CN107228608B - The blasting method of rock directional splitting - Google Patents
The blasting method of rock directional splitting Download PDFInfo
- Publication number
- CN107228608B CN107228608B CN201710618876.6A CN201710618876A CN107228608B CN 107228608 B CN107228608 B CN 107228608B CN 201710618876 A CN201710618876 A CN 201710618876A CN 107228608 B CN107228608 B CN 107228608B
- Authority
- CN
- China
- Prior art keywords
- rock
- blasthole
- explosion
- blasting
- detonator
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of blasting methods of rock directional splitting, be intended to provide it is a kind of have rock can be made to be only oriented towards scheduled direction rupture and topple over, guarantee the blasting method of rock and rock directional splitting the advantages of surrounding safety in work progress, its key points of the technical solution are that, prepare including explosion, cloth hole drilling, detonator production, powder charge blocking, networking explosion and transport rubble, to adjust gradient and the position of blasthole, and the depth of gunpowder changes the toppling direction after rock blasting in blasthole, rock can be made only to rupture and topple over to safety zone side in blasting process, reduce a possibility that rock is at will in blasting process and dust splashes to road surface, guarantee that explosion makes the safety of surrounding, it also can be reduced the usage amount of explosive, increase the effect of explosion, a possibility that reducing miso-fire and the generation of blind big gun.
Description
Technical field
The present invention relates to rock blasting field, in particular to a kind of blasting method of rock directional splitting.
Background technique
Explosion is to be compressed, loosened caused by explosion in empty gas and water, native stone medium or object using explosive, destroyed, thrown
It throws and lethal effect, a special kind of skill to achieve the desired purpose.Pack or the powder charge explosion time in native stone medium or works, make soil
Stone medium or works generate the phenomenon that compression, deformation, destruction, loose and throwing, are mainly used for earth and rock works and metal
Building and the dismounting of structures etc..
In the heavy constructions such as railway, mine, reservoir, the critical function of blasting technique is critically important.What mining was repaired the roads opens
Mountain is holed, and dismounting of the city to old building can all use blasting technique.
Chinese Mountain Areas is more, in order to pull expanding economy, rock massif is needed to build highway, at this moment just needs massif is smooth
For level land, facilitate the construction of road, general massif can directly be dug with digging machine, still, faced rock massif, directly excavated bright
It shows unworkable, at this moment needs first to carry out rock blasting, could excavate.
Currently, the rock blasting that the Chinese patent of Publication No. CN104897016A discloses a kind of safe and efficient environmental protection is set
Standby, it includes demolition set and perforating device, and perforating device includes bracket and the air compressor machine and water tank that are arranged on bracket, pneumatics
Machine is connected with water tank by high-voltage tube, and water tank also passes through high-voltage tube and steel fibre is connected, and air compressor machine also passes through high-voltage tube and air inflating machine for dismantling tyre
Connection, the steel fibre are arranged on air inflating machine for dismantling tyre, and steel fibre is hollow body, and the tip of its drill bit is provided with water outlet.Above-mentioned patent
A kind of rock-blasting method of safe and efficient environmental protection is further related to, it includes position and the angle, brill blast hole, expansion of determining blast hole
Hole, explosion step.
Although the rock blasting equipment of this safe and efficient environmental protection and blasting method can be blown with less detonator, explosive
More rock guarantees that explosion worker is not polluted by dust, avoids safety accident to a certain extent, but this explosion
Method be commonly used in the explosion of massif, be the rock that explosion generation is reduced by beating inclined blast hole, it is most of quick-fried
The raw percussion of bankruptcy is absorbed by massif, and also belongs to safety zone backwards to the side of massif, therefore can reach safety blasting
Effect.
The existing one block rock for needing explosion, since its two sides soil layer is all hollowed out, rock side is safety zone, separately
Side is road surface, needs to guarantee that the stone generated when rock blasting ruptures and topples over towards safety zone side at this time, to protect
The safety for demonstrate,proving work progress and road surface side, is unable to reach this effect using above-mentioned blasting method.
