CN206670474U - A kind of blasting arrangement of the efficiently explosion of demolition set - Google Patents
A kind of blasting arrangement of the efficiently explosion of demolition set Download PDFInfo
- Publication number
- CN206670474U CN206670474U CN201720041112.0U CN201720041112U CN206670474U CN 206670474 U CN206670474 U CN 206670474U CN 201720041112 U CN201720041112 U CN 201720041112U CN 206670474 U CN206670474 U CN 206670474U
- Authority
- CN
- China
- Prior art keywords
- level
- explosion
- main body
- explosive
- demolition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004880 explosion Methods 0.000 title claims abstract description 77
- 238000005422 blasting Methods 0.000 title claims abstract description 34
- 239000002360 explosive Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 34
- 239000003814 drug Substances 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 230000001186 cumulative effect Effects 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000002955 isolation Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 241000282470 Canis latrans Species 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 14
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 15
- 239000003245 coal Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000750 progressive effect Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The utility model discloses a kind of blasting arrangement of the efficiently explosion of demolition set, geology part including required explosion, main armament hole is set on the geology part of required explosion, attached blasthole is set gradually around main armament hole, the explosive in main armament hole, demolition set is set in attached blasthole, and main armament hole and attached series hole connection are got up successively by exploding wire, the utility model mainly utilizes short-delay blasting, play bottom blasting technique, water spacer blasting technique is designed, reduce blasting vibration, reduce bulk amount, reduce explosive specific charge amount and the concentration of dust, increase the utilization rate of borehole, increase demolition effect, with shotfiring safety.
Description
Technical field
Blasting technique field is the utility model is related to, especially a kind of blasting arrangement of the efficiently explosion of demolition set.
Background technology
At present, during the tunnel construction in China, mechanical drivage does not have large-scale use also, does not reach flourishing horizontal,
Blasting technique especially drilling and blasting method is the major way of China's tunnel construction, but the utilization rate of borehole is low in the driving in tunnel,
Demolition effect unobvious, low wait a moment of tunnelling footage efficiency is main difficulty, and difficulty of construction is very big.
The mine of complex geologic conditions is particularly in the process of coal mining in China, digging laneway and seam mining constantly pass through
Rock mass and the coal seam of special thickness can be often run into, because existing demolition set explosive energy utilization rate is low, blast hole utilization factor is low to wait single
Explosion makes the tunnelling footage in tunnel slow with progress, and demolition effect is poor, and the explosive of blasthole bottom is made to the rock mass in axial deep
Into action effect unobvious, it is impossible to further improve tunneling process in depth.The synthesis of the other hard thick gas top coal layer of spy
In exploitation, the stress how allowed in coal seam redistributes, and makes to form crack in coal seam, improves the methane drainage and utilization project rate of gas, subtract
Few production cost.
Utility model content
Technical problem to be solved in the utility model is：A kind of blasting arrangement of the efficiently explosion of demolition set is provided,
Low to solve the blast hole utilization factor of existing demolition set, demolition effect is poor.
What the utility model was realized in：
A kind of blasting arrangement of the efficiently explosion of demolition set, include the geology part of required explosion, in required explosion
Main armament hole is set on geology part, attached blasthole is set gradually around main armament hole, the explosive in main armament hole, in attached big gun
Demolition set is set in hole, and main armament hole and attached series hole connection got up successively by exploding wire.
In a kind of foregoing efficiently blasting arrangement of the explosion of demolition set, the demolition set includes explosive cartridge, one-level
Explosion main body and two level explosion main body are sequentially arranged in explosive cartridge and before the afterbody of one-level explosion main body and two level explosion main body
Hold corresponding matching.
In a kind of foregoing efficiently blasting arrangement of the explosion of demolition set, the explosive cartridge is made of plastic material,
Both sides are double layer hollow structure, and hollow sandwich is vacuum during original state, and top is one layer of sealing plate, bottom blow-by and quick-fried
Internal thread is set on the inside of broken cylinder, water intaking valve is set in hollow sandwich bottom side, in hollow sandwich top side ventilating cover, unidirectionally
Pressure air outlet valve one end connects with ventilating cover, and the other end stretches out outside and connected with extraneous air by airway tube.
