CN110230963A - A kind of underground engineering erosion control noise reduction dust-separation shotfiring safety compound protection method - Google Patents
A kind of underground engineering erosion control noise reduction dust-separation shotfiring safety compound protection method Download PDFInfo
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- CN110230963A CN110230963A CN201910564269.5A CN201910564269A CN110230963A CN 110230963 A CN110230963 A CN 110230963A CN 201910564269 A CN201910564269 A CN 201910564269A CN 110230963 A CN110230963 A CN 110230963A
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- 238000000034 method Methods 0.000 title claims abstract description 28
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- 230000003628 erosive effect Effects 0.000 title claims abstract description 20
- 230000009467 reduction Effects 0.000 title claims abstract description 19
- 238000000926 separation method Methods 0.000 title claims abstract description 19
- 238000005422 blasting Methods 0.000 claims abstract description 125
- 230000001681 protective effect Effects 0.000 claims abstract description 60
- 230000036961 partial effect Effects 0.000 claims abstract description 20
- 238000004880 explosion Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 239000011490 mineral wool Substances 0.000 claims description 26
- 229910052742 iron Inorganic materials 0.000 claims description 24
- 238000004873 anchoring Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 230000002441 reversible effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 18
- 230000035939 shock Effects 0.000 abstract description 11
- 238000009412 basement excavation Methods 0.000 abstract description 8
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 230000009172 bursting Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000009514 concussion Effects 0.000 description 2
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- 238000007363 ring formation reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to blasting safety protection fields, more particularly to a kind of underground engineering erosion control noise reduction dust-separation shotfiring safety compound protection method, include the following steps: 1) to arrange flyrock protection stratum reticulare in explosion area edge side, flyrock protection stratum reticulare is used to intercept the blasting flyrock that partial size is greater than 300mm, protective facing, load-bearing skeleton, screen layer are arranged in after flyrock protection stratum reticulare at the position 5-7m, the blasting flyrock for being greater than 8mm for intercepting partial size；2) arrangement of blasting impact protective device: blasting impact protective device is set to after blasting flyrock protective device at about 2-3m; it is less than the blasting flyrock of 8mm for Air blast wave and noise, the protection of blasting dust and interception partial size; blasting flyrock can be intercepted using the shotfiring safety compound protection method completely; effective attenuation Blasting shock wave superpressure and prevent blasting dust from spilling into protected area; the means of defence is used simultaneously; single blasting scale can be increased, blasting cost is reduced and improves Blasting Excavation work efficiency.
Description
Technical field
The present invention relates to blasting safety protection fields, and in particular to a kind of underground engineering erosion control noise reduction dust-separation shotfiring safety is multiple
Close means of defence.
Background technique
In hydropower station expansion engineering, newly-increased unit is typically located at former underground power house generating set side, using digging
Original underground power house cavern method arranges newly-increased generating set system, and during hydropower station expansion engineering construction, former power station needs to guarantee
It operates normally, therefore Enlargement excavation does not allow to influence the normal operation of original unit, must not also influence to run people in Power Plant
The normal work of member.
Since the expansion machine Blasting Excavation work surface of underground power house and original generating set and Central Control Room are located at same underground sky
Between, bursting work identity distance is closer from protected object, and for the underground space due to its limitation, the ill-effect that explosion generates faces it
Nearly working region influences maximum, and wherein concussion of blasting can be controlled effectively using short-delay blasting, blasting flyrock, explosion air
Impact involves the ill-effects such as noise, blasting dust, although it is capped to block length, bursting work face big gun by control blast hole
Equal measures, available certain improvement, but flow chart is cumbersome, construction efficiency is lower, cannot prevent completely blasting flyrock and
It is unable to effective protection blasting impact and involves the influence of the ill-effects such as noise, blasting dust, in Underground Engineering Blasting construction, there is needle
To documents and materials such as explosion Propagation Law of Mine Gas researchs in concussion of blasting control, tunnel, but there is no for blasting flyrock, explosion
Air-impingement involve noise, blasting dust shotfiring safety composite protective device effective measures, bursting work face with protected
Shield electromechanical equipment and staff Operational Zone exist together under the conditions of a underground space, in order to guarantee electromechanical equipment and staff
Operate normally safety, blasting flyrock, Air blast wave and noise, blasting dust protective device must have it is certain
Impact resistance and erosion control noise reduction dust-separation function and convenient for operation.
Present invention combination hydropower station expansion underground engineering structure feature, designs a kind of underground engineering erosion control noise reduction dust-separation explosion
Safe composite protective device, it is therefore an objective to solve hydropower station expansion Underground powerhouse excavation phase under the premise of not reducing construction efficiency
Between, blasting flyrock, blasting impact involve the effective protection problem of noise and blasting dust, it is ensured that underground workshop digs quick-fried
Broken construction does not influence the normal work of former generating set normal operation and operations staff.
Based on above-mentioned prior art, the applicant has made lasting and beneficial exploration and design repeatedly, and carries out
The test of non-finite number of time has finally found the method for solving above-mentioned technical problem and forms technology described below
Scheme.
Summary of the invention
To solve problem of the prior art, the present invention provides a kind of underground engineering erosion control noise reduction dust-separation shotfiring safety is compound
Means of defence.
In order to achieve the above object, the invention adopts the following technical scheme: a kind of underground space erosion control noise reduction dust-separation explosion
Safe compound protection method, include the following steps: 1) include blasting flyrock protective device arrangement: in explosion area edge side cloth
Flyrock protection stratum reticulare is set, flyrock protection stratum reticulare is used to intercept the blasting flyrock that partial size is greater than 300mm, by protective facing, load-bearing bone
Frame, screen layer are arranged in after flyrock protection stratum reticulare, the blasting flyrock for being greater than 8mm for intercepting partial size；
2) arrangement of blasting impact protective device: blasting impact protective device is set to after blasting flyrock protective device about
At 2-3m, the blasting flyrock of 8mm is less than for Air blast wave and noise, the protection of blasting dust and interception partial size, it is quick-fried
Broken surge guard device rear portion is by protection zone.
The blasting flyrock protective device is set to blast area side, and blasting flyrock protective device rear portion is provided with explosion punching
Protective device is hit, blasting flyrock protective device includes flyrock protection stratum reticulare, protective facing, load-bearing skeleton, screen layer, protective facing
It is set to flyrock protection stratum reticulare rear portion, the inclination angle of protective facing and horizontal plane is 81 degree and tilts and set towards blast area side
It sets, protective facing side is mutually fixedly connected with load-bearing skeleton, and screen layer is fixed on load-bearing skeleton side.
The flyrock protection stratum reticulare is the annular passive protection net of aperture 300mm, and flyrock protection stratum reticulare upper and lower part is equal
It is fixed with flyrock protection net anchor pole.
The protective facing includes protection reinforcing bar stratum reticulare, diamond shape passive protection net, protects steel mesh layer choosing 16 200* of Φ
The steel mesh of 200mm.
The load-bearing skeleton is made of I20 I-steel and 10# channel steel, is distributed in groined type.
It is the sieve of 8mm that the screen layer, which selects bore dia, for stopping partial size to be greater than the slungshot of 65mm~8mm.
The load-bearing skeleton end is fixed with skeleton anchor pole, and skeleton anchor pole is fixed on underground chamber palisades, skeleton anchor pole
Diameter is 28mm.
The load-bearing skeleton is fixedly connected with girder truss, and girder truss is fixedly connected by wirerope with vault anchoring pile, vault
Anchoring pile and wirerope take up reinforcing at the girder truss back side, and vault anchoring pile diameter is 28mm.
The blasting impact protective device includes iron sheet watt layer, support frame, rock wool layer, steel grid, and iron sheet watt layer is set
It is disposed adjacent to the one side of blast area, iron sheet watt layer is fixed on support frame, iron sheet watt layer choosing 8# galvanized wire and support frame phase
It is fixedly connected, support frame side is fixed in rock wool layer laying, and steel grid is fixedly connected with rock wool layer reverse side, steel mesh
Lattice are used to protect rock wool layer and fix, and steel grid size selects 16@400*400mm of Φ, steel grid end and support rib
Frame is welded and fixed, and for protecting and fixing rock wool layer, iron sheet watt layer is formed by monolithic iron sheet watt overlap joint, and monolithic iron sheet watt height is
70-90cm, clinch is provided between monolithic iron sheet watt, and clinch length is 10cm.
The support frame is made of I20 I-steel and 10# channel steel, is distributed in groined type, support frame end is fixed with
Support frame dowel, support frame dowel are fixed on underground chamber palisades, and support frame dowel diameter is 28mm, rock wool layer choosing
With the rock wool of 90mm thickness.
Compared with prior art, advantageous effect of the invention is: the present invention selects suitable erosion control noise attenuation material, effectively solves
Blasting flyrock, blasting impact involve the protection question of noise and blasting dust, can be complete using the shotfiring safety compound protection method
It is complete to intercept blasting flyrock, it effective attenuation Blasting shock wave superpressure and prevents blasting dust from spilling by protected area, adopts simultaneously
With the means of defence, single blasting scale can be increased, reduce blasting cost and improves Blasting Excavation work efficiency.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon.
Fig. 1 is schematic structural view of the invention.
Fig. 2 is borehole blasting flyrock protection apparatus structure schematic diagram of the present invention.
Fig. 3 is borehole blasting surge guard apparatus structure schematic diagram of the present invention.
Fig. 4 is structural schematic diagram at A in Fig. 1.
Fig. 5 is structural schematic diagram.
Fig. 6 is structural schematic diagram.
Specific embodiment
The present invention is described in further details below by embodiment, embodiment is only used to illustrate the present invention, and unlimited
The scope of the present invention processed.
A kind of underground space erosion control noise reduction dust-separation shotfiring safety compound protection method as shown in figures 1 to 6, including walk as follows
It is rapid: 1) to include by the arrangement of blasting flyrock protective device 1: arranging flyrock protection stratum reticulare 11, slungshot in 10 edge side of blast area
Protection stratum reticulare 11 is used to intercept the blasting flyrock that partial size is greater than 300mm, by protective facing 12, load-bearing skeleton 13,14 cloth of screen layer
It sets after the flyrock protection stratum reticulare 11 at the position 5-7m, is specifically 6m, the blasting flyrock for being greater than 8mm for intercepting partial size is
Guarantee that its blasting protection structure is not destroyed, expanding the first position by workshop centre of machine workshop excavation, and it is quick-fried to retain first layer
About 4m range rock mass does not excavate temporarily on the outside of broken slungshot intercept net, when excavating clipping room floor elevation or less, then using control
Blasting technique horizontal slice processed is excavated, and first layer blasting flyrock protective net is extended downwardly installation to clipping room elevation later.
2) blasting impact protective device 2 arrangement of blasting impact protective device 2: is set to blasting flyrock protective device 1
Later about at 2-3m, intercepts blasting flyrock of the partial size less than 8mm and Blasting shock wave, noise and dust and progress safety are prevented
Shield.2 rear portion of blasting impact protective device is provided with by protection zone 9.
Blasting flyrock protective device 1 is set to 10 side of blast area, and 1 rear portion of blasting flyrock protective device is provided with explosion punching
Protective device 2 is hit, blasting impact protective device 2 is 2-3m at a distance from blasting flyrock protective device 1, to prevent partial size from being less than
The slungshot of 8mm, which is flown into, by protection zone, is avoided Blasting shock wave, noise caused by explosion and blasting dust from influencing to be protected
Area works normally, and arranges that preventing explosion impact involves the explosion punching of noise, blasting dust at 2~3m after blasting flyrock protective device
Hit protective device 2.
Blasting flyrock protective device 1 includes flyrock protection stratum reticulare 11, protective facing 12, load-bearing skeleton 13, screen layer 14, is prevented
Armour layer 12 is set to 11 rear portion of flyrock protection stratum reticulare, and the inclination angle of protective facing 12 and horizontal plane is 81 degree and towards blast area
10 sides are obliquely installed, and 12 side of protective facing is fixedly connected with 13 phase of load-bearing skeleton, and screen layer 14 is fixed on load-bearing skeleton 13
Side.
Flyrock protection stratum reticulare 11 is the annular passive protection net of aperture 300mm, and flyrock protection stratum reticulare 11 selects SNS passively to prevent
Protective net is the annular passive protection net of aperture 300mm, and effect is the blasting flyrock for stopping partial size to be greater than 300mm, sufficiently benefit
With the easy spreadability and high protecting against shock ability of the high tensile metal flexible material of SNS passive protection net, makes blasting flyrock and intercept master
Component is wanted, SNS passive protection net is also equipped with light and easy processing feature, and the letter of the lightness installation and maintenance of system may be implemented
It is single quick.The TECCO-65 type grid of selection Bruch (Chengdu) Engineering Co., Ltd. (GCCL) production of passive protection net and rule
Lattice are the ROCCO ring network of 5 × 3/4/5/6/7m, and TECCO-65 diamond shape grid is currently used high-tensile steel wires grid,
Zinc-coated wire for intensity not less than 1770MPa, diameter 3mm weaves without knot, and steel wire end knot is fixed, diamond-shaped meshes
Inscribed circle diameter 65mm, ROCCO ring network, the TECCO coil of wire knot number using intensity not less than 1770MPa, diameter 3mm
Circle cyclization is simultaneously mutually socketed to form, and annular distance diameter is generally 300mm, disk ring formation number according to the difference of stone blocking net model without
Together, finished net block specifications are generally 5 × 3/4/5/6/7m, 10 side of Nearby Blasting area arrangement, using the crown excavated and
Palisades, 11 upper and lower part of flyrock protection stratum reticulare are respectively and fixedly provided with flyrock protection net anchor pole 111,111 diameter of flyrock protection net anchor pole
For 28mm.
Protective facing 12 includes protection reinforcing bar stratum reticulare 121, diamond shape passive protection net 122, and protection reinforcing bar stratum reticulare 121 selects Φ
The steel mesh of 16@200*200mm, the mesh of diamond shape passive protection net 122 are 65mm.
Load-bearing skeleton 13 is made of I20 I-steel and 10# channel steel, is distributed in groined type.
It is the sieve of 8mm that screen layer 14, which selects bore dia, for stopping partial size to be greater than the slungshot of 65mm~8mm.
13 end of load-bearing skeleton is fixed with skeleton anchor pole 131, and skeleton anchor pole 131 is fixed on underground chamber palisades, skeleton
131 diameter of anchor pole is 28mm.
Girder truss 15 is fixedly connected with load-bearing skeleton 13, guarantees the rigidity of load-bearing skeleton 13, and girder truss 15 passes through wirerope
151 with vault anchoring pile 152 is fixed connects, vault anchoring pile 151 and wirerope 152 take up reinforcing, vault at 15 back side of girder truss
152 diameter of anchoring pile is 28mm.
Blasting impact protective device 2 includes iron sheet watt layer 21, support frame 22, rock wool layer 23, steel grid 24,
Iron sheet watt layer 21 is disposed in proximity to the one side of blast area 10, and iron sheet watt layer 21 is fixed on support frame 22, iron sheet watt layer
21 selection 8# galvanized wires are fixedly connected with 22 phase of support frame, and 22 side of support frame, steel grid are fixed in the laying of rock wool layer 23
24 are fixedly connected with 23 reverse side of rock wool layer, and steel grid 24 is used to protect rock wool layer 23 and fix, 24 ruler of steel grid
Very little 16@400*400mm of selection Φ, 24 end of steel grid is welded and fixed with support frame 22, for protecting and fixing rock wool layer
23。
Iron sheet watt layer 21 is formed by the overlap joint of monolithic iron sheet watt 211, and 211 height of monolithic iron sheet watt is 70-90cm, is specifically
80cm, clinch 212 is provided between monolithic iron sheet watt 211, and 212 length of clinch is 10cm.
Support frame 22 is made of I20 I-steel and 10# channel steel, is distributed in groined type, 22 end of support frame is fixed with
Support frame dowel 221, support frame dowel 221 are fixed on underground chamber palisades, and 221 diameter of support frame dowel is
28mm。。
Rock wool layer 23 selects the rock wool of 90mm thickness, and rock wool has the characteristics that fire prevention, fire-retardant, compressible and impermeable dirt of breathing freely,
The energy of Blasting shock wave generation can be eliminated, noise of blasting and barrier blasting dust etc. are reduced.The rock wool main performance of selection
Index: thermal coefficient tests 70 ± 5 DEG C of mean temperature no more than 0.44w/m.k(), 650 DEG C of maximum operation (service) temperature.Preferred rock
The cotton back side is fixed with galvanized wire net cover, to guarantee that rock wool is not torn or destroys under the action of multiple Blasting shock wave, in rock wool
The back side add galvanized wire net cover, guarantee that rock wool layer still keeps globality after repeat impact.
The use condition of shotfiring safety compound protection method:
The present invention is based under underground space bursting work environment, for explosion dispersion, Air blast wave and noise, explosion
Therefore the security protection of the Harmful effects from blasting such as dust need to meet the following conditions using this shotfiring safety compound protection method.
(1) bursting work area with same underground activities space is in by protection zone, and bursting work area with protected
There is no the shelters such as other buildings, works between area；
(2) bursting work area has nearby formed construction channel or ventilation smoke exhaust channel, guarantees that Blasting shock wave superpressure can be released effectively
It puts, and compound blasting protection structure cloth postpones the ventilation smoke exhaust for not influencing bursting work area；
(3) there are other construction channels in bursting work area, will not influence applying for bursting work area after compound blasting protection structure installation
Industry and traffic is logical.
Application examples:
Zambia (Zambia) Ka Liba (kariba) power station north bank expands machine engineering and is located at what Zambia had a common boundary with Zimbabwe
On Zambezi, expand the underground power station that machine engineering is installation 2*180MW.Expansion machine workshop is connected with former underground power house, and shares original
The clipping room of workshop, wherein expanding the long 51.9m of machine underground power house, width 25.8m, high 50m, the 4# unit distance in genuine room expands machine workshop
Edge Distance about 40m, expand machine workshop and excavate about 60,000 sides of total side's amount.Expansion machine workshop arch has 1# access tunnel to be interlinked to the outside with hole, is
Ventilation smoke exhaust and Blasting shock wave overpressure release provide channel；Genuine room can be directly entered into factory's access tunnel by genuine room
Clipping room provides construction channel for this composite protection structure.
In this project, compound blasting protection method uses at the clipping room position expanded between machine workshop and genuine room, the
One layer of blasting flyrock interception structure is arranged in explosion area edge, and second to the 4th layer of blasting flyrock interception structure is arranged in first layer
The position about 6m after blasting flyrock protective net, the blasting flyrock for being greater than 8mm for intercepting partial size.First layer blasting flyrock intercept net
The main blasting flyrock for intercepting partial size and being greater than 300mm expands machine workshop and excavates first to guarantee that its blasting protection structure is not destroyed
By position among workshop, and retain about 4m range rock mass on the outside of first layer blasting flyrock intercept net and do not excavate temporarily, wait open
When digging clipping room floor elevation or less, then using Controlled blasting technique horizontal slice excavation, later by first layer blasting flyrock
Protective net extends downwardly installation to clipping room elevation.
Blasting impact involves noise, blasting dust safeguard structure is arranged in after blasting flyrock interception structure at about 2 ~ 3m,
Intercept blasting flyrock of the partial size less than 8mm and to Blasting shock wave, noise and dust and progress security protection
During expanding machine engineering Underground powerhouse excavation, the blasting safety protection method, blasting flyrock, explosion air are used for the first time
Impact involves noise and blasting dust has obtained effective control, and Blasting shock wave superpressure attenuation rate reaches 95% or more, not to original
The normal work of the operation of Power Plant electromechanical equipment and operations staff impact.
In conjunction with comprehensive vibration reducing measure and the application of this blasting safety protection method, compared with conventional blasting method safety prevention measure,
The blasting scale of single is increased, drilling amount and explosive dosage are reduced, decreases total explosion number, it is more conventional
About 67.5 ten thousand dollars of construction method save the cost, expands machine workshop and excavate duration quickening about 2 months.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to above embodiments institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection scope of technical solution of the present invention.
Claims (10)
1. a kind of underground space erosion control noise reduction dust-separation shotfiring safety compound protection method, characterized by the following steps: 1)
Including by the arrangement of blasting flyrock protective device: arranging that flyrock protection stratum reticulare, flyrock protection stratum reticulare are used in explosion area edge side
In intercept partial size be greater than 300mm blasting flyrock, by protective facing, load-bearing skeleton, screen layer be arranged in flyrock protection stratum reticulare it
Afterwards, the blasting flyrock for being greater than 8mm for intercepting partial size；
2) arrangement of blasting impact protective device: blasting impact protective device is set to after blasting flyrock protective device about
At 2-3m, the blasting flyrock for being less than 8mm for intercepting partial size, blasting impact protective device rear portion is by protection zone.
2. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 1, it is characterised in that:
The blasting flyrock protective device is set to blast area side, and blasting flyrock protective device rear portion is provided with blasting impact protection dress
It sets, blasting flyrock protective device includes flyrock protection stratum reticulare, protective facing, load-bearing skeleton, screen layer, and protective facing is set to winged
The inclination angle of stone protection stratum reticulare rear portion, protective facing and horizontal plane is 81 degree and is obliquely installed towards blast area side, protection face
Layer side is mutually fixedly connected with load-bearing skeleton, and screen layer is fixed on load-bearing skeleton side.
3. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 2, it is characterised in that:
The flyrock protection stratum reticulare is the annular passive protection net of aperture 300mm, and flyrock protection stratum reticulare upper and lower part is respectively and fixedly provided with winged
Stone protective net anchor pole.
4. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 2, it is characterised in that:
The protective facing includes protection reinforcing bar stratum reticulare, diamond shape passive protection net, protects steel mesh layer choosing with 16 200*200mm's of Φ
Steel mesh.
5. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 1, it is characterised in that:
The load-bearing skeleton is made of I20 I-steel and 10# channel steel, is distributed in groined type.
6. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 5, it is characterised in that:
It is the sieve of 8mm that the screen layer, which selects bore dia, for stopping partial size to be greater than the slungshot of 65mm~8mm.
7. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 5, it is characterised in that:
The load-bearing skeleton end is fixed with skeleton anchor pole, and skeleton anchor pole is fixed on underground chamber palisades, and skeleton bolt diameter is
28mm。
8. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 5, it is characterised in that:
The load-bearing skeleton is fixedly connected with girder truss, and girder truss is fixedly connected by wirerope with vault anchoring pile, vault anchoring pile and steel
Cord takes up reinforcing at the girder truss back side, and vault anchoring pile diameter is 28mm.
9. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 8, it is characterised in that:
The blasting impact protective device includes iron sheet watt layer, support frame, rock wool layer, steel grid, and iron sheet watt layer is disposed in proximity to
The one side of blast area, iron sheet watt layer are fixed on support frame, and iron sheet watt layer choosing is mutually fixedly connected with 8# galvanized wire with support frame,
Rock wool layer laying is fixed on support frame side, steel grid is fixedly connected with rock wool layer reverse side, steel grid be used for pair
Rock wool layer protection and fixed, steel grid size selection 16@400*400mm of Φ, steel grid end and support frame welding are solid
Fixed, for protecting and fixing rock wool layer, iron sheet watt layer is formed by monolithic iron sheet watt overlap joint, and monolithic iron sheet watt height is 70-90cm,
Clinch is provided between monolithic iron sheet watt, clinch length is 10cm.
10. underground space erosion control noise reduction dust-separation shotfiring safety compound protection method according to claim 9, feature exist
In: the support frame is made of I20 I-steel and 10# channel steel, is distributed in groined type, support frame end is fixed with support rib
Frame dowel, support frame dowel are fixed on underground chamber palisades, and support frame dowel diameter is 28mm, and rock wool layer selects 90mm
Thick rock wool.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910564269.5A CN110230963B (en) | 2019-06-27 | 2019-06-27 | Underground engineering anti-impact noise-reduction dust-isolation blasting safety composite protection method |
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| CN201910564269.5A CN110230963B (en) | 2019-06-27 | 2019-06-27 | Underground engineering anti-impact noise-reduction dust-isolation blasting safety composite protection method |
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| CN110230963B CN110230963B (en) | 2024-02-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110230963B (en) | 2024-02-13 |
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