WO2015058488A1 - 一种矿用光纤光栅顶板离层监测装置及监测方法 - Google Patents
一种矿用光纤光栅顶板离层监测装置及监测方法 Download PDFInfo
- Publication number
- WO2015058488A1 WO2015058488A1 PCT/CN2014/074083 CN2014074083W WO2015058488A1 WO 2015058488 A1 WO2015058488 A1 WO 2015058488A1 CN 2014074083 W CN2014074083 W CN 2014074083W WO 2015058488 A1 WO2015058488 A1 WO 2015058488A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- measuring point
- fiber grating
- data
- top plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
-
- 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 monitoring device and a monitoring method, in particular to a mine fiber grating top plate separation layer monitoring device and a monitoring method suitable for measurement and early warning of roof collapse in a coal mine roadway and a mining working face.
- the roof separation layer is one of the main forms of roadway surrounding rock deformation and failure.
- the roof separation layer is the biggest safety hazard; the separation displacement data of the roadway roof needs to be monitored at any time to understand the anchor.
- 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 alarms by electrical components, although these methods are active in preventing roof collapse. Function, but the above monitoring methods still have the following shortcomings:
- the manual timing observation is used to measure the separation condition of the top plate, the reading in the downhole is inconvenient, the reading error is large, the precision is not high, and the automatic continuous monitoring and data transmission of the roof separation layer cannot be realized.
- it is not good to warn the top layer off-layer data which has a great impact on the reliability of roadway and mining engineering safety.
- the object of the present invention is to overcome the deficiencies in the prior art, and provide a mine fiber grating top plate separation layer monitoring device with good monitoring effect, high measurement precision, timely warning and alarm, good reliability and real-time monitoring. Monitoring method.
- the mine fiber grating top plate separation layer monitoring device of the present invention comprises a vertical measuring tube disposed in the top plate drilling hole and a package housing connected under the vertical measuring tube, wherein the upper part of the package housing is symmetrically set
- the pulley fixing frame and the steel pulley fixing frame are provided with equal-strength cantilever beams in the lower part, and the optical fiber lead-out holes are symmetrically opened on the left and right sides of the package housing, and the pulley fixing frame is provided with a fixed pulley, the steel belt
- the wheel fixing frame is provided with a steel pulley
- the symmetrically arranged equal-strength cantilever beam is respectively provided with a tension spring at one end, and the other end of the two tension springs is connected with a steel wire rope, and the steel wire rope passes through the rigid pulley and the fixed pulley from the vertical measuring cylinder
- the top of the wire rope lead-out hole is pierced, and the end of the wire rope passing through the wire rope take
- the vertical measuring cylinder has a diameter of 30-35 mm and a length of 250-350 mm.
- the anchoring claws on the anchoring head are 2-4.
- the A fiber grating and the B fiber grating have the same shape and different wavelengths.
- the wire rope has a maximum length of 7 m.
- the fixed pulley is a plastic bearing pulley with a U-shaped groove.
- a mine fiber grating top plate separation layer monitoring method using the above device :
- optical fiber connector of the outer fiber of the package housing is connected to the fiber junction box;
- the change of the force of the wire rope is displayed by the wavelength values of the A fiber grating and the B fiber grating.
- the wavelength demodulation device is used to demodulate the wavelength value into a digital signal, and sent to a computer to visually display the value of the top plate isolation layer, combined with the separation value.
- the present invention utilizes differential temperature compensation to realize on-line measurement of the roof separation layer, which can avoid the occurrence of roofing accidents, and is of great significance for the safe construction and stability of the bolt support roadway.
- the monitoring effect is good, the measurement accuracy is high, the early warning and alarm of the separated data can be timely, the reliability is good, the automatic monitoring can be performed, and the real-time online continuous monitoring is performed.
- the steel wire rope is wound on the rigid belt pulley. Regardless of the displacement of the separation layer, as long as the length of the steel rope is sufficient, the value of the separation layer can also be accurately measured;
- Fiber grating can realize direct data acquisition in the underground, convenient and flexible, and strong anti-electromagnetic interference capability; Signal transmission by optical fiber, long transmission distance, high reliability and large measurement range;
- the on-line measurement of the top layer is realized.
- the displacement of the top plate is converted into the deflection of the free end of the cantilever beam by the wire rope and the tension spring, thereby causing the fiber to be attached to the left and right sides of the equal-strength cantilever beam.
- the change of the center wavelength of the grating, the size of the top layer is calculated by measuring the wavelength change of the fiber grating;
- the fiber gratings on the left and right sides of the equal-strength cantilever beam use the differential temperature compensation method to achieve temperature compensation, solve the cross-sensitivity of strain and temperature, eliminate the influence of temperature on the strain of the fiber grating, and improve the measurement. Accuracy.
- Figure 1 is a schematic front view showing the structure of the present invention
- Figure 3 is a schematic plan view of the present invention.
- FIG. 4 is a schematic view showing the position of a fiber grating on an equal-strength cantilever beam according to the present invention
- Figure 5 is a right side view of Figure 4.
- Figure 6 is a schematic view showing the installation arrangement of the present invention.
- Figure 7 is a schematic diagram of the device for monitoring the separation layer of the present invention.
- the mine fiber grating top plate separation layer monitoring device of the present invention comprises a vertical measuring cylinder 1 disposed in the top plate drilling hole, and the vertical measuring cylinder 1 has a diameter of 30-35 mm and a length of 250-350 mm, and is packaged.
- the housing 19 is connected to the lower end of the vertical measuring cylinder 1.
- the fixed pulley fixing frame 6 and the steel pulley fixing frame 7 are symmetrically arranged on the upper part of the packaging housing 19.
- the lower part is symmetrically provided with the equal-strength cantilever beam 15, and the left and right sides of the packaging housing 19
- the fiber-distributing hole 10 is symmetrically disposed on the side, and the fixed pulley 18 is disposed on the pulley fixing frame 6.
- the steel pulley 17 is disposed on the steel pulley fixing frame 7, and the tension spring 16 is respectively disposed at one end of the symmetrically disposed equal-strength cantilever beam 15
- the other end of the two tension springs 16 is connected with a wire rope 3, and the wire rope 3 passes through the steel pulley take-up hole 2 at the top of the vertical measuring cylinder 1 through the rigid pulley 17 and the fixed pulley 18, and passes through the end of the wire rope 3 of the wire rope take-out hole 2.
- the head is connected with an anchoring head 5, and at least two anchoring claws 4 are disposed on the anchoring head 5; the A-fiber grating 8 and the B-fiber grating 9 are symmetrically disposed on the left and right sides of the equal-strength cantilever beam 15, and the A fiber gratings 8 and B are provided.
- the fiber grating 9 has the same shape and shape, and is aligned up, down, left, and right. The wavelengths of the fibers are different from each other, and the A fiber grating 8 and the B fiber grating 9 are connected from the fiber exit hole 10 through the same fiber 12 to the fiber connector 14, and the fiber exit hole 10 is sealed with the fiber.
- the sealant 11 of the hole 10, the optical fiber 12 drawn from the fiber lead-out hole 10 is provided with a rubber protective layer 13.
- a shallow measuring point 24 and a deep measuring point 25 are arranged inside the borehole, wherein the shallow measuring point 24 is disposed at the same height as the upper end of the top board anchor 21, and the deep measuring point 25 is disposed at the upper end of the drilling hole 22.
- the package housing 19 external fiber 12 fiber optic connector 14 is connected to the fiber optic junction box 23;
- the change of the force of the wire rope 3 is displayed by the wavelength values of the A fiber grating 8 and the B fiber grating 9.
- the wavelength demodulation device is used to demodulate the wavelength value into a digital signal, and sent to a computer to visually display the value of the top layer of the top plate, combined with The value of the separation layer is plotted against the layer thickness curve and the set separation threshold value, to determine whether there is obvious separation layer, and the data change of the roof separation layer is monitored in real time:
- the fiber grating used in the invention has extremely sensitive sensing characteristics, and the differential temperature compensation method is used to eliminate the influence of temperature on the strain of the fiber grating, and the value of the displacement of the layer can be accurately measured.
- the on-line measurement of the top plate is realized, and the data is directly collected in the underground field, which is convenient and flexible, and has strong anti-electromagnetic interference capability.
- the optical fiber is used for signal transmission, the transmission distance is long, the reliability is high, the measurement range is large, and the data can be accurately and conveniently issued.
- the fiber gratings on the left and right sides of the equal-strength cantilever beam are fiber gratings of the same center wavelength with the same shape and shape, which are aligned up and down and left and right, and are in the same working environment.
- the temperature change causes the central wavelength of the two fiber gratings to change synchronously, and the center wavelength of the two fiber gratings caused by the stress is opposite in the same direction, and the center wavelength of the A fiber grating on the left side of the equal-strength cantilever beam
- a A -A B 2 ⁇ , thereby eliminating the influence of temperature on the fiber grating, solving the problem of strain and temperature cross sensitivity, and improving the accuracy and sensitivity of the measurement.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2016110150A RU2627051C1 (ru) | 2013-10-25 | 2014-03-26 | Устройство и способ мониторинга отделительного слоя кровли на основе волоконной решетки в горной разработке |
| AU2014339682A AU2014339682B2 (en) | 2013-10-25 | 2014-03-26 | Apparatus and method for monitoring mining fiber grating roof separation layer |
| ZA2016/01972A ZA201601972B (en) | 2013-10-25 | 2016-03-22 | Apparatus and method for monitoring mining fiber grating roof separation layer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310511355.2A CN103528530B (zh) | 2013-10-25 | 2013-10-25 | 一种矿用光纤光栅顶板离层监测装置及监测方法 |
| CN201310511355.2 | 2013-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015058488A1 true WO2015058488A1 (zh) | 2015-04-30 |
Family
ID=49930736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2014/074083 Ceased WO2015058488A1 (zh) | 2013-10-25 | 2014-03-26 | 一种矿用光纤光栅顶板离层监测装置及监测方法 |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN103528530B (zh) |
| AU (1) | AU2014339682B2 (zh) |
| RU (1) | RU2627051C1 (zh) |
| WO (1) | WO2015058488A1 (zh) |
| ZA (1) | ZA201601972B (zh) |
Cited By (6)
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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 |
| CN112161582A (zh) * | 2020-07-30 | 2021-01-01 | 南京朔宁光电科技有限公司 | 一种组合型量程可调式光纤多点离层仪及测量方法 |
| CN112880580A (zh) * | 2021-01-13 | 2021-06-01 | 中煤科工集团重庆研究院有限公司 | 一种光纤嵌入式柔性杆体感测巷道围岩变形的方法及系统 |
| CN113933174A (zh) * | 2021-09-16 | 2022-01-14 | 青岛理工大学 | 岩石离层变形影响下的全长锚固类锚杆界面应力测试方法、系统 |
| CN114910001A (zh) * | 2022-03-28 | 2022-08-16 | 广东省建筑设计研究院有限公司 | 一种基于光纤传感技术的屋面板结构、系统及监测方法 |
| CN116481411A (zh) * | 2023-04-26 | 2023-07-25 | 泰安泰烁岩层控制科技有限公司 | 一种高精度多点顶板离层仪及其安装方法 |
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| CN103743357A (zh) * | 2014-01-24 | 2014-04-23 | 西安科技大学 | 一种监测岩石顶板变形的光纤光栅离层装置 |
| CN103759659B (zh) * | 2014-01-27 | 2016-04-13 | 山东微感光电子有限公司 | 一种可进行多点测量的光纤光栅位移传感器 |
| CN103993911B (zh) * | 2014-05-21 | 2016-01-06 | 中国矿业大学 | 综合机械化充填采煤采空区顶板动态监测仪 |
| CN106247965A (zh) * | 2016-07-15 | 2016-12-21 | 东南大学 | 基于多功能智能锚杆的隧道围岩监测方法 |
| CN106437802B (zh) * | 2016-12-23 | 2019-12-20 | 山东科技大学 | 具有警示功能的锚杆让压装置及使用方法 |
| CN106908033B (zh) * | 2017-04-11 | 2022-10-11 | 山东科技大学 | 一种采空区顶板多点位移同步测量装置及其测量方法 |
| CN108981814B (zh) * | 2018-07-23 | 2023-09-29 | 山西大同大学 | 一种用于监测巷道围岩实时参数的装置及方法 |
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- 2014-03-26 RU RU2016110150A patent/RU2627051C1/ru active
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112161582A (zh) * | 2020-07-30 | 2021-01-01 | 南京朔宁光电科技有限公司 | 一种组合型量程可调式光纤多点离层仪及测量方法 |
| CN112880580A (zh) * | 2021-01-13 | 2021-06-01 | 中煤科工集团重庆研究院有限公司 | 一种光纤嵌入式柔性杆体感测巷道围岩变形的方法及系统 |
| CN112880580B (zh) * | 2021-01-13 | 2022-06-03 | 中煤科工集团重庆研究院有限公司 | 一种光纤嵌入式柔性杆体感测巷道围岩变形的方法及系统 |
| CN113933174A (zh) * | 2021-09-16 | 2022-01-14 | 青岛理工大学 | 岩石离层变形影响下的全长锚固类锚杆界面应力测试方法、系统 |
| CN114910001A (zh) * | 2022-03-28 | 2022-08-16 | 广东省建筑设计研究院有限公司 | 一种基于光纤传感技术的屋面板结构、系统及监测方法 |
| CN114910001B (zh) * | 2022-03-28 | 2024-05-28 | 广东省建筑设计研究院有限公司 | 一种基于光纤传感技术的屋面板结构、系统及监测方法 |
| CN116481411A (zh) * | 2023-04-26 | 2023-07-25 | 泰安泰烁岩层控制科技有限公司 | 一种高精度多点顶板离层仪及其安装方法 |
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| Publication number | Publication date |
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| AU2014339682B2 (en) | 2018-01-18 |
| CN103528530B (zh) | 2015-10-14 |
| AU2014339682A1 (en) | 2016-04-28 |
| RU2627051C1 (ru) | 2017-08-03 |
| ZA201601972B (en) | 2017-09-27 |
| CN103528530A (zh) | 2014-01-22 |
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