AU2017204543B2 - System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method - Google Patents
System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method Download PDFInfo
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- 238000000926 separation method Methods 0.000 title claims abstract description 114
- 239000000835 fiber Substances 0.000 title claims abstract description 93
- 238000012544 monitoring process Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 239000011435 rock Substances 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000013307 optical fiber Substances 0.000 claims description 59
- 238000012806 monitoring device Methods 0.000 claims description 34
- 230000008093 supporting effect Effects 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 27
- 239000003245 coal Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
A system for dynamically monitoring roadway roof separation based on a fibre grating and a pre warning method, which belongs to the field of mine safety monitoring. Three parts, i.e., a ground data processing and control sub-system, a downhole data transmission communication sub-system and a downhole sensing data collecting sub-system are comprised: the ground data processing and control sub-system is placed in a ground control centre room, and is composed of a ground upper master monitoring computer, a fibre grating demodulation apparatus and a power supply; the downhole data transmission communication sub-system is composed of a mining transmission fibre and a fibre junction box; and the downhole sensing data collecting sub-system comprises at least one apparatus for monitoring fibre grating roof separation. The real-time online dynamic consecutive measurement of roof separation is realized, a transformation circumstance of a roadway surrounding rock is obtained, and the rationality of a bolting support parameter is verified. Once the pre-warning threshold of separation is exceeded, a pre-warning signal can be sent correctly, so that measures can be taken in time, and roof collapse can be prevented, which is of great importance for the outer roof separation size and the roadway stability in an anchorage zone.
Description
System for Dynamically Monitoring Roadway Roof Separation Based on Fibre Grating and Pre-warning Method
Field of the Invention
In preferred forms, the present invention relates to a monitoring system and a prewarning method for roadway roof separation, in particular to a fiber grating based dynamically monitoring system and a pre-waming method for roadway roof separation.
Background to the Invention
In the production in coal mines, separation will happen when the surrounding rocks of roadway is under the tensioning and shearing action of an external force; particularly, roof separation may occur more easily in roadways supported by bolt. Roof separation is one of the main deformation and damage forms of surrounding rocks of roadway. Once roof separation goes beyond a certain range, the roof will be in an unstable state, and may result in severe roof accidents such as roof caving if no shoring measures are taken timely. Such accidents have direct impacts on personal safety of the workers and normal production in the coal mine. Therefore, for a roadway supported by bolt, roof separation must be monitored in real time to learn about the reasonableness of the setting of bolt supporting parameters, stability of the roof, and development of fractures in the overlying strata of the roadway roof, so as to effectively prevent the occurrence of roof collapse accidents and ensure safe production in the coal mine.
At present, most roof separation monitoring devices commonly used in the underground areas of coal mines in China are mechanical roadway roof separation indicators or roadway roof separation indicators that utilize electrical elements to give off audible and visual alarms. The existing roof separation monitoring systems include Zigbeebased and CAN bus-based dynamic roof monitoring systems for coal mines and IMBUS based roof separation monitoring systems.
Though those monitoring means have active effects for preventing roof falling, they have the following drawbacks: all of the monitoring devices depend on periodical manual observation and measurement of roof separation, which involves inconvenience in reading in underground areas and severe human error in reading owing to the limitation of underground roadway conditions and lighting intensity; the monitoring system employs a single-chip microcomputer as the controller, which has low measuring accuracy, low resistance to electromagnetic interference, high susceptibility to environmental influences, narrow measuring range, low reliability, and poor effect of dynamic and continuous monitoring of roadway roof separation; in addition, the system can't provide pre-wamings against the occurrence of roof separation, and has severe impacts on the safety and reliability of roadway and mining work.
Whilst a background to the invention has been provided, it is to be recognised that any discussion in the present specification is intended to explain the context of the present invention. It is not to be taken as an admission that the material discussed formed part of the prior art base or relevant general knowledge in any particular country or region.
