AU2014289871B2 - Optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system - Google Patents
Optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 139
- 239000013307 optical fiber Substances 0.000 title claims abstract description 126
- 239000003245 coal Substances 0.000 title claims abstract description 112
- 238000012545 processing Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 238000005065 mining Methods 0.000 claims abstract description 21
- 230000003068 static effect Effects 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 238000012098 association analyses Methods 0.000 claims description 7
- 238000010835 comparative analysis Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 6
- 231100000279 safety data Toxicity 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 208000032365 Electromagnetic interference Diseases 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 17
- 238000009423 ventilation Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000009172 bursting Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- 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
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Abstract
An optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system comprising an aboveground part and an underground part. The aboveground part comprises an optical fiber grating static demodulator, a computer data processing system, a printer, a server, and a client. The underground part comprises a light switch array, a work surface safety monitoring subsystem, and a tunnel safety monitoring subsystem. Both of the monitoring subsystems at least comprise one monitoring base station. Each monitoring base station at least comprises one monitoring station. Each monitoring station corresponds to a set of optical fiber grating sensors. The monitoring system employs multiple monitoring stations, monitors multiple parameters underground, is integrated with the optical fiber grating sensors, employs all-optical measurement and optical fibers for signal transmission, is intrinsically safe, has a strong resistance against electromagnetic interferences, provides great monitoring effects, and implements real-time continuous long-term online monitoring and mining area-wide data sharing, thus improving guidance for safe production of coal, allowing for effectively reduced occurrence of coal mine safety incidents, and implementing safe and highly efficient production of coal.
Description
Optical Fiber Grating Sensor-Based Coal Mine Underground Safety Comprehensive 2014289871 09 Feb 2017
Monitoring System
Field of the Invention
The present invention relates to a coal mine underground safety monitoring system, in particular to an optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system.
Background
In recent years, with continuous improvement of mining techniques, the mining industry in China has been developed more rapidly in a better way. As a basis for the development of other industries, safety production of coal mines takes a crucial role in social progress and improvement of national economy. However, as the coal mining depth increases, the underground pressure and safety pressure in coal mines become higher and higher, and the resultant disasters become more and more serious; for example, accidents such as roof caving, tunnel deformation, pressure bump, gas explosion, coal mining water inrush and coal mining fire disaster occur frequently, therefore, result in severe losses in the coal mining industry in China and bring a strong impact on the life safety of workers and the safety of mine production. If an advanced on-line underground pressure monitoring and early-warning system can be built up, the production at the working face can be monitored effectively, and the occurrence of accidents resulted from underground pressure can be effectively prevented and reduced.
Presently, some achievements have been made in products and equipment developed for the coal mine underground safety monitoring field, such as single-chip controlled vibrating-wire sensors, resistance strain chip sensors and gas sensors, etc. Coal mine underground monitoring measures mainly include: installing fully-mechanized mining support pressure sensors on the hydraulic supports at the fully-mechanized mining face underground the coal mine, installing roof separation sensors on the tunnel roof, installing bearing stress sensors in the coal and rock mass, installing anchor rod stress sensors on shoring anchor rods for the surrounding rock of tunnel, deploying gas sensors at the working face, and deploying temperature sensors in the goaf. However, the above-mentioned monitoring measures still have the following drawbacks: 1. the monitoring accuracy is poor owing to susceptibility to electromagnetic interference and external environmental interference; 2. the device is not moisture resistant, has low reliability and short service life, and cannot meet the requirements for long-term monitoring; 3. the level of automation is low and the data acquisition is inconvenient, because the data acquisition spots are deployed separately and the data has to be read manually or acquired by infrared sensing. 1
The references herein to and descriptions of prior proposals or products are not intended to be, and are not to be construed as, statements or admissions of common general knowledge in the art. 2014289871 09 Feb 2017
It is an object of the present invention to ameliorate one or more of the disadvantages of the prior art described above, or to at least provide a useful alternative thereto.
Preferred objects of the present invention include: To adapt to safe and efficient production in coal mines, and meet the requirement for underground safety in coal mines.
Summary of Invention
According to the present invention, there is provided an optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system, wherein, it comprises an aboveground part and an underground part, the aboveground part comprises an optical fiber grating static demodulator, a computer data processing system, a printer, a server, and clients, the client is interconnected with the server through a coal mine LAN, and the optical fiber grating static demodulator is connected to the underground part through a mining transmission cable; the underground part comprises an optical switch array, a working face safety monitoring subsystem, and a tunnel safety monitoring subsystem; one channel of the optical switch array is connected with the working face safety monitoring subsystem through a communication optical fiber, the working face safety monitoring subsystem at least comprises one working face monitoring base station, wherein, each working face monitoring base station at least comprises one monitoring station, and each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating support pressure sensor, an optical fiber grating gas sensor and an optical fiber grating temperature sensor; the other channel of the optical switch array is connected with the tunnel safety monitoring subsystem through a communication optical fiber, and the tunnel safety monitoring subsystem at least comprises one tunnel monitoring base station, wherein, each tunnel monitoring base station at least comprises one monitoring station, and each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating drilling stress sensor, an optical fiber grating separation monitoring sensor, an optical fiber grating wind speed sensor, an optical fiber grating anchor cable stress sensor, an optical fiber grating water pressure sensor and an optical fiber grating anchor rod stress sensor; monitoring spots are deployed in the underground part of the coal mine, and optical fiber grating sensors are installed in the working face safety monitoring subsystem and the tunnel safety monitoring subsystem, so as to monitor the safety parameters of the coal mine, the output port of the optical fiber grating static demodulator is connected to the computer data processing system through a network interface or RS232 interface or USB interface, the computer data processing system has built-in demodulation, analysis, and processing software, 2 and comprises the following modules: 2014289871 09 Feb 2017 (a) input module, including coal mine parameter input, early-warning and alarm threshold input, and automatic acquisition functions; (b) management module, including history search, data sharing, and automatic storage functions; (c) analysis module, including trend analysis, multi-parameter association analysis, and comparative analysis functions; (d) output module, including out-of-limit alarming, risk forecasting, comprehensive reporting, and real-time curve functions.
Preferably, the processing steps of the demodulation, analysis, and processing software include: step 1: numbering, classifying, and grouping the optical fiber grating sensors; step 2: setting parameters and thresholds of early-warning and alarm for the optical fiber grating sensors according to the conditions in the coal mine; step 3: demodulating the coal mine safety data monitored by the optical fiber grating sensors in real time via the optical fiber grating static demodulator; comparing the received real-time data obtained by the demodulation, analysis, and processing software with the thresholds of early-warning and alarm; and, sending an incident early-warning or alarm message from the demodulation, analysis, and processing software, and storing the real-time data into a monitoring parameter database at the same time, if the comparison result indicates that a threshold is exceeded; step 4: carrying out trend analysis, multi-parameter association analysis and comparative analysis with the data in the monitoring parameter database; step 5: carrying out the following functional processing, according to the relevant parameters of the tunnel and working face in coal mine and the result of analysis: 1. output comprehensive prediction of underground risk in the coal mine; 2. display the monitoring curves of underground safety parameters in the coal mine in real time; 3. share data information through coal mine LAN; 4. generate comprehensive reports; 5. perform history searches; thus, safety measures can be taken to ensure safe and efficient production in the coal mine. 3
Description of the Drawings 2014289871 09 Feb 2017
In order that the present invention might be more fully understood, embodiments of the present invention will be described, by way of example only, with reference to the accompanying drawings, however, it is to be understood that the features illustrated in and described with reference to the drawings are not to be construed as limiting on the scope of the invention:
Fig. 1 is a structural schematic diagram of the overall layout according to an embodiment of the present invention;
Fig. 2 is a function module block diagram of the computer data processing system according to an embodiment of the present invention;
Fig. 3 is a block diagram of the composition of the working face monitoring substations according to an embodiment of the present invention;
Fig. 4 is a block diagram of the composition of the tunnel monitoring substations according to an embodiment of the present invention;
Fig. 5 is a flow diagram of the data processing procedures according to an embodiment of the present invention.
Detailed Description of the Embodiments
Referring to the accompanying drawings, the present embodiment provides an optical fiber grating sensor-based coal mine underground comprehensive safety monitoring system, which can attain a good monitoring result and high monitoring accuracy, has high reliability and high anti-electromagnetic interference capability, and supports real-time on-line long-term monitoring.
The embodiment has the following technical scheme: an optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system, wherein, it comprises an aboveground part and an underground part, the aboveground part comprises an optical fiber grating static demodulator, a computer data processing system, a printer, a server, and clients, the client is interconnected with the server through a coal mine LAN, and the optical fiber grating static demodulator is connected to the underground part through a mining transmission cable; the underground part comprises an optical switch array, a working face safety monitoring subsystem, and a tunnel safety monitoring subsystem; one channel of the optical switch array is connected with the working face safety monitoring subsystem through a communication optical fiber, the working face safety monitoring subsystem at least comprises one working face monitoring base station, wherein, each working face monitoring base station at least comprises one monitoring station, and 4 each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating support pressure sensor, an optical fiber grating gas sensor and an optical fiber grating temperature sensor; the other channel of the optical switch array is connected with the tunnel safety monitoring subsystem through a communication optical fiber, and the tunnel safety monitoring subsystem at least comprises one tunnel monitoring base station, wherein, each tunnel monitoring base station at least comprises one monitoring station, and each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating drilling stress sensor, an optical fiber grating separation monitoring sensor, an optical fiber grating wind speed sensor, an optical fiber grating anchor cable stress sensor, an optical fiber grating water pressure sensor and an optical fiber grating anchor rod stress sensor; monitoring spots are deployed in the underground part of the coal mine, and optical fiber grating sensors are installed in the working face safety monitoring subsystem and the tunnel safety monitoring subsystem, so as to monitor the safety parameters of the coal mine 2014289871 09 Feb 2017
Furthermore, the output port of the optical fiber grating static demodulator is connected to the computer data processing system through a network interface or RS232 interface or USB interface.
In addition, the computer data processing system has built-in demodulation, analysis, and processing software, and comprises the following modules: (a) input module, including coal mine parameter input, early-warning and alarm threshold input, and automatic acquisition functions; (b) management module, including history search, data sharing, and automatic storage functions; (c) analysis module, including trend analysis, multi-parameter association analysis, and comparative analysis functions; (d) output module, including out-of-limit alarming, risk forecast, comprehensive report and real-time curve functions.
The optical fiber grating support pressure sensors are deployed on the hydraulic supports at the fully-mechanized mining face, and moves forward as the working face advances, to monitor the working resistance of the hydraulic supports in real time and provide a basis for study of reasonable support-surrounding rock relationship, and design and management of roof control; the optical fiber grating gas sensors are deployed in the fully-mechanized mining face, to monitor the gas concentration at the upper corners of the working face, ensure safety production in the coal mine, and provide support and basis for safety production in coal mines with a high coal and gas outburst risk; 5 the optical fiber grating temperature sensors are deployed in the goaf at the fully-mechanized mining face, to monitor the temperature and temperature change in the goaf in real time, and provide a reliable data basis for preventing fire disaster and coal spontaneous combustion in the goaf. 2014289871 09 Feb 2017
The optical fiber grating drilling stress sensors are deployed in the leading coal mass in the tunnels at both ends of the working face, to monitor the change of supporting pressure appearance in the stress field during the entire process of relatively stable and obvious movement of the roof rock, and provide a basis for making decisions on underground pressure according to the supporting pressure distribution, transfer and change, such as the position and range of peak pressure distribution, and long-term and medium-term forecast of roof weighting; the optical fiber grating separation monitoring sensors are deployed in the tunnel roof rock shored by anchor rods, to monitor the change situation and trend of separation values within and outside of the anchored scope of the roof, and provide a basis for monitoring the stability of the tunnel roof shored by anchor rods and the combined movement status of the overlaying rock; the optical fiber grating wind speed sensors are deployed in the tunnel, to monitor the ventilation volume and ventilation speed in the tunnel in the coal mine. It can be applied in the ventilation and return tunnels, ventilation openings, etc. in coal mines with an underground gas explosion risk, and can continuously monitor the wind speed and air volume at the above-mentioned spots, monitor the wind speed and air volume in the tunnels in real time, to provide a basis for gas extraction in coal mines with high gas concentration and ventilation of foul gas in tunnels.
