CN103364104A - System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface - Google Patents
System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface Download PDFInfo
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- CN103364104A CN103364104A CN2013102855156A CN201310285515A CN103364104A CN 103364104 A CN103364104 A CN 103364104A CN 2013102855156 A CN2013102855156 A CN 2013102855156A CN 201310285515 A CN201310285515 A CN 201310285515A CN 103364104 A CN103364104 A CN 103364104A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2213/00—Temperature mapping
Abstract
The invention provides a system and a method for sensing and monitoring the temperature of a fiber bragg grating in a goaf of a coal mine coalface, belonging to the system and the method for sensing and monitoring the temperature of the fiber bragg grating in the goaf. 3-5 monitoring stations are distributed in the goaf, each monitoring station comprises 10-12 fiber bragg grating temperature sensors, the fiber bragg grating temperature sensors in each monitoring station are connected with one another in series by the tail of optical fibers, the tail of the optical fibers of the lead-out ends of the fiber bragg grating temperature sensors are connected with communication optical fibers, the communication optical fibers are connected with a mine transmission optical cable through an optical fiber terminal box, the mine transmission optical cable is connected with an input end of a fiber bragg grating static state interrogator, and an output end of the fiber bragg grating static state interrogator is connected with a monitoring computer. The system and the method provided by the invention have the advantages that the temperature sensing precision is high, the device is convenient to install, the method is convenient, the temperature can be timely monitored on line at large area, long distance, large range, long distance and long period in the goaf of the coal mine coalface, the advanced early warning and the out-of-limit alarm to the fire can be carried out, and the accident happening of the spontaneous combustion of coal in the goaf of the coal mine coalface can be greatly reduced.
Description
Technical field
The present invention relates to a kind of coal mine working face goaf temperature-sensitive monitoring system and method, specifically a kind of coal face goaf optical fiber and grating sensing temperature monitoring system and method,
Background technology
China is the country of coal production maximum in the world, also is that spontaneous combustion of coal seam is got angry one of the most serious country, not only can come serious economic loss by the coal supply mine belt, and can cause the injures and deaths of a large amount of coal mine personnels.According to statistics, the mine that has spontaneous combustion danger in China's State owned coal mine accounts for 51.3%, accounts for more than 90% of total mine fire, since spontaneous combustion of coal seam, about 200,000,000 tons of China's annual loss coal resources; Simultaneously, coal spontaneous combustion also is one of reason that leads to the great serious accident of coal mine gas from explosion.As seen, spontaneous fire in coal mine becomes one of principal element of restriction mine safety High-efficient Production and development.
It is the improvement emphasis of anti-fire-fighting work that spontaneous combustion of coal seam is got angry, and most spontaneous combustions occur in the goaf.Increase along with the coal mining degree of depth, increasing substantially of mining machines degree, exploitation rate is accelerated day by day, and the fully-mechanized mining working float coal thickness is large, cause the goaf area constantly to increase, the enlarged in thickness that coal is left in the goaf occurred, caused coal spontaneous ignition Frequent Accidents in the goaf, and fully-mechanized mining working output is large, equipment is smart, certainly will cause huge economic loss in case spontaneous combustion occurs.Therefore, the spontaneous combustion of control goaf coal is the emphasis that guarantees the safe and efficient production of China's coal-mine.
At present, the automatic monitoring of China's coal-mine freely burning fire and warning system all adopt the sensor of pyroelectric signal on principle, comprise thermistor (temperature) sensor and thermocouple sensor.They all are to use pyroelectric signal to process, and therefore relatively responsive to environment, can the quality of surrounding environment directly have influence on system and normally move.Simultaneously, sensor needs Power supply, and the signal of transmission is electric signal, antijamming capability a little less than, reliability is lower, environment is abominable in the goaf, therefore there are many potential safety hazards; And signal transmission distance is short, can not realize long-term on-line real time monitoring on a large scale.
Summary of the invention
Technical matters: in order to overcome deficiency of the prior art, the objective of the invention is in order to adapt to present mine safety High-efficient Production, satisfy the coal mine downhole safety needs, provide a kind of easy for installation, method is easy, essential safety, there are optical fiber transmission signal, long distance of signal transmission without potential safety hazard, measuring accuracy is high, coal face goaf optical fiber and grating sensing temperature monitoring system and the method for good reliability.
Technical scheme: purpose of the present invention is achieved through the following technical solutions: a kind of coal face goaf optical fiber and grating sensing temperature monitoring system comprises the static (FBG) demodulator of fiber grating, supervisory control comuter, the webserver, client, mining transmission cable, optical fiber terminal box, the first communication optical fiber, the second communication optical fiber, monitoring survey station, fiber-optical grating temperature sensor, optical fiber pigtail; In the goaf, lay 3～5 monitoring survey stations, comprise 10～12 fiber-optical grating temperature sensors in each monitoring survey station, be cascaded by optical fiber pigtail between the fiber-optical grating temperature sensor in each monitoring survey station, with the exit optical fiber pigtail of fiber-optical grating temperature sensor respectively with the first communication optical fiber be connected communication optical fiber and be connected, by optical fiber terminal box with the first communication optical fiber be connected communication optical fiber and be connected with mining transmission cable, mining transmission cable is connected with the input end of the static (FBG) demodulator of fiber grating, the output terminal of the static (FBG) demodulator of fiber grating is connected with supervisory control comuter, supervisory control comuter passes through the webserver, colliery LAN (Local Area Network) and client are carried out data sharing, form the optical fiber and grating sensing temperature monitoring system of the full optical-fibre communications in coal face goaf.
Described monitoring survey station is embarked on journey and is spaced, and the between-line spacing distance is 15～20 meters.
Described fiber-optical grating temperature sensor is spaced, and spacing distance is 10～15 meters.
The connected mode that described fiber-optical grating temperature sensor is cascaded is that optical fiber pigtail links together by the optical fiber splicer welding or by fiber coupler;
The embedded interpretation software of described supervisory control comuter can be inputted, receives, storage, historical query, real-time pictures show, tabulation shows, the warning early warning.
A kind of coal face goaf optical fiber and grating sensing temperature the method for monitoring:
A, mining transmission cable are divided into two passages by optical fiber terminal box, and two passages connect respectively the first communication optical fiber and the second communication optical fiber;
B, cloth is established first a monitoring survey station in the goaf, one group of fiber-optical grating temperature sensor is arranged at the interval in the monitoring survey station, the spacing distance of fiber-optical grating temperature sensor is 10～15 meters, the fiber-optical grating temperature sensor that to monitor in the survey station by optical fiber pigtail is cascaded, along with pushing ahead of coal-face, when being 15～20 meters, lays spacing distance next monitoring survey station, until finish the monitoring survey station number of setting;
C, the first communication optical fiber and the second communication optical fiber are laid the up and down two ends to coal-face, and are connected with the exit optical fiber pigtail of monitoring survey station inner fiber grating temperature sensor;
D, all fiber-optical grating temperature sensors install, and namely enter duty, monitoring goaf temperature variation;
E, the lightwave signal of fiber-optical grating temperature sensor collection is transferred to the static (FBG) demodulator of fiber grating by FIBER OPTIC FIBERS ﹠ CABLE, by the static (FBG) demodulator of fiber grating lightwave signal is demodulated into digital signal, then transfer to supervisory control comuter, carrying out data by the interpretation software that is installed in supervisory control comuter processes, show in real time goaf temperature data and variation tendency, when the temperature threshold of temperature data surpass to be set goaf, early warning and warning occur;
F, by colliery LAN (Local Area Network) 4 and the webserver 3, the goaf temperature data of monitoring is carried out full ore deposit shares, realize the online real-time remote monitoring of coal work face goaf whole day.
Beneficial effect: owing to having adopted such scheme, the present invention has the following advantages:
The present invention has adopted the temperature in the fiber-optical grating temperature sensor monitoring goaf, the high-end connection devices such as the static (FBG) demodulator of fiber grating, optical fiber terminal box and optical fiber splitter have been configured, temperature measurement accuracy is high, easy for installation, method is easy, the fiber-optical grating temperature sensor essential safety, can effectively avoid electromagnetic interference (EMI) under the complicated rugged surroundings impact, exist without potential safety hazard; Carry out the transmission of temperature signal by optical fiber, long distance of signal transmission, safe and reliable and stable; Realize the coal work face goaf carry out large tracts of land, long distance, on a large scale, at a distance, long-term temperature in real time, on-line monitoring, response time is short, can be in time and goaf temperature monitoring result is provided accurately, and fire given warning in advance and overload alarm, the accident that greatly reduces the goaf spontaneous combustion of coal occurs, adapt to the safe and efficient production in present colliery, satisfied the coal mine downhole safety needs, promoted research work.
