CN103454021A - Roadway surrounding rock stress monitoring device based on fiber bragg grating sensing - Google Patents
Roadway surrounding rock stress monitoring device based on fiber bragg grating sensing Download PDFInfo
- Publication number
- CN103454021A CN103454021A CN2013103584518A CN201310358451A CN103454021A CN 103454021 A CN103454021 A CN 103454021A CN 2013103584518 A CN2013103584518 A CN 2013103584518A CN 201310358451 A CN201310358451 A CN 201310358451A CN 103454021 A CN103454021 A CN 103454021A
- Authority
- CN
- China
- Prior art keywords
- grating
- surrounding rock
- optical fiber
- fbg
- roadway surrounding
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a roadway surrounding rock stress monitoring device based on fiber bragg grating sensing. Grooves are symmetrically carved in a metal rod along the axial center, an FBG set is fixedly installed inside each groove, FBGs serve as sensitive elements, when roadway surrounding rock is deformed, the stress of the surrounding rock will be changed, therefore, force is generated through the metal rod, surface micro-deformation is generated, the grating distances of the FBGs attached to the metal rod are changed along with the metal rod, the center reflection wavelength of the FBGs can be caused to generate drifting, wavelength signals are demodulated into electrical signals through an FBG interrogator, and the stress situations of different sites can be obtained. The roadway surrounding rock stress monitoring device has the advantages that installation is easily achieved, and the roadway surrounding rock stress monitoring device is suitable for wide popularization; power is not required to be supplied to the working face end, and site safety is guaranteed; all-optical measurement and fiber transmission are adopted, and influences of electromagnetic interference are effectively avoided; the temperature error is compensated, and the accuracy is improved; the surrounding rock stress monitoring results can be timely and accurately provided, and guidance on site production and scientific research is facilitated.
Description
Technical field
The present invention relates to a kind of coal mine roadway surrouding rock stress monitoring device, specifically a kind of roadway surrounding rock monitor for stress based on optical fiber grating sensing.
Background technology
In recent years, in all kinds of coal mining accident of China, the accident that the country rock disaster causes is high, also seriously destroy tunnel, destroy transportation and ventilating system, along with the continuous increase of the coal mining degree of depth, the country rock disaster is even more serious, and the country rock disaster has become the key factor that affects Safety of Coal Mine Production.For the country rock accident of stablizing, prevent that guarantees roadway surrounding rock affects safety in production, existing colliery generally takes to carry out immediately supporting after tunnelling, monitoring to surrouding rock stress more and more comes into one's own, simultaneously also more and more higher to the requirement of accuracy, reliability and on-line monitoring ability of monitoring.
But the monitoring technology of existing mine working country rock is very strong to having a certain special purpose or device dependence, basically belongs to traditional safety monitoring technology means.Although, as strain chip dynamometry Metallic rod, fluid pressure type Metallic rod dynamometer etc. have advantages of differently, the problem of most critical is, these monitoring of equipments to data be in fact the force-bearing situation of Metallic rod, but not the actual stress situation of roadway surrounding rock.These equipment exist various shortcomings simultaneously, and concrete manifestation has: employing is artificial to be interrupted observation and to gather, and monitoring result hysteresis and the data error obtained are larger; Survey station breakpoint formula distributes, discontinuous, can not carry out distribution measuring and full-automatic information process-; Be subject to electromagnetism and down-hole wet environment and disturb, reliability is low; Monitoring efficiency is not high, and the sensing element life-span is short; Can't carry out remote monitoring to monitoring, can not realize real time on-line monitoring and long term monitoring.
Summary of the invention
Technical matters: in order to overcome deficiency of the prior art, the invention provides that a kind of precision is high, error is little, antijamming capability is strong, the life-span is long, can carry out long-range real time on-line monitoring and long term monitoring, the roadway surrounding rock monitor for stress based on optical fiber grating sensing of full-automatic information process-data.