The optical fiber grating anchor cable stress sensors and the optical fiber grating anchor rod stress sensors are deployed in the tunnel rock, to monitor the magnitude and distribution of axial forces of anchor rods and anchor cables in tunnels shored by anchor rods and anchor cables, provide a reliable theoretical basis for monitoring the stability of tunnel roof, ensure the stability of the surrounding rock of tunnel, and prevent accidents such as massive collapse of the surrounding rock, etc.;
The optical fiber grating water pressure sensors are deployed in the tunnels, to monitor the water inrush in the tunnels, to provide a basis for preventing water bursting accidents in tunnels with a high water inrush risk in coal mines, and it is of great significance for the forecast and prevention of water disasters in coal mines.
The processing steps of the demodulation, analysis, and processing software include: step 1: numbering, classifying, and grouping the optical fiber grating sensors; 6 step 2: setting parameters and thresholds of early-warning and alarm for the optical fiber grating sensors according to the conditions in the coal mine; 2014289871 09 Feb 2017 step 3: demodulating the coal mine safety data monitored by the optical fiber grating sensors in real time via the optical fiber grating static demodulator; comparing the received real-time data obtained by the demodulation, analysis, and processing software with the thresholds of early-warning and alarm; and, sending an incident early-warning or alarm message from the demodulation, analysis, and processing software, and storing the real-time data into a monitoring parameter database at the same time, if the comparison result indicates that a threshold is exceeded; step 4: carrying out trend analysis, multi-parameter association analysis and comparative analysis with the data in the monitoring parameter database; step 5: carrying out the following functional processing, according to the relevant parameters of the tunnel and working face in coal mine and the result of analysis: 1. output comprehensive prediction of underground risk in the coal mine; 2. display the monitoring curves of underground safety parameters in the coal mine in real time; 3. share data information through coal mine LAN; 4. generate comprehensive reports; 5. perform history searches; thus, safety measures can be taken to ensure safe and efficient production in the coal mine.
Beneficial effects of the embodiment: With the technical scheme described above, the present embodiment utilizes various optical fiber grating sensors for coal mine underground safety comprehensive monitoring, employs multiple monitoring stations, carries out underground multi-parameter monitoring with multiple sensors, utilizes optical fibers as transmission carrier and integrates optical fiber grating sensors, attains a good monitoring effect, high measuring accuracy and high reliability, has strong anti-electromagnetic interference capability and low monitoring data error, is less susceptible to environmental influences, and can operate stably; the optical fiber grating sensors are intrinsically safe, all-optical measurement is used across the coal mine and optical fibers are used for signal transmission, without the need for power supply; thus, the system provided in the present embodiment can ensure underground production safety and personal safety of the workers in the coal mine; the system provided in the present embodiment can monitor online in real time continuously in a long term, has a early-warning and alarm function, provides the result of comprehensive coal mine underground monitoring and risk forecast timely, realizes data sharing across the mining area, and facilitates the personnel on the ground surface to learn about the situation of underground operation in the coal mine in the first time, so as to better guide safe 7 production in the coal mine, effectively reduce the occurrence of safety incidents in the coal mine, and realizes safe and efficient production in the coal mine. The optical fiber grating sensor-based coal mine safety comprehensive monitoring system can process the coal mine safety parameters and data comprehensively, effectively prevent and reduce the occurrence of incidents in the coal mine, and realize safe and efficient production in the coal mine. 2014289871 09 Feb 2017
Advantages of the embodiment: The optical fiber grating sensors applied in coal mines have advantages including intrinsic safety, high measuring accuracy, strong anti-interference capability, low monitoring data error, and support for real-time on-line long-term monitoring, etc. The optical fiber grating sensor-based coal mine safety comprehensive monitoring system can process the coal mine safety parameters and data comprehensively, effectively prevent and reduce the occurrence of incidents in the coal mine, and realize safe and efficient production in the coal mine.
Hereunder an exemplary embodiment of the present invention will be further described in more detail with reference to the accompanying drawings.
In the structural schematic diagram of the overall layout of the system shown in Fig. 1, the optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system comprises an aboveground part and an underground part, wherein, the aboveground part comprises an optical fiber grating static demodulator, a computer data processing system, a printer, a server, and clients, the client is interconnected with the server through a coal mine LAN, and the optical fiber grating static demodulator is connected to the underground part through a mining transmission cable; the underground part comprises an optical switch array, a working face safety monitoring subsystem, and a tunnel safety monitoring subsystem; one channel of the optical switch array is connected with the working face safety monitoring subsystem through a communication optical fiber, the working face safety monitoring subsystem at least comprises one working face monitoring base station, wherein, each working face monitoring base station at least comprises one monitoring station, and each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating support pressure sensor, an optical fiber grating gas sensor, an optical fiber grating temperature sensor and an optical fiber grating drilling stress sensor; the other channel of the optical switch array is connected with the tunnel safety monitoring subsystem through a communication optical fiber, and the tunnel safety monitoring subsystem at least comprises one tunnel monitoring base station, wherein, each tunnel monitoring base station at least comprises one monitoring station, and each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating separation monitoring sensor, an optical fiber grating wind speed sensor, an optical fiber grating anchor cable stress sensor, an optical fiber grating water pressure sensor and an optical fiber grating anchor rod stress sensor. 8
Furthermore, the output port of the optical fiber grating static demodulator is connected to the computer data processing system through a network interface or RS232 interface or USB interface. 2014289871 09 Feb 2017
Monitoring spots are deployed in the underground part of the coal mine, according to the occurrence character and physical mechanical property of the coal and rock strata, optical fiber grating sensors are installed in the working face safety monitoring subsystem and the tunnel safety monitoring subsystem, so as to monitor the safety parameters of the coal mine.
In the working face safety monitoring subsystem: the optical fiber grating support pressure sensors are deployed on the hydraulic supports at the fully-mechanized mining face, and moves forward as the working face advances, to monitor the working resistance of the hydraulic supports in real time and provide a basis for study of reasonable support-surrounding rock relationship, and design and management of roof control;
The optical fiber grating gas sensors are deployed in the fully-mechanized mining face, to monitor the gas concentration at the upper corners of the working face, ensure safety production in the coal mine, and provide support and basis for safety production in coal mines with a high coal and gas outburst risk.
The optical fiber grating temperature sensors are deployed in the goaf at the fully-mechanized mining face, to monitor the temperature and temperature change in the goaf in real time, and provide a reliable data basis for preventing fire disaster and coal spontaneous combustion in the goaf.
In the tunnel safety monitoring subsystem: The optical fiber grating drilling stress sensors are deployed in the leading coal mass in the tunnels at both ends of the working face, to monitor the change of supporting pressure appearance in the stress field during the entire process of relatively stable and obvious movement of the roof rock, and provide a basis for making decisions on underground pressure according to the supporting pressure distribution, transfer and change, such as the position and range of peak pressure distribution, and long-term and medium-term forecast of roof weighting;
The optical fiber grating separation monitoring sensors are deployed in the tunnel roof rock shored by anchor rods, to monitor the change situation and trend of separation values within and outside of the anchored scope of the roof, and provide a basis for monitoring the stability of the tunnel roof shored by anchor rods and the combined movement status of the overlaying rock.
The optical fiber grating wind speed sensors are deployed in the tunnel, to monitor the ventilation volume and ventilation speed in the tunnel in the coal mine. It can be applied in the ventilation and 9 return tunnels, ventilation openings, etc. in coal mines with an underground gas explosion risk, and can continuously monitor the wind speed and air volume at the above-mentioned spots, monitor the wind speed and air volume in the tunnels in real time, to provide a basis for gas extraction in coal mines with high gas concentration and ventilation of foul gas in tunnels. 2014289871 09 Feb 2017
The optical fiber grating anchor cable stress sensors and the optical fiber grating anchor rod stress sensors are deployed in the tunnel rock, to monitor the magnitude and distribution of axial forces of anchor rods and anchor cables in tunnels shored by anchor rods and anchor cables, provide a reliable theoretical basis for monitoring the stability of tunnel roof, ensure the stability of the surrounding rock of tunnel, and prevent accidents such as massive collapse of the surrounding rock, etc.
The optical fiber grating water pressure sensors are deployed in the tunnels, to monitor the water inrush in the tunnels, to provide a basis for preventing water bursting accidents in tunnels with a high water inrush risk in coal mines, and it is of great significance for the forecast and prevention of water disasters in coal mines.
Fig. 5 is a flow diagram of the data processing process of the demodulation, analysis, and processing software. The processing process of the demodulation, analysis, and processing software may comprise the following steps: step 1: numbering, classifying, and grouping the optical fiber grating sensors; step 2: setting parameters and thresholds of early-warning and alarm for the optical fiber grating sensors according to the conditions in the coal mine; step 3: demodulating the coal mine safety data monitored by the optical fiber grating sensors in real time via the optical fiber grating static demodulator; comparing the received real-time data obtained by the demodulation, analysis, and processing software with the thresholds of early-warning and alarm; and, sending an incident early-warning or alarm message from the demodulation, analysis, and processing software, and storing the real-time data into a monitoring parameter database at the same time, if the comparison result indicates that a threshold is exceeded; step 4: carrying out trend analysis, multi-parameter association analysis and comparative analysis with the data in the monitoring parameter database; step 5: carrying out the following functional processing, according to the relevant parameters of the tunnel and working face in coal mine and the result of analysis: 1. output comprehensive prediction of underground risk in the coal mine; 2. display the monitoring 10 curves of underground safety parameters in the coal mine in real time; 3. share data information through coal mine LAN; 4. generate comprehensive reports; 5. perform history searches; thus, safety measures can be taken to ensure safe and efficient production in the coal mine. 2014289871 09 Feb 2017
With the technical scheme described above, the system can carry out multi-parameter monitoring with multiple monitoring stations, integrates optical fiber grating sensors, utilizes optical fibers as the transmission carrier, has strong anti-electromagnetic interference capability, is less susceptible to the environmental influence, can operate stably, realizes real-time continuous long-term on-line monitoring, and has a early-warning and alarm function; thus, the system can provide the result of comprehensive coal mine underground monitoring and risk forecast timely, realizes data sharing across the mining area, and enables the coal mine leaders to learn about the situation of underground operation in the coal mine in the first time, so as to taken safety measures, better guide the safe production in the coal mine, and thereby realize safe and efficient production in the coal mine.
In the present specification, terms such as “component”, “apparatus”, “means”, “device” and “member” may refer to singular or plural items and are terms intended to refer to a set of properties, functions or characteristics performed by one or more items having one or more parts. It is envisaged that where a “component”, “apparatus”, “means”, “device” or “membef ’ or similar term is described as being a unitary object, then a functionally equivalent object having multiple components is considered to fall within the scope of the term, and similarly, where a “component”, “apparatus”, “assembly”, “means”, “device” or “member” is described as having multiple items, a functionally equivalent but unitary object is also considered to fall within the scope of the term, unless the contrary is expressly stated or the context requires otherwise.
Throughout the specification and claims the word “comprise” and its derivatives are intended to have an inclusive rather than exclusive meaning unless the contrary is expressly stated or the context requires otherwise. That is, the word “comprise” and its derivatives will be taken to indicate the inclusion of not only the listed components, steps or features that it directly references, but also other components, steps or features not specifically listed, unless the contrary is expressly stated or the context requires otherwise. 11
It will be appreciated by those skilled in the art that many modifications and variations may be made to the embodiments described herein without departing from the spirit and scope of the invention as defined in the appended claims. 2014289871 09 Feb 2017 12
Claims (2)
1. An optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system, wherein, it comprises an aboveground part and an underground part, the aboveground part comprises an optical fiber grating static demodulator, a computer data processing system, a printer, a server, and clients, the client is interconnected with the server through a coal mine LAN, and the optical fiber grating static demodulator is connected to the underground part through a mining transmission cable; the underground part comprises an optical switch array, a working face safety monitoring subsystem, and a tunnel safety monitoring subsystem; one channel of the optical switch array is connected with the working face safety monitoring subsystem through a communication optical fiber, the working face safety monitoring subsystem at least comprises one working face monitoring base station, wherein, each working face monitoring base station at least comprises one monitoring station, and each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating support pressure sensor, an optical fiber grating gas sensor and an optical fiber grating temperature sensor; the other channel of the optical switch array is connected with the tunnel safety monitoring subsystem through a communication optical fiber, and the tunnel safety monitoring subsystem at least comprises one tunnel monitoring base station, wherein, each tunnel monitoring base station at least comprises one monitoring station, and each monitoring station corresponds to a set of optical fiber grating sensors, which includes an optical fiber grating drilling stress sensor, an optical fiber grating separation monitoring sensor, an optical fiber grating wind speed sensor, an optical fiber grating anchor cable stress sensor, an optical fiber grating water pressure sensor and an optical fiber grating anchor rod stress sensor; monitoring spots are deployed in the underground part of the coal mine, and optical fiber grating sensors are installed in the working face safety monitoring subsystem and the tunnel safety monitoring subsystem, so as to monitor the safety parameters of the coal mine, the output port of the optical fiber grating static demodulator is connected to the computer data processing system through a network interface or RS232 interface or USB interface, the computer data processing system has built-in demodulation, analysis, and processing software, and comprises the following modules: (a) input module, including coal mine parameter input, early-warning and alarm threshold input, and automatic acquisition functions; (b) management module, including history search, data sharing, and automatic storage functions; (c) analysis module, including trend analysis, multi-parameter association analysis, and comparative analysis functions; (d) output module, including out-of-limit alarming, risk forecasting, comprehensive reporting, and real-time curve functions.
2. The optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system according to claim 1, wherein, the processing steps of the demodulation, analysis, and processing software include: step 1: numbering, classifying, and grouping the optical fiber grating sensors; step 2: setting parameters and thresholds of early-warning and alarm for the optical fiber grating sensors according to the conditions in the coal mine; step 3: demodulating the coal mine safety data monitored by the optical fiber grating sensors in real time via the optical fiber grating static demodulator; comparing the received real-time data obtained by the demodulation, analysis, and processing software with the thresholds of early-warning and alarm; and, sending an incident early-warning or alarm message from the demodulation, analysis, and processing software, and storing the real-time data into a monitoring parameter database at the same time, if the comparison result indicates that a threshold is exceeded; step 4: carrying out trend analysis, multi-parameter association analysis and comparative analysis with the data in the monitoring parameter database; step 5: carrying out the following functional processing, according to the relevant parameters of the tunnel and working face in coal mine and the result of analysis: 1. output comprehensive prediction of underground risk in the coal mine; 2. display the monitoring curves of underground safety parameters in the coal mine in real time; 3. share data information through coal mine LAN; 4. generate comprehensive reports; 5. perform history searches; thus, safety measures can be taken to ensure safe and efficient production in the coal mine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310282744.2 | 2013-07-08 | ||
| CN201310282744.2A CN103362553B (en) | 2013-07-08 | 2013-07-08 | Coal Mine Underground Safety Comprehensive Monitoring System Based on Fiber Bragg Grating Sensor |
| PCT/CN2014/071569 WO2015003488A1 (en) | 2013-07-08 | 2014-01-27 | Optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system |
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| AU2014289871A1 AU2014289871A1 (en) | 2016-02-25 |
| AU2014289871B2 true AU2014289871B2 (en) | 2017-03-23 |
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| CN (1) | CN103362553B (en) |
| AU (1) | AU2014289871B2 (en) |
| RU (1) | RU2623392C1 (en) |
| WO (1) | WO2015003488A1 (en) |
| ZA (1) | ZA201600831B (en) |
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| CN103362553B (en) | 2015-06-10 |
| ZA201600831B (en) | 2017-03-29 |
| CN103362553A (en) | 2013-10-23 |
| RU2623392C1 (en) | 2017-06-26 |
| WO2015003488A1 (en) | 2015-01-15 |
| AU2014289871A1 (en) | 2016-02-25 |
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