Description of drawings
Fig. 1 is temperature-sensitive monitoring system structural drawing of the present invention.
Among the figure, 1, the static (FBG) demodulator of fiber grating; 2, supervisory control comuter; 3, the webserver; 4, colliery LAN (Local Area Network); 5, client; 6, mining transmission cable; 7, optical fiber terminal box; 80, the first communication optical fiber; 81, the second communication optical fiber 9, coal-face; 10, monitoring survey station; 11, fiber-optical grating temperature sensor; 12, goaf; 100, optical fiber pigtail.
Embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
Embodiment 1: a kind of coal face goaf optical fiber and grating sensing temperature monitoring system, 3～5 monitoring survey stations 10 of 12 interior layings in the goaf, monitoring survey station 10 is embarked on journey and is spaced, the between-line spacing distance is 15～20 meters, comprise 10～12 fiber-optical grating temperature sensors 11 in each monitoring survey station 10, the spacing distance of fiber-optical grating temperature sensor 11 is 10～15 meters, the fiber-optical grating temperature sensor 11 that to monitor in the survey station 10 by optical fiber pigtail 100 utilizes the mode of optical fiber splicer welding or fiber coupler connection to be cascaded, with the exit optical fiber pigtail 100 of fiber-optical grating temperature sensor 11 and the first communication optical fiber 80 be connected communication optical fiber 81 and be connected, by optical fiber terminal box 7 with the first communication optical fiber 80 be connected communication optical fiber 80 and be connected with mining transmission cable 6, mining transmission cable 6 is connected with the input end of the static (FBG) demodulator 1 of fiber grating, the output terminal of the static (FBG) demodulator 1 of fiber grating is connected with supervisory control comuter 2, supervisory control comuter 2 is by the webserver 3, colliery LAN (Local Area Network) 4 is carried out data sharing with client 5, forms the optical fiber and grating sensing temperature monitoring system of the full optical-fibre communications in coal face goaf.
Described monitoring survey station is embarked on journey and is spaced, and the between-line spacing distance is 15～20 meters.
Described fiber-optical grating temperature sensor is spaced, and spacing distance is 10～15 meters.
The connected mode that described fiber-optical grating temperature sensor is cascaded is that optical fiber pigtail links together by the optical fiber splicer welding or by fiber coupler; Described fiber coupler is the skinny device of two optical fiber of connection of routine.
The embedded interpretation software of described supervisory control comuter can be inputted, receives, storage, historical query, real-time pictures show, tabulation shows, the warning early warning.
A kind of coal face goaf optical fiber and grating sensing temperature the method for monitoring:
A, mining transmission cable are divided into two passages by optical fiber terminal box, and two passages are connecting communication optical fiber respectively;
B, cloth is established first a monitoring survey station in the goaf, one group of fiber-optical grating temperature sensor is arranged at the interval in the monitoring survey station, the spacing distance of fiber-optical grating temperature sensor is 10～15 meters, the fiber-optical grating temperature sensor that to monitor in the survey station by optical fiber pigtail is cascaded, along with pushing ahead of coal-face, when being 15～20 meters, lays spacing distance next monitoring survey station, until finish the monitoring survey station number of setting;
C, two communication optical fibers are laid the up and down two ends to coal-face, and are connected with the exit optical fiber pigtail of monitoring survey station inner fiber grating temperature sensor;
D, all fiber-optical grating temperature sensors install, and namely enter duty, monitoring goaf temperature variation;
E, the lightwave signal of fiber-optical grating temperature sensor collection is transferred to the static (FBG) demodulator of fiber grating by FIBER OPTIC FIBERS ﹠ CABLE, by the static (FBG) demodulator of fiber grating lightwave signal is demodulated into digital signal, then transfer to supervisory control comuter, carrying out data by the interpretation software that is installed in supervisory control comuter processes, show in real time goaf temperature data and variation tendency, when the temperature threshold of temperature data surpass to be set goaf, early warning and warning occur;
F, by colliery LAN (Local Area Network) and the webserver, the goaf temperature data of monitoring is carried out full ore deposit shares, realize the online real-time remote monitoring of coal work face goaf whole day.
Coal face of the present invention goaf optical fiber and grating sensing temperature monitoring system and method, arrange some monitoring survey stations in the goaf, use fiber-optical grating temperature sensor in the survey station, the down-hole utilizes the high-end connection devices such as optical fiber terminal box and optical fiber splitter, system's temperature measurement accuracy is high, easy for installation, method is easy, the fiber-optical grating temperature sensor essential safety, can effectively avoid electromagnetic interference (EMI) under the complicated rugged surroundings impact, exist without potential safety hazard; Carry out the transmission of temperature signal by optical fiber, long distance of signal transmission, safe and reliable and stable; Realize the coal work face goaf carry out large tracts of land, long distance, on a large scale, at a distance, long-term temperature in real time, on-line monitoring, response time is short, can be in time and goaf temperature monitoring result is provided accurately, and fire given warning in advance and overload alarm, the accident that greatly reduces the goaf spontaneous combustion of coal occurs, adapt to the safe and efficient production in present colliery, satisfied the coal mine downhole safety needs, promoted research work.
Claims (6)
1. coal face goaf optical fiber and grating sensing temperature monitoring system, it is characterized in that: this monitoring system comprises the static (FBG) demodulator of fiber grating, supervisory control comuter, the webserver, client, mining transmission cable, optical fiber terminal box, the first communication optical fiber, the second communication optical fiber, monitoring survey station, fiber-optical grating temperature sensor, optical fiber pigtail; In the goaf, lay 3～5 monitoring survey stations, comprise 10～12 fiber-optical grating temperature sensors in each monitoring survey station, be cascaded by optical fiber pigtail between the fiber-optical grating temperature sensor in each monitoring survey station, with the exit optical fiber pigtail of fiber-optical grating temperature sensor respectively with the first communication optical fiber be connected communication optical fiber and be connected, by optical fiber terminal box with the first communication optical fiber be connected communication optical fiber and be connected with mining transmission cable, mining transmission cable is connected with the input end of the static (FBG) demodulator of fiber grating, the output terminal of the static (FBG) demodulator of fiber grating is connected with supervisory control comuter, supervisory control comuter passes through the webserver, colliery LAN (Local Area Network) and client are carried out data sharing, form the optical fiber and grating sensing temperature monitoring system of the full optical-fibre communications in coal face goaf.
2. according to claims 1 described a kind of coal face goaf optical fiber and grating sensing temperature monitoring system, it is characterized in that: described monitoring survey station is embarked on journey and is spaced, and the between-line spacing distance is 15～20 meters.
3. according to claims 1 described a kind of coal face goaf optical fiber and grating sensing temperature monitoring system, it is characterized in that: described fiber-optical grating temperature sensor is spaced, and spacing distance is 10～15 meters.
4. according to claims 1 described a kind of coal face goaf optical fiber and grating sensing temperature monitoring system, it is characterized in that: the connected mode that described fiber-optical grating temperature sensor is cascaded is that optical fiber pigtail links together by the optical fiber splicer welding or by fiber coupler.
5. according to claims 1 described a kind of coal face goaf optical fiber and grating sensing temperature monitoring system, it is characterized in that: the embedded interpretation software of described supervisory control comuter, can input, receive, storage, historical query, real-time pictures show, tabulation shows, the warning early warning.
6. coal face goaf optical fiber and grating sensing temperature the method for monitoring, it is characterized in that: method step is:
A, mining transmission cable are divided into two passages by optical fiber terminal box, and two passages are connecting communication optical fiber respectively;
B, cloth is established first a monitoring survey station in the goaf, one group of fiber-optical grating temperature sensor is arranged at the interval in the monitoring survey station, the spacing distance of fiber-optical grating temperature sensor is 10～15 meters, the fiber-optical grating temperature sensor that to monitor in the survey station by optical fiber pigtail is cascaded, along with pushing ahead of coal-face, when being 15～20 meters, lays spacing distance next monitoring survey station, until finish the monitoring survey station number of setting;
C, two communication optical fibers are laid the up and down two ends to coal-face, and are connected with the exit optical fiber pigtail of monitoring survey station inner fiber grating temperature sensor;
D, all fiber-optical grating temperature sensors install, and namely enter duty, monitoring goaf temperature variation;
E, the lightwave signal of fiber-optical grating temperature sensor collection is transferred to the static (FBG) demodulator of fiber grating by FIBER OPTIC FIBERS ﹠ CABLE, by the static (FBG) demodulator of fiber grating lightwave signal is demodulated into digital signal, then transfer to supervisory control comuter, carrying out data by the interpretation software that is installed in supervisory control comuter processes, show in real time goaf temperature data and variation tendency, when the temperature threshold of temperature data surpass to be set goaf, early warning and warning occur;
F, by colliery LAN (Local Area Network) and the webserver, the goaf temperature data of monitoring is carried out full ore deposit shares, realize the online real-time remote monitoring of coal work face goaf whole day.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310285515.6A CN103364104B (en) | 2013-07-08 | 2013-07-08 | System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface |
| RU2016103330A RU2620324C1 (en) | 2013-07-08 | 2014-01-27 | Carried out on the basis of lattice fiber-optic system of monitoring and temperature measurement and corresponding way for developed action slaughtering space in coal mining |
| PCT/CN2014/071567 WO2015003487A1 (en) | 2013-07-08 | 2014-01-27 | Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine |
| AU2014289870A AU2014289870B2 (en) | 2013-07-08 | 2014-01-27 | Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine |
| ZA2016/00755A ZA201600755B (en) | 2013-07-08 | 2016-02-03 | Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310285515.6A CN103364104B (en) | 2013-07-08 | 2013-07-08 | System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface |
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| Publication Number | Publication Date |
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| CN103364104A true CN103364104A (en) | 2013-10-23 |
| CN103364104B CN103364104B (en) | 2015-04-01 |
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Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN103364104B (en) |
| AU (1) | AU2014289870B2 (en) |
| RU (1) | RU2620324C1 (en) |
| WO (1) | WO2015003487A1 (en) |
| ZA (1) | ZA201600755B (en) |
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| CN103528732A (en) * | 2013-10-25 | 2014-01-22 | 中国矿业大学 | Coal mine goaf top plate strain monitoring system and method based on fiber bragg grating sensing |
| CN104236605A (en) * | 2014-10-11 | 2014-12-24 | 上海海事大学 | Coal mine fiber brag grating system for reducing accident rate |
| WO2015003487A1 (en) * | 2013-07-08 | 2015-01-15 | 中国矿业大学 | Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine |
| CN104948171A (en) * | 2014-03-25 | 2015-09-30 | 煤科集团沈阳研究院有限公司 | Temperature measurement system of coal mine gob area |
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| CN106870005A (en) * | 2017-02-28 | 2017-06-20 | 安徽中科智泰光电测控科技有限公司 | A kind of stope working surface of coal mines dynamic monitor and its control method |
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| CN111594252A (en) * | 2020-05-26 | 2020-08-28 | 辽宁工程技术大学 | Method for preventing and treating spontaneous combustion of coal in goaf during exploitation of extremely spontaneous combustion coal seam |
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| CN107178386A (en) * | 2017-07-24 | 2017-09-19 | 贵州大学 | A kind of system for preventing goaf coal body spontaneous combustion |
| CN111119859B (en) * | 2019-12-20 | 2020-11-20 | 中国石油大学(华东) | Near-bit multi-parameter measurement system and method based on fiber bragg grating |
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Also Published As
| Publication number | Publication date |
|---|---|
| AU2014289870A1 (en) | 2016-02-25 |
| RU2620324C1 (en) | 2017-05-24 |
| WO2015003487A1 (en) | 2015-01-15 |
| CN103364104B (en) | 2015-04-01 |
| AU2014289870B2 (en) | 2017-06-15 |
| ZA201600755B (en) | 2017-09-27 |
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