CN103527248A - Coal mine top plate aquiclude stability monitoring system based on fiber Bragg grating and monitoring method - Google Patents

Coal mine top plate aquiclude stability monitoring system based on fiber Bragg grating and monitoring method Download PDF

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Publication number
CN103527248A
CN103527248A CN201310509323.9A CN201310509323A CN103527248A CN 103527248 A CN103527248 A CN 103527248A CN 201310509323 A CN201310509323 A CN 201310509323A CN 103527248 A CN103527248 A CN 103527248A
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China
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optical fiber
fiber
monitoring
water barrier
bragg grating
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CN201310509323.9A
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CN103527248B (en
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方新秋
樊海亮
梁敏富
刘晓宁
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

Disclosed is a coal mine top plate aquiclude stability monitoring system based on a fiber Bragg grating. A measurement station is arranged on a work surface mining roadway, a vertical top plate drilling hole is drilled in a top plate of the work surface mining roadway to an aquiclude, a fiber Bragg grating pressure sensor is arranged at the top end of the drilling hole, a fiber Bragg grating top plate bed separation instrument is installed at the height position of the drilling hole between the aquiclude and a rock stratum below, and an optical fiber connector is led out of the drilling hole and connected with an optical fiber tail fiber, thereby being connected with an optical fiber splitter. The optical fiber connector is connected with an optical fiber terminal box through a communication optical fiber and connected to an optical fiber interrogator of a ground control chamber through a mining optical cable, signals are transmitted to a monitoring server after demodulation and are processed through the monitoring server, and the data processing result is shared with a client side through a mine local area network. The stability conditions of the aquiclude are monitored in real time through a computer display, and an alarm is given timely when the stress is near the bearing upper limit of the aquiclude and separation occurs between the aquiclude and the overlying strata blow.