In a kind of foregoing efficiently blasting arrangement of the explosion of demolition set, the one-level explosion main body includes step of threads
Base, one-level exploding wire, one-level lead thunderclaps pipe, one-level medicine cover, steel pipe, rigidity isolation block, the first powder chamber and the first cumulative medicine
Post, two level explosion main body include two level threaded base, spring, striker, and two level is ignited detonator, and two level det-cord, be delayed explosive, and two
Level explosion main body cover and two level cumulative powder column, first powder chamber are located in the middle part of explosive cartridge, filled out in the first powder chamber
Full of the first cumulative powder column, step of threads base and the step of threads base explosive cartridge phase interworking are set in the first powder chamber bottom
Conjunction is tightened, and one-level medicine cover, one-level exploding wire one end connection one-level medicine cover are set in the first cumulative powder column, and the other end passes through one-level
Threaded base simultaneously stretches out explosive cartridge, and funnel shaped one-level medicine cover, outside dimension and the first explosive are set at the top of the first powder chamber
The consistent steel pipe in room along while withstand on one-level medicine cover along while on, in steel pipe set rigidity isolation block and this rigidly isolation block and one
Level medicine cover forms space one, and the two level explosion main body cover of bullet shaped is arranged in the middle part of explosive cartridge, in two level explosion main body cover
The interior full two level cumulative powder column of filling, two level threaded base, the two level threaded base bottom are set in two level explosion main body cover bottom
Face is held out against each other with steel pipe along side, and the two level threaded base, steel pipe and rigidity isolation block form space two, in two level cumulative medicine
Delay explosive is set in post, and interior setting two level is ignited detonator in the middle part of two level threaded base, the connection delay of two level det-cord one end
Explosive, other end connection two level are ignited detonator, set shallow slot in the two level threaded base that two level is ignited below detonator, and spring is horizontal
It is in across shallow slot and fixed, on spring striker is set and the striker and two level are ignited detonator vertical alignment, on the striker bottom
Hit plate less than two level threaded base bottom surface and in the space two.
In a kind of foregoing efficiently blasting arrangement of the explosion of demolition set, chuck is set in steel pipe inside middle portion and is somebody's turn to do
Rigidity isolation block upper end avoids rigidly completely cutting off block movement during inoperative with chuck clamping, improves security.
By adopting the above-described technical solution, compared with prior art, the utility model mainly utilizes short-delay blasting,
Play bottom blasting technique, water spacer blasting technique is designed, and reduces blasting vibration, reduces bulk amount, reduce explosive specific charge amount and
The concentration of dust, the utilization rate of borehole is increased, increase demolition effect, and shotfiring safety.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model；
Accompanying drawing 2 is the structural representation of the utility model borehole blasting device；
Accompanying drawing 3 is operation chart when the utility model borehole blasting device is arranged on attached blasthole.
Embodiment
Embodiment of the present utility model：A kind of blasting method of the efficiently explosion of demolition set, this method pass through drilling point
Not Xing Cheng explosion main armament hole and attached blasthole, the attached blasthole is arranged on around explosion main armament hole, and abundance is put into main armament hole
Explosive, place demolition set in attached blasthole, using short-delay blasting, make main armament hole elder generation's detonation in rock around
Body, demolition effect can be produced to deep rock mass, that is, produce rock-mass relaxing, crackle and change of stress field, it is then attached around main armament hole
Category blasthole is detonated successively, can be completed by the two level explosion main body of demolition set in attached blasthole axially in progressive deep rock mass
Blasting work.
Wherein the main armament hole depth is more than attached blast hole depth, and general main borehole depth can be more than 2/3 two level explosion master
The length of phosphor bodies, it can also be calculated according to specific project situation to determine the depth of the dosage of explosion main body explosive and borehole
Size is spent, the method for ignition by placing demolition set in attached blasthole is the one-level explosion master by being arranged in demolition set
Body carries out initial explosion, makes crack occurs in rock mass, rock loosens etc., and one-level explosion main body produces huge Explosive impact ripple effect simultaneously
Promote the two level explosion main body for being close to one-level explosion body tail section and being arranged in demolition set is progressive to pierce in deep rock mass,
Under the effect of delay explosive (18), the subsequent explosion of Millisecond delay is produced.
A kind of blasting arrangement of the efficiently explosion of demolition set formed according to the above method, as shown in drawings, including
The geology part 25 of required explosion, main armament hole 26 is set on the geology part 25 of required explosion, around main armament hole 26 successively
Attached blasthole 23 is set, the explosive 27 in main armament hole 26, demolition set 28 is set in attached blasthole 23, and pass through ignition
Main armament hole 26 and attached blasthole 23 are together in series by line 29 successively.
Wherein the demolition set 28 includes explosive cartridge 21, and one-level explosion main body and two level explosion main body are sequentially arranged at explosion
In cylinder 21 and one-level explosion main body afterbodys and two level explosion body front end corresponding matching.
The explosive cartridge 21 is made of plastic material, and both sides are double layer hollow structure, and hollow sandwich is true during original state
Sky, top are one layer of sealing plate, bottom blow-by and the setting internal thread on the inside of explosive cartridge 21, are set in hollow sandwich bottom side
Water intaking valve 7 is put, the ventilating cover 9 in hollow sandwich top side, the one end of uniaxial pressure air outlet valve 8 connects with ventilating cover 9, and the other end leads to
Cross airway tube 11 to stretch out outside and connect with extraneous air, the one-level explosion main body includes step of threads base 1, one-level exploding wire
2, one-level leads thunderclaps pipe 3, one-level medicine cover 4, steel pipe 5, rigidity isolation block 6, the first powder chamber 10 and the first cumulative powder column 12, two level
Explosion main body includes two level threaded base 13, spring 14, striker 15, and two level is ignited detonator 16, and two level det-cord 17, be delayed explosive
18, two level explosion main body cover 19 and two level cumulative powder column 20, first powder chamber are located at positioned at the middle part of explosive cartridge 21, first
The full first cumulative powder column 12 of filling in powder chamber 10, step of threads base 1 and the one-level spiral shell are set in the bottom of the first powder chamber 10
The explosive cartridge 21 of line base 1 is cooperated and tightened, and one-level medicine cover 4, the one end of one-level exploding wire 2 are set in the first cumulative powder column (12)
One-level medicine cover 4 is connected, the other end is through step of threads base 1 and stretches out explosive cartridge 21, and leakage is set at the top of the first powder chamber 10
The one-level medicine cover 4 of bucket shape, the outside dimension steel pipe 5 consistent with the first powder chamber 10 along while withstand on one-level medicine cover 4 along while on,
Rigidity isolation block 6 is set in steel pipe 5 and the rigidity isolation block 6 forms space one, the two level explosion master of bullet shaped with one-level medicine cover 4
Body case 19 is arranged on the middle part of explosive cartridge 21, the full two level cumulative powder column 20 of filling in two level explosion main body cover 19, in two level
The bottom of explosion main body cover 19 sets two level threaded base 13, and the bottom surface of two level threaded base 13 is held out against each other with steel pipe 5 along side,
And the two level threaded base 13, steel pipe 5 and rigidity isolation block 6 form space two, set delay fried in two level cumulative powder column 20
Medicine 18, two level is set to ignite detonator 16 in the middle part of two level threaded base 13, the one end of two level det-cord 17 connection delay explosive 18,
Other end connection two level is ignited detonator 16, and shallow slot, spring are set in the two level threaded base 13 that two level is ignited below detonator 16
14 across in shallow slot and fixed, sets striker 15 on spring and the striker and two level are ignited the vertical alignment of detonator 16, this hits
Plate is hit less than the bottom surface of two level threaded base 13 and in space two on the bottom of pin 15, and in the inside middle portion of steel pipe 5, chuck is set
30 and the rigidity isolation upper end of block 6 and the clamping of chuck 30 avoid rigidly completely cutting off block 6 during inoperative and move.
When specifically used
The explosive of abundance is first put in main blast hole, attached blast hole is put into the present apparatus, and leading quick-fried lead with one connects
Come, make main armament hole first quick-fried using short-delay blasting, acting on surrounding rock body makes deep rock mass produce loosening, crack, change of stress field
Deng, then around attached blasthole detonate successively, time sequencing one<Two<Three<Four, the demolition effect of secondary blasthole and main armament hole
Effect is basically identical.It is small with dosage, the characteristics of demolition effect is good, and cost is low.
This demolition set is put into borehole, is pressed into water by one-way water inlet valve 7, is expanded explosive cartridge, until borehole is sealed
Close, break off air contact in drilling and extraneous, form water spacer explosion, light one-level exploding wire, cause in the first powder chamber
The blast of the one-level medicine cover of bottom, makes cumulative powder column be exploded since bottom, has produced the effect of bottom explosion；One-level explosion main body
Demolition effect and driving speed can be improved by quoting the principle of bottom hole explosion, and shotfiring safety increase, rock mass ambient side is by water
Detonation is coupled, hard force is uniformly distributed, and sillar is small and more uniform more rule, and demolition effect is good, while to surrounding rock body
Stress Field Distribution, rock mass structure produces great function, loosens and crack etc. is its performance.It is right after one-level explosion main body explosion
The certain action effect of rock mass, there is phenomena such as crack, loosening, the immense pressure of cavity blasting shock wave is in one-level medicine cover
Completely cut off with rigidity in the space one between block and propagated in medium (air), shock rushes it in rigidly completely cutting off block
The energy for hitting ripple is converted into the huge kinetic energy of isolation block.Isolation block can break through in steel pipe the kick for fixing initial position, and hit
Two level explosion main body is hit, is made in its progressive drilling crack or relaxed rockmass.Two level explosion main body has the screw thread of densification with base
Connection, base material are that plastic material plays a part of buffering, prevents two level explosion main body from being exploded immediately by collision deformation, because
Elementary errors is produced in the presence of delay explosive, subsequent explosion is carried out in the rock mass in deep, short-delay blasting effect is produced, can reduce and shake
Dynamic effect slungshot is reduced, and explosive energy utilization rate is high, and blast hole utilization factor is high and has effectiveness in vibration suppression.
The description of such scheme is the utility model for being understood that and using for ease of those skilled in the art,
Person skilled in the art obviously can easily make various modifications to embodiment, and therefore, the utility model is unlimited
In above-mentioned real scheme, those skilled in the art do not depart from what the utility model category was made according to method of the present utility model
Improve and modification all should be within the scope of protection of the utility model.
Claims (4)
1. a kind of blasting arrangement of the efficiently explosion of demolition set, include the geology part (25) of required explosion, it is characterised in that：
Main armament hole (26) are set on the geology part (25) of required explosion, attached blasthole is set gradually around main armament hole (26)
(23), in main armament hole (26) interior explosive (27), demolition set (28) is set in attached blasthole (23), and passes through exploding wire
(29) main armament hole (26) and attached blasthole (23) being together in series successively, the demolition set (28) includes explosive cartridge (21), and one
Level explosion main body and two level explosion main body are sequentially arranged in explosive cartridge (21) and the afterbody of one-level explosion main body and two level explosion
Body front end corresponding matching.
A kind of 2. blasting arrangement of efficiently explosion of demolition set according to claim 1, it is characterised in that：The explosion
Cylinder (21) is made of plastic material, and both sides be double layer hollow structure, and hollow sandwich is vacuum during original state, and top is one layer
Sealing plate, bottom blow-by and the setting internal thread on the inside of explosive cartridge (21), water intaking valve is set in hollow sandwich bottom side
(7), connected in hollow sandwich top side ventilating cover (9), uniaxial pressure air outlet valve (8) one end with ventilating cover (9), the other end leads to
Airway tube (11) is crossed to stretch out outside and connect with extraneous air.
A kind of 3. blasting arrangement of efficiently explosion of demolition set according to claim 1, it is characterised in that：The one-level
Explosion main body includes step of threads base (1), one-level exploding wire (2), and one-level leads thunderclaps pipe (3), one-level medicine cover (4), steel pipe
(5), rigidity isolation block (6), the first powder chamber (10) and the first cumulative powder column (12), two level explosion main body include two level screw thread bottom
Seat (13), spring (14), striker (15), two level are ignited detonator (16), two level det-cord (17), and delay explosive (18), two level is quick-fried
Broken main body cover (19) and two level cumulative powder column (20), first powder chamber is located in the middle part of explosive cartridge (21), fried first
The full first cumulative powder column (12) of filling in coyote hole (10), step of threads base (1) is set in the first powder chamber (10) bottom and is somebody's turn to do
Step of threads base (1) explosive cartridge (21) cooperates and tightened, the setting one-level medicine cover (4) in the first cumulative powder column (12), and one
Level exploding wire (2) one end connection one-level medicine cover (4), the other end is through step of threads base (1) and stretches out explosive cartridge (21), the
Funnel shaped one-level medicine cover (4) is set at the top of one powder chamber (10), outside dimension and the consistent steel pipe (5) of the first powder chamber (10)
Along while withstand on one-level medicine cover (4) along while on, rigidity isolation block (6) and the rigid isolation block (6) and one are set in the steel pipe (5)
Level medicine cover (4) forms space one, and the two level explosion main body cover (19) of bullet shaped is arranged in the middle part of explosive cartridge (21), in two level
The full two level cumulative powder column (20) of filling in explosion main body cover (19), two level spiral shell is set in two level explosion main body cover (19) bottom
Line base (13), two level threaded base (13) bottom surface are held out against each other with steel pipe (5) along side, and the two level threaded base (13),
Steel pipe (5) and rigidity isolation block (6) form space two, delay explosive (18) are set in two level cumulative powder column (20), in two level
Two level is set to ignite detonator (16) in the middle part of threaded base (13), two level det-cord (17) one end connection delay explosive (18), separately
One end connection two level is ignited detonator (16), and shallow slot is set in the two level threaded base (13) that two level is ignited below detonator (16),
Spring (14) on spring sets striker (15) and the striker and the two level detonator (16) that ignites is vertical across in shallow slot and fixed
Align, plate is hit less than two level threaded base (13) bottom surface and in space two on striker (15) bottom.
A kind of 4. blasting arrangement of efficiently explosion of demolition set according to claim 3, it is characterised in that：In steel pipe
(5) inside middle portion chuck (30) is set and when rigidity isolation block (6) upper end and chuck (30) clamping avoid inoperative rigidly every
Exhausted block (6) is mobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720041112.0U CN206670474U (en) | 2017-01-13 | 2017-01-13 | A kind of blasting arrangement of the efficiently explosion of demolition set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720041112.0U CN206670474U (en) | 2017-01-13 | 2017-01-13 | A kind of blasting arrangement of the efficiently explosion of demolition set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206670474U true CN206670474U (en) | 2017-11-24 |
Family
ID=60378331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720041112.0U Expired - Fee Related CN206670474U (en) | 2017-01-13 | 2017-01-13 | A kind of blasting arrangement of the efficiently explosion of demolition set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206670474U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731560A (en) * | 2017-01-13 | 2018-11-02 | 贵州大学 | A kind of blasting arrangement of efficient demolition set |
-
2017
- 2017-01-13 CN CN201720041112.0U patent/CN206670474U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731560A (en) * | 2017-01-13 | 2018-11-02 | 贵州大学 | A kind of blasting arrangement of efficient demolition set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106839911B (en) | The blasting method of axial progressive secondary efficient demolition set and device | |
| CN101644156B (en) | Method for weakening coal-rock mass by hydraulic blasting and fracturing | |
| CN206670477U (en) | The axially demolition set of laddering secondary efficiently demolition set | |
| CN103195466A (en) | Directional water pressure blasting method for improving coal bed gas permeability | |
| CN101419040A (en) | Deep hole blasting method in large aperture composite undermine | |
| CN113898330A (en) | Horizontal well open hole section methane in-situ perforation, combustion, explosion and fracturing integrated device and method | |
| CN106197181B (en) | A kind of liquid explosives bottom hole air cushion method of ignition | |
| CN206670474U (en) | A kind of blasting arrangement of the efficiently explosion of demolition set | |
| Sazid et al. | Effective explosive energy utilization for engineering blasting–initial results of an inventive stemming plug, SPARSH | |
| CN106767208B (en) | A kind of blasting method and structure of efficient demolition set | |
| CN102927863B (en) | A kind of new method of total rock tunnel blasting construction | |
| CN111473701A (en) | Method suitable for advanced energy-gathering cracking blasting of high-stress ore body | |
| CN204082108U (en) | Double-deck shell case petroleum perforation charge | |
| CN102944147B (en) | Waterpower pressurization blasting method | |
| CN214950943U (en) | A all round hole loaded constitution for plain noodles control blasting | |
| CN104713432A (en) | Blasting method employing detonation wave energy collection | |
| CN104897015A (en) | Hole filling method by blasting | |
| CN106643308A (en) | Axial progressive secondary efficient blasting device and installation method | |
| CN209387892U (en) | A kind of novel artificial focus | |
| CN102305058B (en) | Novel synergistic shattering perforation series charging device | |
| CN220853348U (en) | Tunnel light blasthole charging structure | |
| CN110763093A (en) | DNA double helix type shooting and blasting integrated medium-length hole blasting device | |
| CN109556470A (en) | Coal mine thick and hard roof based on detonation wave collision Mohaupt effect is layered fracturing method | |
| CN215064142U (en) | Tunnel excavation blasting charging structure for small cross section | |
| CN212362982U (en) | Carbon dioxide phase change directional pressure release cracking device for tunneling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |