CN107269284A - Hard rock tunnel excavation construction method - Google Patents
Hard rock tunnel excavation construction method Download PDFInfo
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- CN107269284A CN107269284A CN201710709431.9A CN201710709431A CN107269284A CN 107269284 A CN107269284 A CN 107269284A CN 201710709431 A CN201710709431 A CN 201710709431A CN 107269284 A CN107269284 A CN 107269284A
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 88
- 239000011435 rock Substances 0.000 title claims abstract description 80
- 238000010276 construction Methods 0.000 title claims abstract description 46
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 238000004880 explosion Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 13
- 238000011161 development Methods 0.000 claims description 11
- 230000001154 acute effect Effects 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000005422 blasting Methods 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 11
- 239000004567 concrete Substances 0.000 abstract description 5
- 238000010297 mechanical methods and process Methods 0.000 abstract description 5
- 239000011378 shotcrete Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000002360 explosive Substances 0.000 description 3
- 239000010438 granite Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000036512 infertility Effects 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 208000022971 Tuberculous meningitis Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 208000001223 meningeal tuberculosis Diseases 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention relates to a kind of hard rock tunnel excavation construction method, it comprises the following steps：S1：Free face is dug along the bottom of tunnel tunnel face；S2：Face central region more than free face bores multiple blast holes；S3：Blaster is respectively provided with each blast hole, explosion is carried out；S4；Rock mass to the region between face excavation contour line beyond burst region carries out mechanical cut, completes the excavation in tunnel.Drilling and blasting method is combined and carries out excavation construction to hard rock tunnel by the present invention with non-explosion Mechanical Method, wherein, the central region of face is excavated using drilling and blasting method, it is possible to increase excavate efficiency, and the equipment consuming cost excavated and brought using plant equipment can be reduced；Cut is carried out to the rock mass beyond blast area to the region between whole tunnel excavation contour line by plant equipment, control out break that can be relatively good makes excavation scope of operation regular shape, reduce because backbreak and caused by gunite concrete waste.
Description
Technical field
The present invention relates to constructing tunnel working skill field, more particularly to a kind of hard rock tunnel excavation construction method.
Background technology
Under rock operating mode, the conventional method of tunnel excavation has two major classes, and the first kind is drilling and blasting method, i.e. explosive is laid in drilling,
Using the shock wave energy formed after explosive initiation by rock crushing, this method is widely used because efficiency of construction is high；Second
Class method is non-explosion Mechanical Method, and excavated using equipment such as large-scale TBM development machines, cantilever excavator, quartering hammers, mechanical
The remarkable advantage of excavation is small for vibration, noise, small to periphery disturbance, excavates out break along tunnel contour and controls, safety and environmental protection.
But, there is cost height in large-scale development machine, transport is not convenient, the heavy constructions such as long distance tunnel are only applicable to, for substantial amounts of
Middle Pollen sterility is not applied to.The small-sized excavation equipment work capacity such as cantilevered rock tunnel(ling) machine, quartering hammer is limited, for Polodyakonov coefficient
Coefficient exceedes f6 hard rock operating mode, and low construction efficiency, equipment quick abrasion, construction economy are poor, cause this method in hard rock operating mode
Use be restricted.
However, the tunnel that passes through or close to existing building constructed increasing with the density of infrastructure construction
Road engineering is more and more, using the drilling and blasting method of explosive because the poor, vibration noise of out break control is big, dust concentration is high, release is harmful
Gas and used by limitation.Problem above can effectively solve the problem that using the non-explosion Mechanical Method such as cantilevered rock tunnel(ling) machine, still
For hard rock, low tunneler construction efficiency is its significant shortcoming.
The content of the invention
The purpose of the present invention is to propose to a kind of hard rock tunnel excavation construction method, it can solve the problem that hard rock tunnel excavation construction is imitated
Rate is low, the problem of out break controlling is poor.
To achieve the above object, the invention provides a kind of hard rock tunnel excavation construction method, it comprises the following steps：
S1：Free face is dug along the bottom of tunnel tunnel face；
S2：Face central region more than free face bores multiple blast holes；
S3：Blaster is respectively provided with each blast hole, explosion is carried out；
S4：Mechanical cut is carried out to the rock mass beyond burst region to the region between face excavation contour line, completed
The excavation in tunnel.
One preferably or in alternative embodiment, the depth of the free face in step S1 excavates drilling depth and quick-fried according to single cycle
The length setting of broken device, specially more than the small person 5cm~10cm of numerical value in the two.
One preferably or in alternative embodiment, the blast hole in step S2 is diagonally downward.
One preferably or in alternative embodiment, the angle of the acute angle of blast hole and free face is less than 30 degree.
One preferably or in alternative embodiment, the depth of the blast hole in step S2 and the deep equality of free face.
One preferably or in alternative embodiment, the blaster in step S3 is high pressure pneumatic component device.
One preferably or in alternative embodiment, the gas in high pressure pneumatic component device is inert gas.
One preferably or in alternative embodiment, each blaster explosion simultaneously in step S3.
One preferably or in alternative embodiment, the bottom-up cut of development machine is used in step S4.
One preferably or in alternative embodiment, development machine is cantilevered rock tunnel(ling) machine.
One preferably or in alternative embodiment, set the region of blast hole to account for the ratio of whole face in step S2 and be more than
The region that cut is carried out in step S4 accounts for the ratio of whole face.
Based on above-mentioned technical proposal, the present invention at least has the advantages that：
Drilling and blasting method is combined pair by hard rock tunnel excavation construction method provided in an embodiment of the present invention with non-explosion Mechanical Method
Hard rock tunnel carries out excavation construction, wherein, the central region of face is excavated using drilling and blasting method, it is possible to increase excavate efficiency, and
The equipment consuming cost excavated and brought using plant equipment can be reduced；By plant equipment to beyond blast area to whole tunnel
The rock mass in the region between excavation contour line carries out cut, control out break that can be relatively good, advises excavation scope of operation shape
Then, reduce because backbreak and caused by gunite concrete waste.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic flow sheet of hard rock tunnel excavation construction method provided in an embodiment of the present invention；
Fig. 2 is the corresponding each subregion of hard rock tunnel face of hard rock tunnel excavation construction method provided in an embodiment of the present invention
Schematic diagram.
Label in accompanying drawing：
1- free faces；2- Blasting Excavations area；21- blast holes；3- cuts excavation area；4- excavation contour lines.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiment is clearly and completely retouched
State.Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
As shown in 1, Fig. 2, a kind of hard rock tunnel excavation construction method, it comprises the following steps：
S1：Free face 1 is dug along the bottom of tunnel tunnel face；
S2：In the tunnel tunnel face central region of free face more than 1, i.e. Blasting Excavation area 2, multiple blast holes 21 are bored；
S3：Blaster is respectively provided with each blast hole 21, explosion is carried out to Blasting Excavation area 2；
S4：To carrying out mechanical cut to the region between the excavation contour line 4 of tunnel tunnel face beyond Blasting Excavation area 2,
Complete the excavation in tunnel.Wherein, it is cut to the region between the excavation contour line 4 of tunnel tunnel face beyond Blasting Excavation area 2
Excavation area 3.
Drilling and blasting method is combined pair by hard rock tunnel excavation construction method provided in an embodiment of the present invention with non-explosion Mechanical Method
Hard rock tunnel carries out excavation construction, wherein, the central region (Blasting Excavation area 2) of face, Neng Gouti are excavated using drilling and blasting method
Height excavates efficiency, and can reduce the equipment consuming cost excavated and brought using plant equipment；Explosion is opened by plant equipment
Dig the rock mass beyond area 2 to the region (cut excavation area 3) between the excavation contour line 4 of tunnel tunnel face and carry out mechanical cut,
Control out break that can be relatively good, makes excavation scope of operation regular shape, reduce because backbreak and caused by gunite concrete wave
Take.
The region of blast hole 21 is set to account for whole in hard rock tunnel excavation construction method provided in an embodiment of the present invention, step S2
The ratio of individual face can account for the ratio of whole face, i.e. Blasting Excavation area 2 more than the region that cut is carried out in step S4
The ratio for accounting for whole face is big relative to the ratio that cut excavation area 3 accounts for whole face, and Blasting Excavation area 2 accounts for whole area
The ratio in face is big, can be beneficial to improve to excavate efficiency, the ratio that cut excavation area 3 accounts for whole face is small, as long as can be used for
The trade shape of formation rule, prevents out break, can be realized using small-sized excavation equipment, it is adaptable to which middle Pollen sterility is opened
Dig；Certainly for large tunnel, it would however also be possible to employ large-scale excavation equipment is excavated, to improve excavation efficiency.
The depth of free face 1 in hard rock tunnel excavation construction method provided in an embodiment of the present invention, step S1 can root
The length setting of drilling depth and blaster is excavated according to single cycle, specially more than the small person 5cm~10cm of numerical value in the two, with profit
Come off in the sillar for producing crack from rock mass.
Blast hole 21 in hard rock tunnel excavation construction method provided in an embodiment of the present invention, step S2 can be tilted towards
Under.The embodiment of the present invention sets free face 1 in face bottom, and blast hole 21 is set obliquely, can be beneficial to split inside rock mass
The generation and diffusion of line, while being come off downwards from gravity for rock can be made full use of, improve the efficiency that hard rock tunnel is excavated.
One preferably or in alternative embodiment, the angle of blast hole 21 and the acute angle of free face 1 can be less than 30 degree,
It is easy to rock drilling equipment to set.
One preferably or in alternative embodiment, it can bore multiple oblique in Blasting Excavation area 2 using rock drilling machine in step S2
Downward blast hole 21.
Hard rock tunnel excavation construction method provided in an embodiment of the present invention, closes on tunnel tunnel face excavation contour line 4 and sets
The region (cut excavation area 3) of distance can not set blast hole 21, can be with tunnel tunnel face central region (Blasting Excavation area 2)
Multiple blast holes 21 are set, and spacing and the density of each blast hole 21 can be determined according to pre-stage test section.
The depth of blast hole 21 in hard rock tunnel excavation construction method provided in an embodiment of the present invention, step S2 can be with
The deep equality of free face 1.
Blaster in hard rock tunnel excavation construction method provided in an embodiment of the present invention, step S3 can be gases at high pressure
Blaster.Using high pressure pneumatic component device, using the liquid-gas phase transformation of gas, hundreds times of moment volumetric expansion produces hundreds of MPas
Expansive force, by rock mass spalling with coming off, the excavation efficiency of hard rock tunnel can be significantly improved.
In above-described embodiment, the gas in high pressure pneumatic component device is inert gas.That is high pressure pneumatic component device can
Think inert gas expander.The energy that the present invention is produced just with the physical change of gas, does not produce toxic gas,
Vibration noise is small simultaneously.
Each blaster in hard rock tunnel excavation construction method provided in an embodiment of the present invention, step S3 can be simultaneously quick-fried
It is broken.The rock blasting in face Blasting Excavation area 2 is by the way of overall explosion simultaneously, it is possible to increase efficiency of construction.
Can be bottom-up using development machine in hard rock tunnel excavation construction method provided in an embodiment of the present invention, step S4
Cut is carried out to the rock mass in the region (cut excavation area 3) for the excavation contour line 4 that face is arrived beyond Blasting Excavation area 2, favorably
In control out break.
One preferably or in alternative embodiment, development machine can be cantilevered rock tunnel(ling) machine, cantilevered rock tunnel(ling) machine
Using driven by power, emission-free discharge is relatively more environmentally friendly.
A specific embodiment of the hard rock tunnel excavation construction method that the present invention is provided is set forth below, in the specific embodiment
In, the idiographic flow of hard rock tunnel excavation construction method is as follows：
1) free face 1 is dug in face bottom：Free face 1 is dug along face bottom, the depth of free face 1 is according to design
Single cycle is excavated depending on the length of drilling depth and high pressure pneumatic component device, the length specially slightly larger than the two middle small person of numerical value,
Such as, for the granite tunnel that Polodyakonov coefficient coefficient is f9, single cycle drilling depth is 4m, uses length for 2m high pressure nitrogen
Blaster, then the depth of free face 1 may be configured as 2.1m, the depth of free face 1 is slightly larger than blaster length, beneficial to generation crack
Sillar comes off from rock mass；
2) blast hole 21 is bored：It is multiple obliquely using rock drill machine drill at the middle part of the face in the tunnel of free face more than 1
Blast hole 21, the angle of the acute angle of blast hole 21 and free face 1 is less than 30 degree, is easy to rock drilling equipment to set, blast hole
21 have the advantage that obliquely, beneficial to the generation of rock mass deep crackle.The aperture of blast hole 21 is according to high pressure gas blaster
Depending on caliber.Such as：From the high pressure nitrogen blaster that caliber is 90mm, a diameter of 100mm blast hole is bored using rock drill
21, the depth of blast hole 21 and the deep equality of free face 1.Close on the region of the circumference of excavation contour line 4 of tunnel tunnel face not
If blast hole 21, cut is carried out using cantilevered rock tunnel(ling) machine, the thickness of cut excavation area 3 is (i.e. beyond Blasting Excavation area 2 extremely
The distance between excavation contour line 4) it is 20cm~50cm, spacing and the density of blast hole 21 are determined according to pre-stage test section, right
In the granite tunnel that Polodyakonov coefficient coefficient is f9, pitch-row is set to 50cm~100cm；
3) explosion of Blasting Excavation area 2：Tunnel face Middle face rock blasting is carried out using high pressure pneumatic component device, for general
Family name's hardness factor is f9 granite tunnel, is 90mm from caliber, and length is 2m high pressure nitrogen blaster, is entered per separate explosion
Chi is greatly improved up to 2m, efficiency of construction；
4) cut of cut excavation area 3：The cut of one week non-rupture portion rock mass of tunnel tunnel face is completed using development machine, is cut
It is bottom-up to cut order, to improve the cutting efficiency of development machine.Cantilever excavator is made full use of to excavate what out break was controlled
Advantage, the tunnel excavation profile of formation rule, ensure that construction quality, while reducing the gunite concrete wave caused by backbreaking
Take, so as to reduce construction cost.
By the description of each above-mentioned embodiment, it can derive that the present invention at least has advantages below：
1) hard rock tunnel excavates efficiency high：Using high pressure pneumatic component device, the liquid-gas phase transformation of gas, moment volume are utilized
Hundreds times of expansion, the expansive force of hundreds of MPas of generation, by rock mass spalling with coming off；Face bottom sets free face 1, blast hole
21 set obliquely, beneficial to the generation and diffusion of rock mass underbead crack, while making full use of being come off downwards from gravity for rock.
2) construction quality is high, good economy performance：Rock mass is carried out along tunnel tunnel face contour line 4 using cantilevered rock tunnel(ling) machine
Cut, out break is controlled, excavate scope of operation regular shape, reduce because backbreak and caused by gunite concrete waste；Using
Rock mass in the middle part of high pressure pneumatic component device tunneling face, reduces the pick brought with cantilevered rock tunnel(ling) machine excavation and disappears
Consume cost.
3) work progress environmental protection：Using high pressure pneumatic component device, the energy produced just with the physical change of gas
Amount, does not produce toxic gas, while vibration noise is small；Cantilevered rock tunnel(ling) machine uses driven by power, emission-free discharge.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among claimed technical scheme scope of the invention.
Claims (11)
1. a kind of hard rock tunnel excavation construction method, it is characterised in that comprise the following steps：
S1：Free face (1) is dug along the bottom of tunnel tunnel face；
S2：Face central region more than free face (1) bores multiple blast holes (21)；
S3：Blaster is respectively provided with each blast hole (21), explosion is carried out；
S4：Mechanical cut is carried out to the rock mass beyond burst region to the region between face excavation contour line (4), tunnel is completed
The excavation in road.
2. hard rock tunnel excavation construction method as claimed in claim 1, it is characterised in that free face (1) in step S1
The length that depth excavates drilling depth and blaster according to single cycle is set, specially more than the small person 5cm of numerical value in the two~
10cm。
3. hard rock tunnel excavation construction method as claimed in claim 1, it is characterised in that the blast hole (21) in step S2 inclines
Obliquely.
4. hard rock tunnel excavation construction method as claimed in claim 3, it is characterised in that the blast hole (21) and free face
(1) angle of acute angle is less than 30 degree.
5. hard rock tunnel excavation construction method as claimed in claim 1, it is characterised in that blast hole (21) in step S2
Depth and the deep equality of free face (1).
6. hard rock tunnel excavation construction method as claimed in claim 1, it is characterised in that the blaster in step S3 is high pressure
Gas blast device.
7. hard rock tunnel excavation construction method as claimed in claim 6, it is characterised in that in the high pressure pneumatic component device
Gas is inert gas.
8. hard rock tunnel excavation construction method as claimed in claim 1, it is characterised in that each blaster in step S3 is simultaneously
Explosion.
9. hard rock tunnel excavation construction method as claimed in claim 1, it is characterised in that development machine is used in step S4 the bottom of from
Upward cut.
10. hard rock tunnel excavation construction method as claimed in claim 9, it is characterised in that the development machine is cantilevered tunnel
Road development machine.
11. hard rock tunnel excavation construction method as claimed in claim 1, it is characterised in that blast hole is set in step S2
(21) ratio that region accounts for whole face is more than and the region of cut is carried out in step S4 accounts for the ratio of whole face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709431.9A CN107269284A (en) | 2017-08-18 | 2017-08-18 | Hard rock tunnel excavation construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709431.9A CN107269284A (en) | 2017-08-18 | 2017-08-18 | Hard rock tunnel excavation construction method |
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| Publication Number | Publication Date |
|---|---|
| CN107269284A true CN107269284A (en) | 2017-10-20 |
Family
ID=60080226
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| CN201710709431.9A Pending CN107269284A (en) | 2017-08-18 | 2017-08-18 | Hard rock tunnel excavation construction method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266190A (en) * | 2017-12-29 | 2018-07-10 | 中铁隆工程集团有限公司 | A kind of hard rock tunnel construction method |
| CN109736825A (en) * | 2018-12-24 | 2019-05-10 | 中铁三局集团有限公司 | Super hard rock tunnel water drilling cooperates hydraulic splitting excavation construction method |
| CN110360906A (en) * | 2019-07-29 | 2019-10-22 | 华侨大学 | A kind of structure and method in the elevator region to be blasted for reducing ground vibration |
| CN110618249A (en) * | 2018-06-20 | 2019-12-27 | 核工业北京地质研究院 | Test method for geotechnical engineering excavation construction |
| CN113669069A (en) * | 2021-08-05 | 2021-11-19 | 中铁工程装备集团有限公司 | Mechanical excavation method for hard rock tunnel |
| CN114352300A (en) * | 2021-12-07 | 2022-04-15 | 江苏徐工工程机械研究院有限公司 | Digital drilling and blasting excavation system and excavation method |
| CN114485302A (en) * | 2022-02-21 | 2022-05-13 | 矿冶科技集团有限公司 | Loose blasting mining method for tunnel excavation face |
| CN114547721A (en) * | 2021-12-21 | 2022-05-27 | 沈阳工业大学 | Blasting control method for differential directional fracture of local area of deep-buried tunnel |
| CN115493466A (en) * | 2022-09-23 | 2022-12-20 | 中国人民解放军陆军工程大学 | Rock rapid blasting excavation method based on rod jet flow group |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108266190A (en) * | 2017-12-29 | 2018-07-10 | 中铁隆工程集团有限公司 | A kind of hard rock tunnel construction method |
| CN110618249A (en) * | 2018-06-20 | 2019-12-27 | 核工业北京地质研究院 | Test method for geotechnical engineering excavation construction |
| CN110618249B (en) * | 2018-06-20 | 2022-03-18 | 核工业北京地质研究院 | Test method for geotechnical engineering excavation construction |
| CN109736825A (en) * | 2018-12-24 | 2019-05-10 | 中铁三局集团有限公司 | Super hard rock tunnel water drilling cooperates hydraulic splitting excavation construction method |
| CN110360906A (en) * | 2019-07-29 | 2019-10-22 | 华侨大学 | A kind of structure and method in the elevator region to be blasted for reducing ground vibration |
| CN113669069A (en) * | 2021-08-05 | 2021-11-19 | 中铁工程装备集团有限公司 | Mechanical excavation method for hard rock tunnel |
| CN114352300A (en) * | 2021-12-07 | 2022-04-15 | 江苏徐工工程机械研究院有限公司 | Digital drilling and blasting excavation system and excavation method |
| CN114352300B (en) * | 2021-12-07 | 2024-02-02 | 江苏徐工工程机械研究院有限公司 | Digital drilling and blasting excavation system and excavation method |
| CN114547721A (en) * | 2021-12-21 | 2022-05-27 | 沈阳工业大学 | Blasting control method for differential directional fracture of local area of deep-buried tunnel |
| CN114485302A (en) * | 2022-02-21 | 2022-05-13 | 矿冶科技集团有限公司 | Loose blasting mining method for tunnel excavation face |
| CN114485302B (en) * | 2022-02-21 | 2024-01-19 | 矿冶科技集团有限公司 | Loose blasting mining method for tunnel excavation face |
| CN115493466A (en) * | 2022-09-23 | 2022-12-20 | 中国人民解放军陆军工程大学 | Rock rapid blasting excavation method based on rod jet flow group |
| CN115493466B (en) * | 2022-09-23 | 2023-10-24 | 中国人民解放军陆军工程大学 | Rapid rock blasting excavation method based on rod jet group |
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Application publication date: 20171020 |