Description

Coal mine roof plate water barrier Stability Monitoring System and method based on fiber grating
Technical field
The present invention relates to a kind of coal mine roof plate water barrier Stability Monitoring System and method, specifically a kind of coal mine roof plate water barrier Stability Monitoring System and method based on fiber grating.
Background technology
China's coal-mine is distributed in the north and the Northwest of lack of water more, many mine water resource shortage.Mining Practice proves, adopts the motion of the overlying rock causing, and causes water barrier unstability, causes a large amount of groundwater resources to run off, heavy damage the ecological environment in mining area.To this, Chinese scholar has been carried out a large amount of research practices, has proposed to realize the water-retaining production of sustainable development, guarantees the stability of water barrier in mining active process, and top, exploiting field water body is not run off.
At present, the monitoring of water barrier stability still be there is no to the method for shaping, the success or not of water-retaining production, by the goaf top plate degree of leaking, predict, error is large, and can not react in time the stability of water barrier, has missed the opportunity of taking measures to guarantee water barrier stability.
Summary of the invention
Technical problem: in order to overcome deficiency of the prior art, the invention provides a kind of coal mine roof plate water barrier stability on-line monitoring system and method based on optical fiber grating sensing that error is little, can react in time water barrier stability of monitoring.
Technical scheme: the present invention is achieved through the following technical solutions: a kind of coal mine roof plate water barrier Stability Monitoring System based on fiber grating, comprises optical fiber (FBG) demodulator, monitoring server, optical fiber cable for mine, fiber bragg grating pressure sensor, fiber grating roof separation indicator, optical fiber pigtail, optical fiber terminal box, communication optical fiber, optical fiber splitter; In working face extraction tunnel, arrange monitoring survey station, described monitoring survey station comprises fiber bragg grating pressure sensor and fiber grating roof separation indicator; On top plate drilling top, arrange fiber bragg grating pressure sensor, at top plate drilling At The Height, installing fiber grating roof separation indicator; Fiber bragg grating pressure sensor and the fiber connector of fiber grating roof separation indicator are drawn to the outside of boring and be connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, by communication optical fiber, be connected to optical fiber terminal box, to optical fiber terminal box, by optical fiber cable for mine, be connected to the optical fiber (FBG) demodulator in control room, ground, optical fiber (FBG) demodulator is connected with monitoring server, and monitoring server has computer display.
Described monitoring server is embedded with data receiver, data processing, picture disply, list demonstration, data storage, the inquiry of historical data, critical stress value warning module during fructufy; The software systems of the embedded water barrier STABILITY MONITORING based on optical fiber grating sensing of this system simultaneously.
The method step of monitoring system is as follows:
(1), in working face extraction tunnel, every 50m, install one and arrange monitoring survey station, after the back production of coal-face, the stability of monitoring goaf water barrier;
(2), at working face extraction back, bore vertical top plate drilling to water barrier, in drill tip, arrange fiber bragg grating pressure sensor, at water barrier and the drillhole height place between rock stratum below it, install fiber grating roof separation indicator;
(3) fiber bragg grating pressure sensor and the fiber connector of fiber grating roof separation indicator drawn to the outside of boring and be connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, by communication optical fiber, be connected to optical fiber terminal box, by optical fiber cable for mine, be connected to the optical fiber (FBG) demodulator in control room, ground, optical signal is passed to ground optical fiber (FBG) demodulator, after demodulation, signal transfers to monitoring server, by monitoring server, signal is processed, by mine LAN, data processed result is shared on to client, by the stability state of computer display Real-Time Monitoring water barrier, when suffered stress approaches overlying rock that water barrier bears the upper limit and water barrier and its below and occurs absciss layer, carry out in time early warning.
Beneficial effect, owing to having adopted such scheme, the measurement result of the optical fiber optical grating stress of water barrier being measured to situation and fiber grating separation indicator is connected to optical fiber terminal box by optical fiber pigtail, then with optical fiber cable for mine, be connected to the optical fiber (FBG) demodulator in control room, ground, then optical signal is sent data to client by monitoring server, the STABILITY MONITORING of realization to back water barrier, guarantee the safe working of mine, reach green, the object of water-retaining production, solved at present large to the monitoring error of water barrier stability, can not react in time the problem of water barrier stability.
Top board water barrier will unstability decision method be that the suffered stress of water barrier approaches or surpasses the meet with stresses upper limit and water barrier of water barrier and occurs absciss layer with the overlying rock below it; This fiber grating monitoring system has real-time, the stable case that can reflect in time top board water barrier, if water barrier is about to unstability, will adjust the supporting scheme in work plane and goaf in time, guarantee the stability of water barrier, reach object green, water-retaining production; The monitoring result of this monitoring system can realize multiple terminals Real-Time Monitoring by LAN.
The present invention has the following advantages:
1, method system, comprehensive, is convenient to realize, and equipment is installed simple, and long service life, is suitable for generally applying;
2, down-hole does not need power supply, does not have the signal of telecommunication and electronic device, has guaranteed site safety;
3, adopt full photo measure and Optical Fiber Transmission, can effectively avoid the impact of electromagnetic interference under complicated adverse circumstances;
4, can provide timely and accurately water barrier STABILITY MONITORING result, be beneficial to guide field work.
Accompanying drawing explanation
Fig. 1 is monitoring system integral arrangement schematic diagram of the present invention.
In figure, 1, control room, ground; 2, console; 3, computer display; 4, optical fiber (FBG) demodulator; 5, monitoring server; 6, mine LAN; 7, colliery section office terminal; 8, optical fiber cable for mine; 9, monitoring survey station; 10, fiber bragg grating pressure sensor; 11, fiber grating roof separation indicator; 12, top plate drilling; 13, boring encapsulation cementing agent; 14, optical fiber pigtail; 15, optical fiber terminal box; 16, communication optical fiber; 17, optical fiber splitter; 18, goaf; 19, overlying rock; 20, water barrier; 21, aquifer.
The specific embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Embodiment 1: a kind of coal mine roof plate water barrier stability on-line monitoring system based on optical fiber grating sensing, comprises optical fiber (FBG) demodulator 4, monitoring server 5, optical fiber cable for mine 8, fiber bragg grating pressure sensor 10, fiber grating roof separation indicator 11, optical fiber pigtail 14, optical fiber terminal box 15, communication optical fiber 16, optical fiber splitter 17; In working face extraction tunnel, arrange monitoring survey station 9, described monitoring survey station 9 comprises fiber bragg grating pressure sensor 10 and fiber grating roof separation indicator 11; On top plate drilling 12 tops, arrange fiber bragg grating pressure sensor 10, at top plate drilling 12 At The Heights, installing fiber grating roof separation indicator 11; Fiber bragg grating pressure sensor 10 and the fiber connector of fiber grating roof separation indicator 11 are drawn to the outside of boring and be connected with optical fiber pigtail 14, optical fiber pigtail 14 incoming fiber optic shunts 17, by communication optical fiber 16, be connected to optical fiber terminal box 15, to optical fiber terminal box 15, by optical fiber cable for mine 8, be connected to the optical fiber (FBG) demodulator 4 in control room, ground 1, optical fiber (FBG) demodulator 4 is connected with monitoring server 5, and monitoring server 5 has computer display 3.
Described monitoring server is embedded with data receiver, data processing, picture disply, list demonstration, data storage, the inquiry of historical data, critical stress value warning module during fructufy; The software systems of the embedded water barrier STABILITY MONITORING based on optical fiber grating sensing of this system simultaneously.
The method step of monitoring system is as follows:
(1), in working face extraction tunnel, every 50m, install one and arrange monitoring survey station 9, after the back production of coal-face, the stability of monitoring goaf 18 water barriers 20;
(2), at working face extraction back, bore vertical top plate drilling 12 to water barrier 20, on boring 12 tops, arrange fiber bragg grating pressure sensor 10, at water barrier and 12 At The Heights of the boring between rock stratum below it, installing fiber grating roof separation indicator 11;
(3) fiber bragg grating pressure sensor 10 and the fiber connector of fiber grating roof separation indicator 11 drawn to the outside of boring and be connected with optical fiber pigtail 4, optical fiber pigtail 4 incoming fiber optic shunts 17, by communication optical fiber 16, be connected to optical fiber terminal box 15, by optical fiber cable for mine 8, be connected to the optical fiber (FBG) demodulator 4 in control room, ground 1, optical signal is passed to ground optical fiber (FBG) demodulator 4, after demodulation, signal transfers to monitoring server 5, by 5 pairs of signals of monitoring server, process, by mine LAN 6, data processed result is shared on to client, by the stability state of computer display 3 Real-Time Monitoring water barriers 20, when suffered stress approaches overlying rock 19 that water barrier 20 bears the upper limit and water barrier 20 and its below and occurs absciss layer, carry out in time early warning.
The connected mode that described fiber bragg grating pressure sensor 10, light grating roof separation indicator 11 and communication optical fiber 7 are cascaded is that optical fiber pigtail 8 links together by optical fiber splicer welding.
Described monitoring server is embedded with data receiver, data processing, picture disply, list demonstration, data storage, the inquiry of historical data, critical stress value warning module during fructufy; The software systems of the embedded water barrier STABILITY MONITORING based on optical fiber grating sensing of this system simultaneously.
Top board water barrier will unstability decision method be that the suffered stress of water barrier 20 approaches or surpasses the meet with stresses upper limit and water barrier 20 of water barrier and occurs absciss layer with the overlying rock 19 of its below; This fiber grating monitoring system has real-time, the stable case that can reflect in time top board water barrier, if water barrier is about to unstability, will adjust the supporting scheme in work plane and goaf in time, guarantee the stability of water barrier, reach object green, water-retaining production; The monitoring result of this monitoring system can realize multiple terminals Real-Time Monitoring by LAN.

Claims (3)

1. the coal mine roof plate water barrier Stability Monitoring System based on fiber grating, is characterized in that: on-line monitoring system comprises optical fiber (FBG) demodulator, monitoring server, optical fiber cable for mine, fiber bragg grating pressure sensor, fiber grating roof separation indicator, optical fiber pigtail, optical fiber terminal box, communication optical fiber, optical fiber splitter; In working face extraction tunnel, arrange monitoring survey station, described monitoring survey station comprises fiber bragg grating pressure sensor and fiber grating roof separation indicator; On top plate drilling top, arrange fiber bragg grating pressure sensor, at top plate drilling At The Height, installing fiber grating roof separation indicator; Fiber bragg grating pressure sensor and the fiber connector of fiber grating roof separation indicator are drawn to the outside of boring and be connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, by communication optical fiber, be connected to optical fiber terminal box, to optical fiber terminal box, by optical fiber cable for mine, be connected to the optical fiber (FBG) demodulator in control room, ground, optical fiber (FBG) demodulator is connected with monitoring server, and monitoring server has computer display.
2. a kind of coal mine roof plate water barrier Stability Monitoring System based on fiber grating according to claim 1, it is characterized in that: described monitoring server is embedded with data receiver, data processing picture disply, list demonstration, data storage, the inquiry of historical data, critical stress value warning module during fructufy; The software systems of the embedded water barrier STABILITY MONITORING based on optical fiber grating sensing of this system simultaneously.
3. the method for a kind of coal mine roof plate water barrier Stability Monitoring System based on fiber grating claimed in claim 1, is further characterized in that: the method step of monitoring system is as follows:
(1), in working face extraction tunnel, every 50m, install one and arrange monitoring survey station, after the back production of coal-face, the stability of monitoring goaf water barrier;
(2), at working face extraction back, bore vertical top plate drilling to water barrier, in drill tip, arrange fiber bragg grating pressure sensor, at water barrier and the drillhole height place between rock stratum below it, install fiber grating roof separation indicator;
(3) fiber bragg grating pressure sensor and the fiber connector of fiber grating roof separation indicator drawn to the outside of boring and be connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, by communication optical fiber, be connected to optical fiber terminal box, by optical fiber cable for mine, be connected to the optical fiber (FBG) demodulator in control room, ground, optical signal is passed to ground optical fiber (FBG) demodulator, after demodulation, signal transfers to monitoring server, by monitoring server, signal is processed, by mine LAN, data processed result is shared on to client, by the stability state of computer display Real-Time Monitoring water barrier, when suffered stress approaches overlying rock that water barrier bears the upper limit and water barrier and its below and occurs absciss layer, carry out in time early warning.
CN201310509323.9A 2013-10-25 2013-10-25 Based on coal mine roof plate water barrier Stability Monitoring System and the method for fiber grating Active CN103527248B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743357A (en) * 2014-01-24 2014-04-23 西安科技大学 Fiber bragg grating separation layer device for monitoring deformation of rock roof
CN104236605A (en) * 2014-10-11 2014-12-24 上海海事大学 Coal mine fiber brag grating system for reducing accident rate
CN109060168A (en) * 2018-08-15 2018-12-21 谢国民 A kind of spontaneous fire in coal mine monitoring device based on fiber-optic grating sensor
CN109813486A (en) * 2019-02-14 2019-05-28 中国矿业大学 Absciss layer hydrodynamic(al) water pressure monitoring device when a kind of upper rock stratum fracture of absciss layer
CN109884055A (en) * 2019-03-04 2019-06-14 山东科技大学 Stope overlying strata separation layer monitoring method based on optical fiber
CN110763380A (en) * 2019-10-30 2020-02-07 煤炭科学技术研究院有限公司 One-hole multi-point type stress and displacement monitoring system based on fiber bragg grating measurement
CN112253256A (en) * 2020-11-26 2021-01-22 安徽省煤田地质局勘查研究院 Mine ground drilling non-sleeve multi-aquifer underground water level monitoring system

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EP0066418A2 (en) * 1981-05-28 1982-12-08 BHR Electronic Systems Limited Sound operated start circuit
GB2109560A (en) * 1981-09-26 1983-06-02 Hill J And R Fluid flow alarm device
CN1828220A (en) * 2006-03-09 2006-09-06 安里千 Bed separation displacement monitor
CN102866434A (en) * 2012-10-08 2013-01-09 中国矿业大学 Method and system for monitoring water burst of mine in real time

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Publication number Priority date Publication date Assignee Title
EP0066418A2 (en) * 1981-05-28 1982-12-08 BHR Electronic Systems Limited Sound operated start circuit
GB2109560A (en) * 1981-09-26 1983-06-02 Hill J And R Fluid flow alarm device
CN1828220A (en) * 2006-03-09 2006-09-06 安里千 Bed separation displacement monitor
CN102866434A (en) * 2012-10-08 2013-01-09 中国矿业大学 Method and system for monitoring water burst of mine in real time

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743357A (en) * 2014-01-24 2014-04-23 西安科技大学 Fiber bragg grating separation layer device for monitoring deformation of rock roof
CN104236605A (en) * 2014-10-11 2014-12-24 上海海事大学 Coal mine fiber brag grating system for reducing accident rate
CN104236605B (en) * 2014-10-11 2016-08-17 上海海事大学 For reducing the colliery fiber grating system in accident rate
CN109060168A (en) * 2018-08-15 2018-12-21 谢国民 A kind of spontaneous fire in coal mine monitoring device based on fiber-optic grating sensor
CN109813486A (en) * 2019-02-14 2019-05-28 中国矿业大学 Absciss layer hydrodynamic(al) water pressure monitoring device when a kind of upper rock stratum fracture of absciss layer
CN109884055A (en) * 2019-03-04 2019-06-14 山东科技大学 Stope overlying strata separation layer monitoring method based on optical fiber
CN109884055B (en) * 2019-03-04 2019-10-11 山东科技大学 Stope overlying strata separation layer monitoring method based on optical fiber
CN110763380A (en) * 2019-10-30 2020-02-07 煤炭科学技术研究院有限公司 One-hole multi-point type stress and displacement monitoring system based on fiber bragg grating measurement
CN112253256A (en) * 2020-11-26 2021-01-22 安徽省煤田地质局勘查研究院 Mine ground drilling non-sleeve multi-aquifer underground water level monitoring system

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