2017204543 03 Jul 2017
Summary of the Invention
According to a first aspect of embodiment herein described there is provided a fiber grating-based dynamic roadway roof separation monitoring system, comprising a ground data processing and controlling subsystem, an underground data transmission and communication subsystem, and an underground sensing data acquisition subsystem, the ground data processing and controlling subsystem is disposed in a ground control center room, and comprises a ground upper main monitoring computer, a fiber grating demodulator, and a power supply unit that provides rated power for the ground upper main monitoring computer and the fiber grating demodulator; the underground data transmission and communication subsystem comprises a transmission optical fiber for mines and optical fiber junction boxes, wherein, a series of optical fiber junction boxes are connected in series on the transmission optical fiber for mines; the underground sensing data acquisition subsystem comprises at least one fiber grating-based roof separation monitoring device, which is connected via an optical fiber pigtail to the optical fiber junction box; the fiber grating-based roof separation monitoring devices in the underground sensing data acquisition subsystem are connected via respective optical fiber pigtails and optical fiber junction boxes to the transmission optical fiber for mines, the transmission optical fiber for mines is connected to the fiber grating demodulator in the ground control center room, and the fiber grating demodulator is connected to the ground upper main monitoring computer; thus, a remote dynamic roadway roof separation monitoring system in which the ground part and the underground part of the monitoring system communicates with each other is formed.
Preferably the ground upper main monitoring computer has built-in roof separation data analysis and processing software.
Preferably there is provided a pre-warning method that utilizes the fiber grating-based dynamic roof separation monitoring system according to claim 1, comprising prewarning, installation, and monitoring methods, wherein, the pre-warning method comprises the following steps:
A. firstly, utilizing the power supply unit to supply power to the ground upper main monitoring computer and the fiber grating demodulator and warm up the fiber grating demodulator for three minutes, so that the fiber grating demodulator enter into a ready state;
B. secondly, setting IP addresses, so that the ground upper main monitoring computer and the fiber grating demodulator operates in the same address domain and can transmit data accurately to each other;
C. thirdly, initially setting the system, to set a constant pre-warning threshold for roof separation displacement data and record the raw data of roof separation displacement;
D. fourthly, acquiring roof separation displacement data via the fiber grating3
2017204543 03 Jul 2017 based roof separation monitoring devices, and judging whether the prewarning level is reached by comparing the real-time displacement data with the set constant warning threshold automatically;
E. finally, if no pre-warning occurs, it indicates the separation displacement is within the controllable range of roof stability; if any pre-warning occurs, recording and storing the pre-waming time, magnitude of separation displacement, and position of roof separation, and taking effective protective measures at the same time, to prevent roof collapse and ensure safe production in the coal mine;
with respect to the installation and monitoring methods, the fiber grating-based roof separation monitoring device can be installed and carry out monitoring in the following way:
A. mounting optical fiber junction boxes on either side of the roadway, and drilling a hole to predefined depth with a drill bit having a diameter of 3540mm in the roadway roof near a roof supporting bolt;
B. arranging a shallow measuring point and a deep measuring point in the hole, wherein, the shallow measuring point is arranged at a position that is at the same height as the upper end of the roof supporting bolt, while the deep measuring point is arranged in a stable rock formation at the upper end of the hole;
C. pushing a deep anchor to the deep measuring point with a mounting pole having a groove on one end, pushing a shallow anchor to the shallow measuring point, and pulling a steel wire rope, to ensure the anchor is anchored in the rock formation;
D. connecting an optical fiber pigtail exposed in the roadway to an optical fiber junction box after installation, so that the fiber grating-based roof separation monitoring device can detect the variation of roof separation displacement.
In order to assist with providing safe and efficient production in the underground areas in coal mines, provides, various embodiments of the present invention may assist with providing: a fiber grating based dynamic roadway roof separation monitoring system, which is relatively safe intrinsically, has high resistance to electromagnetic interference, low susceptibility to environmental influences, high reliability, high measuring accuracy, can provide pre-warnings and alarms timely on the basis of roof separation data, and can carry out automatic monitoring and real-time online dynamic continuous monitoring, as well as a pre-waming method thereof.
Various embodiments of the present invention employ the following technical scheme: a fiber grating-based dynamic roadway roof separation monitoring system, comprising a ground data processing and controlling subsystem, an underground data transmission
2017204543 03 Jul 2017 and communication subsystem, and an underground sensing data acquisition subsystem, wherein, the ground data processing and controlling subsystem is disposed in a ground control center room, and comprises a ground upper main monitoring computer, a fiber grating demodulator, and a power supply unit that provides rated power supply for the ground upper main monitoring computer and the fiber grating demodulator; the underground data transmission and communication subsystem comprises a transmission optical fiber for mines and optical fiber junction boxes, wherein, a series of optical fiber junction boxes are connected in series on the transmission optical fiber for mines; the underground sensing data acquisition subsystem comprises at least one fiber grating-based roof separation monitoring device, which is connected via an optical fiber pigtail to an optical fiber junction box; the fiber grating-based roof separation monitoring devices in the underground sensing data acquisition subsystem are connected via respective optical fiber pigtails and optical fiber junction boxes to the transmission optical fiber for mines, the transmission optical fiber for mines is connected to the fiber grating demodulator in the ground control center room, and the fiber grating demodulator is connected to the ground upper main monitoring computer; thus, a remote dynamic roadway roof separation monitoring system in which the ground part and the underground part of the monitoring system communicate with each other is formed.
The communication between the ground part and the underground part of the monitoring system can be: the fiber grating-based roof separation monitoring devices in the underground sensing data acquisition subsystem transmit acquired wavelength information data of roof separation through the optical fiber pigtails and optical fiber junction boxes to the transmission optical fiber for mines, and then the data is transmitted through the transmission optical fiber for mines by wire communication method to the fiber grating demodulator in the ground control center room; the fiber grating demodulator demodulates the wavelength information data into digital signal data, and then transmits the digital data by network cable communication method to the ground upper main monitoring computer; the ground upper main monitoring computer post-processes the data, and feeds back the data to the underground area timely; thus, communication between the ground part and the underground part is realized.
The ground upper main monitoring computer has built-in roof separation data analysis and processing software.
The fiber grating-based roof separation monitoring device can be installed and carry out monitoring through the following steps:
A. mounting an optical fiber junction box on either side of the roadway, and drilling a hole having a depth of 6-8m with a drill bit having a diameter of 35-40mm in the roadway roof near a roof supporting bolt;
B. arranging a shallow measuring point and a deep measuring point inside the hole, wherein, the shallow measuring point is arranged at a position that is at the same height as the upper end of the roof supporting bolt, while the deep measuring
2017204543 03 Jul 2017 point is arranged in a stable rock formation at the upper end of the hole;
C. pushing a deep anchor to the deep measuring point with a mounting pole with a groove on one end, pushing a shallow anchor to the shallow measuring point, and pulling a steel wire rope slightly, to ensure the anchor is anchored in the rock formation;
D. connecting an optical fiber pigtail exposed in the roadway to an optical fiber junction box after the installation, so that the fiber grating-based roof separation monitoring device can detect the variation of roof separation displacement.
A pre-warning method that utilizes the fiber grating-based dynamic roof separation monitoring system described above, comprising the following steps:
A. firstly, utilizing the power supply unit to supply power to the ground upper main monitoring computer and the fiber grating demodulator and per-warm up the fiber grating demodulator for three minutes, so that the fiber grating demodulator enter into a ready state;
B. secondly, setting IP addresses, so that the ground upper main monitoring computer and the fiber grating demodulator operates in the same address domain and can transmit data accurately to each other;
C. thirdly, initially setting the system, to set a constant pre-warning threshold for roof separation displacement data and record the raw data of roof separation displacement;
D. fourthly, acquiring roof separation displacement data in real time via the fiber grating-based roof separation monitoring devices, and judging whether the prewarning level has reached by comparing the real-time displacement data with the set constant pre-warning threshold automatically;
E. finally, if no pre-warning occurs, it indicates the separation displacement is within the controllable range of roof stability; if any warning occurs, recording and storing the warning time, magnitude of separation displacement, and position of roof separation, and taking effective protective measures at the same time, to prevent roof collapse and ensure safe production in the coal mine.
In operation with the technical scheme described above, after roadway excavation, the surrounding rocks may deform and result in separation of the shallow rock formation from the deep rock formation and settlement of the roof. Two measuring points are arranged in a hole in the roof: a shallow measuring point and a deep measuring point, wherein, the shallow measuring point is arranged at a position that is at the same height as the upper end of a roof supporting bolt, while the deep measuring point is arranged in the stable deep surrounding rock; an anchor is arranged at each measuring point and is anchored in the roof rock formation. In embodiments of the present invention, the roof separation of a roadway supported by bolt is measured in an indirect method. When roof separation occurs, the anchor of the fiber grating-based roof separation monitoring
2017204543 03 Jul 2017 device will synchronously move with the roof rock formation, and consequently the fiber grating in the fiber grating-based roof separation monitoring device will have strain and the central wavelength of the fiber grating will drift, the wavelength signal is demodulated into a digital signal by an optical fiber demodulator and transmitted to a ground upper main monitoring computer, so as to display the variation of roof separation data dynamically in real time, and give off a pre-warning once the separation displacement data exceeds a set pre-warning threshold, so that appropriate measures can be taken timely and effectively to prevent roof collapse due to lost of stability. The application of this technique is of great significance for measuring the magnitude of roof separation inside and outside an anchoring area in a roadway supported by anchor bolts, evaluating bolt supporting effect and roadway safety level, and avoiding occurrence of accidental damages.
In embodiments of the present invention various advantages may be provided. In various embodiments of the present invention:
1. The fiber grating has a highly sensitive sensing characteristic, and can measure very small variation of separation displacement.
2. The fiber grating-based roof separation monitoring device utilizes core fiber grating techniques, an fiber grating has intrinsic safety and can operate passively, achieve convenient and flexible direct data acquisition in an underground area, and has a high anti-electromagnetic interference property; in addition, signal transmission through an optical fiber supports long transmission distance, has high reliability, and supports a wide measuring range.
3. There is automatic monitoring and real-time online dynamic and continuous measurement of roof separation, and the magnitude of roof separation displacement can be calculated from fiber grating wavelength change.
4. Embodiments can obtain the information on deformation of surrounding rocks of a roadway timely and verify whether the bolt supporting parameters are reasonable. Once the system detects that the deformation of surrounding rock goes beyond a pre-waming threshold, it can accurately and conveniently give off a pre-warning signal, so that appropriate measures can be taken timely and the original supporting parameters can be corrected, to ensure safe production in the coal mine and provide guidance for roadway support design and construction.
5. The system can store the separation monitoring data automatically and supports analysis and study on the monitored separation displacement data under the same surrounding rock conditions, so as to investigate the roof rock deformation rules and provide a basis for safe construction and design of roadways with complex and varying surrounding rock conditions.
It is to be recognised that other forms and advantages of the preferred embodiments will be apparent from the drawings and description of preferred embodiments, and the claims provided below.
2017204543 03 Jul 2017
Further advantages and preferred features will be apparent from the drawings and a reading of the specification as a whole.
Brief Description of Drawings
In order to facilitate a better understanding of the present invention, several preferred embodiments will now be described with reference to the accompanying Figures detailed below.
Fig.l is a structure diagram of general layout of the monitoring system according to a preferred embodiment of the present invention;
Fig.2 is an installation diagram of a fiber grating-based roof separation monitoring device according to a preferred embodiment of the present invention;
Fig. 3 is a diagram for the arrangement points of fiber grating-based roof separation monitoring devices of an entire roadway according to a preferred embodiment of the present invention.
Detailed Description of the Drawings
It is to be appreciated that each of the embodiments is specifically described and that the present invention is not to be construed as being limited to any specific feature or element of any one of the embodiments. Neither is the present invention to be construed as being limited to any feature of a number of the embodiments or variations described in relation to the embodiments.
Among the drawings the features are numbered as follows: 1 - ground data processing and controlling subsystem; 2 - underground data transmission and communication subsystem; 3 - underground sensing data acquisition subsystem; 4 - ground upper main monitoring computer; 5 - fiber grating demodulator; 6 - power supply unit; 7 transmission optical fiber for mines; 8 - optical fiber junction box; 9 - optical fiber pigtail; 10 - fiber grating-based roof separation monitoring device, 11 - ground control center room; 12 - roadway; 13 - roof supporting bolt; 14 - hole ;15 - shallow measuring point; 16 - deep measuring point; 17 - shallow anchor; 18 - deep anchor; 19 - steel wire rope; 20 - working face; 21 - mined-out area; 22 - air return roadway; 23 - air intake roadway.
Example 1: Fig. 1 shows a fiber grating-based dynamic roadway roof separation monitoring system, comprising a ground data processing and controlling subsystem 1, an underground data transmission and communication subsystem 2, and an underground sensing data acquisition subsystem 3, wherein, the ground data processing and controlling subsystem 1 is disposed in a ground control center room 11, and comprises a ground upper main monitoring computer 4, a fiber grating demodulator 5, and a power supply unit 6 that provides rated power for the ground upper main monitoring computer 4 and the fiber grating demodulator 5; the underground data transmission and communication subsystem 2 comprises a transmission optical fiber
2017204543 03 Jul 2017 for mines 7 and optical fiber junction boxes 8, wherein, a series of optical fiber junction boxes 8 are connected in series on the transmission optical fiber for mines; the underground sensing data acquisition subsystem 3 comprises at least one fiber gratingbased roof separation monitoring device 10, and the fiber grating-based roof separation monitoring device 10 is connected to an optical fiber junction box 8 via an optical fiber pigtail 9.
The communication between the ground part and the underground part of the monitoring system is: the fiber grating-based roof separation monitoring devices 10 in the underground sensing data acquisition subsystem 3 are connected to the transmission optical fiber for mines 7 via respective optical fiber pigtails 9 and optical fiber junction boxes 8, and transmit acquired monitoring wavelength information data of roof separation to the transmission optical fiber for mines 7; the transmission optical fiber for mines 7 is connected to the fiber grating demodulator 5 in the ground control center room 11, and the transmission optical fiber for mines 7 transmits the data in a cable communication approach to the fiber grating demodulator 5 in the ground control center room 11; the fiber grating demodulator 5 is connected to the ground upper main monitoring computer 4, and the fiber grating demodulator 5 demodulates the wavelength information data into digital signal data, and then transmits the digital signal data through a network cable communication approach to the ground upper main monitoring computer 4; the ground upper main monitoring computer 4 post-processes the data, and feeds back the processed data to the underground area timely; thus, communication between the ground part and the underground part is realized, and a remote dynamic roadway roof separation monitoring system in which the ground part and the underground part communicate with each other is formed.
Fig. 2 is an installation layout diagram of the fiber grating-based roof separation monitoring device. The fiber grating-based roof separation monitoring device can be installed and carry out monitoring in the following way:
A. mounting optical fiber junction boxes 8 on either side of the roadway 12, and drilling a hole 14 to predefined depth with a drill bit in 3 5-40mm diameter in the roof of the roadway 12 near a roof supporting bolt 13;
B. arranging a shallow measuring point 15 and a deep measuring point 16 in the hole 14, wherein, the shallow measuring point 15 is arranged at a position that is at the same height as the upper end of the roof supporting bolt 13, while the deep measuring point 16 is arranged in a stable rock formation at the upper end of the hole 14;
C. pushing a deep anchor 18 to the deep measuring point 16 with a mounting pole with a groove on one end, pushing a shallow anchor 17 to the shallow measuring point 15, and pulling a steel wire rope 19, to ensure the anchor is anchored in the rock formation;
D. connecting an optical fiber pigtail 9 exposed in the roadway 12 to an optical fiber junction box 8 after installation, so that the fiber grating-based roof separation
2017204543 03 Jul 2017 monitoring device can detect the variation of roof separation displacement.
Fig. 3 is a diagram for the arrangement points of fiber grating-based roof separation monitoring devices in the entire roadway. In the air return roadway 22 and air intake roadway 23 at a distance of 120m to the upper end and lower end of a working face 20, measuring points are arranged at a distance of 50m, and fiber grating-based roof separation monitoring devices are deployed in the measuring points, and are connected via optical fiber junction boxes and the transmission optical fiber for mines in sequence to form a monitoring network, so that the roof separation displacement at different positions to the coal walls of the working face in the roadway can be monitored and recorded dynamically in real time, and the variation of supporting pressure can be analyzed, to ensure safety and stability of the roadway supported by bolt.
The data processing process and pre-warning method comprises the following steps:
A. firstly, utilizing the power supply unit to supply power to the ground upper main monitoring computer and the fiber grating demodulator and warm up the fiber grating demodulator for three minutes, so that the fiber grating demodulator enter into a ready state;
B. secondly, setting IP addresses, so that the ground upper main monitoring computer and the fiber grating demodulator operates in the same address domain and can transmit data accurately to each other;
C. thirdly, initially setting the system, to set a constant pre-warning threshold for roof separation displacement data and record the raw data of roof separation displacement;
D. fourthly, acquiring roof separation displacement data via the fiber grating-based roof separation monitoring devices, and judging whether the pre-waming level is reached by comparing the real-time displacement data with the set constant prewarning threshold automatically;
E. finally, if no pre-warning occurs, it indicates the separation displacement is within the controllable range of roof stability; if any pre-warning occurs, recording and storing the pre-waming time, magnitude of separation displacement, and position of roof separation, and taking effective protective measures at the same time, to prevent roof collapse and ensure safe production in the coal mine.
Various embodiments of the present invention provide a fiber grating-based dynamic roadway roof separation monitoring system and a pre-warning method thereof, the system realizes automatic monitoring and real-time online dynamic and continuous measurement of roof separation; the system employs fiber gratings, which has a highly sensitive sensing characteristic, has intrinsic safety, supports direct data acquisition in an underground area, and has a high anti-electromagnetic interference property; the system utilizes optical fibers for signal transmission, which supports a long transmission distance, has high reliability, and supports a wide measuring range; the system and method can be used to obtain the deformation information of surrounding
2017204543 03 Jul 2017 rocks of the roadway timely and verify whether the bolt supporting parameters are reasonable, once the system detects that the deformation of the surrounding rock goes beyond a set pre-warning threshold, it can give off a pre-warning signal accurately and conveniently, so that appropriate measures can be taken timely, and the original supporting parameters can be corrected, the pre-warning method is accurate and convenient; the monitored separation data can be stored automatically, so that analysis and study on the monitored separation displacement data can be carried out under the same surrounding rock conditions, so as to investigate deformation rules of roof surrounding rock and provide a basis for safe construction and design of roadways with complex and volatile surrounding rock conditions, the system and method provided in the present specification are of great significance for safe construction and stability of roadways supported by bolt.
In the present specification, the presence of particular features does not preclude the existence of further features. The words ‘comprising’, ‘including’, ‘or’ and ‘having’ are to be construed in an inclusive rather than an exclusive sense.
In the present specification, the presence of particular features does not preclude the existence of further features. The words ‘comprising’, ‘including’, ‘or’ and ‘having’ are to be construed in an inclusive rather than an exclusive sense.
2017204543 20 Feb 2019
Claims (6)
1. A fiber grating-based dynamic roadway roof separation monitoring system, said fiber grating-based dynamic roadway roof separation monitoring system including:
a ground data processing and controlling subsystem, an underground data transmission and communication subsystem, and an underground sensing data acquisition subsystem wherein the underground data transmission and communication subsystem includes a series of optical fiber junction boxes connected in series, wherein each optical fiber junction box of the series of optical fiber junction boxes is in communication with a corresponding fiber grating-based roof separation monitoring device; and wherein each fiber grating-based roof separation monitoring device is anchored firstly within rock bedding along roadway roofing adjacent a corresponding roof support bolt at a shallow measuring point of the fiber grating-based roof separation monitoring device, wherein the shallow measuring point is defined as a height of an upper end of said corresponding roof support bolt, and wherein each fiber grating-based roof separation monitoring device is anchored secondly at a deep measuring point of the fiber grating-based roof separation monitoring device, wherein the deep measuring point is defined within a stable rock formation above the roadway.
2. The fiber grating-based dynamic roadway roof separation monitoring system of claim
1 wherein each optical fiber junction box of the series of optical fiber junction boxes connected in series are mountable to a side of the roadway.
3. The fiber grating-based dynamic roadway roof separation monitoring system of claim
2 wherein each optical fiber junction box mounted to the side of the roadway is in communication with the corresponding fiber grating-based roof separation monitoring device wherein the corresponding fiber grating-based roof separation monitoring device anchored firstly and anchored secondly is within a predefined drilled hole between a ground surface to a roadway roof adjacent a corresponding roof supporting bolt.
2017204543 20 Feb 2019
4. The fiber grating-based dynamic roadway roof separation monitoring system of claim 3 wherein the anchored secondly at the deep measuring point is completed with a mounting pole having a groove at one end.
5. The fiber grating-based dynamic roadway roof separation monitoring system of any one of claims 1 to 4 wherein the ground data processing and controlling subsystem is disposed in a ground control center room, and includes a ground upper main monitoring computer, a fiber grating demodulator, and a power supply unit that provides rated power for the ground upper main monitoring computer and the fiber grating demodulator.
6. The fiber grating-based dynamic roadway roof separation monitoring system of claim 5 wherein the ground upper main monitoring computer has built-in roof separation data analysis and processing software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310508458.3A CN103510986B (en) | 2013-10-25 | 2013-10-25 | Tunnel roof separation dynamic monitoring system based on fiber bragg grating and early-warning method thereof |
| CN201310508458.3 | 2013-10-25 | ||
| PCT/CN2014/074081 WO2015058487A1 (en) | 2013-10-25 | 2014-03-26 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
| AU2014339681A AU2014339681A1 (en) | 2013-10-25 | 2014-03-26 | 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 |
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| AU2014339681A Division AU2014339681A1 (en) | 2013-10-25 | 2014-03-26 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
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| AU2017204543A1 AU2017204543A1 (en) | 2017-07-27 |
| AU2017204543B2 true AU2017204543B2 (en) | 2019-04-18 |
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| AU2014339681A Abandoned AU2014339681A1 (en) | 2013-10-25 | 2014-03-26 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
| AU2017204543A Active AU2017204543B2 (en) | 2013-10-25 | 2017-07-03 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
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| AU2014339681A Abandoned AU2014339681A1 (en) | 2013-10-25 | 2014-03-26 | System for dynamically monitoring roadway roof separation based on fibre grating and pre-warning method |
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| CN (1) | CN103510986B (en) |
| AU (2) | AU2014339681A1 (en) |
| RU (1) | RU2630334C2 (en) |
| WO (1) | WO2015058487A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510986B (en) * | 2013-10-25 | 2015-05-20 | 中国矿业大学 | Tunnel roof separation dynamic monitoring system based on fiber bragg grating and early-warning method thereof |
| 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 |
| CN104454007B (en) * | 2014-10-15 | 2016-08-24 | 中国科学院合肥物质科学研究院 | A kind of coal mine safety prewarning system based on multicore fiber |
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| CN106017332A (en) * | 2016-07-14 | 2016-10-12 | 黑龙江科技大学 | Roadway surrounding rock surface relative displacement monitoring system and method |
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| CN103510986A (en) | 2014-01-15 |
| RU2630334C2 (en) | 2017-09-07 |
| WO2015058487A1 (en) | 2015-04-30 |
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| CN103510986B (en) | 2015-05-20 |
| RU2016104531A (en) | 2017-08-15 |
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| AU2014339681A1 (en) | 2016-01-28 |
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