Technical scheme: purpose of the present invention is achieved through the following technical solutions: this roadway surrounding rock monitor for stress comprises: Metallic rod, groove, FBG grating group, optical fiber, optical fiber grating protecting pipe, optical fiber cable for mine, fiber Bragg grating (FBG) demodulator and computer system; Fluted on the shaft of Metallic rod; FBG grating group is arranged in groove, and FBG grating group is connected with optical fiber, and the optical fiber grating protecting pipe is arranged on Metallic rod shaft surface; optical fiber is connected with optical fiber cable for mine and leads directly to ground, and optical fiber, fiber Bragg grating (FBG) demodulator and computer system are linked in sequence.
Described FBG grating group at least respectively comprises an axial strain grating, a transverse strain grating and a temperature grating, wherein the axial strain grating only is subject to axial force, the transverse strain grating only is subject to transverse force and is restricted to plane strain state axially without strain, a temperature grating temperature influence that do not stress.
Beneficial effect: owing to having adopted such scheme, by Metallic rod Central Symmetry fluting vertically, fixed installation FBG grating group in groove, utilize FBG grating group as sensitive element, fiber connector is drawn with optical fiber and is connected from afterbody, the fiber Bragg grating (FBG) demodulator on the straight-through ground of access optical fiber cable for mine, when deformation of the surrounding rock in tunnel, surrouding rock stress will change, make Metallic rod produce power, will produce surperficial microdeformation, make the pitch of the FBG grating be attached on Metallic rod to deform with it, will cause the reflection kernel wavelength of grating to produce drift, utilize fiber Bragg grating (FBG) demodulator that wavelength signals is demodulated into to electric signal, can obtain the stressing conditions of difference, by computing machine, electric signal is carried out to real-time analysis processing and monitoring, and draw the analysis and processing method of country rock axial stress and transverse stress under the temperature compensation condition according to the grating stress characteristic, realize coal mine roadway surrouding rock stress real-time monitoring system, comprehensively understand the roadway surrounding rock stress state, for stability and the security that improves roadway surrounding rock provides foundation, ensured the safety in production in colliery, be beneficial to guide field production and research work.
The present invention compares and has the following advantages with conventional art:
1, be convenient to realize, equipment is installed simple, and long service life, be suitable for generally applying;
2, down-hole does not need power supply, does not have electric signal and electron device, has guaranteed site safety;
3, adopt full photo measure and Optical Fiber Transmission, can effectively avoid the impact of electromagnetic interference (EMI) under complicated rugged surroundings;
4, temperature error is compensated, improved precision;
5, the surrouding rock stress monitoring result be can provide timely and accurately, guide field production and research work are beneficial to.
The accompanying drawing explanation
Fig. 1 is that device of the present invention is installed and used schematic diagram;
Fig. 2 is apparatus structure schematic diagram of the present invention;
The A-A figure that Fig. 3 is Fig. 2.
In figure, 1, Metallic rod; 2, groove; 3, FBG grating group; 4, optical fiber; 5, optical fiber grating protecting pipe; 6, optical fiber cable for mine; 7, fiber Bragg grating (FBG) demodulator; 8, computer system; 9, country rock; 10, Anchor Agent; 11, sand-cement slurry.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Embodiment 1: this roadway surrounding rock monitor for stress comprises: Metallic rod 1, groove 2, FBG grating group 3, optical fiber 4, optical fiber grating protecting pipe 5, optical fiber cable for mine 6, fiber Bragg grating (FBG) demodulator 7 and computer system 8; On the shaft of Metallic rod 1 fluted 2; FBG grating group 3 is arranged in groove 2; FBG grating group 3 is connected with optical fiber 4; optical fiber grating protecting pipe 5 is arranged on Metallic rod 1 shaft surface; optical fiber 4 is connected and straight-through ground with optical fiber cable for mine 6, and optical fiber 4, fiber Bragg grating (FBG) demodulator 7 and computer system 8 are linked in sequence.
