CN106839909A - Reduce the multidirectional collision cumulative multipoint priming method of the quick-fried foundation of deep hole step - Google Patents
Reduce the multidirectional collision cumulative multipoint priming method of the quick-fried foundation of deep hole step Download PDFInfo
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- CN106839909A CN106839909A CN201710209890.0A CN201710209890A CN106839909A CN 106839909 A CN106839909 A CN 106839909A CN 201710209890 A CN201710209890 A CN 201710209890A CN 106839909 A CN106839909 A CN 106839909A
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- blasthole
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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
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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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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a kind of multidirectional collision cumulative multipoint priming method that can be effectively reduced Long-hole Bench Blasting foundation and improve demolition effect.The multidirectional collision cumulative multipoint priming method of the reduction quick-fried foundation of deep hole step involved in the present invention, it is characterised in that comprise the following steps：Powder charge step：Water bag is arranged in the bottom of bench blasting blasthole, continuous charging is carried out above water bag；Primacord deposition step：Many primacords are arranged in the powder stick both sides positioned at blasthole middle and lower part, primacord is connected on detonator, and aperture is blocked with stemming；And detonation step：Powder charge in blasthole is ignited by detonating capsule.
Description
Technical field
The invention belongs to blasting method field, and in particular to a kind of multidirectional collision that can reduce Long-hole Bench Blasting foundation
Cumulative multipoint priming method.
Background technology
Long-hole Bench Blasting generally refer to opencut adopt on stripping step or on smooth soil to carry out drilling in advance quick-fried
Broken, the aperture of drilling is more than 50mm, and hole depth is more than 5m, and loads a kind of bursting work mode of extension pack in hole.With
The emergence of big-and-middle-sized drilling machine, Open Medium-depth Hole Bench Cut Blasting application is more and more extensive, has become power station aggregate and opens
Adopt the Main Means with mine oprn-work.But in actual Long-hole Bench Blasting, with the increase of blast hole depth, bottom hole rock
The clamping action that stone is subject to is increasing, causes demolition effect not good, and bench blasting foundation incidence is very high, causes to clear up foundation
It is big with secondary blasting workload, construction cost is both increased, the possibility that the abrasion and failure that equipment is increased again occur is unfavorable
In the safety of personnel equipment, what influence was produced is normally carried out.Therefore need the new blasting method of design to reduce methods of blasting toes in open, improve
Demolition effect.
The content of the invention
The present invention is carried out to solve above-mentioned problem, it is therefore intended that providing one kind can effectively reduce deep hole step
Methods of blasting toes in open and improve the multidirectional collision cumulative multipoint priming method of demolition effect.
The present invention to achieve these goals, employs following scheme.
The present invention provides a kind of multidirectional collision cumulative multipoint priming method for reducing the quick-fried foundation of deep hole step, and its feature exists
In comprising the following steps：Powder charge step：Water bag is arranged in the bottom of bench blasting blasthole, continuous charging is carried out above water bag,
Form powder stick；Primacord deposition step：Many primacords are arranged in the powder stick both sides positioned at blasthole middle and lower part, primacord is connected
Onto detonator, and aperture is blocked with stemming；And detonation step：Powder charge in blasthole is ignited by detonating capsule.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also wrap
Include：Drill process：Drilling depth is 10m, and bottom hole is backbreak, and depth of backbreaking is 1m.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also have
There is such feature：Wherein, water bag is made up of polythene material, and the gross thickness after dress water is 50cm, a length of 20-25cm, diameter
It is 20-30mm, filled water amount is the 90% of volume in water bag.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also have
There is such feature：Powder stick diameter=blasthole diameter-A, A is the arbitrary value in the range of 30~10mm.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also have
There is such feature：The total length of powder stick is more than 5m.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also have
There is such feature：Many primacords are evenly arranged in the both sides of powder stick.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also have
There is such feature：As a diameter of 50mm of powder stick, two primacords are arranged, powder stick diameter often increases 20mm~25mm, many cloth
Put a primacord.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also have
There is such feature：Detonator arrangement position to blasthole bottom hole distance be powder charge segment length 1/2~1/4.
The multidirectional collision cumulative multipoint priming method of reduction Long-hole Bench Blasting foundation involved in the present invention, can also have
There is such feature：Detonator arrangement position to blasthole bottom hole distance be powder charge segment length 1/3.
The effect of invention and effect
The present invention due to using above technical scheme, therefore compared with prior art, with advantages below：
(1) due to arranging many primacords in blasthole middle and lower part powder stick both sides, therefore, it is possible to collide cumulative using detonation wave
The blasting energy in cannon bottom hole portion, can just reduce or eliminate only by change detonation mode and using major diameter powder stick
Foundation, it is not necessary to secondary blasting is carried out to retained root bottom, demolition effect is improve；
(2) due to being mounted with water bag in bottom hole, therefore, it is possible to make full use of the compound of hydraulic fracturing and quick-fried raw gases at high pressure
Effect so that blasthole floor rocks are broken uniform, reach the effect for reducing foundation, meanwhile, the water in water bag can reduce explosion
The dust of generation, creates good construction efficiency；
(3) this programme only needs to change detonation mode, using major diameter powder stick, it is possible to the demolition effect for obtaining, into
This is low, easily operated, is suitable to large-scale promotion and uses.
Brief description of the drawings
Fig. 1 is the layout drawing of embodiment of the present invention medium-length hole step blasthole；
Fig. 2 is blast hole loading structure schematic diagram in the embodiment of the present invention；
Fig. 3 is the I-I sectional views of blast hole loading structure in the embodiment of the present invention, wherein, (a) is employed in embodiment one
A diameter of 76mm blastholes sectional view, (b) be embodiment two employed in a diameter of 90mm blastholes sectional view, (c) is
The sectional view of the diameter 105mm blastholes employed in embodiment three；
Fig. 4 is detonation wave collision Mohaupt effect schematic diagram one in the embodiment of the present invention one；And
Fig. 5 is detonation wave collision Mohaupt effect schematic diagram two in the embodiment of the present invention one.
In above-mentioned Fig. 1 to 5, each part numbers are as follows：
1. blasthole, 2. water bag, 3. powder charge section, 4. powder stick, 5. primacord, 6. detonator, 7. block section, 8. datum level, 9. quick-fried
The cumulative that Hong ripple, the 10. trajectory of the point of impingement, the direction of propagation of 11. detonation waves, 12. powder column walls, 13. detonation wave oblique impacts are produced
Air-flow, 14. blasthole walls, 15. rock mass.
Specific embodiment
Referring to the drawings to lighting the multidirectional collision cumulative of reduction Long-hole Bench Blasting foundation involved in the present invention more
Quick-fried method is elaborated.The part not elaborated in following examples belongs to prior art.
<Embodiment one>
Some hydropower station aggregate exploitation engineering, Long-hole Bench Blasting are, it is necessary to reduce methods of blasting toes in open, explosion is designed as：It is vertical to bore
Hole, drilling depth is 10m, and bottom hole is backbreak, and depth of backbreaking is 1m, and bore diameter is 76mm, and pitch of holes is 2.0~2.5m,
Using middle detonation mode.It is many using the multidirectional collision cumulative for reducing methods of blasting toes in open in the present embodiment one as shown in Fig. 1~3 (a)
The specific implementation step that point initiation method carries out explosion is as follows：
S1. drill process：
Artificial first or mechanical removal batholith surface coating, smooth location；
Then face is blown with high-pressure air hose, bench blasting blasthole 1 (3 blastholes 1 are only shown in Fig. 1) is hole-specifically put
Sample, point position is identified with red paint；
Then, the cloth hole of blasthole 1 is carried out in strict accordance with above-mentioned explosion design in quick-fried area；
After drilling terminates, the actual grade for measuring drilling fills out the fluffing of moulding sand or tiny the rubble grain of suitable thickness in blasthole bottom,
Make the bottom of all blastholes 1 all in same elevation；
S2. powder charge step：
One layer of water bag 2 is arranged in the bottom of blasthole 1, then continuous charging, shape is carried out using the top of water bag 2 as powder charge section 3
Into powder stick 4, the total length of powder stick 4 is more than 5m；
Here, the water bag 2 of use is made up of polythene material, a length of 20-25cm, a diameter of 20-30mm, in water bag 2
Filled water amount is the 90% of volume, and the gross thickness after dress water is 50cm；The total length of powder stick 4 is more than 5m, and powder stick diameter=blasthole is straight
Footpath-A, A are the arbitrary value in the range of 30~10mm, in the present embodiment one, a diameter of 50mm of powder stick；
S3. primacord deposition step：
Two primacords 5 are evenly arranged in the both sides of powder stick 4 positioned at the middle and lower part of blasthole 1, the end of primacord 5 is connected to
On detonator 6, and aperture is blocked with stemming, it is 2m to block the length of section 7；
Here, the position of the arrangement of detonator 6 to 1/2~1/4 that the distance of the bottom hole of blasthole 1 is powder charge 3 length of section, the present embodiment
Optimal proportion value 1/3 is used in one；
S4. detonate step：
After whole initiation net safety is confirmed, the powder charge in blasthole 1 is ignited by detonating capsule 6 so that middle and lower part
Powder stick 4 carries out multidirectional detonation by primacord 5, and remainder powder stick 4 is detonated by detonator 6, i.e., the powder stick 4 of datum level more than 8, under
Portion 1/3rd is detonated by primacord 5, and top 2/3rds is detonated by detonator 6.
After explosion completion, explosion flatness can be checked using relevant apparatus, observe foundation residual condition.The present embodiment
In one, by checking, it is found that catalase is uniform, explosion residual is obviously reduced, and flatness is preferable, without carrying out secondary construction,
Obtain good demolition effect.
As shown in Figures 4 and 5, after detonation, due to arranging two primacords 5 in the both sides of powder stick 4, therefore, it can using quick-fried
Hong ripple 9 collision cumulative increases output of the explosive energy to the bottom of blasthole 1.I.e., detonated by two symmetrical primacords 5, realize detonation
The collision in the plane of ripple 9, during collision, because the line of two primacords 5 is the diameter in explosive section, the physical arrangement of explosive
Uniformly, i.e., in any volume in explosive, its composition and density are all identicals, fine and close solid monomer explosive, so two row
First in the center of circle central collision of powder column section, as shown in Figure 4, lines 10 represent the trajectory of the point of impingement to detonation wave 9, and arrow 11 is represented
The direction of propagation of detonation wave 9, then do not collide place continue propagate, they after circle centre position central collision and then from the center of circle to
Continuously collision is gone down for both sides, and it is all oblique impact to cross the later collision in the center of circle, and after normal impact is converted into angular impact, detonation pressure gradually increases,
When angular impact incidence angle reaches certain value, Mach reflection is formed, detonation pressure is reached collision maximum, while energy centralization is existed
In the range of one very little, high-pressure area is formed, pressure and energy density at the point of impingement can be raised drastically, and detonation wave 9 is collided
Detonation pressure afterwards is that more than the twice of conventional steady detonation detonation pressure, the high pressure of the collision formation of detonation wave 9, high-energy-density gas are (quick-fried
Hong ripple oblique impact produce cumulative air-flow 13) jet to the both sides of powder column wall 12 project, substantially increase explosion to blasthole surrounding medium
Damage capability, therefore can improve the blasting energy of the bottom of blasthole 1 using the collision of detonation wave 9 Mohaupt effect, reduce step quick-fried
Broken foundation.
In addition, installed in the bottom of blasthole 1 water bag 2 as a kind of explosion and crushing assist medium, in explosion, in water bag 2
Liquid be subject to the strong effect of detonation wave 9 to produce great hydraulic pressure, act on blasthole wall 14, the rock mass 15 around blasthole 1 exists
Radial fissure is produced under detonation gas and hydraulic fracturing collective effect, rock mass 15 is broken uniform, simultaneously because in water transmission
Hit ripple incompressible to water, explosion energy without loss by Water transport to borehole country rock in, the stress of this noenergy loss
Ripple is advantageous to catalase, so as to improve the demolition effect of bottom hole rock.
