe matches with No. two pvc pipe outside screws, and two
The inside thread of number pvc pipe matches with No. three pvc pipe outside screws.
3. a kind of variable diameters according to claim 1 are radially uniform not to couple continuous charging structure, it is characterised in that：It is described
Positioning device includes two semi-circular pipe clamps, and the semi-circular pipe clamp internal diameter is matched with pvc pipe outer diameter, outside the semi-circular pipe clamp
Diameter is matched with blasthole diameter, and the joint of the semi-circular pipe clamp is fluted and buckle, the groove match with buckle size,
The buckle includes sliding cylinder, spring and clamp, and the spring one end is fixed on inside sliding cylinder, and the spring other end is fixed
There is clamp.
4. a kind of variable diameters according to claim 3 are radially uniform not to couple continuous charging structure, it is characterised in that：It is described
It is provided with U-shaped breach on the outside of semi-circular pipe clamp, the U-shaped breach has detonator to pass through.
5. a kind of variable diameters according to claim 1 are radially uniform not to couple continuous charging structure, it is characterised in that：It is described
Emulsion is gluey emulsion.
6. a kind of variable diameters according to claim 1 are radially uniform not to couple continuous charging structure, it is characterised in that：It is described
Positioning device is uniformly mounted on the outside of pvc pipe using multiple groups.
7. the radially uniform loading method for not coupling continuous charging structure of variable diameters according to claim 1, feature exist
In：The method is applied in periphery hole control explosion, and described method includes following steps：
1) periphery hole that diameter is D, depth is L is drilled out along outline excavation, loaded length L is determined according to rock and orographic condition1With
And stemming length L2；
It 2) is 1.2 by the sequence diameter ratio of bottom hole to aperture：1：0.8, length ratio 1：1：1 three sections of pvc pipes of selection, respectively
For No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes, the outer diameter of No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes in proportion according to
Secondary reduce is respectively D1、D2、D3, total length, which is equal to, designs loaded length L1；
3) according to the outer diameter D of No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes1、D2、D3, select internal diameter for D1、D2、D3, outer diameter
With the matched three kinds of semi-circular pipe clamps of blasthole diameter D, every kind of semi-circular pipe clamp is uniformly mounted on to matching No.1 PVC
The outside of pipe, No. two pvc pipes and No. three pvc pipes, two return bends are stuck on the outside of pvc pipe and are mutually butted, firmly by buckle
Toward pushing away in groove, the subsequent spring of clamp compresses clamp in sliding cylinder, after clamp is completely into groove, springback and card
Head resets, and by buckling semi-circular pipe clamp clamping, is fixedly secured on the outside of pvc pipe.
4) in the basis rest Nonel detonator of No.1 pvc pipe, and inside No.1 pvc pipe, No. two pvc pipes and No. three pvc pipes
Gluey emulsion is loaded, No.1 pvc pipe and No. two pvc pipes are passed through into spiral shell on the outside of No.1 pvc pipe inside thread and No. two pvc pipes
Line links together, and No. two pvc pipes and No. three pvc pipes are connected by No. two pvc pipe inside threads and No. three pvc pipe outside screws
It is connected together, detonator is then made to pass through the U-shaped breach of one of semi-circular pipe clamp of each positioning device；
5) variable diameters cartridge is put into blasthole, and then aperture is blocked with plugging material, stemming length L2, complete week
Lateral opening variable diameters do not couple continuous charging radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734570.1A CN108917507A (en) | 2018-07-06 | 2018-07-06 | A kind of variable diameters are radially uniform not to couple continuous charging structure and its loading method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734570.1A CN108917507A (en) | 2018-07-06 | 2018-07-06 | A kind of variable diameters are radially uniform not to couple continuous charging structure and its loading method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764782A (en) * | 2019-03-14 | 2019-05-17 | 中交隧道工程局有限公司 | A kind of fine blasting technique of smooth surface based on pre-powder charge |
| CN110130674A (en) * | 2019-06-28 | 2019-08-16 | 绍兴文理学院 | A kind of pre-buried broken aperture apparatus of the super large of static crushing and its application method |
| CN110657722A (en) * | 2019-09-25 | 2020-01-07 | 昆明理工大学 | Hole-by-hole initiation method for complex environment foundation pit excavation |
| 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 |
| CN113959284A (en) * | 2021-09-30 | 2022-01-21 | 宏大爆破工程集团有限责任公司 | Step blasting method for reducing sand aggregate mine fines |
| CN114838636A (en) * | 2022-05-11 | 2022-08-02 | 中国葛洲坝集团易普力股份有限公司 | On-site mixed emulsion explosive loading device and method for tunnel peripheral holes |
| CN114894056A (en) * | 2022-05-11 | 2022-08-12 | 中国葛洲坝集团易普力股份有限公司 | Presplitting blasting rapid charging device and charging method |
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| CN205919746U (en) * | 2016-08-08 | 2017-02-01 | 鞍钢集团矿业有限公司 | Not coupling of variable diameter presplitting charging means |
| CN107024157A (en) * | 2017-05-22 | 2017-08-08 | 贵州大学 | A kind of blast charging structure and application method |
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| US5798477A (en) * | 1996-12-18 | 1998-08-25 | Givens; Richard W. | Explosive cartridge assembly for presplitting rock |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764782A (en) * | 2019-03-14 | 2019-05-17 | 中交隧道工程局有限公司 | A kind of fine blasting technique of smooth surface based on pre-powder charge |
| CN109764782B (en) * | 2019-03-14 | 2021-03-02 | 中交隧道工程局有限公司 | Smooth surface fine blasting method based on pre-charging |
| CN110130674A (en) * | 2019-06-28 | 2019-08-16 | 绍兴文理学院 | A kind of pre-buried broken aperture apparatus of the super large of static crushing and its application method |
| CN110657722A (en) * | 2019-09-25 | 2020-01-07 | 昆明理工大学 | Hole-by-hole initiation method for complex environment foundation pit excavation |
| 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 |
| CN113959284A (en) * | 2021-09-30 | 2022-01-21 | 宏大爆破工程集团有限责任公司 | Step blasting method for reducing sand aggregate mine fines |
| CN114838636A (en) * | 2022-05-11 | 2022-08-02 | 中国葛洲坝集团易普力股份有限公司 | On-site mixed emulsion explosive loading device and method for tunnel peripheral holes |
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Application publication date: 20181130 |