WO2015058487A1 - 基于光纤光栅的巷道顶板离层动态监测系统及预警方法 - Google Patents
基于光纤光栅的巷道顶板离层动态监测系统及预警方法 Download PDFInfo
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- WO2015058487A1 WO2015058487A1 PCT/CN2014/074081 CN2014074081W WO2015058487A1 WO 2015058487 A1 WO2015058487 A1 WO 2015058487A1 CN 2014074081 W CN2014074081 W CN 2014074081W WO 2015058487 A1 WO2015058487 A1 WO 2015058487A1
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- Prior art keywords
- roof
- fiber grating
- ground
- monitoring
- fiber
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Classifications
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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
Definitions
- the invention relates to a roadway roof separation monitoring system and an early warning method, in particular to a fiber grating-based roadway roof separation dynamic monitoring system and an early warning method.
- the surrounding rock of the roadway will be separated from the layer due to the tensile and shear failure of the external force. Especially the bolt support roadway is more likely to cause the roof to be separated.
- the roof separation layer is one of the main forms of deformation and destruction of the surrounding rock of the roadway. When the roof is separated from the layer by a certain range, it indicates that the roof is in an unstable state. If the support measures are not taken in time, a roof accident such as roof collapse will occur directly. It is related to the personal safety of coal miners and the smooth progress of coal mine production.
- the roof separation layer needs to be monitored at any time in order to understand the rationality of the bolt support parameter setting, the stability of the roof and the development of the fracture position of the overburden on the roof of the roadway. Thereby effectively preventing the occurrence of roof collapse accidents and ensuring safe production of coal mines.
- the roof separation monitoring devices commonly used in coal mines in China are mostly mechanical roadway roof separation indicator and roadway roof separation indicator with sound and light alarm by electrical components.
- the existing roof separation monitoring system is based on Zigbee.
- the coal mine roof dynamic monitoring system and the M-BUS bus-based roof separation monitoring system with CAN bus technology although these methods play an active role in preventing the roof from falling, the above monitoring methods still have the following disadvantages:
- the monitoring devices are all artificial.
- the object of the present invention is to adapt to the safe and efficient production of coal mines now, to meet the safety requirements of coal mines, to provide an intrinsic safety, strong anti-electromagnetic interference capability, small environmental impact, and reliability.
- High-performance, high-precision measurement capable of timely warning and alarming on the off-board data of the roof, automatic monitoring and real-time online dynamic continuous monitoring.
- a fiber grating-based dynamic monitoring system for roadway roof separation including ground data processing and control subsystem, underground data transmission communication subsystem, downhole sensing
- the data acquisition subsystem consists of three parts; the ground data processing and subsystem are placed in the ground control center, and the ground data processing and subsystem consists of the ground main monitoring computer, the fiber grating demodulation device and the power supply.
- the power supply is the ground.
- the upper main monitoring computer and the fiber grating demodulation device provide a rated power supply;
- the downhole transmission communication subsystem is composed of a mining transmission fiber and a fiber junction box, wherein the series transmission fiber is connected in series with a series of fiber junction boxes;
- the downhole sensing data acquisition subsystem includes at least one fiber grating top plate separation monitoring The device, the fiber grating top plate separation layer monitoring device is connected to the fiber optic junction box through the fiber pigtail fiber; the fiber grating top plate separation layer monitoring device of the downhole sensing data acquisition subsystem passes through the fiber pigtail fiber and the fiber junction box and the mine transmission
- the optical fiber connection, the mining transmission fiber is connected with the fiber grating demodulation device of the ground control central room, and the fiber grating demodulation device is connected with the ground upper monitoring computer; the remote roadway top plate dynamic monitoring system for forming the monitoring system ground and underground communication .
- the monitoring system communicates with the ground in the downhole manner, and each of the fiber grating top plate off-layer monitoring devices of the downhole sensing data acquisition subsystem transmits the wavelength information of the separated off-layer layer through the fiber pigtail and the fiber optic junction box.
- the fiber grating demodulation device demodulates the wavelength information data into digital signal data, and then communicates through the network cable.
- the method transmits the digital signal to the main monitoring computer on the ground, and the main monitoring computer on the ground performs post-processing on the data, and timely feeds the data back to the underground to realize mutual communication between the ground and the underground.
- the ground upper main monitoring computer embeds the top plate off-layer data analysis processing software.
- the fiber grating top plate separation layer monitoring device can be installed and monitored by the following steps:
- One of the two gangs of the roadway is provided with a fiber optic junction box, and a drill with a diameter of 35-40 mm is drilled in the vicinity of the roof support bolt to drill a depth of 6-8 m on the roof of the roadway;
- a shallow measuring point and a deep measuring point are arranged inside the borehole, wherein the shallow measuring point is located at the same height as the upper end of the roof supporting anchor, and the deep measuring point is set at the stable rock layer at the upper end of the drilling hole.
- the fiber pigtails exposed in the roadway are connected to the fiber optic junction box, and the fiber grating top plate off-layer monitoring device can sense the displacement of the top plate from the layer.
- An early warning method for fiber-grating based roof dynamic monitoring system including the following contents:
- the power supply power supply is used to supply power to the ground host monitoring computer and the fiber grating demodulation device, and the fiber grating demodulation device is preheated for three minutes to make the fiber grating demodulation device enter a ready state;
- the fiber grating top plate off-layer monitoring device dynamically collects the displacement data of the top plate from the layer in real time, and determines whether the warning range is reached by automatically comparing the real-time displacement data with the set threshold value of the warning constant;
- the beneficial effect is that, due to the above scheme, when the roadway is excavated, the surrounding rock is deformed, resulting in shallow rock formation and The deep rock formations are separated and the roof is sinking.
- Two measuring points are arranged in the top plate drilling: the shallow measuring point and the deep measuring point, the shallow measuring point is set at the same height as the end of the top supporting bolt, and the deep measuring point is set in the relatively stable deep circumference.
- an anchor is placed at the measuring point to anchor the anchor to the roof rock.
- the invention adopts an indirect method for measuring the top plate separation layer of the bolt support roadway.
- the anchor of the fiber grating top plate separation layer monitoring device moves synchronously with the roof rock layer, so that the fiber grating top plate is separated from the layer monitoring device.
- the fiber grating is strained, causing the center wavelength of the fiber grating to drift.
- the fiber demodulation device is used to demodulate the wavelength signal into a digital signal, which is transmitted to the ground main monitoring computer, which can dynamically display the data change of the top layer from the layer in real time.
- the displacement data exceeds the set warning threshold, an early warning will occur, and corresponding measures will be taken in time to effectively prevent the roof from being unstable and collapsed.
- the application of this technology is to measure the size of the outer roof and the evaluation bolt in the anchoring area of the bolt support roadway. The effectiveness of support, the safety of roadways and the avoidance of sudden damage are of great significance.
- the invention has the following advantages:
- Fiber Bragg Gratings have extremely sensitive sensing characteristics and are capable of measuring the amount of displacement that varies little from the layer.
- the fiber grating top plate separation layer monitoring device utilizes the core technology of fiber grating.
- the fiber grating is intrinsically safe and passive. It can realize direct data acquisition in the underground field, which is convenient and flexible, and has strong anti-electromagnetic interference capability.
- the optical fiber is used for signal transmission. , Long transmission distance, high reliability and large measuring range.
- the automatic monitoring of the top layer and the real-time online dynamic continuous measurement are realized.
- the measured value of the displacement of the top plate can be calculated by measuring the wavelength change of the fiber grating.
- the deformation of the surrounding rock of the roadway can be obtained in time. It is reasonable to check whether the bolt support parameters are reasonable. Once the deformation of the surrounding rock exceeds the warning threshold, the early warning signal can be issued accurately and conveniently, so that the corresponding engineering measures can be taken in time and the original branch can be corrected. Maintenance parameters, to ensure the safe production of coal mines and to guide the design and construction of roadway support.
- the system can automatically save the separation monitoring data, analyze the separation displacement data monitored under the same surrounding rock conditions, and explore the deformation law of the surrounding rock of the roof, and provide the safe construction and design of the roadway with complicated and varied surrounding rock conditions. in accordance with.
- Fig. 1 is a view showing the overall arrangement of a monitoring system of the present invention.
- FIG. 2 is a mounting view of a single fiber grating top plate separation layer monitoring device of the present invention.
- FIG. 3 is a layout diagram of the entire layer roadway fiber grating top plate separation layer monitoring device of the present invention.
- FIG. 1 is a dynamic monitoring system for roadway roof separation based on fiber grating.
- the system includes ground data processing and control subsystem 1, downhole data transmission communication subsystem 2, and downhole sensing data acquisition subsystem.
- the ground data processing and subsystem 1 is placed in the ground control center room 11, and the ground data processing and subsystem 1 is composed of the ground upper main monitoring computer 4, the fiber grating demodulating device 5 and the power supply 6, and the power supply 6 is
- the ground main monitoring computer 4 and the fiber grating demodulating device 5 provide a rated power supply;
- the downhole transmission communication subsystem 2 is composed of a mining transmission fiber 7 and a fiber junction box 8, wherein the series transmission fiber 7 is connected in series with a series of fiber junction boxes. 8;
- the downhole sensing data acquisition subsystem 3 includes at least one fiber grating top plate separation layer monitoring device 10, and the fiber grating top plate separation layer monitoring device 10 is connected to the fiber optic junction box 8 through the fiber pigtail 9.
- the manner in which the monitoring system communicates with the ground and the well is:
- the respective fiber grating top plate isolation monitoring device 10 of the downhole sensing data acquisition subsystem 3 is connected to the mining transmission fiber 7 through the fiber pigtail 9 and the fiber junction box 8.
- the wavelength information of the top layer of the collected monitoring layer is transmitted to the mining transmission fiber 7, and the mining transmission fiber 7 is connected to the fiber grating demodulating device 5 of the ground control center room 11, and the wired transmission mode of the mining transmission fiber 7 is transmitted to
- the fiber grating demodulating device 5 of the ground control center room 11 and the fiber grating demodulating device 5 are connected to the ground main monitoring computer 4, and the fiber grating demodulating device 5 demodulates the wavelength information data into digital signal data, and then communicates through the network cable.
- the method transmits the digital signal to the ground main monitoring computer 4, and the ground main monitoring computer 4 performs post-processing on the data, and timely feeds the data back to the underground to realize mutual communication between the ground and the underground to form a remote communication between the ground and the underground.
- Roadway roof separation dynamic monitoring system
- Figure 2 is a layout diagram of the fiber grating top plate separation layer monitoring device, which can be installed and monitored by the following steps:
- One of the two gangs of the roadway 12 is provided with a fiber optic junction box 8, and a drill hole having a diameter of 35-40 mm is drilled in the vicinity of the roof support bolt 13 on the top plate of the roadway 12 to a predetermined Depth
- a shallow measuring point 15 and a deep measuring point 16 are arranged inside the borehole 14, wherein the shallow measuring point 15 is disposed at the same height as the upper end of the roof supporting anchor 13 and the deep measuring point 16 is disposed at Inside the stable rock formation at the upper end of the borehole 14;
- the fiber pigtail 9 exposed in the roadway 12 is connected to the fiber junction box. 8.
- the fiber grating top plate separation monitoring device can sense the displacement of the top plate from the layer.
- FIG. 3 is a schematic view showing the arrangement point of the fiber grating top plate separation layer monitoring device in the entire roadway, in the return air passage 22 and the air inlet roadway 23 at a position 120m from the upper and lower ends of the working surface 20, at a distance of 50m in two
- the measuring points are arranged in the roadway, and the fiber grating top plate off-layer monitoring device is arranged in the measuring point, and the fiber grating top plate separation layer monitoring device is sequentially connected through the fiber junction box and the mining transmission fiber to form a monitoring network, and the real-time dynamic monitoring records the roadway.
- the amount of displacement of the roof from the different positions of the coal wall at the working face is used to analyze the change of the supporting pressure to ensure the safety and stability of the bolt supporting roadway.
- Data processing and early warning methods including the following:
- the power supply power supply is used to supply power to the ground host monitoring computer and the fiber grating demodulation device, and the fiber grating demodulation device is preheated for three minutes to make the fiber grating demodulation device enter a ready state;
- the fiber grating top plate off-layer monitoring device dynamically collects the displacement data of the top plate from the layer in real time, and determines whether the warning range is reached by automatically comparing the real-time displacement data with the set threshold value of the warning constant;
- the present invention provides a fiber grating-based dynamic monitoring system for roadway roof separation and an early warning method.
- the system realizes automatic monitoring of the roof separation layer and real-time online dynamic continuous measurement, and the fiber grating is extremely sensitive.
- Sensing characteristics intrinsically safe, direct data acquisition at the underground site, strong anti-electromagnetic interference capability; signal transmission using optical fiber, long transmission distance, high reliability, large measuring range; timely obtaining deformation of surrounding rock of roadway, inspection Whether the bolt support parameters are reasonable, once the deformation of the surrounding rock exceeds the warning threshold, the early warning signal can be issued accurately and conveniently, so that the corresponding engineering measures can be taken in time, and the original support parameters are corrected.
- the early warning method is accurate and convenient; Data, analysis and study of the separation displacement data monitored under the same surrounding rock conditions, can explore the deformation law of the surrounding rock of the roof, and provide the basis for the safe construction and design of the roadway with complicated and varied surrounding conditions. Safe construction and stability To sense.
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
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Abstract
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2014339681A AU2014339681A1 (en) | 2013-10-25 | 2014-03-26 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
| RU2016104531A RU2630334C2 (ru) | 2013-10-25 | 2014-03-26 | Система динамического контроля отделения кровли выработки на основе волоконных решеток и способ предварительного оповещения |
| ZA2015/07452A ZA201507452B (en) | 2013-10-25 | 2015-10-07 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
| AU2017204543A AU2017204543B2 (en) | 2013-10-25 | 2017-07-03 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310508458.3A CN103510986B (zh) | 2013-10-25 | 2013-10-25 | 基于光纤光栅的巷道顶板离层动态监测系统及预警方法 |
| CN201310508458.3 | 2013-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015058487A1 true WO2015058487A1 (zh) | 2015-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2014/074081 Ceased WO2015058487A1 (zh) | 2013-10-25 | 2014-03-26 | 基于光纤光栅的巷道顶板离层动态监测系统及预警方法 |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN103510986B (zh) |
| AU (2) | AU2014339681A1 (zh) |
| RU (1) | RU2630334C2 (zh) |
| WO (1) | WO2015058487A1 (zh) |
| ZA (1) | ZA201507452B (zh) |
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- 2014-03-26 AU AU2014339681A patent/AU2014339681A1/en not_active Abandoned
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2015
- 2015-10-07 ZA ZA2015/07452A patent/ZA201507452B/en unknown
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2017
- 2017-07-03 AU AU2017204543A patent/AU2017204543B2/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109163688A (zh) * | 2018-08-17 | 2019-01-08 | 山东思科赛德矿业安全工程有限公司 | 一种三基点顶板离层监测仪 |
| CN109163688B (zh) * | 2018-08-17 | 2023-11-24 | 山东思科赛德矿业安全工程有限公司 | 一种三基点顶板离层监测仪 |
| CN109345754A (zh) * | 2018-11-06 | 2019-02-15 | 安徽理工大学 | 一种基于bp神经网络的矿井火灾预警监测系统及方法 |
| CN113359200A (zh) * | 2021-06-25 | 2021-09-07 | 中国矿业大学 | 一种基于核磁传感器的核废料掩埋场水体监测系统及方法 |
| CN116071545A (zh) * | 2023-02-02 | 2023-05-05 | 中国矿业大学 | 一种巷道顶板稳定性随钻感知方法 |
| CN116792155A (zh) * | 2023-06-26 | 2023-09-22 | 华南理工大学 | 一种基于分布式光纤传感的隧道健康状态监测预警方法 |
| CN116792155B (zh) * | 2023-06-26 | 2024-06-07 | 华南理工大学 | 一种基于分布式光纤传感的隧道健康状态监测预警方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2016104531A (ru) | 2017-08-15 |
| ZA201507452B (en) | 2018-09-26 |
| CN103510986A (zh) | 2014-01-15 |
| AU2017204543B2 (en) | 2019-04-18 |
| CN103510986B (zh) | 2015-05-20 |
| AU2014339681A1 (en) | 2016-01-28 |
| AU2017204543A1 (en) | 2017-07-27 |
| RU2630334C2 (ru) | 2017-09-07 |
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