Further, the blasting energy of the bottom of blasthole 1 can be increased using major diameter medicine, bottom there are enough blasting energies
To overcome the clamping action of rock, foundation is eliminated or reduced.
<Embodiment two>
Some hydropower station aggregate exploitation engineering, Long-hole Bench Blasting are, it is necessary to reduce methods of blasting toes in open, explosion is designed as：It is vertical to bore
Hole, drilling depth is 10m, and ultra-deep is 1m, and bore diameter is 90mm, and pitch of holes is 2.0~2.5m, using middle detonation mode.
As shown in Fig. 1,2 and 3 (b), carried out using the multidirectional collision cumulative multipoint priming method for reducing methods of blasting toes in open in the present embodiment two
The specific implementation step of explosion is as follows：
S1. drill process：
Artificial first or mechanical removal batholith surface coating, smooth location；
Then face is blown with high-pressure air hose, bench blasting blasthole 1 (3 blastholes 1 are only shown in Fig. 1) is hole-specifically put
Sample, point position is identified with red paint；
Then, the cloth hole of blasthole 1 is carried out in strict accordance with above-mentioned explosion design in quick-fried area；
After drilling terminates, the actual grade for measuring drilling fills out the fluffing of moulding sand or tiny the rubble grain of suitable thickness in blasthole bottom,
Make the bottom of all blastholes 1 all in same elevation；
S2. powder charge step：
One layer of water bag 2 is arranged in the bottom of blasthole 1, the gross thickness after dress water is 50cm；Then using the top of water bag 2 as dress
Medicine section 3 carries out continuous charging, forms powder stick 4, and the total length of powder stick 4 is more than 5m, a diameter of 70mm of powder stick；
S3. primacord deposition step：
Three primacords 5 (see 3 (b)) are evenly arranged in the both sides of powder stick 4 positioned at the middle and lower part of blasthole 1, by the end of primacord 5
End is connected on detonator 6, and blocks aperture with stemming, and it is 2m to block the length of section 7；
Here, the position of the arrangement of detonator 6 to 1/3 that the distance of the bottom hole of blasthole 1 is powder charge 3 length of section；
S4. detonate step：
After whole initiation net safety is confirmed, the powder charge in blasthole 1 is ignited by detonating capsule 6 so that middle and lower part
Powder stick 4 carries out multidirectional detonation by primacord 5, and remainder powder stick 4 is detonated by detonator 6, i.e., the powder stick 4 of datum level more than 8, under
Portion 1/3rd is detonated by primacord 5, and top 2/3rds is detonated by detonator 6.
In embodiment two, detonation wave collision Mohaupt effect principle is similar with embodiment one, repeats no more.
In the present embodiment two, by checking, it is found that catalase is uniform, explosion residual is obviously reduced, and flatness is preferable, nothing
Secondary construction need to be carried out, good demolition effect is equally obtained.
<Embodiment three>
Some hydropower station aggregate exploitation engineering, Long-hole Bench Blasting are, it is necessary to reduce methods of blasting toes in open, explosion is designed as：It is vertical to bore
Hole, drilling depth is 10m, and ultra-deep is 1m, and bore diameter is 105mm, and pitch of holes is 2.0~2.5m, using middle detonation mode.
As shown in Fig. 1,2 and 3 (c), carried out using the multidirectional collision cumulative multipoint priming method for reducing methods of blasting toes in open in the present embodiment three
The specific implementation step of explosion is as follows：
S1. drill process：
Artificial first or mechanical removal batholith surface coating, smooth location；
Then face is blown with high-pressure air hose, bench blasting blasthole 1 (3 blastholes 1 are only shown in Fig. 1) is hole-specifically put
Sample, point position is identified with red paint；
Then, the cloth hole of blasthole 1 is carried out in strict accordance with above-mentioned explosion design in quick-fried area；
After drilling terminates, the actual grade for measuring drilling fills out the fluffing of moulding sand or tiny the rubble grain of suitable thickness in blasthole bottom,
Make the bottom of all blastholes 1 all in same elevation；
S2. powder charge step：
One layer of water bag 2 is arranged in the bottom of blasthole 1, the gross thickness after dress water is 50cm；Then using the top of water bag 2 as dress
Medicine section 3 carries out continuous charging, forms powder stick 4, and the total length of powder stick 4 is more than 5m, a diameter of 90mm of powder stick；
S3. primacord deposition step：
Four primacords 5 (see 3 (c)) are evenly arranged in the both sides of powder stick 4 positioned at the middle and lower part of blasthole 1, by the end of primacord 5
End is connected on detonator 6, and blocks aperture with stemming, and it is 2m to block the length of section 7；
Here, the position of the arrangement of detonator 6 to 1/3 that the distance of the bottom hole of blasthole 1 is powder charge 3 length of section；
S4. detonate step：
After whole initiation net safety is confirmed, the powder charge in blasthole 1 is ignited by detonating capsule 6 so that middle and lower part
Powder stick 4 carries out multidirectional detonation by primacord 5, and remainder powder stick 4 is detonated by detonator 6, i.e., the powder stick 4 of datum level more than 8, under
Portion 1/3rd is detonated by primacord 5, and top 2/3rds is detonated by detonator 6.
In embodiment three, detonation wave collision Mohaupt effect principle is similar with embodiment one, repeats no more.
In the present embodiment three, by checking, it is found that catalase is uniform, explosion residual is obviously reduced, and flatness is preferable, nothing
Secondary construction need to be carried out, good demolition effect is also obtain.
Three above embodiment is only the illustration done to technical solution of the present invention.Reduction involved in the present invention
The multidirectional collision cumulative multipoint priming method of Long-hole Bench Blasting foundation is not merely defined in described in the embodiment above
Structure, but be defined by claim limited range.Those skilled in the art of the invention are on the basis of the embodiment
On any modification for being made or supplement or equivalence replacement, all in scope of the present invention.
Claims (9)
1. a kind of multidirectional collision cumulative multipoint priming method for reducing the quick-fried foundation of deep hole step, it is characterised in that including following step
Suddenly：
Powder charge step：Water bag is arranged in the bottom of bench blasting blasthole, continuous charging is carried out above water bag, form powder stick；
Primacord deposition step：Many primacords are arranged in the powder stick both sides positioned at the blasthole middle and lower part, is led described
Quick-fried rope is connected on detonator, and blocks aperture with stemming；And
Detonation step：Powder charge in blasthole is ignited by detonating capsule.
2. the multidirectional collision cumulative multipoint priming method for reducing Long-hole Bench Blasting foundation according to claim 1, it is special
Levy and be, also include：
Drill process：Drilling depth is 10m, and bottom hole is backbreak, and depth of backbreaking is 1m.
3. the multidirectional collision cumulative multipoint priming method for reducing Long-hole Bench Blasting foundation according to claim 1, it is special
Levy and be：
Wherein, the water bag is made up of polythene material, and the gross thickness after dress water is 50cm, a length of 20-25cm, a diameter of 20-
30mm,
Filled water amount is the 90% of volume in the water bag.
4. the multidirectional collision cumulative multipoint priming method for reducing Long-hole Bench Blasting foundation according to claim 1, it is special
Levy and be：
Wherein, powder stick diameter=blasthole diameter-A, A is the arbitrary value in the range of 30~10mm.
5. the multidirectional collision cumulative multipoint priming method for reducing Long-hole Bench Blasting foundation according to claim 1, it is special
Levy and be：
Wherein, the total length of the powder stick is more than 5m.
6. the multidirectional collision cumulative multipoint priming method for reducing Long-hole Bench Blasting foundation according to claim 1, it is special
Levy and be：
Wherein, many primacords are evenly arranged in the both sides of the powder stick.
7. the multidirectional collision cumulative multipoint priming method of the reduction Long-hole Bench Blasting foundation stated according to claim 6, its feature
It is：
Wherein, as a diameter of 50mm of powder stick, two primacords are arranged, the powder stick diameter often increases 20mm~25mm,
Arrange a primacord more.
8. the multidirectional collision cumulative multipoint priming method for reducing Long-hole Bench Blasting foundation according to claim 1, it is special
Levy and be：
Wherein, the position of detonator arrangement to the distance of blasthole bottom hole be the 1/2~1/4 of powder charge segment length.
9. the multidirectional collision cumulative multipoint priming method for reducing Long-hole Bench Blasting foundation according to claim 1, it is special
Levy and be：
Wherein, the position of detonator arrangement to the distance of blasthole bottom hole be the 1/3 of powder charge segment length.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710209890.0A CN106839909B (en) | 2017-03-31 | 2017-03-31 | Reduce the multidirectional collision cumulative multipoint priming method of Long-hole Bench Blasting foundation |
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| CN201710209890.0A CN106839909B (en) | 2017-03-31 | 2017-03-31 | Reduce the multidirectional collision cumulative multipoint priming method of Long-hole Bench Blasting foundation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174031A (en) * | 2019-05-16 | 2019-08-27 | 山东科技大学 | A kind of device overcoming methods of blasting toes in open |
| CN112097577A (en) * | 2020-06-04 | 2020-12-18 | 福建省新华都工程有限责任公司 | Slope control blasting method near end |
| CN112729035A (en) * | 2020-12-25 | 2021-04-30 | 上海二十冶建设有限公司 | Integral static blasting device for relatively complete rock stratum and construction method thereof |
| CN114923386A (en) * | 2022-04-19 | 2022-08-19 | 武汉理工大学 | Water-proof charging device and method in hole suitable for underwater blasting |
| CN115493460A (en) * | 2022-09-27 | 2022-12-20 | 安徽理工大学 | Charging structure and charging method for improving synergistic blasting effect by using energy gathering device |
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| CN104713432A (en) * | 2015-04-09 | 2015-06-17 | 大连理工大学 | Blasting method employing detonation wave energy collection |
| CN106225617A (en) * | 2016-08-09 | 2016-12-14 | 武汉大学 | A kind of rock-burst prevention method based on quick-fried rammer hydrofracturing |
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| US4313380A (en) * | 1978-09-15 | 1982-02-02 | Standard Oil Company (Indiana) | Distributed charge for seismic prospecting |
| CN1357672A (en) * | 2000-12-06 | 2002-07-10 | 中国科学技术大学 | Explosive forming process of underground fixed-wall reservoir |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174031A (en) * | 2019-05-16 | 2019-08-27 | 山东科技大学 | A kind of device overcoming methods of blasting toes in open |
| CN110174031B (en) * | 2019-05-16 | 2021-12-28 | 山东科技大学 | Device for overcoming blasting root |
| CN112097577A (en) * | 2020-06-04 | 2020-12-18 | 福建省新华都工程有限责任公司 | Slope control blasting method near end |
| CN112097577B (en) * | 2020-06-04 | 2023-01-03 | 福建省新华都工程有限责任公司 | Slope control blasting method near end |
| CN112729035A (en) * | 2020-12-25 | 2021-04-30 | 上海二十冶建设有限公司 | Integral static blasting device for relatively complete rock stratum and construction method thereof |
| CN112729035B (en) * | 2020-12-25 | 2023-02-28 | 上海二十冶建设有限公司 | Integral static blasting device for relatively complete rock stratum and construction method thereof |
| CN114923386A (en) * | 2022-04-19 | 2022-08-19 | 武汉理工大学 | Water-proof charging device and method in hole suitable for underwater blasting |
| CN115493460A (en) * | 2022-09-27 | 2022-12-20 | 安徽理工大学 | Charging structure and charging method for improving synergistic blasting effect by using energy gathering device |
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| Publication number | Publication date |
|---|---|
| CN106839909B (en) | 2018-09-07 |
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