Described device is assembly and connection through the following steps: by Metallic rod 1 vertically Central Symmetry carve 4 groups of grooves 2, the country rock Depth determination that the position of groove 2 is surveyed according to need, be 1-2mm deeply, and width is 2-4mm, length is determined according to pasted grating quantity and grating space, is generally 1-4mm; By groove 2 inside surface polishings, with absorbent cotton, dip in acetone or alcohol cleaning groove; With quick-drying gelatin or epoxy resin glue, FBG grating group 3 is fixed and evenly cements in each groove 2, and fill epoxy resin glue, with protection FBG grating group 3; Optical fiber grating protecting pipe 5 is positioned on Metallic rod 1 shaft, and FBG grating group 3 is all covered; The fiber connector of FBG grating group 3 is drawn from Metallic rod 1 afterbody, be connected with optical fiber 4; By optical fiber 4 access optical fiber cable for mine 6, the straight-through ground of optical fiber cable for mine 6 also is connected with fiber Bragg grating (FBG) demodulator 7, realizes that light signal is from down-hole to aboveground transmission; Fiber Bragg grating (FBG) demodulator 7 is connected with computer system 8, light signal is demodulated into to digital signal and transfers to computing machine and processed.
Described FBG grating group 3 at least respectively comprises an axial strain grating, a transverse strain grating and a temperature grating, wherein the axial strain grating only is subject to axial force, the transverse strain grating only is subject to transverse force and is restricted to plane strain state (axially without strain), a temperature grating temperature influence that do not stress.
By above concrete enforcement, the invention provides the roadway surrounding rock monitor for stress based on optical fiber grating sensing, by Metallic rod Central Symmetry fluting vertically, fixed installation FBG grating group in groove, utilize FBG grating group as sensitive element, fiber connector is drawn with optical fiber and is connected from afterbody, the fiber Bragg grating (FBG) demodulator on the straight-through ground of access optical fiber cable for mine, when deformation of the surrounding rock in tunnel, surrouding rock stress will change, make Metallic rod produce power, will produce surperficial microdeformation, make the pitch of the FBG grating be attached on Metallic rod to deform with it, will cause the reflection kernel wavelength of grating to produce drift, utilize fiber Bragg grating (FBG) demodulator that wavelength signals is demodulated into to electric signal, can obtain the stressing conditions of difference, by computing machine, electric signal is carried out to real-time analysis processing and monitoring, realize coal mine roadway surrouding rock stress Real-Time Monitoring, comprehensively understand the roadway surrounding rock stress state, for stability and the security that improves roadway surrounding rock provides foundation, ensured the safety in production in colliery, be beneficial to guide field production and research work.
Claims (2)
1. the roadway surrounding rock monitor for stress based on optical fiber grating sensing, it is characterized in that: this roadway surrounding rock monitor for stress comprises: Metallic rod, groove, FBG grating group, optical fiber, optical fiber grating protecting pipe, optical fiber cable for mine, fiber Bragg grating (FBG) demodulator and computer system; Fluted on the shaft of Metallic rod; FBG grating group is arranged in groove, and FBG grating group is connected with optical fiber, and the optical fiber grating protecting pipe is arranged on Metallic rod shaft surface; optical fiber is connected with optical fiber cable for mine and leads directly to ground, and optical fiber, fiber Bragg grating (FBG) demodulator and computer system are linked in sequence.
2. according to the described a kind of roadway surrounding rock monitor for stress based on optical fiber grating sensing of claims 1, be further characterized in that: described FBG grating group at least respectively comprises an axial strain grating, a transverse strain grating and a temperature grating, wherein the axial strain grating only is subject to axial force, the transverse strain grating only is subject to transverse force and is restricted to plane strain state, axially without strain, a temperature grating temperature influence that do not stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310358451.8A CN103454021B (en) | 2013-08-15 | 2013-08-15 | Roadway surrounding rock stress monitoring device based on fiber bragg grating sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310358451.8A CN103454021B (en) | 2013-08-15 | 2013-08-15 | Roadway surrounding rock stress monitoring device based on fiber bragg grating sensing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103454021A true CN103454021A (en) | 2013-12-18 |
| CN103454021B CN103454021B (en) | 2015-06-24 |
Family
ID=49736639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310358451.8A Active CN103454021B (en) | 2013-08-15 | 2013-08-15 | Roadway surrounding rock stress monitoring device based on fiber bragg grating sensing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103454021B (en) |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197890A (en) * | 2014-09-15 | 2014-12-10 | 中国矿业大学 | Device and method for measuring two-dimensional strain of well wall surface |
| CN104280167A (en) * | 2014-10-13 | 2015-01-14 | 中国科学院武汉岩土力学研究所 | Three-dimensional stress test device for single-hole multi-point hollow fiber grating inclusion in rock mass engineering |
| CN104316992A (en) * | 2014-11-05 | 2015-01-28 | 长飞光纤光缆股份有限公司 | Large-core-diameter energy optical fiber with temperature and strain monitoring function and manufacturing method thereof |
| CN104330043A (en) * | 2014-10-23 | 2015-02-04 | 燕山大学 | Temperature self-compensation fiber grating large-strain sensor |
| CN104713490A (en) * | 2015-02-03 | 2015-06-17 | 中国长江三峡集团公司 | Large surrounding rock stress measuring device and method based on fiber bragg grating displacement meter string |
| CN104315988B (en) * | 2014-10-10 | 2017-01-25 | 中国矿业大学 | Distributive optical fiber detection method for mining overburden rock deformation |
| CN106441389A (en) * | 2016-09-06 | 2017-02-22 | 武汉理工大学 | Fiber grating rock damage evolution monitoring system |
| CN106441660A (en) * | 2016-12-02 | 2017-02-22 | 西南交通大学 | Anchor bolt pad force measuring device |
| CN108087029A (en) * | 2017-11-16 | 2018-05-29 | 长安大学 | A kind of measuring point guard method of fiber grating force-measuring locking foot anchor tube |
| CN108195304A (en) * | 2017-11-28 | 2018-06-22 | 中国矿业大学 | A kind of Coal Face with Greater Mining Height coal wall caving depth assay method |
| CN108680115A (en) * | 2018-07-25 | 2018-10-19 | 深圳市简测科技有限公司 | A kind of device for monitoring the deformation of piping lane bidirectional displacement |
| CN108709586A (en) * | 2018-04-23 | 2018-10-26 | 河海大学 | Bolt deformation distributed monitoring system based on OFDR and application method |
| CN108801216A (en) * | 2018-05-09 | 2018-11-13 | 中国矿业大学 | A kind of fiber bragg grating inclinator |
| CN108872806A (en) * | 2018-06-07 | 2018-11-23 | 华南理工大学 | A method of measurement composite insulator icing degree |
| CN108918012A (en) * | 2018-07-16 | 2018-11-30 | 中铁十四局集团有限公司 | One kind being used for Shield-bored tunnels country rock Disturbance stress monitoring method |
| CN110657905A (en) * | 2019-08-27 | 2020-01-07 | 山东大学 | Tunnel surrounding rock internal stress distributed monitoring device, construction method and monitoring method |
| CN110849719A (en) * | 2019-09-29 | 2020-02-28 | 上海市隧道工程轨道交通设计研究院 | Monitoring method for compression and tensile deformation of stress rod piece based on optical fiber sensing technology |
| CN111006606A (en) * | 2019-12-31 | 2020-04-14 | 山东科技大学 | On-line monitoring system and monitoring method for deformation of filling body based on fiber bragg grating sensing |
| CN111272565A (en) * | 2020-03-10 | 2020-06-12 | 大连理工大学 | Test method for detecting rock mechanical parameters |
| CN111307346A (en) * | 2020-03-13 | 2020-06-19 | 山东大学 | Side slope critical slip surface monitoring system and method |
| CN111486799A (en) * | 2020-04-30 | 2020-08-04 | 中山市精量光电子科技有限公司 | Fiber grating shape perception sensor |
| CN111678455A (en) * | 2020-07-16 | 2020-09-18 | 山东舜感光电科技有限公司 | Memorable metal optical fiber strain sensor |
| CN112880580A (en) * | 2021-01-13 | 2021-06-01 | 中煤科工集团重庆研究院有限公司 | Method and system for sensing roadway surrounding rock deformation by optical fiber embedded flexible rod body |
| CN113916142A (en) * | 2021-09-23 | 2022-01-11 | 广东精铟海洋工程股份有限公司 | Fiber grating gear strain monitoring sensor with temperature compensation function, strain monitoring system using fiber grating gear strain monitoring sensor and temperature compensation method |
| CN114046914A (en) * | 2021-10-25 | 2022-02-15 | 煤炭科学研究总院 | Surrounding rock stress detection method and device and electronic equipment |
| CN114353750A (en) * | 2022-01-12 | 2022-04-15 | 中国路桥工程有限责任公司 | Omnidirectional tunnel section settlement monitoring device |
| CN115615347A (en) * | 2022-12-20 | 2023-01-17 | 清华大学 | Superconducting coil strain monitoring device based on distributed optical fiber |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328503B (en) * | 2017-07-11 | 2019-12-06 | 中国矿业大学 | coal mine tunnel roof stress on-line monitoring system and method based on fiber bragg grating sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202033138U (en) * | 2010-11-08 | 2011-11-09 | 昆明理工大学 | Fiber Bragg grating distributed anchor pole force cell sensor |
| CN102798492A (en) * | 2012-08-30 | 2012-11-28 | 西安科技大学 | Fiber bragg grating detection system device and method for detecting anchoring force of anchor rod |
| CN102818665A (en) * | 2012-08-28 | 2012-12-12 | 中国矿业大学 | Device and method for integrated collection of stress and displacement of surrounding rocks |
| CN202693170U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Fiber Bragg grating pre-stressed force-measuring rock bolt |
-
2013
- 2013-08-15 CN CN201310358451.8A patent/CN103454021B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202033138U (en) * | 2010-11-08 | 2011-11-09 | 昆明理工大学 | Fiber Bragg grating distributed anchor pole force cell sensor |
| CN202693170U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Fiber Bragg grating pre-stressed force-measuring rock bolt |
| CN102818665A (en) * | 2012-08-28 | 2012-12-12 | 中国矿业大学 | Device and method for integrated collection of stress and displacement of surrounding rocks |
| CN102798492A (en) * | 2012-08-30 | 2012-11-28 | 西安科技大学 | Fiber bragg grating detection system device and method for detecting anchoring force of anchor rod |
Non-Patent Citations (1)
| Title |
|---|
| 方新秋等: "深井破碎围岩巷道变形机理及控制研究", 《采矿与安全工程学报》 * |
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197890B (en) * | 2014-09-15 | 2016-12-07 | 中国矿业大学 | A kind of device and method measuring borehole wall surface Two-dimensional strain |
| CN104197890A (en) * | 2014-09-15 | 2014-12-10 | 中国矿业大学 | Device and method for measuring two-dimensional strain of well wall surface |
| CN104315988B (en) * | 2014-10-10 | 2017-01-25 | 中国矿业大学 | Distributive optical fiber detection method for mining overburden rock deformation |
| CN104280167A (en) * | 2014-10-13 | 2015-01-14 | 中国科学院武汉岩土力学研究所 | Three-dimensional stress test device for single-hole multi-point hollow fiber grating inclusion in rock mass engineering |
| CN104280167B (en) * | 2014-10-13 | 2016-06-01 | 中国科学院武汉岩土力学研究所 | The hollow inclusion three dimensional stress test set of rock mass engineering project single hole multiple spot fiber grating |
| CN104330043A (en) * | 2014-10-23 | 2015-02-04 | 燕山大学 | Temperature self-compensation fiber grating large-strain sensor |
| CN104316992B (en) * | 2014-11-05 | 2017-07-21 | 长飞光纤光缆股份有限公司 | Big core diameter energy optical fiber with temperature and strain monitoring and preparation method thereof |
| CN104316992A (en) * | 2014-11-05 | 2015-01-28 | 长飞光纤光缆股份有限公司 | Large-core-diameter energy optical fiber with temperature and strain monitoring function and manufacturing method thereof |
| CN104713490A (en) * | 2015-02-03 | 2015-06-17 | 中国长江三峡集团公司 | Large surrounding rock stress measuring device and method based on fiber bragg grating displacement meter string |
| CN104713490B (en) * | 2015-02-03 | 2017-12-01 | 中国长江三峡集团公司 | A kind of apparatus and method based on the measurement big strain of country rock of Optical Fiber Grating Displacement Meter string |
| CN106441389A (en) * | 2016-09-06 | 2017-02-22 | 武汉理工大学 | Fiber grating rock damage evolution monitoring system |
| CN106441660A (en) * | 2016-12-02 | 2017-02-22 | 西南交通大学 | Anchor bolt pad force measuring device |
| CN108087029A (en) * | 2017-11-16 | 2018-05-29 | 长安大学 | A kind of measuring point guard method of fiber grating force-measuring locking foot anchor tube |
| CN108087029B (en) * | 2017-11-16 | 2019-09-20 | 长安大学 | A kind of measuring point guard method of fiber grating force-measuring locking foot anchor tube |
| CN108195304A (en) * | 2017-11-28 | 2018-06-22 | 中国矿业大学 | A kind of Coal Face with Greater Mining Height coal wall caving depth assay method |
| CN108709586A (en) * | 2018-04-23 | 2018-10-26 | 河海大学 | Bolt deformation distributed monitoring system based on OFDR and application method |
| CN108801216A (en) * | 2018-05-09 | 2018-11-13 | 中国矿业大学 | A kind of fiber bragg grating inclinator |
| CN108872806A (en) * | 2018-06-07 | 2018-11-23 | 华南理工大学 | A method of measurement composite insulator icing degree |
| CN108918012A (en) * | 2018-07-16 | 2018-11-30 | 中铁十四局集团有限公司 | One kind being used for Shield-bored tunnels country rock Disturbance stress monitoring method |
| CN108918012B (en) * | 2018-07-16 | 2020-07-28 | 中铁十四局集团有限公司 | Method for monitoring disturbance stress of surrounding rock of subway shield tunnel |
| CN108680115A (en) * | 2018-07-25 | 2018-10-19 | 深圳市简测科技有限公司 | A kind of device for monitoring the deformation of piping lane bidirectional displacement |
| CN110657905A (en) * | 2019-08-27 | 2020-01-07 | 山东大学 | Tunnel surrounding rock internal stress distributed monitoring device, construction method and monitoring method |
| CN110849719B (en) * | 2019-09-29 | 2022-04-05 | 上海市隧道工程轨道交通设计研究院 | Monitoring method for compression and tensile deformation of stress rod piece based on optical fiber sensing technology |
| CN110849719A (en) * | 2019-09-29 | 2020-02-28 | 上海市隧道工程轨道交通设计研究院 | Monitoring method for compression and tensile deformation of stress rod piece based on optical fiber sensing technology |
| CN111006606A (en) * | 2019-12-31 | 2020-04-14 | 山东科技大学 | On-line monitoring system and monitoring method for deformation of filling body based on fiber bragg grating sensing |
| CN111006606B (en) * | 2019-12-31 | 2021-01-05 | 山东科技大学 | On-line monitoring system and monitoring method for deformation of filling body based on fiber bragg grating sensing |
| CN111272565A (en) * | 2020-03-10 | 2020-06-12 | 大连理工大学 | Test method for detecting rock mechanical parameters |
| CN111307346A (en) * | 2020-03-13 | 2020-06-19 | 山东大学 | Side slope critical slip surface monitoring system and method |
| CN111486799A (en) * | 2020-04-30 | 2020-08-04 | 中山市精量光电子科技有限公司 | Fiber grating shape perception sensor |
| CN111678455A (en) * | 2020-07-16 | 2020-09-18 | 山东舜感光电科技有限公司 | Memorable metal optical fiber strain sensor |
| CN112880580A (en) * | 2021-01-13 | 2021-06-01 | 中煤科工集团重庆研究院有限公司 | Method and system for sensing roadway surrounding rock deformation by optical fiber embedded flexible rod body |
| CN112880580B (en) * | 2021-01-13 | 2022-06-03 | 中煤科工集团重庆研究院有限公司 | Method and system for sensing roadway surrounding rock deformation by optical fiber embedded flexible rod body |
| CN113916142A (en) * | 2021-09-23 | 2022-01-11 | 广东精铟海洋工程股份有限公司 | Fiber grating gear strain monitoring sensor with temperature compensation function, strain monitoring system using fiber grating gear strain monitoring sensor and temperature compensation method |
| CN114046914A (en) * | 2021-10-25 | 2022-02-15 | 煤炭科学研究总院 | Surrounding rock stress detection method and device and electronic equipment |
| CN114046914B (en) * | 2021-10-25 | 2022-07-26 | 煤炭科学研究总院有限公司 | Surrounding rock stress detection method and device and electronic equipment |
| CN114353750A (en) * | 2022-01-12 | 2022-04-15 | 中国路桥工程有限责任公司 | Omnidirectional tunnel section settlement monitoring device |
| CN115615347A (en) * | 2022-12-20 | 2023-01-17 | 清华大学 | Superconducting coil strain monitoring device based on distributed optical fiber |
| CN115615347B (en) * | 2022-12-20 | 2023-04-14 | 清华大学 | Superconducting coil strain monitoring device based on distributed optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103454021B (en) | 2015-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103454021B (en) | Roadway surrounding rock stress monitoring device based on fiber bragg grating sensing | |
| CN103454020B (en) | Surrounding rock stress on-line monitoring system and method based on fiber bragg grating borehole stress meter | |
| CN203259281U (en) | Coal mine downhole optical fiber raster multi-measuring point anchor pole stress measuring device | |
| CN103362552B (en) | Distributed optical fiber grating anchor rod group stress monitoring system for coal mine roadway | |
| CN103364104B (en) | System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface | |
| CN102798492A (en) | Fiber bragg grating detection system device and method for detecting anchoring force of anchor rod | |
| CN103528731B (en) | A kind of coal mine paste filling on-line monitoring system based on optical fiber grating sensing | |
| CN103527248B (en) | Based on coal mine roof plate water barrier Stability Monitoring System and the method for fiber grating | |
| CN102809454A (en) | FBG (Fiber Bragg Grating) force measuring anchor rod and using method | |
| CN107367231A (en) | Coal mine work area wall caving monitoring system based on fiber grating and 3 D laser scanning | |
| CN103556992B (en) | A kind of acquisition methods of fiber grating geostatic stress | |
| CN103821507A (en) | Method for detecting deformation of shaft wall of vertical shaft through distributed optical fibers | |
| CN102720515A (en) | Fiber bragg grating prestress measurement anchor rod and application method thereof | |
| CN104454007A (en) | Mine safety early warning system based on multi-fiber-core optical fibers | |
| CN103994846A (en) | Device and method for testing surrounding rock stress field distribution | |
| CN103528732A (en) | Coal mine goaf top plate strain monitoring system and method based on fiber bragg grating sensing | |
| CN105888651A (en) | Mining online pressure-measuring device based on optical fiber | |
| CN203642880U (en) | Fiber bragg grating distributed displacement sensor monitoring inner deformation of side slope | |
| CN103528749B (en) | Based on coal mine tunnel top board hydraulic pressure on-line monitoring system and the method for fiber grating | |
| Tang et al. | Application of a FBG-based instrumented rock bolt in a TBM-excavated coal mine roadway | |
| CN202693170U (en) | Fiber Bragg grating pre-stressed force-measuring rock bolt | |
| CN103743357A (en) | Fiber bragg grating separation layer device for monitoring deformation of rock roof | |
| CN104569351B (en) | A kind of Fibre Optical Sensor laying apparatus for analog simulation and laying method | |
| CN201561828U (en) | Fiber grating geological disaster monitor | |
| CN106441653B (en) | A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Fang Xinqiu Inventor after: Liang Minfu Inventor after: Xing Xiaopeng Inventor after: Tang Hualin Inventor after: Li Cong Inventor after: He Zhiqiang Inventor after: Liu Xiaoning Inventor before: Fang Xinqiu Inventor before: Liu Xiaoning Inventor before: Liang Minfu |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: FANG XINQIU LIU XIAONING LIANG MINFU TO: FANG XINQIU LIANG MINFU XING XIAOPENG TANG HUALIN LI CONG HE ZHIQIANG LIU XIAONING |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |