CN105157492B - The double presplitting controlled blasting structures of basement rock protective layer and method - Google Patents
The double presplitting controlled blasting structures of basement rock protective layer and method Download PDFInfo
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- CN105157492B CN105157492B CN201510575477.7A CN201510575477A CN105157492B CN 105157492 B CN105157492 B CN 105157492B CN 201510575477 A CN201510575477 A CN 201510575477A CN 105157492 B CN105157492 B CN 105157492B
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Abstract
The invention discloses a kind of double presplitting controlled blasting structures of basement rock protective layer and method; in excavation face arrangement construction presplitting separated by a distance, the pre- ceasma of the row of structure presplitting two; excavation face is divided into Liang Gezhubao areas, main blast hole, cushion hole, pre- ceasma order of placement is each individually formed；Millisecond detonating network is used during explosion, and controls the adverse factors such as concussion of blasting, twice precracking is formed separately, and Liang Gezhubao areas detonate respectively；Double presplitting controlled blasting methods had both reduced principal earthquake ripple, also overcomed presplitting gap convergence property, formed preferable damping effect to protect basement rock, and the earthwork of an explosion circulation is big, preferably solves the contradictory relation of efficient rock-breaking and protection basement rock.
Description
Technical field
The present invention relates to engineering explosion technical field, and in particular to a kind of double presplitting controlled blasting structures of basement rock protective layer with
Method.
Background technology
With the progress of explosive and blasting technique, presplit blasting Controlled blasting technique is used widely, and presplitting is quick-fried
Broken is a kind of important method of basement rock protective level blasting damping.The forward position design of presplit blasting damping mechanism Shi Zhubao area's explosions
Contour line first produces a through crack with one fixed width, is acted on by the physical isolation in crack, is excavated with buffering, reflecting
The shock wave of explosion, intercepts the propagation path of seismic wave between peel ply and protective layer rock, controls it to be broken to retaining rock mass
Bad influence, to obtain more smooth outline excavation.
At present, presplit blasting has generally been adopted Millisecond Blasting and has been detonated, and when Millisecond Blasting is detonated, pre- ceasma rises first
It is quick-fried, form precracking, then detonate successively main blast hole, cushion hole.Because the presplitting gap that presplit blasting hole is formed is smaller, generally
3~8mm, the seismic wave of the main blast hole that detonates at first is by the way that behind presplitting gap, presplitting gap has convergent tendency, once fissure rock
After contact, the seismic wave of the main blast hole that subsequently detonates will be propagated by presplitting gap rock contact towards protective layer rock, cause drop
Shake effect declines.In practice, when the total time delay of the Millisecond Blasting in Zhu Bao areas is more than 800 milliseconds, the shock dropping in presplitting gap is made
With being remarkably decreased.
Therefore, using conventional presplit blasting method, the total dose of single presplit blasting circulation explosion, millisecond detonating network are total
Time delay is unsuitable excessive, and this excavation face step for also resulting in single presplit blasting circulation can not be too big, constrains Blasting Excavation effect
Rate, extends the excavation construction duration, such as in big side slope, when Large span cavern is excavated, and the deficiency of single presplit blasting method of routine
Part is showed must be become apparent.
The content of the invention
Instant invention overcomes the deficiencies in the prior art, there is provided a kind of double presplitting controlled blasting structures of basement rock protective layer and side
Method, the contradictory problems for preferably solving efficient rock-breaking and protection basement rock.
In view of the above mentioned problem of prior art, according to one side disclosed by the invention, the present invention uses following technology
Scheme：
A kind of double presplitting controlled blasting structures of basement rock protective layer, it includes being arranged at the on basement rock protective level blasting step
One Zhu Bao areas and the second Zhu Bao areas；The first Zhu Bao areas and the second Zhu Bao areas are separated by pre- ceasma of constructing；Explosion step water
Square it is to blast hole order of placement from outside to inside：The first main blast hole in Zhu Bao areas, the first master in the first Zhu Bao areas is quick-fried
Area's cushion hole, construct pre- ceasma, the second main blast hole in Zhu Bao areas, the second Zhu Bao areas cushion hole in the second Zhu Bao areas, structure
Pre- ceasma；The pre- ceasma of structure is arranged on basement rock protective layer structure design profile line.
In order to the present invention is better achieved, further technical scheme is：
An embodiment of the invention, the pre- ceasma of construction is respectively set to a row with the pre- ceasma of the structure.
A kind of double presplitting controlled blasting methods of basement rock protective layer, it includes：
I) the first Zhu Bao areas and the second Zhu Bao areas are set on basement rock protective level blasting step；The first Zhu Bao areas and
Two Zhu Bao areas are separated by pre- ceasma of constructing；Explosion step blast hole order of placement from outside to inside is：Positioned at the first Zhu Bao areas
On the first main blast hole in Zhu Bao areas, the first Zhu Bao areas cushion hole, construct pre- ceasma, the second Zhu Bao areas in the second Zhu Bao areas
Main blast hole, the second Zhu Bao areas cushion hole, the pre- ceasma of structure；The pre- ceasma of structure is arranged in basement rock protective layer structure design profile
On line；
II) to the blast hole powder charge on basement rock protective level blasting step；
III) initiation net networking；
IV) implement explosion and scarfing cinder.
Another embodiment of the invention, the pre- ceasma of construction is used with the pre- ceasma of the structure and is not coupled dress
The mode of medicine and/or underground borehole blasting, the first Zhu Bao areas cushion hole and the second Zhu Bao areas cushion hole are changed using hole Nei Yao footpaths
Charging means, the first main blast hole in Zhu Bao areas and the second main blast hole in Zhu Bao areas use continuous charging structure.
Another embodiment of the invention, uses millisecond detonating network during explosion.
Another embodiment of the invention, the first Zhu Bao areas and the second Zhu Bao areas detonate respectively.
The present invention can also be：
Another embodiment of the invention, the order of detonation is：Construct the pre- main blast hole in ceasma → the first Zhu Bao areas
→ the first Zhu Bao areas cushion hole → main blast hole → the second Zhu Bao areas cushion hole in the pre- ceasma → the second Zhu Bao areas of structure.
Compared with prior art, one of beneficial effects of the present invention are：
A kind of double presplitting controlled blasting structures of basement rock protective layer of the invention and method, have：
1) by big bench blasting excavation face using the pre- ceasma of two row's independences as isolation strip, will master be quick-fried divides into Liang Ge areas
Domain, Liang Gezhubao areas detonate respectively, reduce Zhu Bao areas vibrations limit amplitude；
2) millisecond detonating network is used during explosion, twice precracking is formed separately, and Liang Gezhubao areas detonate respectively, each master
Quick-fried area has one complete precracking to play cushioning effect when detonating, overcome presplitting gap convergence characteristic, it is ensured that preferably
Damping effect is protecting basement rock.
3) the Liang Gezhubao areas of big bench blasting excavation face are using synchronous drilling construction, powder charge networking, millisecond detonating, shipment
The working procedure of scarfing cinder, the earthwork of an explosion circulation is big, efficiency high, the larger raising construction speed of energy, preferably solves
The contradictory relation of efficient rock-breaking and protection basement rock.
Brief description of the drawings
For clearer explanation present specification embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for the description of prior art is briefly described, it should be apparent that, drawings in the following description are only
It is the reference to some embodiments in present specification, for those skilled in the art, is not paying creative work
In the case of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows the double presplitting controlled blasting structural representations of basement rock protective layer according to an embodiment of the invention.
Fig. 2 shows that highway in accordance with another embodiment of the present invention adjoins slope blasting hole generalized section.
Fig. 3 shows powder charge generalized section in presplit blasting hole in accordance with another embodiment of the present invention.
Fig. 4 shows powder charge generalized section in buffer shooting hole in accordance with another embodiment of the present invention.
Fig. 5 shows main blast hole powder charge generalized section in accordance with another embodiment of the present invention.
Fig. 6 shows that highway in accordance with another embodiment of the present invention adjoins slope blasting network arrangement schematic diagram.
Wherein, it is entitled corresponding to the reference in accompanying drawing：
The first Zhu Bao of 1- areas, the second Zhu Bao of 2- areas, the pre- ceasma of 3- constructions, the main blast hole in the first Zhu Bao of 4- areas, 5- first
Zhu Bao areas cushion hole, the main blast hole in the second Zhu Bao of 6- areas, the second Zhu Bao of 7- areas cushion hole, the pre- ceasma of 8- structures, 9- excavation faces
Contour line, 10- reinforcement powder charge sections, 11- normal charges section, 12- primacords/detonator, 13- primacords, 14- bamboo chips,
The diameter powder sticks of 15- Φ 32, the diameter powder sticks of 16- Φ 70, the emulsified detonator loading structures of 17- Φ 70.
