CN104500138B - Driving face in coal mine coal and gas prominent alarm method - Google Patents
Driving face in coal mine coal and gas prominent alarm method Download PDFInfo
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- CN104500138B CN104500138B CN201410547224.4A CN201410547224A CN104500138B CN 104500138 B CN104500138 B CN 104500138B CN 201410547224 A CN201410547224 A CN 201410547224A CN 104500138 B CN104500138 B CN 104500138B
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- 239000003245 coal Substances 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 362
- 238000012544 monitoring process Methods 0.000 claims abstract description 24
- 239000012491 analyte Substances 0.000 claims abstract description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 2
- 238000007405 data analysis Methods 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 4
- 206010003497 Asphyxia Diseases 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 102220634580 Vacuolar protein-sorting-associated protein 36_T10S_mutation Human genes 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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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)
- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a kind of driving face in coal mine coal and gas prominent alarm methods, this alarm method includes reasonable sensor setting method, pass through real-time monitoring methane concentration, wind direction, the data variation of air velocity transducer and sensor fault, the data variation and sensor fault information of real-time analyte sensors, if the combined situation of Information abnormity meets alert if, then coal and gas prominent alarm and fail secure signal are issued.This alarm method has fully considered the various characteristic features of driving face in coal mine coal and gas prominent, implement simple, it can relatively accurately determine the coal and gas prominent of driving face, it can effectively avoid coal and gas prominent and cause the accidents such as gas explosion, avoid or reduce since gas asphyxiation and gas explosion cause casualties.
Description
Technical field
The present invention relates to a kind of driving face in coal mine coal and gas prominent alarm method, this method is related to sensor and leads to
The fields such as letter.
Background technique
Coal is China's main energy sources, accounts for about non-renewable energy 70%.Coal industry is high risk industries, gas, floods, fire
The accidents such as calamity, top plate, coal dust annoying Safety of Coal Mine Production.China's coal-mine occurs in severe and great casualty, and majority is particularly serious watt
This accident, the number of casualties caused by gas accident be also in all coal mining accidents proportion it is maximum.Therefore, gas accident
It prevents and treats particularly significant.
Gas accident includes the accidents such as gas explosion, coal and gas prominent, gas asphyxiation, gas combustion.To avoid or subtracting
Few coal and gas prominent accident occurs, and there has been proposed a variety of coals or rock and gas outburst prevention treatment methods, in Safety of Coal Mine Production
It is played an important role in work.But existing coal and gas prominent real-time monitoring and forecasting procedure (including microseism, sound emission, electricity
Magnetic radiation, infra-red radiation etc.) rate of false alarm and rate of failing to report it is also higher, it is difficult to meet the needs of Safety of Coal Mine Production.
Coal and gas prominent easily occurs for the driving face of underground coal mine, as can accurately determining the coal and gas in the region
It is prominent, it can effectively avoid coal and gas prominent and cause the accidents such as gas explosion, avoid or reduce since gas asphyxiation and gas are quick-fried
It is fried to cause casualties.
Summary of the invention
The invention proposes a kind of driving face in coal mine coal and gas prominent alarm methods, and the specific method is as follows:
1. coal road, half-coal rock roadway and have Gas stone drifting working face and its return in, exploiting field air inlet,
Exploiting field air return lane, a wing air inlet, a wing air return lane, total air inlet, these regional locations of main return airway place gamut or height
Low dense methane transducer；It is put in digging laneway return, exploiting field air return lane, a wing air return lane and main return airway these regional locations
Set air velocity transducer；Driving face air inlet divide at air port (hereinafter referred to as driving face air inlet), exploiting field air inlet, one
Wing air inlet, these regional locations of total air inlet place wind transducer；It is normal in related substation and power work, sensor position
It installs in correct situation, the above methane concentration of real-time monitoring, wind direction, the data variation of air velocity transducer and sensor event
Barrier, by the data variation and sensor fault information of analyte sensors, if the combined situation of exception information meets alert if,
Coal and gas prominent alarm and fail secure signal are then issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off,
Notice withdraws from coal mine underground operators.
2. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；The methane concentration that digging laneway return methane transducer monitors increases rapidly or reaches alarming value 1.0%
CH4, the wind speed that digging laneway return air velocity transducer monitors be not less than normal value when, issue coal and gas prominent alarm and
Fail secure signal, cuts off underground coal mine whole non-intrinsically safe electrical equipment power supply, and notice withdraws from coal mine underground operators.
3. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；The methane concentration that exploiting field air return lane methane transducer monitors increases rapidly or reaches alarming value 1.0%CH4, adopts
When the wind speed that area's air return lane air velocity transducer monitors is not less than normal value, coal and gas prominent alarm and fail secure letter are issued
Number, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, notice withdraws from coal mine underground operators.
4. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；The methane concentration that one wing air return lane methane transducer monitors increases rapidly or reaches alarming value 0.7%CH4, and one
When the wind speed that wing air return lane air velocity transducer monitors is not less than normal value, coal and gas prominent alarm and fail secure letter are issued
Number, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, notice withdraws from coal mine underground operators.
5. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；The methane concentration that main return airway methane transducer monitors increases rapidly or reaches alarming value 0.7%CH4, total to return
When the wind speed that air way air velocity transducer monitors is not less than normal value, coal and gas prominent alarm and fail secure signal are issued,
Underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, notice withdraws from coal mine underground operators.
6. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；The methane concentration that exploiting field air return lane methane transducer monitors increases rapidly or reaches alarming value 1.0%CH4；One
The methane concentration that wing air return lane methane transducer monitors increases rapidly or reaches alarming value 0.7%CH4；Main return airway methane passes
When the methane concentration that sensor monitors increases rapidly or reach alarming value 0.7%CH4, coal and gas prominent alarm and power-off are issued
Block signal, cuts off underground coal mine whole non-intrinsically safe electrical equipment power supply, and notice withdraws from coal mine underground operators.
7. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；When driving face air inlet wind transducer monitors wind current control, coal and gas prominent alarm and power-off are issued
Block signal, cuts off underground coal mine whole non-intrinsically safe electrical equipment power supply, and notice withdraws from coal mine underground operators.
8. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；When exploiting field air inlet wind transducer monitors wind current control, coal and gas prominent alarm and fail secure are issued
Signal, cuts off underground coal mine whole non-intrinsically safe electrical equipment power supply, and notice withdraws from coal mine underground operators.
9. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；When one wing air inlet wind transducer monitors wind current control, coal and gas prominent alarm and fail secure are issued
Signal, cuts off underground coal mine whole non-intrinsically safe electrical equipment power supply, and notice withdraws from coal mine underground operators.
10. when driving face methane transducer failure or the methane concentration monitored increase rapidly；Digging laneway return air
Stream methane transducer failure or the methane concentration monitored increase rapidly；Total air inlet wind transducer monitors wind current control
When, coal and gas prominent alarm and fail secure signal are issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off,
Notice withdraws from coal mine underground operators.
11. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；When the methane concentration that exploiting field air inlet methane transducer monitors increases rapidly or reaches alarming value 0.5%CH4,
Coal and gas prominent alarm and fail secure signal are issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, is led to
Know and withdraws from coal mine underground operators.
12. working as driving face methane transducer failure, or the methane concentration monitored increases rapidly or reach alarming value
1.0%CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value
1.0%CH4；When the methane concentration that one wing air inlet methane transducer monitors increases rapidly or reaches alarming value 0.5%CH4,
Coal and gas prominent alarm and fail secure signal are issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, is led to
Know and withdraws from coal mine underground operators.
13. when driving face methane transducer failure or the methane concentration monitored increase rapidly；Digging laneway return air
Stream methane transducer failure or the methane concentration monitored increase rapidly；The methane concentration that total air inlet methane transducer monitors
When increasing rapidly or reach alarming value 0.5%CH4, coal and gas prominent alarm and fail secure signal are issued, coal mine is cut off
Lower whole non-intrinsically safe electrical equipment power supply, notice withdraw from coal mine underground operators.
Detailed description of the invention
Fig. 1 underground monitoring system schematic diagram.
Fig. 2 driving face in coal mine sensor mounting location schematic diagram.
Specific embodiment
The alarm method need to be acquired each sensor signal by underground monitoring system, realize data point by monitoring server
It analyses, includes: by underground monitoring system as shown in Figure 1
1. monitoring server (1)；Be responsible for each sensor signal is acquired, is stored, and monitor methane concentration, wind direction,
The data variation and sensor fault of air velocity transducer issue alarm and fail secure by analysis data variation and fault message
Signal cuts off underground coal mine whole non-intrinsically safe electrical equipment power supply.
2. monitoring host computer (2)；Production management personnel check the data variation and sensor event of sensor by monitoring host computer
Barrier can issue alarm and fail secure signal manually, cut off underground coal mine whole non-intrinsically safe electrical equipment power supply, issue tune
Degree instruction notification withdraws from coal mine underground operators.And history monitoring data can be transferred from monitoring server.
3. monitoring guest machine (3)；When monitoring host computer breaks down, worked by monitoring guest machine.
4. the network switch (4)；It is responsible for the management and data exchange of the equipment of all mining Ethernets of access.
5. underground interchanger (5)；It is responsible for the access and data exchange of substation.
6. substation (6)；It is responsible for the access and data exchange of sensor.
7. methane transducer (7)；When methane concentration reaches warning concentration, alarm signal is issued；When methane concentration reaches
When power-off required concentration, relevant range power supply is cut off.
8. air velocity transducer (8)；When wind speed exception, alarm signal is issued.
9. wind transducer (9)；When wind current control occurs, alarm signal is issued.
T2, exploiting field air inlet T5, exploiting field air return lane T6 in driving face T1, driving face return, a wing into
Air way T7, a wing air return lane T8, total air inlet T9, main return airway T10 these regional locations, place gamut respectively or height is dense
Methane transducer T1J, T2J, T5J, T6J, T7J, T8J, T9J, T10J；Wherein T8J and T10J alarming value is set as methane concentration
0.7%；T5J, T7J, T9J alarming value are set as methane concentration 0.5%；T1J, T2J, T6J alarming value are set as methane concentration
1.0%.
In digging laneway return T2, exploiting field air return lane T6, a wing air return lane T8 and these regions main return airway T10 position
It sets, places air velocity transducer T2S, T6S, T8S, T10S respectively；
Divide air port T3, exploiting field air inlet T5, a wing air inlet T7, total these areas air inlet T9 in driving face air inlet
Wind transducer T3F, T5F, T7F, T9F are placed in domain position respectively.
Position is arranged as shown in Fig. 2, specifically including in driving face sensor:
1. driving face position, methane transducer (201) T1J.
2. digging laneway return position, methane transducer (202) T2J and air velocity transducer (203) T2S.
3. driving face air inlet divides tuyere position, air velocity transducer (204) T3F.
Monitoring server real time sensor data, when some methane transducer catastrophic failure of discovery or the methane monitored are dense
Degree increases or reaches alarming value rapidly, then determines the methane transducer data exception；When finding the alarm of some wind transducer, then
Determine the wind transducer data exception；It is not less than air velocity transducer when normal value with reference to the wind speed monitored；According to
Following breakdown judge table judges whether to meet alert if, if met, alarm.
Claims (11)
1. a kind of driving face in coal mine coal and gas prominent alarm method, it is characterised in that: underground coal mine, in coal road, half coal
Rock gangway and have in the stone drifting working face and its return of Gas, exploiting field air inlet, exploiting field air return lane, a wing air inlet
Lane, a wing air return lane, total air inlet, main return airway place gamut or the dense methane transducer of height；Digging laneway return,
Exploiting field air return lane, a wing air return lane and main return airway place air velocity transducer；Driving face air inlet divide at air port, exploiting field
Air inlet, a wing air inlet, total air inlet place wind transducer；Normal, the sensor position in related substation and power work
It is arranged in correct situation, the above methane of real-time monitoring, wind direction, the data variation of air velocity transducer and sensor fault, in real time
The data variation and sensor fault information of analyte sensors are then issued if the combined situation of Information abnormity meets alert if
Coal and gas prominent alarm and fail secure signal, cut off underground coal mine whole non-intrinsically safe electrical equipment power supply, and notice is removed
Coal mine underground operators out；Alert if includes:
A) driving face methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value 1.0%
CH4；The methane concentration that digging laneway return methane transducer monitors increases rapidly or reaches alarming value 1.0%CH4, driving
When the wind speed that tunnel return air velocity transducer monitors is not less than normal value；
B) driving face methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value 1.0%
CH4；Digging laneway return methane transducer failure, or the methane concentration monitored increase rapidly or reach alarming value 1.0%
CH4；When a point air port wind transducer for driving face air inlet monitors wind current control；
The alarm method need to be acquired each sensor signal by underground monitoring system, realize data analysis, institute by monitoring server
State underground monitoring system include monitoring server, monitoring host computer, monitoring guest machine, the network switch, underground interchanger, substation,
Methane transducer, air velocity transducer, wind transducer；Monitoring server is responsible for being acquired each sensor signal, storing, and
Methane concentration, wind direction, the data variation of air velocity transducer and sensor fault are monitored, analysis data variation and fault message are passed through
Alarm and fail secure signal are issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off.
2. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；The methane concentration that exploiting field air return lane methane transducer monitors is fast
Speed increases or reaches alarming value 1.0%CH4, when the wind speed that exploiting field air return lane air velocity transducer monitors is not less than normal value, hair
Coal and gas prominent alarm and fail secure signal out cut off underground coal mine whole non-intrinsically safe electrical equipment power supply, notice
Withdraw from coal mine underground operators.
3. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；The methane concentration that one wing air return lane methane transducer monitors is fast
Speed increases or reaches alarming value 0.7%CH4, when the wind speed that a wing air return lane air velocity transducer monitors is not less than normal value, hair
Coal and gas prominent alarm and fail secure signal out cut off underground coal mine whole non-intrinsically safe electrical equipment power supply, notice
Withdraw from coal mine underground operators.
4. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；The methane concentration that main return airway methane transducer monitors is rapid
Increase or reach alarming value 0.7%CH4, when the wind speed that main return airway air velocity transducer monitors is not less than normal value, issues coal
With Gas Outburst alarm and fail secure signal, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, notice is withdrawn from
Coal mine underground operators.
5. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；The methane concentration that exploiting field air return lane methane transducer monitors is fast
Speed increases or reaches alarming value 1.0%CH4；The methane concentration that one wing air return lane methane transducer monitors increases or reaches rapidly
Alarming value 0.7%CH4；The methane concentration that main return airway methane transducer monitors increases rapidly or reaches alarming value 0.7%CH4
When, coal and gas prominent alarm and fail secure signal are issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off,
Notice withdraws from coal mine underground operators.
6. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；When exploiting field air inlet wind transducer monitors wind current control,
Coal and gas prominent alarm and fail secure signal are issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, is led to
Know and withdraws from coal mine underground operators.
7. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；When one wing air inlet wind transducer monitors wind current control,
Coal and gas prominent alarm and fail secure signal are issued, underground coal mine whole non-intrinsically safe electrical equipment power supply is cut off, is led to
Know and withdraws from coal mine underground operators.
8. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure monitors
Methane concentration increases rapidly；Digging laneway return methane transducer failure or the methane concentration monitored increase rapidly；Always into
When air way wind transducer monitors wind current control, coal and gas prominent alarm and fail secure signal are issued, coal mine is cut off
Lower whole non-intrinsically safe electrical equipment power supply, notice withdraw from coal mine underground operators.
9. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；The methane concentration that exploiting field air inlet methane transducer monitors is fast
When speed increases or reach alarming value 0.5%CH4, coal and gas prominent alarm and fail secure signal are issued, underground coal mine is cut off
Whole non-intrinsically safe electrical equipment power supplys, notice withdraw from coal mine underground operators.
10. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；Digging laneway return methane transducer failure, or monitor
Methane concentration increase or reach alarming value 1.0%CH4 rapidly；The methane concentration that one wing air inlet methane transducer monitors is fast
When speed increases or reach alarming value 0.5%CH4, coal and gas prominent alarm and fail secure signal are issued, underground coal mine is cut off
Whole non-intrinsically safe electrical equipment power supplys, notice withdraw from coal mine underground operators.
11. alarm method as described in claim 1, it is characterised in that: driving face methane transducer failure monitors
Methane concentration increase rapidly；Digging laneway return methane transducer failure or the methane concentration monitored increase rapidly；Always
When the methane concentration that air inlet methane transducer monitors increases rapidly or reach alarming value 0.5%CH4, issues coal and gas is prominent
Alarm and fail secure signal out, cut off underground coal mine whole non-intrinsically safe electrical equipment power supply, and notice withdraws from underground coal mine
Operating personnel.
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| CN201410547224.4A CN104500138B (en) | 2014-10-16 | 2014-10-16 | Driving face in coal mine coal and gas prominent alarm method |
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| CN201410547224.4A CN104500138B (en) | 2014-10-16 | 2014-10-16 | Driving face in coal mine coal and gas prominent alarm method |
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| CN104500138B true CN104500138B (en) | 2019-05-07 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647557B (en) * | 2016-10-21 | 2024-02-06 | 中国矿业大学(北京) | Mine explosion monitoring alarm and control system |
| US20200019128A1 (en) * | 2016-11-10 | 2020-01-16 | 3M Innovative Properties Company | Systems and methods for supervision of local analytics |
| CN107725110A (en) * | 2017-12-01 | 2018-02-23 | 中国矿业大学(北京) | Based on ranging and the driving face calamity forecast system to test the speed |
| CN109458222A (en) * | 2018-10-10 | 2019-03-12 | 国家能源投资集团有限责任公司 | The method and device of compressed-air system is latched when gas exceeding limit |
| CN110985129B (en) * | 2019-12-31 | 2021-06-01 | 中煤科工集团重庆研究院有限公司 | Coal and gas outburst catastrophe identification method for coal mining working face |
| CN111648828B (en) * | 2020-06-16 | 2022-01-18 | 福州大学 | Intelligent control sulfur iron mine underground working face SO2Method of concentration |
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| SU1333778A1 (en) * | 1986-02-27 | 1987-08-30 | Государственный Проектно-Конструкторский И Научно-Исследовательский Институт По Автоматизации Угольной Промышленности | Arrangement for gas protection of coal mines |
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