CN107327310A - A kind of method of ventilation of high-speed railway gas tunnel - Google Patents
A kind of method of ventilation of high-speed railway gas tunnel Download PDFInfo
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- CN107327310A CN107327310A CN201710572657.9A CN201710572657A CN107327310A CN 107327310 A CN107327310 A CN 107327310A CN 201710572657 A CN201710572657 A CN 201710572657A CN 107327310 A CN107327310 A CN 107327310A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000013022 venting Methods 0.000 claims abstract description 5
- 238000009415 formwork Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 63
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Classifications
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- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Ventilation (AREA)
Abstract
Embodiments of the invention disclose a kind of method of ventilation of high-speed railway gas tunnel, are related to tunnel ventilation technology, being capable of lifting construction security, reduction constructing tunnel cost.The method of ventilation of the high-speed railway gas tunnel includes：The horizontal hole for being arranged on tunnel entrance and pre-setting uses forced ventilation mode；The first ventilation equipment of the first power threshold are laid in tunnel portal；The second ventilation equipment of the second power threshold are laid in horizontal hole with main tunnel intersection in Tunnel, after main hole is entered, more than the third venting equipment that the 3rd power threshold is laid after the distance threshold pre-set, first power threshold is more than second power threshold, and second power threshold is more than the 3rd power threshold.The present invention is applied to the ventilation of high-speed railway gas tunnel.
Description
Technical field
The present invention relates to tunnel ventilation technology, more particularly to a kind of method of ventilation of high-speed railway gas tunnel.
Background technology
In recent years, continuing to develop with technology, the Tunnel Engineering construction project such as high-speed railway is more and more, due to applying
Coal seam, goaf etc. are inevitably run into work and contains coalbed gas geology, thus, the safe construction of gas tunnel turns into high-speed railway
That constructs pays close attention to problem.At present, gas tunnel construction is general uses forced ventilation dilution method so that the gas in tunnel
Concentration is reduced to below non-explosion ratio and below harmful concentration, and methane gas progressively can be squeezed into discharge tunnel
Outside.
For longer railway tunnel, the often shorter but current high-speed railway gas tunnel of the paragraph with gas risk
The method of ventilation in road, in order to ensure construction safety, configures ventilation equipment in whole Railway Tunnel, and according to gas tunnel
Standard carries out reinforcing formula ventilation.So, gas exposure amount is small, concentration is low, in the case of duration length, if in whole tunnel
Configuration ventilation equipment in road, and intensified ventilation mode is used for a long time, cause ventilation cost height, event easily occur in ventilation equipment
Barrier.On the other hand, if the understanding to gas in gas tunnel construction is not deep, ventilation equipment configuration is improper, easily causes again
The generation of gas explosion accident, jeopardizes operating personnel's life security, causes the heavy losses of property so that the construction peace of gas tunnel
Full property is relatively low.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of method of ventilation of high-speed railway gas tunnel, being capable of lifting construction
Security, reduces constructing tunnel cost.
In a first aspect, the embodiment of the present invention provides a kind of method of ventilation of high-speed railway gas tunnel, including：
The horizontal hole for being arranged on tunnel entrance and pre-setting uses forced ventilation mode；
The first ventilation equipment of the first power threshold are laid in tunnel portal；
The second ventilation equipment of the second power threshold are laid in horizontal hole with main tunnel intersection in Tunnel, are entering main hole
Afterwards, more than the third venting equipment that the 3rd power threshold is laid after the distance threshold pre-set, first power threshold is big
In second power threshold, second power threshold is more than the 3rd power threshold.
With reference in a first aspect, in the first embodiment of first aspect, methods described also includes：
In tunnel, corner is laid the dirty distinguished and admirable axial flow blower for leading to eminence discharge outside hole.