Summary of the invention
The object of the present invention is to provide a kind of blasting methods of rock directional splitting, pre- with rock can be made to be only oriented towards
The advantages of fixed direction rupture and toppling over, guaranteeing rock and surrounding safety in work progress.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of blasting method of rock directional splitting, includes the following steps:
S1: explosion prepares, and according to topography and geomorphology situation, is purged to the rock surface vegetation for needing explosion, carries out big gun
The design in hole chooses suitable drilling machine, and drilling machine is transported to scene and is awaited orders, and is correspondingly arranged in several scheduled blasthole positions several
A working face and the good hole location of cloth；
S2: cloth hole drilling uses single eye cloth hole when cloth hole, and blasthole is tiltedly installed with several towards safety zone side,
Several blastholes are linearly arranged, and the straight line that blasthole is formed is extended from road surface to safety zone direction, blasthole diameter 90mm, spacing
For 0.8m~1.5m, blasthole is cleared up after the completion of drilling, it is ensured that rock powder is fully erased in hole；
S3: detonator production prepares several detonators and fuse cord, makes in andron, fuse cord one end is cut flat with together,
The other end is cut into angle, and fuse cord length is greater than 1.2m, then fuse cord is inserted into detonator, until the strengthening cap of detonator is contradicted, then
Detonator mouth is clamped and wrapped rubber bandage with joint pliers, checks the resistance and stability of every detonator；
S4: powder charge blocking, warning of clearing out a gathering place before powder charge, warning safe distance are greater than 400m, it is ensured that warning distance is in slungshot shadow
It rings outside area, transports detonator to work surface after the completion of withdrawing, temperature in the angle of detection hole, direction, structure, powder stick diameter and hole
Degree, it is ensured that temperature in borehole carries out the filling of detonator after being lower than 60 DEG C, guarantee that explosive is arranged along the high degree of dispersion of hole depth when filling, fire
For medicine fill depth from road surface side blasthole to safety zone side blasthole, depth is incremented by successively, and is blocked using filler；
S5: detonator is transported to formulation position and successively on line, guarantee is tied towards each fire point by operation by networking explosion
It closes position binding securely, blasting network is checked before detonating, measurement conducting wire is in energized state, carries out detonation operation, by close to peace
Gunpowder is successively ignited laterally closer road surface side by the whole district one, completes explosion；
S6: after confirmation explosion is normal, blown-out shot, blind big gun are handled in time, and the rubble generated after explosion and scrap are cleaned out
The directional blasting of rock is completed at scene.
By using above-mentioned technical proposal, if be not purged to rock surface vegetation, set off firecrackers Kong Shirong before explosion
Easily the position of blasthole, size and depth are had an impact, and influence final blasting result.It is also easy to produce in blasting process
Raw more flying dust and fragment, have an impact operator；
In position and the size for designing blasthole, it is necessary first to according to the size of rock, hardness and used detonator
Size determine the diameter of blasthole, the pitch-row and array pitch of blasthole are then calculated further according to blasthole diameter；
The present invention uses the blasthole diameter of 90mm；
The calculation formula of pitch-row are as follows: a=D/n(D is borehole diameter, and n=60~120 take larger when rock quality is hard
Value), gained pitch-row is 0.8m~1.5m；
The calculation formula of array pitch are as follows: b=(0.8~0.9) × D × KS(KSTake 25~45), final gained array pitch is 3~
3.5m；
After explosive detonates in blasthole, high temperature and high pressure gas impacts rapidly hole wall, when explosive detonation speed is more than hole wall rock
When the velocity of longitudinal wave of stone, shock wave will be generated in it；If it is less than velocity of longitudinal wave, then stress pulse is generated on hole wall, rush
It hits wave and profit pulse decays to stress wave and propagates outward；And high temperature and high pressure gas, after impacting hole wall, the energy of explosive is simultaneously
It does not completely disappear, generally still there is 50% energy to be retained in the gas that explosion generates, and act on hole wall；Therefore by big gun
Hole is obliquely installed, although can not stop the propagation of stress wave, can to a certain extent be stayed in the gas that explosion generates
In rock, and make its repeated action on rock inner wall, saved the dosage of explosive, also adds the effect of explosion；