Specific embodiment
The present invention is described in further detail with reference to embodiment, but embodiments of the present invention not limited to this.
As shown in figure 1, a kind of double presplitting controlled blasting structures of basement rock protective layer, it includes being arranged at basement rock protective level blasting
The first Zhu Bao areas 1 and the second Zhu Bao areas 2 on step；Zhu Bao areas 2 of the first Zhu Bao areas 1 and second are by pre- ceasma 3 of constructing
Separate；Explosion step horizontal direction blast hole order of placement from outside to inside is：The first Zhu Bao areas in the first Zhu Bao areas 1
Main blast hole 4, the first Zhu Bao areas cushion hole 5, the pre- ceasma 3 of constructing, the main blast hole 6 in the second Zhu Bao areas in the second Zhu Bao areas 2, the
The two pre- ceasmas 8 of Zhu Bao areas cushion hole 7, structure；The pre- ceasma 8 of structure is arranged on basement rock protective layer structure design profile line.
Pre- ceasma 3 of constructing respectively is set to a row with the pre- ceasma 8 of the structure.
Millisecond detonating network is used during explosion, twice precracking is formed separately, and Liang Gezhubao areas detonate respectively, and each master is quick-fried
Area has one complete precracking to play cushioning effect when detonating.Double presplitting controlled blasting methods had both reduced principal earthquake ripple,
The convergence of presplitting gap is overcome, forms preferable damping effect to protect basement rock.
A kind of double presplitting controlled blasting methods of basement rock protective layer, it includes：
1) blast hole arrangement
Arrange two row's presplit blasting holes altogether in excavation face, the pre- ceasma of structure is arranged in basement rock protective layer structure design profile
On line.Pre- ceasma of constructing is arranged on the medium line of excavation face, separates the first Zhu Bao areas and the second Zhu Bao areas.Explosion step level
Direction blast hole from outside to inside is arranged as：The first main blast hole in Zhu Bao areas, the first Zhu Bao areas cushion hole, construct pre- ceasma, second
The main blast hole in Zhu Bao areas, the second Zhu Bao areas cushion hole, the pre- ceasma of structure.
2) preparation of construction and drilling
Scum silica frost in the region specified by presplit blasting is purged first, is purged totally scar with high-pressure blast, be easy to
Measurement is put a little.After the completion of scar cleaning, measurement hole-specifically carries out unwrapping wire according to explosion design requirement, has recorded aperture elevation.To surveying
Amount puts that a position is indicated using paint, woven bag or cardboard are protected.When applying brill, in strict accordance with design hole depth and angle
Spud in, while controlling drill bit to fall on design point position, it is ensured that pitch of holes meets design requirement.A hole is often completed, is checked immediately
Hole depth, benefit brill is carried out to the not enough hole of hole depth in time.
3) blast hole powder charge
Pre- ceasma uses decoupling charge and underground borehole blasting structure, and cushion hole changes powder charge knot using hole Nei Yao footpaths
Structure, main blast hole uses continuous charging structure.
Pre- ceasma charge constitution：In blast hole bottom section, because the clipping power being subject to is maximum, therefore using powder charge is strengthened, increase
Plus acting ability, promote the abundant presplitting of floor rocks；In the middle part of blast hole, belong to normal charge section, filled using common interval
Medicine structure；On blast hole top, the clipping power being subject to is minimum, using decrease charge constitution.Make blast hole powder charge and minimum rock
Burden is adapted, and presplitting effect is effectively ensured.
Cushion hole charge constitution：Buffer shooting hole is using change chemical drug footpath charge constitution, continuous charging.In blast hole bottom section,
Because the clipping power being subject to is maximum, using reinforcement charge constitution；In blast hole epimere, because the clipping power being subject to reduces, use
Weaken charge constitution.
Main blast hole charge constitution：Main blast hole uses continuous charging structure, and in aperture, section will ensure plugging effect.
4) initiation net networking
Delay to be spaced initiation net using millisecond, pre- ceasma uses primacord propagation of explosion.Delayed ignition order be：Construction presplitting
The quick-fried area's buffering of the quick-fried area's cushion hole of main blast hole → the first in the quick-fried area of hole → the first → main blast hole → the second in the quick-fried area of pre- ceasma → the second of structure
Hole.
