CN103696806A - Gas tunnel control method and system thereof - Google Patents
Gas tunnel control method and system thereof Download PDFInfo
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- CN103696806A CN103696806A CN201310701603.XA CN201310701603A CN103696806A CN 103696806 A CN103696806 A CN 103696806A CN 201310701603 A CN201310701603 A CN 201310701603A CN 103696806 A CN103696806 A CN 103696806A
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Abstract
The invention discloses a gas tunnel control method and a system thereof and belongs to the field of tunnel construction. The control method comprises a first step of advance geological forecast, a second step of construction ventilation and a third step of gas detection. A gas monitoring system comprises gas sensors, a fan starting and shutdown sensor and a warning device, wherein the gas sensors are respectively arranged on an inner tunnel face of a tunnel, a secondary lining trolley and a return air place; and the fan starting and shutdown sensor is arranged on a fan. The fan starting and shutdown sensor monitors stop signals of the fan and is connected with a tunnel power supply line to control disconnection and connection of the tunnel power supply line, the gas sensors monitor the concentration of gas in the tunnel, are respectively connected with the tunnel power supply line to control disconnection and connection of the tunnel power supply line and are electrically connected with the warning device to control the warning device to be on and off. The gas tunnel control method and the system are targeted, comprehensive and strict and aims to deal with specific conditions of the gas tunnel.
Description
Technical field
The invention belongs to constructing tunnel field.
Background technology
Gas tunnel construction technology, it is general that due to not dark to the understanding of gas, technology misapplication, easily causes the generation of gas explosion accident, jeopardizes operating personnel's life security, and the heavy losses of property cause bad social influence.Therefore, in the urgent need to propose a kind of targetedly, comprehensive and tight gas tunnel Prevention Technique scheme.
Summary of the invention
The object of the invention is to: propose a kind of for gas tunnel particular case targetedly, comprehensive and tight gas tunnel prevents and treats method and system thereof.
The object of the invention realizes by following technical proposals:
Gas tunnel is prevented and treated a method, comprises following measures:
1) advance geologic prediction:
A, probing: while often creeping into 2m, detect gas density in once boring, while finding that there is Gas, encryption detection;
B, advance borehole: in 3 advance boreholes of the every circulation construction of the excavation face of appearing on the stage, the degree of depth 60～100m, every circulation lap length is no less than 5m;
C, guide hole: in second section of topping bar, arrange that some guide holes survey, guide hole is than blowing out more than the dark 2m of borehole of use;
2) construction ventilation:
A, ventilation by ducts: high gas location adopts ventilation by ducts, adopts blower fan to pass into fresh air to forced air blast in positive hole, tunnel outside hole, adopt jet blower drainage to discharge dirty wind through transverse passage-way by flat leading;
B, duct type ventilation: present low gas location adopts duct type to ventilate, adopt pipeline, through transverse passage-way, the dirty wind of negative pressure sucking-off is passed through in positive hole, tunnel flat leading;
3) gas detects:
At main return airway, air velocity transducer monitoring wind speed is set, in tunnel, face, two lining chassis and return air place arrange respectively firedamp sensor, at blower fan, blower fan start-stop sensor is set, the start-stop state of described blower fan start-stop Sensor monitoring blower fan, when blower fan being detected and shut down, automatically control power-off in hole, when blower fan recovery running being detected, automatically control telegram in reply in hole; Gas density in described firedamp sensor monitoring hole, when gas density is higher than 0.5% alarm, when gas density higher than 0.8% time control cavity preparation in power-off, when gas density is sent a telegram in reply in lower than 0.3% time control cavity preparation.
As selection, described 3 advance boreholes, wherein two holes are positioned at the excavation face bottom of appearing on the stage, and another hole is positioned at the excavation face central part of appearing on the stage, boring aperture 75mm, 5～10 °, the advance borehole elevation angle.
As selection, described high gas location is tunnel entrance and 1, position, 2# inclined shaft boundary.
As selection, described present low gas location is tunnel exit and position, 3# inclined shaft boundary.
As selection, the described firedamp sensor of being located at tunnel is hung the top in tunnel, distance arch distance 20～30cm, described air velocity transducer hanging is in the centre in tunnel, described blower fan start-stop sensor is installed on blower fan electricity cable, the firedamp sensor of being located at face must not surpass 5m apart from face, is located at the firedamp sensor distance two lining chassis forward position 0～5m of two lining chassis, is located at the sensor distance return air inlet 10～20m in return air place.
As selection, also comprise CO sensor, described CO sensor hanging is at the top in tunnel.
For aforementioned gas tunnel, prevent and treat the gas monitoring system of method, comprise the firedamp sensor of being located at respectively face in tunnel, two lining chassis and return air place, be located at the blower fan start-stop sensor of blower fan, and warning device, the stop signal Bing Yu tunnel supply line of described blower fan start-stop Sensor monitoring blower fan connects its power-off of control and telegram in reply, gas density in described firedamp sensor monitoring hole is also connected respectively its power-off of control and telegram in reply with tunnel supply line, be electrically connected to control its start and stop with warning device.
As selection, described blower fan start-stop sensor is the equipment on/off transducer of being located on blower fan electricity cable, and its magnetic switch of automatically controlling outside hole by feed circuit breaker is realized power-off in hole.
As selection, the magnetic switch that firedamp sensor is controlled outside hole automatically by feed circuit breaker is realized power-off in hole.
The main scheme of aforementioned the present invention and each further selection scheme thereof can independent assortment to form a plurality of schemes; be the present invention and can adopt also claimed scheme: as the present invention; each selects to select any combination with other; those skilled in the art can understand there is multiple combination according to prior art and common practise after understanding the present invention program, at this, do not do exhaustive.
Beneficial effect of the present invention: the invention solves gas tunnel construction technology, had high input in the past, weak effect, is difficult to guarantee gas tunnel construction safety technical barrier, adopts this gas tunnel construction technology used device few, and cost is low, instant effect, and safety guarantee is strong.
Accompanying drawing explanation
Fig. 1 is that elevational schematic view is arranged in the advance borehole of the embodiment of the present invention;
Fig. 2 is the advance borehole plane of arrangement schematic diagram of the embodiment of the present invention;
Fig. 3 is the Measuring System of Gas FB(flow block) of the embodiment of the present invention.
The specific embodiment
As shown in Figures 1 to 3, following non-limiting examples is used for illustrating the present invention.
1, advance geologic prediction:
During probing, mainly detect boring and whether have Gas: while generally often creeping into 2m, detect gas density in once boring, while finding that there is Gas, encryption detection, to more accurately determine the position of Gas point.
Can there is not coal and Gas Outburst in natural gas tunnel, according to tunnel requirement of explosion proof, use mining all-hydraulic explosion-proof rig, carry out advance geologic prediction, (wherein two holes are positioned at the excavation face bottom of appearing on the stage to 3 advance boreholes of every circulation construction, and another hole is positioned at the excavation face central part of appearing on the stage, see Fig. 1), length 60～100m, every circulation lap length is no less than 5m, boring aperture 75mm.5～10 °, the advance borehole elevation angle so that deslagging, is carried out in accordance with regulations gas detection in boring by watt inspection person in boring procedure, and geomatics engineer is carried out realistic in drilling process, and carries out detailed record.
Utilize guide hole to survey: guide hole is than blowing out more than the dark 2m of borehole of use simultaneously, when setting off firecrackers along belt construction, guide hole is effectively supplementing of Advance Drilling, guide hole is generally arranged in second section of topping bar, guide hole quantity can determine flexibly according to on-site actual situations, watt inspection person detects gas density in borehole and guide hole in time, also can detect single hole gas emission if desired.
2, construction ventilation:
Draft type: ventilation is the Main Means of smoke evacuation dedusting and dilution gas, gas tunnel uninterruptedly ventilation of construction period, for high gas location, adopt ventilation by ducts, at tunnel entrance and 1,2# inclined shaft position, outside hole, adopt blower fan to pass into fresh air to forced air blast in positive hole, tunnel, through transverse passage-way, by flat leading, adopt jet blower drainage to discharge dirty wind; Present low gas location adopts duct type to ventilate, and at tunnel exit and 3# inclined shaft position, flat leading, adopts pipeline, through transverse passage-way, two kinds of draft types of the dirty wind of negative pressure sucking-off are passed through in positive hole, tunnel.
It is 30m that blower fan is installed apart from hole, adopts the two blower fans of same model, and wherein a blower fan, as standby, adopts two-way Power supply simultaneously, guarantees in the situation of Yi road power cut-off, and the second road power supply can be at 15 minutes with interior power supply, for hole inner blower and illumination.Blower fan adopts explosion-proof type blower fan, and carries out " three special two lockings ", that is, and and dedicated transformer, private cable, special switch, wind-powered electricity generation, gas electric shutting.After blowing-out, restart for some reason before blower fan, must check gas in tunnel by watt inspection person, and take measures to carry out drawing-off gas according to drawing-off gas pertinent regulations, carry out the management of special teams and groups.
Air duct, must select flame-retardant and anti-static air duct, and air duct requires hanging straight, damaged sticky the benefit or replacing in time of discovery.
3, gas detects:
1 cover methane monitoring system is all installed in each operation area.
Wherein each gas density thresholding is set to: alarm point: 0.5%; Power-off point: 0.8%; Telegram in reply point: 0.3%: gas density in firedamp sensor monitoring hole, when gas density is higher than 0.5% alarm, when gas density higher than 0.8% time control cavity preparation in power-off, when gas density is sent a telegram in reply in lower than 0.3% time control cavity preparation.
Sensor hanging requires: gas lta, easily accumulate in the top in tunnel, thus require firedamp sensor hanging at the top in tunnel, distance arch distance 20～30cm; CO and atmospheric density approach, and generally also hang the top in tunnel; Air velocity transducer hanging in the centre in tunnel to maximum wind velocity detected; Blower fan start-stop sensor is installed on blower fan electricity cable, but will note the waterproofing protection of sensor.Face sensor distance face must not surpass 5m, two lining chassis sensor distance two lining chassis forward position 0～5m, the region of return air place sensor distance return air inlet 10～20m.Sensor may hang in the hook of burying underground in advance, also can on chassis, install bearing for hanging sensor.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. gas tunnel is prevented and treated a method, it is characterized in that comprising following measures:
1) advance geologic prediction:
A, probing: while often creeping into 2m, detect gas density in once boring, while finding that there is Gas, encryption detection;
B, advance borehole: in 3 advance boreholes of the every circulation construction of the excavation face of appearing on the stage, the degree of depth 60～100m, every circulation lap length is no less than 5m;
C, guide hole: in second section of topping bar, arrange that some guide holes survey, guide hole is than blowing out more than the dark 2m of borehole of use;
2) construction ventilation:
A, ventilation by ducts: high gas location adopts ventilation by ducts, adopts blower fan to pass into fresh air to forced air blast in positive hole, tunnel outside hole, adopt jet blower drainage to discharge dirty wind through transverse passage-way by flat leading;
B, duct type ventilation: present low gas location adopts duct type to ventilate, adopt pipeline, through transverse passage-way, the dirty wind of negative pressure sucking-off is passed through in positive hole, tunnel flat leading;
3) gas detects:
At main return airway, air velocity transducer monitoring wind speed is set, in tunnel, face, two lining chassis and return air place arrange respectively firedamp sensor, at blower fan, blower fan start-stop sensor is set, the start-stop state of described blower fan start-stop Sensor monitoring blower fan, when blower fan being detected and shut down, automatically control power-off in hole, when blower fan recovery running being detected, automatically control telegram in reply in hole; Gas density in described firedamp sensor monitoring hole, when gas density is higher than 0.5% alarm, when gas density higher than 0.8% time control cavity preparation in power-off, when gas density is sent a telegram in reply in lower than 0.3% time control cavity preparation.
2. gas tunnel as claimed in claim 1 is prevented and treated method, it is characterized in that: described 3 advance boreholes, and wherein two holes are positioned at the excavation face bottom of appearing on the stage, and another hole is positioned at the excavation face central part of appearing on the stage, boring aperture 75mm, 5～10 °, the advance borehole elevation angle.
3. gas tunnel as claimed in claim 1 is prevented and treated method, it is characterized in that: described high gas location is tunnel entrance and 1, position, 2# inclined shaft boundary.
4. gas tunnel as claimed in claim 1 is prevented and treated method, it is characterized in that: described present low gas location is tunnel exit and position, 3# inclined shaft boundary.
5. gas tunnel as claimed in claim 1 is prevented and treated method, it is characterized in that: described in be located at the firedamp sensor hanging in tunnel at the top in tunnel, distance arch distance 20～30cm, described air velocity transducer hanging is in the centre in tunnel, described blower fan start-stop sensor is installed on blower fan electricity cable, the firedamp sensor of being located at face must not surpass 5m apart from face, be located at the firedamp sensor distance two lining chassis forward position 0～5m of two lining chassis, be located at the sensor distance return air inlet 10～20m in return air place.
6. gas tunnel as claimed in claim 1 is prevented and treated method, it is characterized in that: also comprise CO sensor, described CO sensor hanging is at the top in tunnel.
7. for the gas tunnel described in the arbitrary claim of claim 1 to 6, prevent and treat the gas monitoring system of method, it is characterized in that: comprise and be located at respectively face in tunnel, the firedamp sensor in two lining chassis and return air place, be located at the blower fan start-stop sensor of blower fan, and warning device, the stop signal Bing Yu tunnel supply line of described blower fan start-stop Sensor monitoring blower fan connects its power-off of control and telegram in reply, gas density in described firedamp sensor monitoring hole is also connected respectively its power-off of control and telegram in reply with tunnel supply line, be electrically connected to warning device and control its start and stop.
8. gas monitoring system as claimed in claim 7, is characterized in that: described blower fan start-stop sensor is the equipment on/off transducer of being located on blower fan electricity cable, and its magnetic switch of automatically controlling outside hole by feed circuit breaker is realized power-off in hole.
9. gas monitoring system as claimed in claim 7, is characterized in that: the magnetic switch that firedamp sensor is controlled outside hole automatically by feed circuit breaker is realized power-off in hole.
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| CN201310701603.XA CN103696806B (en) | 2013-12-19 | 2013-12-19 | Gas tunnel prevention and controls and system thereof |
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| CN201310701603.XA CN103696806B (en) | 2013-12-19 | 2013-12-19 | Gas tunnel prevention and controls and system thereof |
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Cited By (12)
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| CN104370048A (en) * | 2014-09-22 | 2015-02-25 | 中国人民解放军后勤工程学院 | Oil-gas-isolation and explosion-proof system used during construction operation in oil cave depot gallery |
| CN106321137A (en) * | 2016-08-29 | 2017-01-11 | 中国神华能源股份有限公司 | Multi-channel ventilation system for fully mechanized coal mining face and ventilation method for withdraw support |
| 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 |
| CN107035403A (en) * | 2016-12-13 | 2017-08-11 | 中铁隧道集团有限公司 | A kind of non-explosion-proof flexible transport method in high methane and Gas Outburst tunnel |
| CN108194094A (en) * | 2017-12-29 | 2018-06-22 | 中铁十九局集团第二工程有限公司 | The construction technology of Tunnel Passing gas stratomere |
| CN108678777A (en) * | 2018-03-29 | 2018-10-19 | 中交路桥北方工程有限公司 | The method for protecting support of Tunnel Crushed Zone section |
| CN108843368A (en) * | 2018-08-21 | 2018-11-20 | 中铁二院工程集团有限责任公司 | A kind of gas integration monitoring tapping equipment for tunnel cavern |
| CN111197498A (en) * | 2020-03-19 | 2020-05-26 | 中国十九冶集团有限公司 | Tunnel gas processing system and method |
| CN112943349A (en) * | 2021-04-15 | 2021-06-11 | 中铁九局集团第七工程有限公司 | Comprehensive management construction method for gas of high-gas tunnel |
| CN113445986A (en) * | 2021-07-15 | 2021-09-28 | 中铁二十三局集团第三工程有限公司 | Electric drill is surveyed to gas intelligence that tunnel construction used |
| CN113565553A (en) * | 2021-07-22 | 2021-10-29 | 中交第二公路工程局有限公司 | Ventilation system and general gas tunnel comprehensive rapid disposal system |
| CN117662227A (en) * | 2023-10-23 | 2024-03-08 | 中铁七局集团第四工程有限公司 | Construction method applied to gas tunnel |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370048A (en) * | 2014-09-22 | 2015-02-25 | 中国人民解放军后勤工程学院 | Oil-gas-isolation and explosion-proof system used during construction operation in oil cave depot gallery |
| CN104370048B (en) * | 2014-09-22 | 2016-04-13 | 中国人民解放军后勤工程学院 | Oil gas isolation in a kind of oil plant cave depot tunnel during construction operation and flame proof system |
| CN106321137A (en) * | 2016-08-29 | 2017-01-11 | 中国神华能源股份有限公司 | Multi-channel ventilation system for fully mechanized coal mining face and ventilation method for withdraw support |
| CN107035403B (en) * | 2016-12-13 | 2019-06-04 | 中铁隧道集团有限公司 | A kind of high methane and the non-explosion-proof flexible transport method in Gas Outburst tunnel |
| CN107035403A (en) * | 2016-12-13 | 2017-08-11 | 中铁隧道集团有限公司 | A kind of non-explosion-proof flexible transport method in high methane and Gas Outburst tunnel |
| 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 |
| CN108194094A (en) * | 2017-12-29 | 2018-06-22 | 中铁十九局集团第二工程有限公司 | The construction technology of Tunnel Passing gas stratomere |
| CN108678777A (en) * | 2018-03-29 | 2018-10-19 | 中交路桥北方工程有限公司 | The method for protecting support of Tunnel Crushed Zone section |
| CN108678777B (en) * | 2018-03-29 | 2020-06-09 | 中交路桥北方工程有限公司 | Support method for tunnel fault fracture zone section |
| CN108843368A (en) * | 2018-08-21 | 2018-11-20 | 中铁二院工程集团有限责任公司 | A kind of gas integration monitoring tapping equipment for tunnel cavern |
| CN111197498A (en) * | 2020-03-19 | 2020-05-26 | 中国十九冶集团有限公司 | Tunnel gas processing system and method |
| CN111197498B (en) * | 2020-03-19 | 2021-11-19 | 中国十九冶集团有限公司 | Tunnel gas processing system and method |
| CN112943349A (en) * | 2021-04-15 | 2021-06-11 | 中铁九局集团第七工程有限公司 | Comprehensive management construction method for gas of high-gas tunnel |
| CN113445986A (en) * | 2021-07-15 | 2021-09-28 | 中铁二十三局集团第三工程有限公司 | Electric drill is surveyed to gas intelligence that tunnel construction used |
| CN113565553A (en) * | 2021-07-22 | 2021-10-29 | 中交第二公路工程局有限公司 | Ventilation system and general gas tunnel comprehensive rapid disposal system |
| CN117662227A (en) * | 2023-10-23 | 2024-03-08 | 中铁七局集团第四工程有限公司 | Construction method applied to gas tunnel |
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