Blasthole is arranged in a linear, and blasthole position extends from road surface to safety zone direction；In explosion, explosive is from safety
Area is successively ignited into the blasthole in road surface direction, and since safety zone direction has rock as barrier always, what explosion generated is rushed
It hits wave and can carry rubble dust and fly out towards safety zone side, it is not easy to which the side for influencing road surface ensure that road surface side
Safety；If there is rock powder in blasthole, when loading explosive, rock powder is readily mixed into explosive, so influence explosive initiation
Make the impact force generated, is also easy to cause miso-fire, blind big gun etc., it is possible to which the safety for jeopardizing operator also causes the wave of material
Take；
Angle is cut into one end of fuse cord, the other end is concordant, and one end of angle can be convenient operator for fuse cord
It injects in detonator；Pack tightly detonator mouth with rubber bandage, can to avoid detonator in storage, transport or installation process and fuse cord by
Tide, to avoid generating miso-fire and blind big gun；
It is necessary to ensure that in blasthole that temperature is normal before installation detonator, if temperature is excessively high, is easy the thunder that ignites during the installation process
Pipe, to generate explosion accident, injures operator；The fill depth of explosive from one side of road surface to safety zone side blasthole successively
It is incremented by, closer to safety zone side, dynamite charge depth is bigger；Inclined explosion can be generated in rock after the completion of such explosion
Notch, blasting gap size is successively decreased from one side of safety zone to road surface side, therefore rock top position is fallen under the effect of gravity
When, it can topple over towards the biggish side of blasting gap towards safety zone side, it will be able to be further reduced explosion road pavement one
The influence that side generates makes rock only rupture and topple over to safety zone side in blasting process, guarantees that explosion makes the safety of surrounding
Property；
Networking explosion needs to design initiation net, and initiation net can effectively control rupture side by control energy release
To and damage envelope, make rock reach in blasting process stablize, smooth design requirement；It needs when loading gunpowder using glutinous
Soil, sandstone etc. block blasthole, and sealing space can be so generated in blasthole, increase effect when gunpowder explosion to a certain extent
Fruit, moreover it is possible to stop extraneous dew to enter in blasthole, influence the demolition effect of gunpowder.
Further setting: the tilt angle of the blasthole is 10 °~20 °, and opening direction is arranged towards safety zone direction.
By using above-mentioned technical proposal, although blasthole inclination a setting can increase whole demolition effect, simultaneously
The tilt angle a of blasthole is set to 10 °~20 ° by the difficulty that will increase punching, on the one hand can be by the difficulty control of punching one
Determine in range, on the other hand can avoid the appearance of chongtian mortar to a certain extent, moreover it is possible to which air-flow is in rock after increasing explosion
The number of impact, to reach better demolition effect.
Further setting: in S2, rock mass is provided with isolation seam close to road surface side in advance, forms an acting surface, and blasthole is located at
Isolation is stitched far from road surface side.
By using above-mentioned technical proposal, be isolated slit at acting surface can separate harm of the explosion to part is retained,
Prevent the broken of rupture portion rock stratum, displacement and deform to generate destruction to reservation part；Simultaneously, it is ensured that form orientation after explosion and fall
The trend collapsed.
Further setting: the width that seam is isolated is more than or equal to 60mm.
By using above-mentioned technical proposal, the width that seam is isolated is not less than the 2/3 of blasthole diameter, damage when controlling explosion
Retain part.
Further setting: in S4, gunpowder fill depth is the 1/8~1/2 of blast hole depth.
By using above-mentioned technical proposal, explosive payload is excessive, not only causes the waste of gunpowder, destruction that can also be different degrees of
The stability of rock stratum, causes rock stratum excessively to crush, and brings security risk；Powder charge is very few, then the effect of directional blasting is not achieved.
Further setting: in S4, gunpowder fill depth is linear from road surface side blasthole to safety zone side blast hole depth
It is incremented by, forms blasting with trapezoidal notch.
By using above-mentioned technical proposal, the setting of blasting with trapezoidal notch blow up gunpowder generation energy obtain rationally
Even utilization generates shock wave to rock stratum, destroys strata structure, make strata structure center of gravity unstability, smoothly in the effect of self weight
Lower formation tilting moment, forces rock stratum to be collapsed towards safe floor.