5) explosion and scarfing cinder
Before explosion monitoring instrument is laid in precalculated position.Before quick-fried through blasting technique personnel inspection it is qualified after can implement
It is quick-fried, it is quick-fried after carry out checking situation without exception after, loading is slagged tap.Monitoring of blasting vibration data are collected with analysis simultaneously, are assessed
Whether concussion of blasting parameter is in prescribed limit.
Blast working example：
So that certain highway adjoins slope excavating explosion as an example, because slope excavating structural plane is closer to the distance apart from highway foundation,
Concussion of blasting is difficult to control, and easily highway foundation geology is damaged.Simultaneously as the construction period is nervous, using traditional
Small stair blasting method is difficult to meet construction period, therefore takes double presplitting controlled blasting construction method.
1) blast hole arrangement
As shown in Fig. 2 arranging two row's presplit blasting holes altogether on slope excavating face, the pre- ceasma arrangement packway design of structure is opened
It is consistent with structure design profile inclination angle in mouth line.Pre- ceasma of constructing is arranged at 9.5 meters of the pre- ceasma of distance structure, separates the
One Zhu Bao areas and the second Zhu Bao areas.
Pre- ceasma uses the apertures of Φ 90；Because the pre- ceasma of structure is arranged in inclined aperture lines, and pre- ceasma of constructing is
It is arranged vertically, the pre- ceasma of structure presplitting boring ratio construction is compared, and the former hole depth must be longer, therefore, the pre- ceasma hole depth of structure takes
12m, pre- ceasma hole depth of constructing takes 8m；The pre- ceasma of structure, the pitch of holes of pre- ceasma of constructing are 80cm；The pre- ceasma of structure, construction
Presplitting hole number is 30.
Cushion hole uses the apertures of Φ 90；First quick-fried area's cushion hole hole depth 8m, second quick-fried area's cushion hole hole depth is 8.6m；The
One quick-fried area's cushion hole and construction presplitting pitch of holes 200cm, second quick-fried area's cushion hole and structure presplitting pitch of holes 150cm；Cushion hole
Pitch of holes takes 250cm；First quick-fried area's cushion hole, second quick-fried area's buffering hole number are 11.
Main blast hole uses the apertures of Φ 90；The first quick-fried main blast hole hole depth 8m in area, the second quick-fried main blast hole hole depth in area is with inclination angle
Respective change, hole depth is 3~5.8m；The first quick-fried main blast hole row's spacing 250cm in area, the second quick-fried main blast hole row spacing 250cm in area, it is main
Blast hole pitch of holes takes 300cm.
2) maximum single blow blasting charge
In explosion bulge test, the K=74 of water inlet region, α=1.6, according to V=K (Q1/3/R) α, adjacent architectural are measured
Thing is about 6m apart from excavation face minimum range, and particle vibrations speed controls standard for 10cm/s, and calculating explosive quantity in a sound is
18.5kg, therefore presplit blasting maximum single blow blasting charge is because controlling below the value, therefore in practice of construction, by three hole one-stage controls
Dose is not more than 18.5kg, to ensure the safety of Nearby Structure.Double presplit blasting parameter lists are shown in Table 1.
Table 1：Highway adjoins the double presplit blasting parameter lists of side slope
Maximum single sound of main blast hole is not more than 150kg, unit consumption 0.4kg/m3, main blast hole blasting parameter table is shown in Table 2
Table 2：Highway adjoins the main blast hole parameter list of side slope
3) blast hole charge constitution
Pre- ceasma uses decoupling charge and underground borehole blasting structure, and cushion hole changes powder charge knot using hole Nei Yao footpaths
Structure, main blast hole continues charge constitution using side.
Pre- ceasma charge constitution：In blast hole bottom section, because the clipping power being subject to is maximum, therefore using powder charge is strengthened, increase
Plus acting ability, promote the abundant presplitting of floor rocks；In the middle part of blast hole, belong to normal charge section, filled using common interval
Medicine structure；On blast hole top, the clipping power being subject to is minimum, using decrease charge constitution.As shown in figure 3, including strengthening powder charge
Section 10, normal charge section 11, decrease powder charge section 12, primacord 13, bamboo chip 14, it is strengthened powder charge section 10, normal charge section 11, subtracts
Reduced charge section 12 sets gradually from the bottom to top, then adds stemming to block by burlap, strengthen powder charge section 10 can using 6 sections 2 ×
The powder sticks of φ 32, normal charge section 11 can save the@30cm of φ 32 using (L-420)/50, and weakening powder charge section 12 can be using 4 section 1/2
The@27.5cm of φ 32, using presplit blasting hole as shown in Figure 3 charge constitution, make blast hole powder charge mutually be fitted with minimum rock burden
Should, presplitting effect is effectively ensured.
