CN103527248B - Based on coal mine roof plate water barrier Stability Monitoring System and the method for fiber grating - Google Patents

Based on coal mine roof plate water barrier Stability Monitoring System and the method for fiber grating Download PDF

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CN103527248B
CN103527248B CN201310509323.9A CN201310509323A CN103527248B CN 103527248 B CN103527248 B CN 103527248B CN 201310509323 A CN201310509323 A CN 201310509323A CN 103527248 B CN103527248 B CN 103527248B
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fiber
optical fiber
water barrier
monitoring
grating
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CN103527248A (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

A kind of coal mine roof plate water barrier Stability Monitoring System based on fiber grating, this monitoring system is at working face extraction roadway layout survey station, vertical top plate drilling is bored to water barrier at working face extraction back, fiber bragg grating pressure sensor is arranged in drill tip, at the drillhole height place installing fiber grating roof separation indicator below water barrier and its between rock stratum, the outside that fiber connector draws boring is connected thus incoming fiber optic shunt with optical fiber pigtail, optical fiber terminal box is connected to by communication optical fiber, the optical fibre interrogation instrument of ground level control room is connected to by optical fiber cable for mine, after demodulation, Signal transmissions is to monitoring server, by monitoring server, signal is processed, by mine LAN, data processed result is shared on client, by the stability state of computer display Real-Time Monitoring water barrier, when suffered stress bears the upper limit close to water barrier and absciss layer appears in water barrier and the overlying rock below it, carry out early warning in time.

Description

Based on coal mine roof plate water barrier Stability Monitoring System and the method for 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 based on fiber grating and method.
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, adopt the motion of overlying rock caused, cause water barrier unstability, cause descending water resource utility model in large quantities, the heavy damage ecological environment in mining area.To this, Chinese scholar has carried out a large amount of research practices, proposes the water-retaining production realizing sustainable development, namely guarantees the stability of water barrier in mining active process, and water body above exploiting field is not run off.
At present, to the method that the monitoring of water barrier stability is not still shaped, the success or not of water-retaining production, predicted by goaf top plate water leakage degree, error is large, and can not react the stability of water barrier in time, misses the opportunity taking measures to ensure water barrier stability.
Summary of the invention
Technical problem: in order to overcome deficiency of the prior art, the invention provides that a kind of monitor and feedback is little, the coal mine roof plate water barrier stability on-line monitoring system based on optical fiber grating sensing that can react water barrier stability in time and method.
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 fibre interrogation instrument, 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; At working face extraction roadway layout monitoring survey station, described monitoring survey station comprises fiber bragg grating pressure sensor and fiber grating roof separation indicator; Fiber bragg grating pressure sensor is arranged on top plate drilling top, 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 the outside of holing and is connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, optical fiber terminal box is connected to by communication optical fiber, be connected to the optical fibre interrogation instrument of ground level control room by optical fiber cable for mine to optical fiber terminal box, optical fibre interrogation instrument is connected with monitoring server, and monitoring server has computer display.
Described monitoring server is embedded with data receiver, data processing, the display of result real-time pictures, list display, data storage, the inquiry of historical data, critical stress value warning module; 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, a layout monitoring survey station is installed, 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, arrange fiber bragg grating pressure sensor in drill tip, at the drillhole height place below water barrier and its between rock stratum, installing fiber grating roof separation indicator;
(3) fiber bragg grating pressure sensor and the fiber connector of fiber grating roof separation indicator drawn the outside of holing and be connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, optical fiber terminal box is connected to by communication optical fiber, the optical fibre interrogation instrument of ground level control room is connected to by optical fiber cable for mine, optical signal is passed to ground optical fiber (FBG) demodulator, after demodulation, Signal transmissions is to monitoring server, by monitoring server, signal is processed, by mine LAN, data processed result is shared on client, by the stability state of computer display Real-Time Monitoring water barrier, when suffered stress bears the upper limit close to water barrier and absciss layer appears in water barrier and the overlying rock below it, carry out early warning in time.
Beneficial effect, owing to have employed such scheme, the measurement result that the optical fiber optical grating stress of water barrier measures situation and fiber grating separation indicator is connected to optical fiber terminal box by optical fiber pigtail, then the optical fibre interrogation instrument of ground level control room is connected to optical fiber cable for mine, then optical signal is sent data to client by monitoring server, realize the STABILITY MONITORING to back water barrier, ensure the safe working of mine, reach green, the object of water-retaining production, solve large to the monitor and feedback of water barrier stability at present, the problem of water barrier stability can not be reacted in time.
Water-resisting roof layer will the decision method of unstability be stress suffered by water barrier close to or exceed water barrier and to meet with stresses the upper limit and absciss layer appears in water barrier and the overlying rock below it; This fiber grating monitoring system has real-time, the stable case of water-resisting roof layer can be reflected in time, if water barrier is by unstability, the supporting scheme in work plane and goaf will be adjusted in time, ensure the stability of water barrier, reach object that is green, water-retaining production; The monitoring result of this monitoring system realizes multiple terminals Real-Time Monitoring by LAN.
The present invention has the following advantages:
1, method system, comprehensively, be convenient to realize, equipment is installed simple, long service life, is suitable for popularity application;
2, down-hole does not need power supply, there is not the signal of telecommunication and electronic device, ensure that site safety;
3, adopt full photo measure and Optical Fiber Transmission, effectively can avoid the impact of electromagnetic interference under complicated adverse circumstances;
4, water barrier STABILITY MONITORING result can be provided timely and accurately, 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, ground level control room; 2, console; 3, computer display; 4, optical fibre interrogation instrument; 5, monitoring server; 6, mine LAN; 7, colliery section office terminal; 8, optical fiber cable for mine; 9, survey station is monitored; 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.
Detailed description of the invention
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 fibre interrogation instrument 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; At working face extraction roadway layout monitoring survey station 9, described monitoring survey station 9 comprises fiber bragg grating pressure sensor 10 and fiber grating roof separation indicator 11; Fiber bragg grating pressure sensor 10 is arranged on top plate drilling 12 top, at top plate drilling 12 At The Height, 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 the outside of holing and is connected with optical fiber pigtail 14, optical fiber pigtail 14 incoming fiber optic shunt 17, optical fiber terminal box 15 is connected to by communication optical fiber 16, be connected to the optical fibre interrogation instrument 4 of ground level control room 1 by optical fiber cable for mine 8 to optical fiber terminal box 15, optical fibre interrogation instrument 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, the display of result real-time pictures, list display, data storage, the inquiry of historical data, critical stress value warning module; 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, a layout monitoring survey station 9 is installed, after the back production of coal-face, the stability of monitoring goaf 18 water barrier 20;
(2), vertical top plate drilling 12 to water barrier 20 is bored at working face extraction back, fiber bragg grating pressure sensor 10 is arranged on boring 12 top, at boring 12 At The Height below water barrier and its between rock stratum, 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 the outside of holing and be connected with optical fiber pigtail 4, optical fiber pigtail 4 incoming fiber optic shunt 17, optical fiber terminal box 15 is connected to by communication optical fiber 16, the optical fibre interrogation instrument 4 of ground level control room 1 is connected to by optical fiber cable for mine 8, optical signal is passed to ground optical fiber (FBG) demodulator 4, after demodulation, Signal transmissions is to monitoring server 5, processed by monitoring server 5 pairs of signals, by mine LAN 6, data processed result is shared on client, by the stability state of computer display 3 Real-Time Monitoring water barrier 20, when suffered stress bears the upper limit close to water barrier 20 and water barrier 20 occurs absciss layer with the overlying rock 19 below it, carry out early warning in time.
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 is linked together by optical fiber splicer welding.
Described monitoring server is embedded with data receiver, data processing, the display of result real-time pictures, list display, data storage, the inquiry of historical data, critical stress value warning module; The software systems of the embedded water barrier STABILITY MONITORING based on optical fiber grating sensing of this system simultaneously.
Water-resisting roof layer will the decision method of unstability be stress suffered by water barrier 20 close to or exceed water barrier and to meet with stresses the upper limit and water barrier 20 occurs absciss layer with the overlying rock 19 below it; This fiber grating monitoring system has real-time, the stable case of water-resisting roof layer can be reflected in time, if water barrier is by unstability, the supporting scheme in work plane and goaf will be adjusted in time, ensure the stability of water barrier, reach object that is green, water-retaining production; The monitoring result of this monitoring system realizes multiple terminals Real-Time Monitoring by LAN.

Claims (3)

1., based on a coal mine roof plate water barrier stability on-line monitoring system for fiber grating, it is characterized in that: on-line monitoring system comprises optical fibre interrogation instrument, 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; At working face extraction roadway layout monitoring survey station, described monitoring survey station comprises fiber bragg grating pressure sensor and fiber grating roof separation indicator; Fiber bragg grating pressure sensor is arranged on top plate drilling top, at top plate drilling place, installing fiber grating roof separation indicator; Fiber bragg grating pressure sensor and the fiber connector of fiber grating roof separation indicator are drawn the outside of holing and is connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, optical fiber terminal box is connected to by communication optical fiber, optical fiber terminal box is connected to the optical fibre interrogation instrument of ground level control room by optical fiber cable for mine, optical fibre interrogation instrument is connected with monitoring server, and monitoring server has computer display.
2. a kind of coal mine roof plate water barrier stability on-line 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, the display of result real-time pictures, list display, data storage, the inquiry of historical data, critical stress value warning module; 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 on-line monitoring system based on fiber grating according to claim 1, is further characterized in that: the method step of monitoring system is as follows:
(1) in working face extraction tunnel, every 50m, a monitoring survey station is installed, after the back production of coal-face, the stability of monitoring goaf water barrier;
(2) bore vertical top plate drilling to water barrier at working face extraction back, arrange fiber bragg grating pressure sensor in drill tip, in the drill hole below water barrier and its between rock stratum, installing fiber grating roof separation indicator;
(3) fiber bragg grating pressure sensor and the fiber connector of fiber grating roof separation indicator drawn the outside of holing and be connected with optical fiber pigtail, optical fiber pigtail incoming fiber optic shunt, optical fiber terminal box is connected to by communication optical fiber, the optical fibre interrogation instrument of ground level control room is connected to by optical fiber cable for mine, optical signal is passed to ground optical fiber (FBG) demodulator, after demodulation, Signal transmissions is to monitoring server, by monitoring server, signal is processed, by mine LAN, data processed result is shared on client, by the stability state of computer display Real-Time Monitoring water barrier, when suffered stress bears the upper limit close to water barrier and absciss layer appears in water barrier and the overlying rock below it, carry out early warning in time.
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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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
CN109813486B (en) * 2019-02-14 2020-05-01 中国矿业大学 Off-bed hydrodynamic water pressure monitoring device when off-bed upper rock stratum is broken
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
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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