CN110130974B - Multistage dust removal system for earth pressure/open double-mode shield construction - Google Patents
Multistage dust removal system for earth pressure/open double-mode shield construction Download PDFInfo
- Publication number
- CN110130974B CN110130974B CN201910574003.9A CN201910574003A CN110130974B CN 110130974 B CN110130974 B CN 110130974B CN 201910574003 A CN201910574003 A CN 201910574003A CN 110130974 B CN110130974 B CN 110130974B
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- Prior art keywords
- dust
- dust removal
- spray
- air duct
- belt conveyor
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- 239000000428 dust Substances 0.000 title claims abstract description 193
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 52
- 239000002893 slag Substances 0.000 claims abstract description 15
- 239000006185 dispersion Substances 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000003595 mist Substances 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 4
- 238000005453 pelletization Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000011435 rock Substances 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000630 rising effect 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a multistage dust removal system for earth pressure/open double-mode shield construction, which solves the problem of more dust in a 6 m-level earth pressure/open double-mode shield or hard rock TBM tunnel in the prior art. The invention comprises a front dust-removing spray system, a dust dispersion route dust-settling system and a rear dust-removing air duct dust-collecting system which are sequentially arranged in a shield machine; the front dust-removing part spray dust removing system comprises a first spray dust removing device arranged on a soil bin partition plate; the dust dispersion route dust settling system comprises a dust removal and cooling device and a second spray dust removal device, wherein the dust removal and cooling device is arranged at the center hob, and the second spray dust removal device is arranged at the slag hole of the driving box; and the dust collection part of the air pipe dust collection system at the rear dust collection position corresponds to the main machine belt conveyor. According to the invention, the dust lifting amount is reduced from the dust lifting position, the dust transmission process is blocked, the dust transmission is reduced, the suspended dust is sucked away from the dust outlet, the multistage blocking and dust falling are realized, the dust removing efficiency is improved, and the dust content in a tunnel is reduced.
Description
Technical Field
The invention relates to the technical field of dual-mode shield construction, in particular to a multistage dust removal system for earth pressure/open dual-mode shield construction.
Background
At present, 6 m-level soil pressure/open double-mode shield or hard rock TBM at home and abroad is limited in space at a host machine, a dust removing air pipe is mostly arranged above a front shield partition plate, the dust removing effect is not ideal, and dust generated from the upper parts of a driving box and a host machine belt conveyor is generally dispersed at a splicing machine and an equipment bridge. Even if the shield machine with larger diameter is provided with a special dust collection air pipe in the main drive, the problem of dust dispersion along the rotating speed of the belt conveyor is not solved by installing water spraying on the slag hole of the driving box. This phenomenon severely causes a severe in-tunnel construction environment: the breathing air is turbid, the observation sight is fuzzy, and the operations of splicing the duct pieces in the tunnel, secondary grouting and the like by constructors are seriously restricted. The factors cause great harm to the body and the mind of constructors, indirectly influence the construction efficiency, and also increase the risk of construction accidents.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides a multistage dust removal system for soil pressure/open double-mode shield construction, which solves the problem that 6 m-level soil pressure/open double-mode shield or hard rock TBM in the prior art cannot be provided with dust removal air pipes in a limited space and has more dust in a tunnel.
The technical scheme of the invention is realized as follows: a multistage dust removal system for earth pressure/open double-mode shield construction comprises a spray dust removal system at a front dust-raising position, a dust dispersion route dust removal system and a rear dust-raising position air pipe dust collection system which are sequentially arranged in a shield machine; the front dust-removing part spray dust removing system comprises a first spray dust removing device arranged on a soil bin partition plate; the dust dispersion route dust settling system comprises a dust removal and cooling device and a second spray dust removal device, wherein the dust removal and cooling device is arranged at the center hob, and the second spray dust removal device is arranged at the slag hole of the driving box; and the dust collection part of the air pipe dust collection system at the rear dust collection position corresponds to the main machine belt conveyor.
The second spraying dust collector is including setting up rubber dust board, spray subassembly and the dust removal chain on the driving box, and rubber dust board is located driving box front portion, and the dust removal chain is located driving box rear portion, and spray subassembly is located between rubber dust board and the dust removal chain.
The first spray dust removal device is a water mist spray head assembly, the water mist spray head assembly is connected with an external water source through a water pipe, and at least one group of water mist spray head assemblies are arranged on the soil bin partition plate.
The dust collection system of the rear dust-collecting air pipe comprises a special-shaped air pipe assembly, the front end of the special-shaped air pipe assembly corresponds to a main machine belt conveyor, the special-shaped air pipe assembly extends backwards to penetrate through the assembling machine and is connected with a negative pressure soft air pipe assembly arranged on the assembling machine, the rear part of the special-shaped air pipe assembly is connected with a dry dust remover and a dust removal fan, and the dry dust remover and the dust removal fan are respectively arranged on a trailer.
The special-shaped air duct assembly comprises an arc-surface air duct, a rectangular air duct and a circular air duct, wherein the arc-surface air duct is connected with the rectangular air duct through a first transition connector, the rectangular air duct is connected with the circular air duct through a second transition connector, the arc-surface air duct is positioned above a main machine belt conveyor, and the circular air duct is arranged on an equipment bridge in a penetrating mode.
The lower surface of the cambered surface air pipe is provided with a plurality of dust collection holes, and the negative pressure soft air pipe assembly adopts a telescopic negative pressure soft air pipe.
The tail of the main machine belt conveyor is provided with at least one group of third dust removal spraying devices, and the third dust removal spraying devices are positioned at the transfer slag position of the main machine belt conveyor and the rear matched belt conveyor.
The third dust removal atomizer is a water mist spray head assembly, and the water mist spray head assembly is connected with an external water source through a water pipe.
According to the invention, dust collection amount is reduced from a dust collection position, dust transmission is blocked and dust transmission is reduced, suspended dust is sucked away from a dust outlet, multistage blocking and dust fall are realized, dust collection efficiency is improved, dust collection amount in a tunnel is greatly reduced, and working environment is improved. The invention can complete the arrangement of the air pipes in a limited space, has simple structure, low cost and good dust removal effect, greatly improves the construction environment of the earth pressure/open double-mode shield in an open mode, is a great innovation of dust removal in tunnel construction, and has higher popularization value.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required for the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the first spray dust collector arrangement of the present invention.
Fig. 3 is a schematic diagram of the arrangement of a second spray dust collector of the invention.
FIG. 4 is a schematic illustration of the profiled air duct assembly arrangement of the present invention.
FIG. 5 is a cross-sectional view of the cambered surface air duct and dust collection hole distribution diagram of the invention.
Fig. 6 is a schematic view of the arrangement of a third spray dust collector of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-3, in embodiment 1, a multistage dust removal system for earth pressure/open dual-mode shield construction is found through research and field observation that two main sources of larger dust in the earth pressure/open dual-mode shield construction are: dust generation and dust dispersion. The dust-forming part is mainly a slag outlet of the driving box, slag outlet of the main machine belt conveyor and slag receiving part at the tail part of the rear matched belt conveyor; the dust dispersing place is mainly the dust dispersing place caused by the rotating speed on the upper parts of the main machine belt conveyor and the rear matched belt conveyor. An effective dust removing mode is formulated aiming at different dust-forming reasons, and the multistage dust removing system for earth pressure/open double-mode shield construction comprises a front dust-forming part spray dust removing system, a dust dispersion route dust removing system and a rear dust-forming part air pipe dust collecting system which are sequentially arranged in a shield machine 3; the front dust-raising spray dust removing system comprises a first spray dust removing device 2 arranged on a soil bin partition plate 1, wherein the first spray dust removing device 2 is a water mist spray head assembly, the water mist spray head assembly is connected with an external water source through a water pipe, at least one group of water mist spray head assemblies are arranged on the soil bin partition plate 1, and the spray area can be increased according to the on-site arrangement of a plurality of water mist spray head assemblies. When the shield tunneling machine is tunneling in a hard rock or open mode, the cutter head rotates to cut the tunnel face, and a large amount of dust is generated when the cut slag falls onto the main machine belt conveyor 5 along the slag chute. If no dust fall measures are taken, dust can be rapidly spread to the rear spliced duct piece area along with the rotating speed of the main machine belt conveyor 5. Therefore, the water mist is sprayed to the first spray dust removing devices, and the sprayed mist water vapor and dust are condensed, so that the purpose of reducing the dust in the soil bin is achieved to the greatest extent. The dust dispersion route dust fall system comprises a dust removal and cooling device 4 and a second spray dust removal device 6, wherein the dust removal and cooling device 4 is arranged at the center hob 17, the tail area of the belt conveyor 5 positioned at the center of the driving box is a main channel for dust to be dispersed to the rear part, and the dust removal and cooling device 4 is additionally arranged at the center hob for reducing dust dispersion, so that not only is part of dust reduced, but also the purpose of cooling the center hob is achieved. The second spray dust removing device 6 is arranged at the slag hole of the driving box 18, and dust is blocked and removed by the second spray dust removing device, so that the dust discharge amount can be greatly reduced. The dust collection part of the air pipe dust collection system at the rear dust collection position corresponds to the main machine belt conveyor 5, and dust at the rear dust collection position is sucked out through the air pipe dust collection system.
Preferably, the second spray dust removing device 6 comprises a rubber dust baffle 601, a spray assembly 602 and a dust removing chain 603, wherein the rubber dust baffle 601 is arranged on the front part of the driving box 18 and is positioned at the rear part of a slag hole of the driving box, so that the dust spreading speed and spreading area are reduced, the dust removing chain 603 is positioned at the rear part of the driving box 18, and the dust removing chain 603 can not only condense suspended dust and moisture, but also reduce the height of slag (reduce the dust rising amount caused by rotating speed); the spraying component 602 is located between the rubber dust board 601 and the dust removing chain 603, and is connected with an external water source through a pipeline, so that dust amount is reduced. Through the three dust blocking and removing processes, the dust discharge amount and the dust dispersion speed can be greatly reduced, and the dust discharge amount can be reduced.
As shown in fig. 4-6, in embodiment 2, a multi-stage dust removal system for earth pressure/open dual-mode shield construction is provided, the air duct dust collection system at the rear dust-raising position comprises a special-shaped air duct assembly 7, and the front end of the special-shaped air duct assembly 7 corresponds to a main machine belt conveyor 5 and is used for absorbing scattered dust generated in the carrying process of the main machine belt conveyor. The special-shaped air pipe assembly 7 extends backwards to pass through the assembling machine 8 and is connected with a negative pressure soft air pipe assembly 9 arranged on the assembling machine 8, the rear part of the special-shaped air pipe assembly 7 is connected with a dry dust remover 12 and a dust removing fan 13, and the dry dust remover 12 and the dust removing fan 13 are respectively arranged on the trailer 11. The trailer can adopt one or more, sets up as required, and dust removal fan 13 provides power for back dust-collecting department tuber pipe dust absorption system, and the scattered dust that main machine belt feeder produced is absorbed to dust remover department under dust removal fan's effect through dysmorphism tuber pipe assembly, negative pressure hose assembly, and then realizes the dispersion of dust.
Preferably, the special-shaped air duct assembly 7 includes an arc-surface air duct 701, a rectangular air duct 703 and a circular air duct 705, the arc-surface air duct 701 is connected with the rectangular air duct 703 through a first transition connector 702, the first transition connector 702 is an arc-surface rectangular connector, the rectangular air duct 703 is connected with the circular air duct 705 through a second transition connector 704, and the second transition connector 704 is a rectangular-circular connector. The arrangement of the different air pipes does not affect the normal work of other structures, ensures the dust removal area of the air pipes, and realizes the installation of the air pipes in a limited space. The cambered surface air pipe 701 is positioned above the main machine belt conveyor 5, and the circular air pipe 705 is arranged on the equipment bridge 10 in a penetrating way. The lower surface of the cambered surface air pipe 701 is provided with a plurality of dust absorption holes 706, the cambered surface air pipe 701 absorbs dust into the special-shaped air pipe through the dust absorption holes, and the cambered surface design of the cambered surface air pipe 701 increases the dust absorption surface, so that the dust removal efficiency is improved. The negative pressure soft air pipe assembly 9 adopts a telescopic negative pressure soft air pipe, and a negative pressure soft air pipe bracket arranged on a main beam of the assembling machine 8 connects the telescopic negative pressure soft air pipe through a sliding towing, so that the main machine belt conveyor can be retreated by the compressible negative pressure soft air pipe.
Preferably, at least one group of third dust-removing spraying devices 15 is arranged at the tail of the main machine belt conveyor 5, and the third dust-removing spraying devices 15 are positioned at the slag-transferring positions of the main machine belt conveyor 5 and the rear matched belt conveyor 16. The third dust removal atomizer 15 is a water mist spray head assembly, and the water mist spray head assembly is connected with an external water source through a water pipe. A certain amount of dust is generated at the position where the main machine belt conveyor 5 and the rear supporting belt conveyor 16 transfer slag, and a plurality of dust removing spraying devices 15 and belt conveyor cleaning devices are arranged for the position, so that the dust is almost limited to fall to the rear supporting belt conveyor and the bottom of a tunnel in the space.
Other structures are the same as in embodiment 1.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. A multistage dust pelletizing system that earth pressure open bimodulus shield constructs construction usefulness which characterized in that: comprises a front dust-removing spray system, a dust dispersion route dust-settling system and a rear dust-removing air duct dust-collecting system which are sequentially arranged in a shield machine (3); the front dust-removing spray system comprises a first spray dust-removing device (2) arranged on a soil bin partition plate (1); the dust dispersion route dust fall system comprises a dust removal and cooling device (4) and a second spray dust removal device (6), wherein the dust removal and cooling device (4) is arranged at a center hob (17), and the second spray dust removal device (6) is arranged at a slag hole of a driving box (18); the dust collection part of the rear dust collection part air pipe dust collection system corresponds to a main machine belt conveyor (5);
the first spray dust removing device (2) is a water mist spray head assembly, the water mist spray head assembly is connected with an external water source through a water pipe, and at least one group of water mist spray head assemblies are arranged on the soil bin partition board (1);
the dust collection system of the rear dust-collecting part wind pipe comprises a special-shaped wind pipe assembly (7), the front end of the special-shaped wind pipe assembly (7) corresponds to a main machine belt conveyor (5), the special-shaped wind pipe assembly (7) extends backwards to pass through a splicing machine (8) and is connected with a negative pressure soft wind pipe assembly (9) arranged on the splicing machine (8), the rear part of the special-shaped wind pipe assembly (7) is connected with a dry dust remover (12) and a dust removing fan (13), and the dry dust remover (12) and the dust removing fan (13) are respectively arranged on a trailer (11);
the special-shaped air duct assembly (7) comprises an arc-surface air duct (701), a rectangular air duct (703) and a circular air duct (705), wherein the arc-surface air duct (701) is connected with the rectangular air duct (703) through a first transition connector (702), the rectangular air duct (703) is connected with the circular air duct (705) through a second transition connector (704), the arc-surface air duct (701) is positioned above a host machine belt conveyor (5), and the circular air duct (705) is arranged on the equipment bridge (10) in a penetrating mode.
2. The multistage dust removal system for earth pressure/open dual mode shield construction of claim 1, wherein: the second spray dust removal device (6) comprises a rubber dust baffle (601), a spray assembly (602) and a dust removal chain (603) which are arranged on the driving box (18), wherein the rubber dust baffle (601) is positioned at the front part of the driving box (18), the dust removal chain (603) is positioned at the rear part of the driving box (18), and the spray assembly (602) is positioned between the rubber dust baffle (601) and the dust removal chain (603).
3. The multistage dust removal system for earth pressure/open dual mode shield construction of claim 1, wherein: the lower surface of the cambered surface air pipe (701) is provided with a plurality of dust collection holes (706), and the negative pressure soft air pipe assembly (9) adopts a telescopic negative pressure soft air pipe.
4. A multistage dust removal system for earth pressure/open dual mode shield construction according to claim 1 or 3, characterized in that: the tail of the main machine belt conveyor (5) is provided with at least one group of third dust removal spraying devices (15), and the third dust removal spraying devices (15) are positioned at the transfer slag position of the main machine belt conveyor (5) and the rear matched belt conveyor (16).
5. The multistage dust removal system for earth pressure/open dual mode shield construction of claim 4, wherein: the third dust removal atomizer (15) is a water mist spray head assembly, and the water mist spray head assembly is connected with an external water source through a water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910574003.9A CN110130974B (en) | 2019-06-28 | 2019-06-28 | Multistage dust removal system for earth pressure/open double-mode shield construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910574003.9A CN110130974B (en) | 2019-06-28 | 2019-06-28 | Multistage dust removal system for earth pressure/open double-mode shield construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110130974A CN110130974A (en) | 2019-08-16 |
| CN110130974B true CN110130974B (en) | 2024-03-08 |
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ID=67566553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910574003.9A Active CN110130974B (en) | 2019-06-28 | 2019-06-28 | Multistage dust removal system for earth pressure/open double-mode shield construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110130974B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233321A (en) * | 2021-11-11 | 2022-03-25 | 中铁隧道集团二处有限公司 | Shield constructs quick-witted dregs eduction gear of dust removal function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07133698A (en) * | 1993-11-09 | 1995-05-23 | Taisei Corp | Shield excavating method |
| CN102383805A (en) * | 2011-10-19 | 2012-03-21 | 中铁隧道装备制造有限公司 | Mixed TBM (Tunnel Boring Machine) with multiple-boring mode and tunnel supporting mode |
| CN106194242A (en) * | 2016-09-06 | 2016-12-07 | 中铁二十四局集团南昌铁路工程有限公司 | A kind of tunnel dust pelletizing system |
| CN106640106A (en) * | 2017-02-23 | 2017-05-10 | 淮南矿业(集团)有限责任公司 | Mining whole-section hard rock tunneling machine and circulative tunneling method |
| CN206508729U (en) * | 2017-01-13 | 2017-09-22 | 重庆交通建设(集团)有限责任公司 | A kind of dust removal by ventilation equipment used during shield-tunneling construction |
| CN108756913A (en) * | 2018-08-14 | 2018-11-06 | 沈阳天安科技股份有限公司 | A kind of small-sized mining hard rock shield excavation machine |
| CN210068231U (en) * | 2019-06-28 | 2020-02-14 | 中铁工程装备集团有限公司 | Multistage dust pelletizing system of open bimodulus shield construction usefulness of soil pressure |
-
2019
- 2019-06-28 CN CN201910574003.9A patent/CN110130974B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07133698A (en) * | 1993-11-09 | 1995-05-23 | Taisei Corp | Shield excavating method |
| CN102383805A (en) * | 2011-10-19 | 2012-03-21 | 中铁隧道装备制造有限公司 | Mixed TBM (Tunnel Boring Machine) with multiple-boring mode and tunnel supporting mode |
| CN106194242A (en) * | 2016-09-06 | 2016-12-07 | 中铁二十四局集团南昌铁路工程有限公司 | A kind of tunnel dust pelletizing system |
| CN206508729U (en) * | 2017-01-13 | 2017-09-22 | 重庆交通建设(集团)有限责任公司 | A kind of dust removal by ventilation equipment used during shield-tunneling construction |
| CN106640106A (en) * | 2017-02-23 | 2017-05-10 | 淮南矿业(集团)有限责任公司 | Mining whole-section hard rock tunneling machine and circulative tunneling method |
| CN108756913A (en) * | 2018-08-14 | 2018-11-06 | 沈阳天安科技股份有限公司 | A kind of small-sized mining hard rock shield excavation machine |
| CN210068231U (en) * | 2019-06-28 | 2020-02-14 | 中铁工程装备集团有限公司 | Multistage dust pelletizing system of open bimodulus shield construction usefulness of soil pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110130974A (en) | 2019-08-16 |
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