Cushion hole charge constitution：Buffer shooting hole is using change chemical drug footpath charge constitution, continuous charging, such as Fig. 4, upper and lower
Portion uses Φ 32,70 two kinds of diameter powder sticks of Φ 16,15.In blast hole bottom section, because the clipping power being subject to is maximum, filled using reinforcement
Medicine structure, uses the emulsions of Φ 70；In blast hole epimere, because the clipping power being subject to reduces, using charge constitution is weakened, make
With the diameter powder stick continuous chargings of Φ 32.
Main blast hole charge constitution：As Fig. 5, main blast hole use the emulsified detonator loading structures 17 of Φ 70, in aperture, section will ensure
Plugging effect.
4) initiation net structure
As shown in fig. 6, being delayed using millisecond is spaced initiation net, pre- ceasma uses primacord propagation of explosion.Delayed ignition is sequentially
For：Construct the quick-fried area's cushion hole of main blast hole → the first in the quick-fried area of pre- ceasma → the first → main blast hole → the in the quick-fried area of pre- ceasma → the second of structure
Two quick-fried area's cushion holes.
5) monitoring of blasting vibration and analysis
In order to check the effect of double presplitting controlled blasting methods, carried out respectively on the explosion step of identical drilling depth single pre-
Split, double presplit blasting is tested, and the excellent of two methods is compared by testing the particle vibration velocity of protection group rock same position
It is bad.It is the comparativity of guarantee test data, the Zhu Bao areas maximum single blow blasting charge of single presplitting is still by 150kg controls, it is therefore desirable to
Increase detonator section and do not extend the extension time.Point layout divides on highway top in the centre of explosion bulge test side slope step twice
Every a survey line is set on line, velocity of vibration sensor is arranged every 12m, totally 3 measuring points, take three direction velocity of vibrations of particle
As evaluating basis.
Table 3：Highway adjoins slope blasting experiment measuring point vibrations parameter list
Can be drawn from the particle vibration data of table 3：Double presplit blasting is more preferable than the damping effect of single presplitting, this examination
Test particle vibration velocity reduction about 20%~30%.
In sum, the present invention excavation face it is separated by a distance arrangement construction presplitting, the pre- ceasma of the row of structure presplitting two,
Excavation face is divided into Liang Gezhubao areas, is each individually formed main blast hole, cushion hole, pre- ceasma order of placement.Using micro- during explosion
Difference initiation net, twice precracking is formed separately, and Liang Gezhubao areas detonate respectively.Double presplitting controlled blasting methods had both been reduced mainly
Seismic wave, also overcomes presplitting gap convergence property, forms preferable damping effect to protect basement rock, and explosion circulation
Earthwork is big, preferably solves the contradictory relation of efficient rock-breaking and protection basement rock.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, identical similar portion cross-reference between each embodiment.
" one embodiment ", " another embodiment ", " embodiment " for being spoken of in this manual, etc., refer to knot
Specific features, structure or the feature for closing embodiment description are included at least one embodiment of the application generality description
In.It is not necessarily to refer to same embodiment that statement of the same race occur in multiple places in the description.Furthermore, it is understood that with reference to appoint
When one embodiment describes specific features, structure or a feature, what is advocated is this to realize with reference to other embodiment
Feature, structure or feature also fall within the scope of the present invention.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementation methods, and these modifications and implementation method will fall in this Shen
Please be within disclosed spirit and spirit.More specifically, in the range of disclosure and claim, can be to master
The building block and/or layout for inscribing composite configuration carry out various variations and modifications.Except what is carried out to building block and/or layout
Outside variations and modifications, to those skilled in the art, other purposes also will be apparent.
Claims (7)
1. double presplitting controlled blasting structures of a kind of basement rock protective layer, it includes be arranged on basement rock protective level blasting step first
Zhu Bao areas (1) and the second Zhu Bao areas (2)；It is characterized in that the first Zhu Bao areas (1) and the second Zhu Bao areas (2) are pre- by construction
Ceasma (3) separates；Explosion step horizontal direction blast hole order of placement from outside to inside is：In the first Zhu Bao areas (1)
The first main blast hole in Zhu Bao areas (4), the first Zhu Bao areas cushion hole (5), the pre- ceasma (3) constructed, in the second Zhu Bao areas (2) the
The two main blast hole in Zhu Bao areas (6), the second Zhu Bao areas cushion hole (7), the pre- ceasma of structure (8)；The pre- ceasma of structure (8) is arranged in base
On rock protective layer structure design profile line.
2. double presplitting controlled blasting structures of basement rock protective layer according to claim 1, it is characterised in that the construction presplitting
Hole (3) is respectively set to a row with the pre- ceasma of the structure (8).
3. a kind of double presplitting controlled blasting methods of basement rock protective layer, it is characterised in that it includes：
I) the first Zhu Bao areas (1) and the second Zhu Bao areas (2) are set on basement rock protective level blasting step；The first Zhu Bao areas
(1) separated by pre- ceasma (3) of constructing with the second Zhu Bao areas (2)；Explosion step blast hole order of placement from outside to inside is：Position
In the first main blast hole in Zhu Bao areas (4) in the first Zhu Bao areas (1), the first Zhu Bao areas cushion hole (5), pre- ceasma (3) of constructing is located at
The the second main blast hole in Zhu Bao areas (6), the second Zhu Bao areas cushion hole (7) in second Zhu Bao areas (2), the pre- ceasma of structure (8)；The knot
The pre- ceasma of structure (8) is arranged on basement rock protective layer structure design profile line；
II) to the blast hole powder charge on basement rock protective level blasting step；
III) initiation net networking；
IV) implement explosion and scarfing cinder.
4. double presplitting controlled blasting methods of basement rock protective layer according to claim 3, it is characterised in that the construction presplitting
With the pre- ceasma of the structure (8) by the way of decoupling charge and/or underground borehole blasting, the first Zhu Bao areas buffer in hole (3)
Hole (5) and the second Zhu Bao areas cushion hole (7) using the change of hole Nei Yao footpaths charging means, the first main blast hole in Zhu Bao areas (4) and the
The two main blast hole in Zhu Bao areas (6) are by the way of continuous charging.
5. double presplitting controlled blasting methods of basement rock protective layer according to claim 3, it is characterised in that using micro- during explosion
Difference initiation net.
6. double presplitting controlled blasting methods of basement rock protective layer according to claim 3, it is characterised in that first master is quick-fried
Area (1) and the second Zhu Bao areas (2) detonate respectively.
7. double presplitting controlled blasting methods of basement rock protective layer according to claim 3, it is characterised in that the order of detonation is：
Construct pre- ceasma (3) → first Zhu Bao areas main blast hole (4) → first Zhu Bao areas cushion hole (the 5) → pre- ceasma of structure (8) → second
Zhu Bao areas main blast hole (6) → second Zhu Bao areas cushion hole (7).
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| 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 |
| CN107144194A (en) * | 2017-07-07 | 2017-09-08 | 贵州大学 | A kind of explosion shock dropping buffers band structure |
| CN107478114B (en) * | 2017-09-19 | 2019-07-12 | 中交一公局厦门工程有限公司 | A kind of parallel slope buffered hole depth hole side slope presplit blasting construction method |
| CN110657722A (en) * | 2019-09-25 | 2020-01-07 | 昆明理工大学 | Hole-by-hole initiation method for complex environment foundation pit excavation |
| CN110671983A (en) * | 2019-10-08 | 2020-01-10 | 中国葛洲坝集团易普力股份有限公司 | Presplitting blasting combined charging structure and method |
| CN110823030A (en) * | 2019-10-23 | 2020-02-21 | 包头钢铁（集团）有限责任公司 | Method for protecting rear rock mass by large-scale blasting of strip mine |
| CN112696998A (en) * | 2020-12-29 | 2021-04-23 | 包头钢铁（集团）有限责任公司 | Controlled blasting forming method for foundation pit of open-pit mine crushing station |
| CN113028921B (en) * | 2021-03-12 | 2022-12-27 | 福建兴万祥建设集团有限公司 | Strip mine slope presplitting blasting method |
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| CN1052525C (en) * | 1997-10-23 | 2000-05-17 | 北京矿冶研究总院 | Open-air high-step mining method |
| 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 |
| CN102809329A (en) * | 2012-08-17 | 2012-12-05 | 重庆市爆破工程建设有限责任公司 | Stone shallow hole blasting control method applied in town |
| CN203385336U (en) * | 2013-07-23 | 2014-01-08 | 内蒙古康宁爆破有限责任公司 | Blast vibration absorbing belt |
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