Further setting: in S4, before gunpowder filling, flexible cushion is set in each blast hole bottom, gunpowder is placed in flexibility
On bed course, gunpowder is filled after having loaded by fine sand, clay and rubble powder.
By using above-mentioned technical proposal, the design of flexible cushion thickness can make during blast working, obtain most
While good demolition effect, energy road pavement side reaches preferable protection.
In conclusion the invention has the following advantages:
Rock can be made only to rupture and topple over to safety zone side in blasting process, reduce in blasting process rock with
Just a possibility that splashing with dust to road surface, guarantees that explosion makes the safety of surrounding, moreover it is possible to reduce the usage amount of explosive, increase quick-fried
A possibility that broken effect, reduction miso-fire and blind big gun generate.
Detailed description of the invention
Fig. 1 is strata structure schematic diagram, it is intended to indicate blasting with trapezoidal gap structure.
Appended drawing reference: 1, blasthole；2, isolation seam；3, blasting gap.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
As shown in Fig. 1, the left side of rock is safety zone, and right side is road surface, and when explosion needs to make rock to safety zone side
To collapsing, prevent rock from blocking road surface.
The blasting method of rock directional splitting, as follows:
S1: explosion prepares, and according to topography and geomorphology situation, is purged to the rock surface vegetation for needing explosion, carries out big gun
Hole 1 with design, choose suitable drilling machine, and drilling machine is transported to scene and is awaited orders, be correspondingly arranged in several scheduled 1 positions of blasthole
Several working faces and the good hole location of cloth.
S2: cloth hole drilling uses single eye cloth hole when cloth hole, and blasthole 1 is tiltedly installed with several towards safety zone side.
Several blastholes 1 are linearly arranged, and the straight line that blasthole 1 is formed is extended from road surface to safety zone direction.1 diameter of blasthole is 90mm,
Spacing is 0.8m~1.5m, and the tilt angle a of blasthole 1 is 10 °~20 °, and opening direction is arranged towards safety zone direction.Drilling
Blasthole 1 is cleared up after the completion, it is ensured that rock powder is fully erased in hole.Wherein, rock mass is provided with a width close to road surface side in advance
2 are stitched for the isolation of 60mm, forms an acting surface, blasthole 1 is located at isolation seam 2 far from road surface side.
S3: detonator production prepares several detonators and fuse cord, makes in andron, fuse cord one end is cut flat with together,
The other end is cut into angle, and fuse cord length is greater than 1.2m, then fuse cord is inserted into detonator, until the strengthening cap of detonator is contradicted, then
Detonator mouth is clamped and wrapped rubber bandage with joint pliers, checks the resistance and stability of every detonator.
S4: powder charge blocking, warning of clearing out a gathering place before powder charge, warning safe distance are greater than 400m, it is ensured that warning distance is in slungshot shadow
It rings outside area, transports detonator to work surface after the completion of withdrawing.Temperature in the angle of detection hole, direction, structure, powder stick diameter and hole
Degree, it is ensured that temperature in borehole carries out the filling of detonator after being lower than 60 DEG C.Before gunpowder filling, flexible pad is set in each blast hole bottom
Layer, gunpowder is placed on flexible cushion, and when filling guarantees that explosive is arranged along the high degree of dispersion of hole depth.Gunpowder passes through thin after having loaded
Sand, clay and rubble powder are filled.Gunpowder fill depth h is from road surface side blasthole 1 to safety zone side blasthole 1, depth
It is incremented by successively and linear incremental, form blasting with trapezoidal notch 3.Wherein, gunpowder fill depth h be 1 depth H of blasthole 1/8~
1/2, and blocked using filler.
S5: detonator is transported to formulation position and successively on line, guarantee is tied towards each fire point by operation by networking explosion
It closes position binding securely, blasting network is checked before detonating, measurement conducting wire is in energized state, carries out detonation operation, by close to peace
Gunpowder is successively ignited laterally closer road surface side by the whole district one, completes explosion.
