CN107860277A - A kind of deep hole blasting deformation charge device and its design method - Google Patents
A kind of deep hole blasting deformation charge device and its design method Download PDFInfo
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- CN107860277A CN107860277A CN201711407778.4A CN201711407778A CN107860277A CN 107860277 A CN107860277 A CN 107860277A CN 201711407778 A CN201711407778 A CN 201711407778A CN 107860277 A CN107860277 A CN 107860277A
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- 238000005422 blasting Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 13
- 150000001875 compounds Chemical class 0.000 claims abstract description 59
- 239000002360 explosive Substances 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000007665 sagging Methods 0.000 claims abstract description 7
- 239000000725 suspension Substances 0.000 claims description 18
- 238000012856 packing Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 230000006798 recombination Effects 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- 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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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention provides a kind of deep hole blasting deformation charge device and its design method, the device includes some legs and is arranged at the hinged disk of leg upper end, the fix bar set through disk body is provided with the middle part of the hinged disk, bottom of fixed is provided with loosing and tightening structure, on one of leg some hooks are provided with along leg length direction, compound elastic band is connected on the hook, the compound elastic band is made up of elastic threads and cord, cord is built in elastic threads, compound elastic band one end connects with being linked up with leg, one end is sagging through freedom after the loosing and tightening structure of bottom of fixed, compound elastic band bottom connecting shackle, for hanging explosive.The present apparatus reduces the labor intensity of workmen, improves loading rate, has saved powder charge cost.
Description
Technical field
The invention belongs to blasting technique field, and in particular to a kind of deep hole blasting deformation charge device and its design method.
Background technology
Blast hole projectile filling process is extremely important in deep hole blasting construction, directly affects the quality of demolition effect.Use at present
Finished cylinder shaped explosive charge is largely the bar shaped explosive charge of film packaging, and dynamiter directly loses the blasting charge in blasthole or using artificial
The blasting charge is hung in blasthole with cord.The former, the blasting charge is loading in blasthole from the presence of gravity, easily because blasthole is deeper
Cause explosive lapse rate excessive, so that explosive changes its performance by undue densification, and then changes blast hole loading structure, and
And explosive may be caused larger security risk to be present by from outer detonation；The latter by the blasting charge with lifting rope, it is necessary to manually hang in big gun
In hole, the blasting charge collides with blasthole inwall unavoidably during hanging in, and causes explosive bags burst, influences project progress and cleaning
Trouble, operating efficiency is low, and labor strength is big.Current existing explosion deformation charge device has many new thinkings, but is difficult to
Coordinate the relation of powder charge economy and applicability.
Patent No. CN205860893U " servicing unit of blast hole projectile filling in a kind of blast working ", it includes rotating dress
Put, lifting rope, drop hanger, rotary shaft, clamping plate, crank, support, stand tube, handle, first with drop hanger by explosive jacket when the device is implemented
Firmly, place into blasthole, then by tumbler, slowly discharge lifting rope, when explosive reaches precalculated position, then shake and hang
Rope, makes drop hanger depart from from the blasting charge, rotary motion device, lifting rope is pulled out drop hanger by blasthole.The device is relied on and manually shaken
Shake handle, loading rate is low, uses duration；Explosive reaches precalculated position by shaking lifting rope, drop hanger is departed from from the blasting charge, grasps
It is big to make difficulty, and explosive can not be accurately placed in predetermined charge positions.
Patent No. CN206488707U " servicing unit of blast hole projectile filling in a kind of blast working ", it includes load-bearing
It is face, headstock, recombination line, roller, cartridge, PLC, wheel, base, explosive cartridge, pressure sensor, baffle plate, automatically controlled
Switch, isochronous controller, synchronous motor, when the device is implemented, explosive is first rolled into the inside of cartridge, controlled by PLC
Device processed enables isochronous controller, and isochronous controller makes synchronous working machine work, now roller turn, the recombination line wound on roller
Release, make cartridge fall into explosion it is dynamic in, when cartridge reaches the bottom in explosion hole, the pressure sensor of cartridge bottom by
Force information back to PLC, now PLC withdraw the backing pin of electric-controlled switch same by pressure, pressure sensor
When by isochronous controller invert synchronous motor, roller withdraws recombination line, and cartridge rises, effect of the baffle plate in gravity
Under around hinge rotate down 90 °, explosive cartridge falls into the bottom in explosion hole, after cartridge is risen back into ground, replys baffle plate initial
State, electric-controlled switch is resetted by PLC, repeat above-mentioned powder charge and continue powder charge.The device uses critical constraints
In execution conditions, and device complex operation, bad adaptability, loading rate are low, cost is high.
Therefore, research and design one kind can significantly improve loading rate, reduce hand labor intensity, improve powder charge effect,
The deep hole blasting servicing unit of relatively low construction cost, to substitute the mode of existing filling powder stick, tool is of great significance.
The content of the invention
The problem of existing for prior art, the technical scheme that the present invention uses for solution problems of the prior art
It is as follows：
A kind of deep hole blasting deformation charge device, including some legs and the hinged disk for being arranged at leg upper end, its feature
It is：The fix bar set through disk body is provided with the middle part of the hinged disk, bottom of fixed is provided with loosing and tightening structure, one of branch
Some hooks are provided with along leg length direction on pin, compound elastic band are connected on the hook, the compound elastic band is by elastic
Band and cord composition, cord are built in elastic band, and compound elastic band one end connects with being linked up with leg, and one end passes through fix bar
Free sagging, compound elastic band bottom connecting shackle, for hanging explosive after the loosing and tightening structure of bottom.
The leg has three, and supporting construction is formed after being hinged with hinged disk, and leg bottom is provided with elastic expansion joint,
For adjusting leg length and supporting construction balance.
The elastic band is made from the material good, that toughness is good of elasticity, and width 10-50mm, the cord selects intensity
High, retractility difference material is made, and a diameter of 1-3mm, compound elastic strip length is according to elastic band stiffness factor and blast hole depth
It is determined that its length will meet：The blasting charge is driven in compound elastic band dropping process, and cord is tensioned and produces sufficiently large rush suddenly
Tension force is hit, to destroy packing explosive structure.
The loosing and tightening structure that the bottom of fixed is set includes one piece of flexible steel sheet and some trip bolts, and steel disc will be fixed
After bar and compound elastic band encircle clamping, realized and clamped using trip bolt, having for compound elastic band is controlled using loosing and tightening structure
Imitate action length.
The suspension hook can destroy explosive when the cord built in compound elastic band is tensioned suddenly and produces certain impact tension force
Packaging structure, the blasting charge is got rid of de- hook automatically and fall exactly in predetermined charge positions.
A kind of design method of deep hole blasting deformation charge device is as follows：
The determination method of compound elastic band effective length is as follows in the present apparatus：
Set the present apparatus applied to blast hole depth as S blasthole when, effective length is L when compound elastic band is freely sagging0
(the compound elastic band of lightweight and suspension hook are used, its gravity can be neglected, and be stretched so disregarding caused by compound elastic band deadweight and suspension hook weight
It is long), cord effective length is set as L in compound elastic band1If the blasting charge drives and fallen under compound elastic band away from a upper powder charge bag
During (if filling first pack, then for away from blasthole bottom) 1.0-1.5m, i.e., elastic band be stretched to cord it is isometric when, cord
Tensioning, formula (1) is obtained according to integral energy conservation is formed by compound elastic band, suspension hook, the blasting charge：
In formula：K is TPU elastic bands stiffness factor (N/m)；M is blasting charge quality (kg)；V is blasting charge when cord is tensioned
Speed (m/s)；G is acceleration of gravity (taking 9.8N/kg)；
Twice that reflection stress is incident stress is reflected to form in fixed end obtain formula (2) by stress wave
The ρ Cv (2) of σ=2
In formula：σ is cord snap tension (Pa) caused by tensioning suddenly；ρ C are the wave impedance (kgm of cord-2·s-1)；
V is explosive speed packet (m/s) when cord is tensioned；
When snap tension is more than packing explosive structure allowable stress σHoldWhen, blasting charge packaging structure destroys, by formula (2) basis
Packing explosive structure obtains allowable stress σHold, blasting charge minimum speed when cord tensioning is obtained under given cord material, bring into
Formula (1) obtains solution maximum and obtains (L1-L0) max, to ensure that the blasting charge is reached away from a upper powder charge bag (if filling first
Individual pack, then for away from blasthole bottom) 1.0-1.5m when the speed that has, sufficiently large tension force is produced when rope can be made to be tensioned suddenly
Packing explosive structure is destroyed, takes (L1-L0)<(L1-L0)max, and L1≈ S, L0Span be 0.4-1.5m, first in this scope
One initial L of middle selection0, verify whether to meet (L1-L0)<(L1-L0)max, this L if meeting0It is that compound elastic band is effectively long
Degree, if not satisfied, then increasing L0, until meeting (L1-L0)<(L1-L0)max。
The invention has the advantages that：
During the deep hole blasting deformation charge device powder charge, the blasting charge, by static release, drives compound pine under human assistance
Taut band falls, compound elastic when away from a upper powder charge bag (if filling first pack, for away from blasthole bottom) 1.0-1.5m
It is tensioned suddenly with built-in cord, the cord in elastic band produces snap tension, caused punching by relaxed state to tensioning state
The packing explosive structure that tension force effect tangles in the suspension hook and blasting charge connecting portion, destruction is hit, makes the blasting charge automatic
Get rid of de- hook and fall the labor intensity in predetermined charge positions, reducing workmen exactly, improve loading rate, save
Powder charge cost, is a kind of deep hole blasting deformation charge device easy to use.
Brief description of the drawings
Fig. 1 is apparatus of the present invention structural representation；
Wherein：1. leg, 2. hinged disks, 3. compound elastic bands, 4. cords, 5. fix bars, 6. elastic expansion joints, 7. hang
Hook, 8. hooks, 9. loosing and tightening structures.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail, such as Fig. 1
It is shown, a kind of deep hole blasting deformation charge device, including some legs 1 and the hinged disk 2 for being arranged at the upper end of leg 1, hinged disk 2
Middle part is provided with the fix bar 5 set through disk body, and the bottom of fix bar 5 is provided with loosing and tightening structure 9, along leg on one of leg 1
Length direction is provided with some hooks 8, and compound elastic band 3 is connected on hook 8, and compound elastic band 3 is made up of elastic band and cord 4,
Cord is built in elastic band, and compound one end of elastic band 3 is connected with hook 8 on leg, and one end is elastic through bottom of fixed
Free sagging, the compound bottom connecting shackle 7 of elastic band 3, for hanging explosive after structure 9.
Leg 2 has three, and supporting construction is formed after being hinged with hinged disk 2, and leg bottom is provided with elastic expansion joint 6,
For adjusting leg length and supporting construction balance.
The material good, that toughness is good of elastic band selection elasticity is made, width 10-50mm, the selection of the cord 4 intensity height,
The material of retractility difference is made, a diameter of 1-3mm, and the compound length of elastic band 3 is true according to elastic band stiffness factor and blast hole depth
Fixed, its length will meet：The blasting charge is driven in compound elastic band dropping process, and cord is tensioned and produces sufficiently large impact suddenly
Tension force, to destroy packing explosive structure.
The loosing and tightening structure 9 that the bottom of fix bar 5 is set includes one piece of flexible steel sheet and some trip bolts, and steel disc is by fix bar
5 and after compound elastic band encircles clamping, realized and clamped using trip bolt, having for compound elastic band 3 is controlled using loosing and tightening structure 9
Imitate action length.
Suspension hook 7 can destroy explosive when the cord 4 built in compound elastic band 3 is tensioned suddenly and produces certain impact tension force
Packaging structure, the blasting charge is got rid of de- hook automatically and fall exactly in predetermined charge positions.
A kind of design method of deep hole blasting deformation charge device is as follows：
(under free hang, compound elastic band presss from both sides the effective length of compound elastic band 3 from loosing and tightening structure 9 in the present apparatus
Position is held to the length of suspension hook 7) determination method it is as follows：
Set the present apparatus applied to blast hole depth as S blasthole when, effective length is L when the freedom of compound elastic band 3 is sagging0
(it can be neglected using the compound elastic band 3 of lightweight and drop hanger 7, its gravity, so disregarding caused by compound elastic band deadweight and suspension hook weight
Elongation), setting the effective length of cord 4 in compound elastic band 3, (cord 4 is since by the retaining part of loosing and tightening structure 9 to bottom suspension hook 7
Length) be L1If the blasting charge drives and fallen under compound elastic band 3 away from a upper powder charge bag (if filling first pack, then
For away from blasthole bottom) 1.0-1.5m when, i.e., elastic band be stretched to cord 4 it is isometric when, cord 4 is tensioned, according to by compound elastic
Band 3, suspension hook 7, the blasting charge form integral energy conservation and obtain formula (1)：
In formula：K is TPU elastic bands stiffness factor (N/m)；M is blasting charge quality (kg)；V is blasting charge when cord 4 is tensioned
Speed (m/s)；G is acceleration of gravity (taking 9.8N/kg)；
Twice that reflection stress is incident stress is reflected to form in fixed end obtain formula (2) by stress wave
The ρ Cv (2) of σ=2
In formula：σ is the snap tension (Pa) caused by tensioning suddenly of cord 4；ρ C are the wave impedance (kgm of cord 4-2·s-1)；V is explosive speed packet (m/s) when cord 4 is tensioned；
When snap tension is more than packing explosive structure allowable stress σHoldWhen, blasting charge packaging structure destroys, by formula (2) basis
Packing explosive structure obtains allowable stress σHold, blasting charge minimum speed when cord 4 is tensioned is obtained under given cord material, is brought into
Formula (1) obtains solution maximum and obtains (L1-L0) max, to ensure that the blasting charge is reached away from a upper powder charge bag (if filling first
Individual pack, then for away from blasthole bottom) 1.0-1.5m when the speed that has, sufficiently large tension force is produced when rope can be made to be tensioned suddenly
Packing explosive structure is destroyed, takes (L1-L0)<(L1-L0)max, and L1≈ S, L0Span be 0.4-1.5m, first in this scope
One initial L of middle selection0, verify whether to meet (L1-L0)<(L1-L0)max, this L if meeting0It is that compound elastic band 3 is effective
Length, if not satisfied, then increasing L0, until meeting (L1-L0)<(L1-L0)max。
Operation principle：When using patent device, the present apparatus is set up above blasthole first, by being carried out to leg 1
Adjustment makes suspension hook 7 be directed at blasthole, is easy to powder charge, compound elastic band 3 is determined according to the ratio of elongation of the depth of blasthole and elastic band
Length, including the length of cord 4 and the length of elastic band, the loosing and tightening structure 9 of the bottom of fix bar 5 is can adjust, makes compound elastic band 3
Effective interaction length (under free hang, compound elastic band is from the retaining part of loosing and tightening structure 9 to the length of suspension hook 7) meet
It is required that at this moment hanging over the blasting charge on suspension hook 7, the blasting charge, by static release, is driven under compound elastic band 3 under human assistance
Fall, when away from a upper powder charge bag (if filling first pack, for away from blasthole bottom) 1.0-1.5m, cord 4 is tensioned and produced
A raw sufficiently large snap tension, the snap tension act on suspension hook 7 and blasting charge connecting portion, destroy what suspension hook 7 tangled
The packaging structure of explosive, the blasting charge is set to get rid of de- suspension hook automatically and fall exactly in predetermined charge positions.
Protection scope of the present invention is not limited to the above embodiments, it is clear that those skilled in the art can be to this hair
It is bright to carry out various changes and deformation without departing from scope and spirit of the present invention.If these changes and deformation belong to power of the present invention
In the range of profit requirement and its equivalent technologies, then including the intent of the present invention is also changed and deformed comprising these.
Claims (6)
1. a kind of deep hole blasting deformation charge device, including some legs and the hinged disk for being arranged at leg upper end, its feature exist
In：The fix bar set through disk body is provided with the middle part of the hinged disk, bottom of fixed is provided with loosing and tightening structure, one of leg
On along leg length direction be provided with some hooks, compound elastic band is connected on the hook, the compound elastic band is by elastic band
Formed with cord, cord is built in elastic band, and compound elastic band one end connects with being linked up with leg, and one end passes through fix bar bottom
Free sagging, compound elastic band bottom connecting shackle, for hanging explosive after the loosing and tightening structure in portion.
A kind of 2. deep hole blasting deformation charge device as claimed in claim 1, it is characterised in that：The leg has three,
Supporting construction is formed after being hinged with hinged disk, leg bottom is provided with elastic expansion joint, is tied for adjusting leg length and support
Structure balances.
A kind of 3. deep hole blasting deformation charge device as claimed in claim 1, it is characterised in that：The elastic band is from elasticity
Material good, that toughness is good is made, and width 10-50mm, the cord is made from the material that intensity is high, retractility is poor, diameter
For 1-3mm.
A kind of 4. deep hole blasting deformation charge device as claimed in claim 1, it is characterised in that：The bottom of fixed is set
Loosing and tightening structure include one piece of flexible steel sheet and some trip bolts, after fix bar and compound elastic band are encircled clamping by steel disc,
Realized and clamped using trip bolt, the effective interaction length of compound elastic band is controlled using loosing and tightening structure.
A kind of 5. deep hole blasting deformation charge device as claimed in claim 1, it is characterised in that：The suspension hook is compound elastic
When being tensioned suddenly with built-in cord and producing certain impact tension force, packing explosive structure can be destroyed, the blasting charge is got rid of automatically de-
Link up with and fall exactly in predetermined charge positions.
6. a kind of design method of deep hole blasting deformation charge device as any one of claim 1-5, its feature exist
In：The determination method of compound elastic band effective length is as follows in described device：
Set the present apparatus applied to blast hole depth as S blasthole when, effective length is L when compound elastic band is freely sagging0, it is compound
Cord effective length is set in elastic band as L1If the blasting charge drive fallen under compound elastic band away from a upper powder charge bag (if
Fill first pack, then for away from blasthole bottom) 1.0-1.5m when, i.e., elastic band be stretched to cord it is isometric when, cord tensioning, root
Formula (1) is obtained according to integral energy conservation is formed by compound elastic band, suspension hook, the blasting charge：
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In formula：K is TPU elastic bands stiffness factor (N/m)；M is blasting charge quality (kg)；V is explosive speed packet when cord is tensioned
(m/s)；G is acceleration of gravity (taking 9.8N/kg)；
Twice that reflection stress is incident stress is reflected to form in fixed end obtain formula (2) by stress wave：
The ρ Cv (2) of σ=2
In formula：σ is cord snap tension (Pa) caused by tensioning suddenly；ρ C are the wave impedance (kgm of cord-2·s-1)；V is thin
Explosive speed packet (m/s) during rope tensioning；
When snap tension is more than packing explosive structure allowable stress σHoldWhen, blasting charge packaging structure destroys, by formula (2) according to explosive
Packaging structure obtains allowable stress σHold, blasting charge minimum speed when cord tensioning is obtained under given cord material, bring formula (1) into
Solve maximum and obtain (L1-L0) max, by (L1-L0)<(L1-L0)max, and L1≈ S, L0Span be 0.4-1.5m, in this model
Enclose one initial L of middle selection0, verify whether to meet (L1-L0)<(L1-L0)max, this L if meeting0It is having for compound elastic band
Length is imitated, if not satisfied, then increasing L0, until meeting (L1-L0)<(L1-L0)max。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711407778.4A CN107860277A (en) | 2017-12-22 | 2017-12-22 | A kind of deep hole blasting deformation charge device and its design method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711407778.4A CN107860277A (en) | 2017-12-22 | 2017-12-22 | A kind of deep hole blasting deformation charge device and its design method |
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| CN107860277A true CN107860277A (en) | 2018-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711407778.4A Pending CN107860277A (en) | 2017-12-22 | 2017-12-22 | A kind of deep hole blasting deformation charge device and its design method |
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| CN (1) | CN107860277A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811378A (en) * | 2020-07-07 | 2020-10-23 | 福建荣安爆破工程有限公司 | Blast hole measurement auxiliary equipment and use method thereof |
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| RU2232372C1 (en) * | 2002-12-24 | 2004-07-10 | Петровский Игорь Яковлевич | Device for charging of holes with running water on open pits by nonwater proof explosives and method for its use |
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| CN106595411A (en) * | 2017-01-20 | 2017-04-26 | 贵州大学 | Auxiliary device for charging blast hole with explosive during detonating construction |
| CN106813542A (en) * | 2017-03-27 | 2017-06-09 | 贵州大学 | The servicing unit of blast hole projectile filling in a kind of blast working |
| CN206601080U (en) * | 2017-03-06 | 2017-10-31 | 内蒙古康宁爆破有限责任公司 | Vertical blasting hole with water means for loading |
| CN107328326A (en) * | 2017-07-24 | 2017-11-07 | 武汉大学 | Underground borehole blasting outlining blasting loading method |
| CN107478115A (en) * | 2017-08-28 | 2017-12-15 | 安徽理工大学 | A kind of new blast hole projectile filling hooks rope |
| CN207703091U (en) * | 2017-12-22 | 2018-08-07 | 武汉大学 | A kind of deep hole blasting deformation charge device |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2232372C1 (en) * | 2002-12-24 | 2004-07-10 | Петровский Игорь Яковлевич | Device for charging of holes with running water on open pits by nonwater proof explosives and method for its use |
| CN205860893U (en) * | 2016-07-28 | 2017-01-04 | 江西国泰五洲爆破工程有限公司 | The auxiliary device of blast hole projectile filling in a kind of blast working |
| CN106225614A (en) * | 2016-08-22 | 2016-12-14 | 叶建军 | Umbrella shape screens hanger and utilize the umbrella shape screens hanger method to blast hole projectile filling |
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| CN107328326A (en) * | 2017-07-24 | 2017-11-07 | 武汉大学 | Underground borehole blasting outlining blasting loading method |
| CN107478115A (en) * | 2017-08-28 | 2017-12-15 | 安徽理工大学 | A kind of new blast hole projectile filling hooks rope |
| CN207703091U (en) * | 2017-12-22 | 2018-08-07 | 武汉大学 | A kind of deep hole blasting deformation charge device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811378A (en) * | 2020-07-07 | 2020-10-23 | 福建荣安爆破工程有限公司 | Blast hole measurement auxiliary equipment and use method thereof |
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