It is described in tunnel in second of embodiment of first aspect with reference to the first embodiment of first aspect
Corner, which is laid, includes the dirty distinguished and admirable axial flow blower for leading to eminence discharge outside hole：
2 110kW axial flow blowers are installed at each hole, wherein 1 operation, 1 standby, has resistance by Φ 1.5m
Fresh air is delivered to face by combustion, anlistatig dual anti-airduct；
Ventilation blower is set at the 30m of hole external distance hole, airduct is foremost away from face 5m, and preceding 55m uses foldable wind
Pipe.
With reference in a first aspect, in the third embodiment of first aspect, methods described also includes：
Increase the special paragraph comprising the chamber that collapses, formwork jumbo, widened section, refuge chamber portable blower or high-pressure blast is set, for
No special paragraph uses jet blower to roll up suction pressure to improve wind speed.
With reference to the third embodiment of first aspect, in the 4th kind of embodiment of first aspect, described pair includes
Collapse chamber, formwork jumbo, widened section, refuge chamber special paragraph increase portable blower or set high-pressure blast include：
Portable portable blower is set in the location of face to formwork jumbo, and the portable portable blower is by the way that axial flow blower is pacified
Formed on flat car, the portable portable blower coordinates pneumatic hose air feed；
Gas is drawn with high-pressure blast at the dead angle of face to formwork jumbo location, chamber position of collapsing；
5.5kW portable blowers one are set at the urgent refuge chamber in each tunnel.
With reference in a first aspect, in the 5th kind of embodiment of first aspect, methods described also includes：
Blown out in distance in the range of a little the first distance threshold, if detect it is distinguished and admirable in gas density reach and pre-set
The concentration threshold of gas first, forbid blowing out.
With reference in a first aspect, in the 6th kind of embodiment of first aspect, methods described also includes：
Excavate it is distinguished and admirable neutralization range motor and its switch second distance threshold range in, if detect it is distinguished and admirable in
Gas density reaches the concentration threshold of gas second pre-set, is stopped and motor operating, withdraws from personnel, cut off the electricity supply.
With reference in a first aspect, in the 7th kind of embodiment of first aspect, methods described also includes：
Ventilation to high-speed railway gas tunnel is aerated management.
With reference to first aspect, first aspect the first to any embodiment in the 7th kind, the of first aspect
In eight kinds of embodiments, acquisition first power threshold includes：
Calculate tunnel ventilation amount；
Calculate forced effective length air requirement；
Calculate wind speed needed for fans entrance；
Wind speed needed for the tunnel ventilation amount, forced effective length air requirement and fans entrance is applied to advance
The power of fan calculation formula of setting, obtains first power threshold.
With reference to the 8th kind of embodiment of first aspect, in the 9th kind of embodiment of first aspect, the calculating tunnel
The formula of road ventilation is as follows：
In formula,
Q is tunnel ventilation amount；
QCH4For the tentative calculation gas definitely amount of gushing；
BgAllow gas density for working face；
BgoFor gas density of the feeding in distinguished and admirable；
K is Gas nonuniformity coefficient.
A kind of method of ventilation of high-speed railway gas tunnel provided in an embodiment of the present invention, by be arranged on tunnel entrance and
The horizontal hole pre-set uses forced ventilation mode；The first ventilation equipment of the first power threshold are laid in tunnel portal；
The second ventilation equipment of the second power threshold are laid in horizontal hole with main tunnel intersection in Tunnel, after main hole is entered, more than advance
The third venting equipment of the 3rd power threshold is laid after the distance threshold of setting, first power threshold is more than second work(
Rate threshold value, second power threshold be more than the 3rd power threshold, can lifting construction security, reduction constructing tunnel into
This.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the method for ventilation schematic flow sheet of the high-speed railway gas tunnel of embodiments of the invention one；
Fig. 2 is the method for ventilation schematic flow sheet of the high-speed railway gas tunnel of embodiments of the invention two；
Fig. 3 is the Y structure schematic diagram of embodiments of the invention three；
Embodiment
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
Its embodiment, belongs to the scope of protection of the invention.
Fig. 1 is the method for ventilation schematic flow sheet of the high-speed railway gas tunnel of embodiments of the invention one, as shown in figure 1,
The method of the present embodiment can include：
Step 101, the horizontal hole for being arranged on tunnel entrance and pre-setting uses forced ventilation mode；
In the present embodiment, as an alternative embodiment, the horizontal hole pre-set is the horizontal holes of 1#.
Fig. 2 is the entrance working section forced ventilation horizontal layout schematic diagram of embodiments of the invention two.
Fig. 3 is the 1# Heng Dong work area forced ventilation horizontal layout schematic diagrames of embodiments of the invention three.
Step 102, the first ventilation equipment of the first power threshold are laid in tunnel portal；
In the present embodiment, as an alternative embodiment, the main air blower of the first ventilation equipment uses SDF (B) -6-No18, work(
Rate 389KW, is arranged in tunnel portal.
Step 103, the second ventilation equipment of the second power threshold are laid in horizontal hole with main tunnel intersection in Tunnel, are being entered
Become owner of behind hole, more than the third venting equipment that the 3rd power threshold is laid after the distance threshold pre-set, first power
Threshold value is more than second power threshold, and second power threshold is more than the 3rd power threshold.
In the present embodiment, as an alternative embodiment, the main air blower of the second ventilation equipment uses SDF (B) -6-No16 types
(explosion-proof type, every power 206KW) carries out relay, and distance threshold is set to 100m, after main hole enters, more than 100 meters, is further added by
One SDF (B) -4-No11 type (explosion-proof type, every power 107KW).
In the present embodiment, the blower fan model parameter such as table 1 of use.
Table 1
In the present embodiment, an alternative embodiment, the acceptable concentration standard of the power foundation pernicious gas of ventilation equipment are used as
And parameters for tunnel is determined, wherein, parameters for tunnel includes：Tunnel ventilation amount, forced effective length air requirement and blower fan
Wind speed needed for entrance.
The acceptable concentration standard of pernicious gas such as table 2
Table 2
| Gas title | Safe level standard (ppm) | Remarks |
| CO | 24(30mg/m3) | |
| CO2 | Based on volume of air, 0.5% cannot be greater than | |
| NOx | 10(5mg/m3) | |
| H2S | 10 |
In the present embodiment, as an alternative embodiment, obtaining first power threshold includes：
A11, calculates tunnel ventilation amount；
In the present embodiment, as an alternative embodiment, tunnel ventilation amount can be calculated according to tunnel gas outburst amount, specifically
Formula is as follows：
In formula,
Q is tunnel ventilation amount；
QCH4For the tentative calculation gas definitely amount of gushing, an alternative embodiment, Q are used asCH4=0.05：0.42m3/min。
BgAllow gas density for working face, be used as an alternative embodiment, Bg=0.5%.
BgoFor gas density of the feeding in distinguished and admirable, an alternative embodiment, B are used asgo=0.
K is Gas nonuniformity coefficient, is used as an alternative embodiment, K=1.5.
In the present embodiment, Q is takenCH4=0.42m3/ min, then calculating obtained tunnel ventilation amount is：
In the present embodiment, as another alternative embodiment, tunnel ventilation amount, tool can also be calculated according to minimum windspeed in hole
Body formula is as follows：
Q=Vmin*S
In formula,
Q is tunnel ventilation amount；
VminFor ramus volaris profundus face cross-sectional area；
S is airflow velocity.
In the present embodiment, an alternative embodiment, V are used asmin=160m2, S=0.5*60m/min then calculates obtained tunnel
Road ventilation is：
Q=160*0.5*60=480m3/min
In the present embodiment, as yet another alternative embodiment, first obtained can also be calculated according to tunnel gas outburst amount
Tunnel ventilation amount and the greater in obtained the second tunnel ventilation amount is calculated as tunnel ventilation according to minimum windspeed in hole
Amount, specific formula is as follows：
In the present embodiment, using as above parameter, then the tunnel ventilation amount finally determined is 480m3/min。
A12, calculates forced effective length air requirement；
In the present embodiment, as an alternative embodiment, forced effective length air requirement is calculated using following formula：
In formula,
QmFor forced effective length air requirement；
Q0It need to ensure air quantity for ramus volaris profundus face；
L is to enter insertion maximum distance from the horizontal hole pre-set.
In the present embodiment, ramus volaris profundus face need to ensure that air quantity takes Q0=4800m3/ min, the horizontal hole pre-set is the horizontal holes of 1#, from
It is 3795 meters that the horizontal holes of 1#, which enter insertion maximum distance, and ramus volaris profundus face need to ensure that air quantity is 480m3/ min, then calculate obtained press-in
Formula effective length air requirement is：
A13, calculates wind speed needed for fans entrance；
In the present embodiment, as an alternative embodiment, wind speed needed for calculating fans entrance using following formula：
In formula,
VoThe wind speed for needed for fans entrance；
A is air duct sectional area.
In the present embodiment, as an alternative embodiment, using a diameter of 1.5m air duct,Qm
=8813.80m3/ min, then wind speed needed for calculating obtained fans entrance is：
A14, wind speed needed for the tunnel ventilation amount, forced effective length air requirement and fans entrance is applied to
The power of fan calculation formula pre-set, obtains first power threshold.
In the present embodiment, as an alternative embodiment, power of fan is calculated using following formula：
In formula,
P is power of fan；
ρ is atmospheric density.
In the present embodiment, ρ=1.2Kg/m is taken3, other parameters as above, then calculate obtained power of fan and are：
The ÷ 1000=609.5KW of P=0.5*1.2*83.16*83.16*8813.8 ÷ 60
In the present embodiment, other power thresholds can be calculated according to above formula, the difference is that design parameter value therein.
In the present embodiment, as an alternative embodiment, this method also includes：
In tunnel, corner is laid the dirty distinguished and admirable axial flow blower for leading to eminence discharge outside hole.
In the present embodiment, as an alternative embodiment, outer air exhauster is increased in corner, distinguished and admirable is led to dirty outside hole
Eminence is discharged, so as to ensure that air accelerates circulation in tunnel, it is to avoid with fresh distinguished and admirable entrance hole.
In the present embodiment, as an alternative embodiment, in tunnel, corner, which is laid, arranges the distinguished and admirable eminence that leads to outside hole of dirt
The axial flow blower put includes：
2 110kW axial flow blowers are installed at each hole, wherein 1 operation, 1 standby, has resistance by Φ 1.5m
Fresh air is delivered to face by combustion, anlistatig dual anti-airduct；
Ventilation blower is set at the 30m of hole external distance hole, airduct is foremost away from face 5m, and preceding 55m uses foldable wind
Pipe.So, when blowing out, the foldable airduct of the 55m can be rapidly reduced to beyond blasting fume throwing area.
In the present embodiment, as another alternative embodiment, this method also includes：
Increase the special paragraph comprising the chamber that collapses, formwork jumbo, widened section, refuge chamber portable blower or high-pressure blast is set, for
No special paragraph uses jet blower to roll up suction pressure to improve wind speed.
In the present embodiment, as an alternative embodiment, tunnel return air wind speed is designed by 0.5m/s, to prevent methane accumulation,
The chamber that collapses, formwork jumbo, widened section, refuge chamber etc. increase portable blower are solved, rolled up for general paragraph using jet blower
Suction pressure is to improve wind speed, so as to solve the laminar flow problem of return gas.
In the present embodiment, as yet another alternative embodiment, to comprising the chamber that collapses, formwork jumbo, widened section, refuge chamber it is special
Paragraph increases portable blower or sets high-pressure blast to include：
Portable portable blower is set in the location of face to formwork jumbo, and the portable portable blower is by the way that axial flow blower is pacified
Formed on flat car, the portable portable blower coordinates pneumatic hose air feed, to increase the wind speed that gas easily assembles location, prevents
Gas accumulation；
Gas is drawn with high-pressure blast at the dead angle of face to formwork jumbo location, chamber position of collapsing.Concrete scheme is root
High-pressure blast is blown into it according to gas management result, the gas blowout assembled is allowed to discharge after mixing with return air.
5.5kW portable blowers one are set at the urgent refuge chamber in each tunnel, to dispel the gas assembled at this.
In the present embodiment, as yet another alternative embodiment, this method also includes：
Blown out in distance in the range of a little the first distance threshold, if detect it is distinguished and admirable in gas density reach and pre-set
The concentration threshold of gas first, forbid blowing out.
In the present embodiment, the first distance threshold be 20m, the concentration threshold of gas first be 1%, if blow out place 20m with
It is interior it is distinguished and admirable in gas density when reaching 1%, forbid to blow out.
In the present embodiment, as yet another alternative embodiment, this method also includes：
Excavate it is distinguished and admirable neutralization range motor and its switch second distance threshold range in, if detect it is distinguished and admirable in
Gas density reaches the concentration threshold of gas second pre-set, is stopped and motor operating, withdraws from personnel, cut off the electricity supply.
In the present embodiment, second distance threshold value is 20m, and the concentration threshold of gas second is 1.5%, if excavating distinguished and admirable neutralize
When distinguished and admirable middle gas density reaches 1.5% within 20m near motor and its switch, it is necessary to be stopped and motor operating, remove
Go out personnel, cut off the electricity supply, handled.
In the present embodiment, as yet another alternative embodiment, this method also includes：
Ventilation to high-speed railway gas tunnel is aerated management.
In the present embodiment, as an alternative embodiment, being aerated management to the ventilation of high-speed railway gas tunnel includes：
B11, set up special messenger ventilation install, using, maintenance, safeguard ventilation teams and groups, inspection is carried out daily, it is ensured that pipeline
Straight, no dog leg, leak, start personnel carry out record registration by teams and groups to fan operation daily；
B12, after ventilating system is installed, is carried out an acceptance inspection by establishment officer of project management department to ventilation equipment first, confirms ventilation effect
Whether fruit is consistent with design, secondly, and establishment officer of project management department inspects periodically weekly to ventilation；
B13, jewel hole, spray anchor, muck removal transport, installation grid steel frame, face landslide, sump remedy, gas density are more than
Or during equal to 0.5%, set blower fan to run at high speed, strengthening detection ensures that any place's gas density is down to less than 0.5% in hole
It could construct；
B14, the stoppage in transit of blower fan, Guan Kai, speed change are responsible for dispatch control by Surveillance center special messenger, and carry out corresponding record
And sign recognize it is rear for future reference；All other men are inaccurate to shut down without authorization, and when moving die plate chassis, blower fan takes low-grade location air feed, to protect
The continuity of testimony wind.
B15, ventilation equipment is installed after normal operation, every 10 days carry out 1 time comprehensively survey wind, to face and other use wind
Place, surveys wind at any time according to actual needs, and wind result is surveyed every time and makes a record and writes on the registration plate in survey wind place；If wind speed
Code requirement can not be met, using adequate measures, air quantity regulation is carried out., can be with as an alternative embodiment in the present embodiment
Air velocity transducer is set to monitor wind speed, face and return air place set firedamp sensor respectively in tunnel, in ventilation equipment
Middle setting blower fan on-off transducer.
B16, surveys primary air velocity and blast, and calculates air leak rate of air curtain, it is ensured that deliver to area for every 7 days in airduct air intake, air outlet
The air quantity in face is consistent with design；Such as air leak rate of air curtain is more than 1%, and reason is searched in analysis, is corrected as early as possible.
B17, tunnel ventilation carries out construction, management management system.It must file an application, report step by step, according to the blowing-out time
Length can be implemented after unit in charge of construction and supervisor's examination ＆ approval.Specifically include：
(1) blowing-out after shelf team leader report work area chief engineer approves after examination, then reported deputy director's examination ＆ verification batch within 30 minutes
Can blowing-out after standard.
(2) the blowing-out time exceedes 30min, after shelf Dui Bao project management department chief engineers approve after examination, then reports chief inspector's approval real
Apply.
(3) it must assure that all personnel has withdrawn in hole before blowing-out, and cut off the electricity supply；Recover before ventilation, it is necessary to detect
Gas density, through on duty watt of inspection work detection, distinguished and admirable middle gas density does not surpass within 10m near booster and its switch
Booster can be opened by designated person when 0.5%, gas density in hole is monitored by firedamp sensor, works as gas density
Higher than 0.5% alarm.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
Each embodiment in this specification is described by the way of related, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.
For device embodiment, because it is substantially similar to embodiment of the method, so the comparison of description is simple
Single, the relevent part can refer to the partial explaination of embodiments of method.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of method of ventilation of high-speed railway gas tunnel, it is characterised in that including：
The horizontal hole for being arranged on tunnel entrance and pre-setting uses forced ventilation mode；
The first ventilation equipment of the first power threshold are laid in tunnel portal；
The second ventilation equipment of the second power threshold are laid in horizontal hole with main tunnel intersection in Tunnel, after main hole is entered, and are surpassed
Cross after the distance threshold pre-set and lay the third venting equipment of the 3rd power threshold, first power threshold is more than described
Second power threshold, second power threshold is more than the 3rd power threshold.
2. the method for ventilation of high-speed railway gas tunnel according to claim 1, it is characterised in that methods described is also wrapped
Include：
In tunnel, corner is laid the dirty distinguished and admirable axial flow blower for leading to eminence discharge outside hole.
3. the method for ventilation of high-speed railway gas tunnel according to claim 2, it is characterised in that described in tunnel bend
Place, which is laid, includes the dirty distinguished and admirable axial flow blower for leading to eminence discharge outside hole：
2 110kW axial flow blowers are installed at each hole, wherein 1 operation, 1 standby, has by Φ 1.5m fire-retardant, anti-
Fresh air is delivered to face by the dual anti-airduct of electrostatic；
Ventilation blower is set at the 30m of hole external distance hole, airduct is foremost away from face 5m, and preceding 55m uses foldable airduct.
4. the method for ventilation of high-speed railway gas tunnel according to claim 1, it is characterised in that methods described is also wrapped
Include：
To special paragraph increase portable blower or setting high-pressure blast comprising the chamber that collapses, formwork jumbo, widened section, refuge chamber, for non-spy
Different paragraph uses jet blower to roll up suction pressure to improve wind speed.
5. the method for ventilation of high-speed railway gas tunnel according to claim 4, it is characterised in that described pair comprising collapsing
Chamber, formwork jumbo, widened section, the special paragraph increase portable blower of refuge chamber set high-pressure blast to include：
Portable portable blower is set in the location of face to formwork jumbo, and the portable portable blower is by the way that axial flow blower is arranged on
Formed on flat car, the portable portable blower coordinates pneumatic hose air feed；
Gas is drawn with high-pressure blast at the dead angle of face to formwork jumbo location, chamber position of collapsing；
5.5kW portable blowers one are set at the urgent refuge chamber in each tunnel.
6. the method for ventilation of high-speed railway gas tunnel according to claim 1, it is characterised in that methods described is also wrapped
Include：
Blown out in distance in the range of a little the first distance threshold, if detect it is distinguished and admirable in gas density reach watt pre-set
This first concentration threshold, forbids blowing out.
7. the method for ventilation of high-speed railway gas tunnel according to claim 1, it is characterised in that methods described is also wrapped
Include：
Excavate it is distinguished and admirable neutralization range motor and its switch second distance threshold range in, if detect it is distinguished and admirable in gas
Concentration reaches the concentration threshold of gas second pre-set, is stopped and motor operating, withdraws from personnel, cut off the electricity supply.
8. the method for ventilation of high-speed railway gas tunnel according to claim 1, it is characterised in that methods described is also wrapped
Include：
Ventilation to high-speed railway gas tunnel is aerated management.
9. the method for ventilation of the high-speed railway gas tunnel according to any one of claim 1 to 8, it is characterised in that described
Obtaining first power threshold includes：
Calculate tunnel ventilation amount；
Calculate forced effective length air requirement；
Calculate wind speed needed for fans entrance；
Wind speed needed for the tunnel ventilation amount, forced effective length air requirement and fans entrance is applied to pre-set
Power of fan calculation formula, obtain first power threshold.
10. the method for ventilation of high-speed railway gas tunnel according to claim 9, it is characterised in that the calculating tunnel
The formula of ventilation is as follows：
<mrow>
<mi>Q</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>Q</mi>
<mrow>
<mi>C</mi>
<mi>H</mi>
<mn>4</mn>
</mrow>
</msub>
<mrow>
<msub>
<mi>B</mi>
<mi>g</mi>
</msub>
<mo>-</mo>
<msub>
<mi>B</mi>
<mrow>
<mi>g</mi>
<mi>o</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>*</mo>
<mi>K</mi>
</mrow>
In formula,
Q is tunnel ventilation amount；
QCH4For the tentative calculation gas definitely amount of gushing；
BgAllow gas density for working face；
BgoFor gas density of the feeding in distinguished and admirable；
K is Gas nonuniformity coefficient.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593951A (en) * | 2019-10-18 | 2019-12-20 | 国网山西省电力公司运城供电公司 | Low-voltage power supply method for tunnel power grid engineering construction |
| CN111219203A (en) * | 2020-03-19 | 2020-06-02 | 中铁二院工程集团有限责任公司 | Gas discharge system of supplementary gallery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350996A (en) * | 2015-10-26 | 2016-02-24 | 中铁二十局集团有限公司 | Plateau long tunnel multi-dead end ventilation construction method |
| CN106593508A (en) * | 2016-12-26 | 2017-04-26 | 中铁二局集团有限公司 | Plateau high-gas extra long separating type tunnel construction ventilation method |
| CN206233947U (en) * | 2016-12-10 | 2017-06-09 | 中铁二十局集团第五工程有限公司 | Major long tunnel construction ventilating and purifying air system |
| CN106930781A (en) * | 2017-03-29 | 2017-07-07 | 中铁十七局集团第三工程有限公司 | A kind of gas tunnel method of ventilation and its structure |
-
2017
- 2017-07-13 CN CN201710572657.9A patent/CN107327310A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350996A (en) * | 2015-10-26 | 2016-02-24 | 中铁二十局集团有限公司 | Plateau long tunnel multi-dead end ventilation construction method |
| CN206233947U (en) * | 2016-12-10 | 2017-06-09 | 中铁二十局集团第五工程有限公司 | Major long tunnel construction ventilating and purifying air system |
| CN106593508A (en) * | 2016-12-26 | 2017-04-26 | 中铁二局集团有限公司 | Plateau high-gas extra long separating type tunnel construction ventilation method |
| CN106930781A (en) * | 2017-03-29 | 2017-07-07 | 中铁十七局集团第三工程有限公司 | A kind of gas tunnel method of ventilation and its structure |
Non-Patent Citations (1)
| Title |
|---|
| 刘建正: "紫坪铺隧道通风系统施工技术", 《中国新技术新产品》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593951A (en) * | 2019-10-18 | 2019-12-20 | 国网山西省电力公司运城供电公司 | Low-voltage power supply method for tunnel power grid engineering construction |
| CN111219203A (en) * | 2020-03-19 | 2020-06-02 | 中铁二院工程集团有限责任公司 | Gas discharge system of supplementary gallery |
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