S6: after confirmation explosion is normal, blown-out shot, blind big gun are handled in time, and the rubble generated after explosion and scrap are cleaned out
Scene, completes the directional blasting of rock, and achievees the purpose that mucking.
The above embodiments are only explanation of the invention, are not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (6)
1. a kind of blasting method of rock directional splitting, which comprises the steps of:
S1: explosion prepares, and according to topography and geomorphology situation, is purged to the rock surface vegetation for needing explosion, carries out blasthole (1)
Design, suitable drilling machine is chosen, and drilling machine is transported to scene and is awaited orders, in several scheduled blastholes (1) if position is correspondingly arranged
Dry working face and the good hole location of cloth；
S2: cloth hole drilling uses single eye cloth hole when cloth hole, and blasthole (1) is tiltedly installed with several towards safety zone side, if
Dry blasthole (1) is linearly arranged, and the straight line that blasthole (1) is formed is extended from road surface to safety zone direction, and blasthole (1) diameter is
90mm, spacing are 0.8m~1.5m, are cleared up after the completion of drilling blasthole (1), it is ensured that rock powder is fully erased in hole；
S3: detonator production prepares several detonators and fuse cord, makes in andron, fuse cord one end is cut flat with together, another
Angle is cut at end, and fuse cord length is greater than 1.2m, then fuse cord is inserted into detonator, until contradict the strengthening cap of detonator, then with cutting with scissors
Detonator mouth is clamped and is wrapped rubber bandage by pincers, checks the resistance and stability of every detonator；
S4: powder charge blocking, warning of clearing out a gathering place before powder charge, warning safe distance are greater than 400m, it is ensured that warning distance is in the slungshot zone of influence
Outside, detonator is transported to work surface, angle, direction, structure, powder stick diameter and the temperature in borehole of detection hole after the completion of withdrawing,
Ensure temperature in borehole lower than the filling for carrying out detonator after 60 DEG C, when filling guarantees that explosive is arranged along the high degree of dispersion of hole depth, gunpowder
For fill depth from road surface side blasthole (1) to safety zone side blasthole (1), depth is incremented by successively, and is blocked up using filler
Plug；
S5: detonator is transported to designated position and by operation towards each fire point successively line, guarantees engaging portion by networking explosion
Position binding is secured；Blasting network is checked before detonation, measurement conducting wire is in energized state, carries out detonation operation, by close to safety zone
Gunpowder is successively ignited in one laterally closer road surface side, completes explosion；
S6: after confirmation explosion is normal, blown-out shot, blind big gun are handled in time, and the rubble and scrap that generate after explosion are cleared up and occurred
, complete the directional blasting of rock.
2. the blasting method of rock directional splitting according to claim 1, it is characterised in that: in S2, rock mass is close to road surface
Side is provided with isolation seam (2) in advance, forms an acting surface, and blasthole (1) is located at isolation seam (2) far from road surface side.
3. the blasting method of rock directional splitting according to claim 2, it is characterised in that: the width of isolation seam (2) is big
In equal to 60mm.
4. the blasting method of rock directional splitting according to claim 1, it is characterised in that: in S4, gunpowder fill depth
It is the 1/8~1/2 of blasthole (1) depth.
5. the blasting method of rock directional splitting according to claim 1, it is characterised in that: in S4, gunpowder fill depth
Linearly it is incremented by from road surface side blasthole (1) to safety zone side blasthole (1) depth, is formed blasting with trapezoidal notch (3).
6. the blasting method of rock directional splitting according to claim 1, it is characterised in that: in S4, before gunpowder filling,
Flexible cushion is arranged in each blast hole bottom, and gunpowder is placed on flexible cushion, and gunpowder passes through fine sand, clay and rubble after having loaded
Powder is filled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710618876.6A CN107228608B (en) | 2017-07-26 | 2017-07-26 | The blasting method of rock directional splitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710618876.6A CN107228608B (en) | 2017-07-26 | 2017-07-26 | The blasting method of rock directional splitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107228608A CN107228608A (en) | 2017-10-03 |
| CN107228608B true CN107228608B (en) | 2018-12-04 |
Family
ID=59956638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710618876.6A Active CN107228608B (en) | 2017-07-26 | 2017-07-26 | The blasting method of rock directional splitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107228608B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737846B (en) * | 2019-02-28 | 2021-04-16 | 武汉大学 | Anti-explosion blasting method for gentle dip angle stratified rock mass |
| CN113039980A (en) * | 2019-12-26 | 2021-06-29 | 北方***科技有限公司 | Mine green plant restoration method for rock slope |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314990A (en) * | 2008-07-03 | 2008-12-03 | 武汉***公司 | Method for dynamiting buildings |
| CN102230769B (en) * | 2011-06-16 | 2013-06-05 | 汇通路桥建设集团有限公司 | Multi-row micro-differential roadbed deep hole blasting construction method |
| CN102818485B (en) * | 2012-08-17 | 2014-08-27 | 重庆市***工程建设有限责任公司 | High slope sunken layered blasting relief method |
| CN103629980B (en) * | 2013-12-16 | 2015-09-16 | 中铁二十三局集团第四工程有限公司 | Near existing line steep massif Loose Control Blasting construction method |
| CN106288996B (en) * | 2016-08-24 | 2018-05-25 | 广西新港湾工程有限公司 | A kind of underwater groove presplit blasting construction method |
| CN106839906B (en) * | 2016-12-29 | 2018-05-01 | 四川中鼎***工程有限公司 | The directional blasting demolishment method of armored concrete tubular structure towering structure |
-
2017
- 2017-07-26 CN CN201710618876.6A patent/CN107228608B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107228608A (en) | 2017-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107063014B (en) | Slope method is cut in cutting shallow bore hole step control explosion under complex environment | |
| JP6634375B2 (en) | Explosive tube tube having air gap and rock blasting method using the same | |
| JPH11510575A (en) | A method for controlled fragmentation of hard rock and concrete by using a combination of impact hammer and low charge blasting | |
| CN101441055A (en) | Presplit blasting method | |
| PL182548B1 (en) | Method of and appartus for controllably shooting off hard rock and concrete by means of small explosive charges | |
| CN104358580B (en) | The major part jet perforating tubular type grouted anchor bar of a kind of ribmet skeleton and construction method | |
| CN113154974B (en) | Tunnel roof pressing smooth blasting method | |
| CN108645300A (en) | Complex reflex cumulative and buffering energy dissipator and the blasting construction method based on the device | |
| CN109855496B (en) | Comprehensive melon breaking type deep hole cutting blasting method for hard rock in tunnel | |
| CN104596375A (en) | Fully mechanized excavation construction method for rock roadway | |
| CN203837604U (en) | Full-face hole bottom air-spaced loading mechanism for underground roadway tunneling | |
| CN104990471B (en) | Extremely short-range blasting construction vibration absorbing method and vibration absorbing and energy gathering lancing cartridge | |
| CN111521069A (en) | Carbon dioxide phase change directional pressure relief fracturing device for tunneling and use method thereof | |
| CN102967191A (en) | Blasting method for treatment of gob | |
| KR101995174B1 (en) | structure base rock fragmentation of slight vibration | |
| CN107228608B (en) | The blasting method of rock directional splitting | |
| CN105021096A (en) | Five-segment-type millisecond electric detonator secondary blasting construction method applied to blasting of high-gas large-section tunnel | |
| CN215810502U (en) | Blast hole charging structure for energy-gathered water pressure blasting | |
| CN103822555B (en) | Blasting method in a kind of hydraulic engineering strengthening reconstruction construction | |
| CN105953671A (en) | Construction method for excavating siliceous slate stone side slope | |
| CN108915694A (en) | It the step tunneling boring unprotect layer tight-face blasting of tunnel lower layer and repairs the roads and protects logical construction method | |
| CN113607016A (en) | Underground excavation method subway underpass existing line hard rock static blasting construction method | |
| CN110924398B (en) | High-strength rock slope widening excavation construction method under condition of traffic protection | |
| CN111219190A (en) | Method for directional roof cutting by energy-gathered water pressure blasting | |
| CN110230959A (en) | A kind of stone matter cut slope control blasting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |