CN107328503A - Coal mine tunnel top board Stress On-Line system and method based on fiber-optic grating sensor - Google Patents
Coal mine tunnel top board Stress On-Line system and method based on fiber-optic grating sensor Download PDFInfo
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- CN107328503A CN107328503A CN201710561839.6A CN201710561839A CN107328503A CN 107328503 A CN107328503 A CN 107328503A CN 201710561839 A CN201710561839 A CN 201710561839A CN 107328503 A CN107328503 A CN 107328503A
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- 239000003245 coal Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 80
- 239000013307 optical fiber Substances 0.000 claims abstract description 71
- 239000000835 fiber Substances 0.000 claims abstract description 59
- 238000012806 monitoring device Methods 0.000 claims abstract description 49
- 230000003068 static effect Effects 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000005065 mining Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000004458 analytical method Methods 0.000 abstract description 2
- 208000035126 Facies Diseases 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000586 desensitisation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/247—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet using distributed sensing elements, e.g. microcapsules
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
Abstract
A kind of coal mine tunnel top board Stress On-Line system and method based on fiber-optic grating sensor, it is adaptable to which strata behavior analysis of roadway monitoring field is used.Coal mine tunnel top board Stress On-Line system based on fiber-optic grating sensor, including the monitoring survey station being arranged on the back of coal-face both sides, each monitoring survey station includes three roof Stress monitoring devices, it is cascaded between roof Stress monitoring device in each monitoring survey station by communication optical fiber, the exit optical fiber pigtail of the monitoring survey station of each tunnel tail end is connected by communication optical fiber with optical fiber terminal box, optical fiber terminal box is connected by mining transmission cable with the static (FBG) demodulator of the fiber grating for being arranged on earth's surface, fiber grating static state (FBG) demodulator is linked in sequence and has monitoring cyber-net server, the webserver is connected by colliery LAN with multiple client；Its measurement accuracy is high, service life is long, and coal mine tunnel top board stress real time on-line monitoring can be achieved.
Description
Technical field
The present invention relates to a kind of monitoring system and method, it is especially a kind of suitable for strata behavior analysis of roadway monitor field based on light
The coal mine tunnel top board Stress On-Line system and method for fiber grating sensor.
Background technology
With being continuously increased for China's coal-mine mining depth, the stress variation of back and goaf top plate is increasingly
Thousands of of the roof accident of causing death occurs for complexity, nearly ten years, domestic colliery, accounts for coal mining accident sum close to half, because
This monitors coal mine tunnel top board stress variation in real time, judges the stability of top plate, effective safeguard procedures are taken in time, to prevention
The roof accident taken place frequently is of great immediate significance.
The sensing principle of original fiber grating force-measuring anchor stock is related after the stretched strain of force-measuring anchor stock is attached to thereon
Grating is strained together, that is, requires that force-measuring anchor stock has much strains, grating also has much strains, and actual conditions are force-measuring anchor stocks
Maximum elongation percentage is 17%, and the maximum elongation percentage of fiber grating is 0.3%, once the strain of force-measuring anchor stock is more than 0.3%, no
But do not reach the purpose of dynamometry, the consequence that can also cause fiber grating to damage, even if some desensitization measures such as spring are employed, but
It is also found that during actual installation and is difficult to solve this problem.
Present in existing fiber grating force-measuring anchor stock：Fiber grating strain is difficult to coordinate in effective range with anchor pole strain
Defect, i.e. anchor pole strain facies is excessive for fiber grating and cause that fiber grating is pulled off or measurement result is inaccurate
Really.
The content of the invention
Technical problem：The invention aims to overcome deficiency of the prior art, there is provided a kind of simple in construction, installation
Convenient, reliability is high, measurement accuracy is high, anti-electromagnetic interference capability is strong, it is affected by environment it is small, without potential safety hazard, signal transmission distance
It is online from the coal mine tunnel top board stress based on fiber-optic grating sensor that is remote, can in real time being monitored to back stress
Monitoring system and monitoring method.
Technical scheme：The coal mine tunnel top board Stress On-Line system based on fiber-optic grating sensor of the present invention, bag
Include the monitoring survey station being arranged on the back of coal-face both sides, be serially connected between monitoring survey station until goaf, often
Individual monitoring survey station is included between three roof Stress monitoring devices, each roof Stress monitoring device monitored in survey station by logical
News optical fiber is cascaded, and the exit optical fiber pigtail of the monitoring survey station of each tunnel tail end passes through communication optical fiber and fibre-optic terminus
Box is connected, and optical fiber terminal box is connected by mining transmission cable with the static (FBG) demodulator of the fiber grating for being arranged on earth's surface, light
The static (FBG) demodulator of fine grating, which is linked in sequence, monitoring cyber-net server, the webserver by colliery LAN with it is many
Individual client is connected；
The roof Stress monitoring device includes hollow anchor bar, and hollow anchor bar two ends are respectively equipped with the hollow bolt linked closely,
Steel wire rope is provided with hollow anchor bar, steel wire rope is fixed on hollow anchor bar after being stretched by the hollow bolt at anchor pole two ends, hollow
The bolt part of bolt is provided with the symmetrical groove of twice, corresponding with groove on the head of hollow bolt to go out to lead provided with two optical fiber
Portal, fiber-optic grating sensor is provided with the groove of hollow bolt, fiber-optic grating sensor tail end is drawn by optical fiber fairlead
Optical fiber, symmetrical two fiber-optic grating sensors of arrangement of pasting are easy to calibrating (base measuring) pressure value；
Each fiber-optic grating sensor is connected by communication optical fiber with optical fiber terminal box, and optical fiber terminal box is passed by mining
Cable is lost with the fiber Bragg grating (FBG) demodulator on well to be connected.
The hollow anchor bar length is 2000mm, a diameter of 25mm of hollow anchor bar.
The diameter of bore of described hollow bolt is that 6mm, apparent diameter are 10mm, a length of 40mm, the head of hollow bolt
A diameter of 25mm, a length of 10mm.
The roof Stress monitoring device arranged for interval, every 50 meters are arranged a roof Stress monitoring device on top plate,
Each roof Stress monitoring device is provided with two fiber-optic grating sensors.
A kind of coal mine tunnel top board stress online test method based on fiber-optic grating sensor, comprises the following steps：
A, installation roof Stress monitoring device：Fiber-optic grating sensor is close on the groove of hollow bolt, and passed through
Optical fiber fairlead draws optical fiber, and two hollow bolts then are held in into hollow anchor bar two ends, seizing wire is stretched through whole
Individual hollow anchor bar, completes the roof Stress monitoring device；
B, the arrangement monitoring survey station in tunnel, 3 roof Stress monitoring devices of top plate arranged for interval in monitoring survey station,
The spacing distance of roof Stress monitoring device is 50 meters, is passed the fiber grating in roof Stress monitoring device by optical fiber pigtail
Sensor is cascaded, and is pushed ahead along tunnel, and monitoring survey station spacing distance lays next monitoring survey station when being 20 meters, directly
To the monitoring survey station number for completing setting；
C, using communication optical fiber optical fiber pigtail is connected with optical fiber terminal box, and is connected to ground by mining transmission cable
On the static (FBG) demodulator of fiber grating on face, fiber grating static state (FBG) demodulator is connected with monitoring computer；
D, sink when somewhere back, after roof Stress changes, the anchor rod body of roof Stress monitoring device hair
Raw stretcher strain, because the seizing wire in roof Stress monitoring device is fixed by the hollow bolt at two ends at two ends
Firmly, so the stretcher strain of anchor rod body also causes seizing wire therein to draw tighter, so that being pasted with fiber grating biography
The hollow bolt of that one end of sensor causes compression, and the fiber-optic grating sensor being then pasted onto on hollow bolt can be produced
The lightwave signal of contraction distortion；
E, if seizing wire is deformed upon need not more change steel rope, in the event of fracture then need more change steel rope
Or a new roof Stress monitoring device is changed, occur absciss layer to the optional position of back vertical direction or sink to becoming
The stress of shape detected, the dangerous critical data by the data that detect with prestoring is compared, and reaches the effect of monitoring and warning.
E, the lightwave signal for gathering fiber-optic grating sensor are transmitted to fiber grating static state by FIBER OPTIC FIBERS ＆ CABLE and demodulated
Instrument, is demodulated into data signal by lightwave signal by the static (FBG) demodulator of fiber grating, is then transmit to monitoring computer, passes through peace
Online-monitoring software mounted in monitoring computer carries out data processing, passes through the data detected and the dangerous critical data prestored
Compare, in real time display back stress data and variation tendency；
F, by colliery LAN and the webserver, the back stress data of monitoring is shared, realize pair
The online real-time remote monitoring of back stress.
Beneficial effect：As a result of such scheme, the present invention changes traditional stretching grating device for measuring force monitoring top
The method of plate stress, using the monitoring method of Compressed grating, fiber grating is not easy to be pulled off, measurement accuracy is high, service life
It is long.Coal mine tunnel top board Stress On-Line system based on fiber-optic grating sensor, is changed in conventional device design not
Foot, fiber grating on-line monitoring system transmission capacity is big, and transmission range is wide, and electromagnetism interference is good, easy for installation, measurement accuracy
Height, can be achieved a wide range of long-term on-line real time monitoring, has realistic meaning for the real-time monitoring of roof Stress.With prior art
Compare, with advantages below：
Instant invention overcomes the defect present in existing fiber grating force-measuring anchor stock：Fiber grating strain is strained not with anchor pole
Easily coordinate in effective range, i.e., anchor pole strain facies is excessive for fiber grating and causing fiber grating to be pulled off causes to survey
Measure result inaccurate.The method that traditional stretching raster pattern device for measuring force monitors roof Stress is changed, Compressed grating is employed
The monitoring method of formula, when the sinking of somewhere back, after roof Stress changes, the anchor rod body of roof Stress monitoring device
Generation stretcher strain, because the seizing wire in roof Stress monitoring device is fixed by the hollow bolt at two ends at two ends
Firmly, so the stretcher strain of anchor rod body also causes steel wire rope therein to draw tighter, so that being pasted with optical fiber grating sensing
The hollow bolt of that one end of device also results in compression, and the fiber-optic grating sensor being then pasted onto on hollow bolt can be produced
The lightwave signal of contraction distortion.The monitoring device of squeezed light grating causes fiber grating not to be pulled off, measurement accuracy high, use
Long lifespan.The present invention changes the deficiency in conventional device design, the fiber grating on-line monitoring system transmission capacity used
Greatly, transmission range is wide, and electromagnetism interference is good, easy for installation, and measurement accuracy is high, and a wide range of long-term online prison in real time can be achieved
Survey, there is realistic meaning for the real-time monitoring of roof Stress, adapted to the safe and efficient production in present colliery, met colliery
Downhole safety needs, and promotes research work.
Brief description of the drawings
Fig. 1 is back stress monitoring system integral arrangement structural representation of the invention.
Fig. 2 cuts open for the single coal mine tunnel top board Stress On-Line device based on fiber-optic grating sensor of the present invention
Face figure.
Fig. 3 (a) is the single coal mine tunnel top board Stress On-Line device based on fiber-optic grating sensor of the invention
Bolt member structure chart.
Fig. 3 (b) is Fig. 3 (a) left view.
In figure：1- fiber gratings static state (FBG) demodulator；2- monitors computer；The 3- webservers；4- collieries LAN；5- visitors
Family end；6- is mining transmission cable；7- optical fiber terminal boxes；8- communication optical fibers；9- coal-faces；10- roof Stress monitoring devices；
11- monitors survey station；12- goafs；13- hollow bolts；14- seizing wires；15- hollow anchor bars；16- fiber-optic grating sensors；
17- optical fiber leadout holes；The hollow hole of 19- bolts.
Embodiment
One embodiment of the present of invention is further described below in conjunction with the accompanying drawings：
Coal mine tunnel top board Stress On-Line system based on fiber-optic grating sensor, it is characterised in that：It includes cloth
Put and be serially connected between the monitoring survey station 11 on the both sides back of coal-face 9, monitoring survey station 11 up to goaf 12,
Each monitoring survey station 11 includes the roof Stress monitoring device 10 in three roof Stress monitoring devices 10, each monitoring survey station 11
Between be cascaded by communication optical fiber 8, each tunnel tail end monitoring survey station 11 exit optical fiber pigtail pass through communication
Optical fiber is connected with optical fiber terminal box 7, and optical fiber terminal box 7 is quiet by mining transmission cable 6 and the fiber grating that is arranged on earth's surface
State (FBG) demodulator 1 is connected, and fiber grating static state (FBG) demodulator 1 is linked in sequence and has monitoring computer 2 and the webserver 3, network clothes
Business device 3 is connected by colliery LAN 4 with multiple client 5；
The roof Stress monitoring device 10 includes hollow anchor bar 15, and the length of hollow anchor bar 15 is 2000mm, hollow
The a diameter of 25mm of anchor pole 15, the two ends of hollow anchor bar 15 are respectively equipped with the hollow bolt 13 linked closely, the sky of described hollow bolt 13
Core diameter is 6mm, and screw diameter is 10mm, long 40mm, and the head diameter of bolt is 25mm, long 10mm, is set in hollow anchor bar 15
There are steel wire rope 14, steel wire rope 14 to be fixed on after being stretched by the hollow bolt 13 at anchor pole two ends on hollow anchor bar 15, hollow bolt
13 bolt part is provided with the symmetrical groove of twice, corresponding with groove on the head of hollow bolt 13 to go out to lead provided with two optical fiber
Portal 17, fiber-optic grating sensor 16 is provided with the groove of hollow bolt 13, the tail end of fiber-optic grating sensor 16 is drawn by optical fiber
Portal 17 extraction optical fiber, and symmetrical two fiber-optic grating sensors 16 of arrangement of pasting are easy to calibrating (base measuring) pressure value；
Each fiber-optic grating sensor 16 is connected by communication optical fiber 8 with optical fiber terminal box 7, and optical fiber terminal box leads to 7 mistakes
Mining transmission cable 6 is connected with the fiber Bragg grating (FBG) demodulator 1 on well.
The arranged for interval of roof Stress monitoring device 10, every 50 meters are arranged a roof Stress monitoring device on top plate
10, each roof Stress monitoring device 10 is provided with two fiber-optic grating sensors 17.
A kind of coal mine tunnel top board stress online test method based on fiber-optic grating sensor, is comprised the following steps that：
A, installation roof Stress monitoring device：On the groove that fiber-optic grating sensor 16 is close to hollow bolt 13, and
Optical fiber is drawn by optical fiber fairlead 17, two hollow bolts 13 are then held in the two ends of hollow anchor bar 15, by seizing wire
14 stretch through whole hollow anchor bar 15, complete the roof Stress monitoring device；
B, the arrangement monitoring survey station in tunnel, 3 roof Stress monitoring devices of top plate arranged for interval in monitoring survey station
10, the spacing distance of roof Stress monitoring device 10 is 50 meters, by optical fiber pigtail by roof Stress monitoring device 10
Fiber-optic grating sensor 16 is cascaded, and is pushed ahead along tunnel, and cloth is set when monitoring survey station 11 spacing distance is 20 meters
One monitoring survey station, until completing the monitoring survey station number of setting；
C, using communication optical fiber optical fiber pigtail is connected with optical fiber terminal box 7, and be connected to by mining transmission cable 6
On the static (FBG) demodulator 1 of fiber grating on ground, fiber grating static state (FBG) demodulator 1 is connected with monitoring computer 2；
D, when somewhere back sink, after roof Stress changes, the anchor rod body of roof Stress monitoring device 10
Generation stretcher strain because the seizing wire 14 in roof Stress monitoring device 10 by the hollow bolt 13 at two ends two
End is fixed, so the stretcher strain of anchor rod body also causes seizing wire 14 therein to draw tighter, so that being pasted with light
The hollow bolt 13 of that one end of fiber grating sensor 16 causes compression, is then pasted onto the optical fiber light on hollow bolt 13
Gate sensor 16 can produce the lightwave signal of contraction distortion；
E, if seizing wire 14 is deformed upon need not more change steel rope 14, in the event of fracture then need change steel
Cord 14 changes a new roof Stress monitoring device 10, occurs absciss layer to the optional position of back vertical direction
Or the stress for deformation of sinking is detected that the dangerous critical data by the data that detect with prestoring is compared, and is reached and is monitored in advance
Alert effect.
E, the lightwave signal for gathering fiber-optic grating sensor 16 are transmitted to fiber grating steady-state solution by FIBER OPTIC FIBERS ＆ CABLE
Instrument 7 is adjusted, lightwave signal is demodulated into by data signal by the static (FBG) demodulator 7 of fiber grating, monitoring computer 2 is then transmit to,
By carrying out data processing installed in the online-monitoring software of monitoring computer, the danger by the data that detect with prestoring is faced
Boundary's data compare, in real time display back stress data and variation tendency；
F, by colliery LAN and the webserver, the back stress data of monitoring is shared, realize pair
The online real-time remote monitoring of back stress.
Embodiment 1：A kind of coal mine tunnel top board Stress On-Line equipment based on fiber-optic grating sensor, in section lane
Interior Reasonable Arrangement monitors survey station quantity, monitors survey station 11 arranged for interval, 3 back Stress On-Line equipment 10, spacer
From for 50 meters, the optical fiber pigtail of the exit of fiber-optic grating sensor 10 is connected with communication optical fiber 8, passes through optical fiber terminal box 7
Communication optical fiber is connected with mining transmission cable 6, mining transmission cable 6 is connected with the input of the static (FBG) demodulator 1 of fiber grating,
The output end of fiber grating static state (FBG) demodulator 1 is connected with monitoring computer 2, and monitoring computer 2 passes through the webserver 3, coal
Ore deposit LAN 4 carries out data sharing with client 5, forms the on-line monitoring system of coal mine tunnel top board stress all -fiber communication.
A kind of coal mine tunnel top board Stress On-Line method based on fiber-optic grating sensor：
A, fiber-optic grating sensor is close on the sulculus of hollow bolt, and optical fiber is drawn by optical fiber fairlead, so
Two bolts are held in hollow anchor bar two ends afterwards, stretched with seizing wire through whole device, and steel wire rope two ends are fixed
Firmly, that is, the roof Stress monitoring device is completed；
B, a monitoring survey station is first set in tunnel, 3 roof Stress monitorings of top plate arranged for interval in monitoring survey station
Device, spacing distance is 50 meters, and the fiber grating in roof Stress monitoring device that will be monitored by optical fiber pigtail in survey station is passed
Sensor is cascaded, and is pushed ahead along tunnel, and spacing distance lays next monitoring survey station when being 20 meters, until completing to set
Fixed monitoring survey station number；
C, two communication optical fibers are laid to the two ends in tunnel, and with monitoring the exit of survey station inner fiber grating sensor
Optical fiber pigtail is connected；
D, all fiber grating roof Stress sensors are installed, i.e., into working condition, monitor back stress
Change；
E, the lightwave signal for gathering fiber-optical grating temperature sensor are transmitted static to fiber grating by FIBER OPTIC FIBERS ＆ CABLE
(FBG) demodulator, is demodulated into data signal by lightwave signal by the static (FBG) demodulator of fiber grating, is then transmit to monitoring computer, leads to
The interpretation software crossed installed in monitoring computer carries out data processing, and display back stress data and change in real time becomes
Gesture；
F, by colliery LAN and the webserver, the back stress data of monitoring is shared, realize pair
The online real-time remote monitoring of back stress.
Claims (5)
1. a kind of coal mine tunnel top board Stress On-Line system based on fiber-optic grating sensor, it is characterised in that：It includes
Be arranged in the monitoring survey station (11) on the back of coal-face (9) both sides, be serially connected between monitoring survey station (11) until
Goaf (12), each monitoring survey station (11) includes three roof Stress monitoring devices (10), each monitors in survey station (11)
It is cascaded between roof Stress monitoring device (10) by communication optical fiber (8), the monitoring survey station (11) of each tunnel tail end
Exit optical fiber pigtail be connected by communication optical fiber with optical fiber terminal box (7), optical fiber terminal box (7) passes through mining transmission light
Cable (6) is connected with the static (FBG) demodulator (1) of the fiber grating for being arranged on earth's surface, and fiber grating static state (FBG) demodulator (1) is linked in sequence
There are monitoring computer (2) and the webserver (3), the webserver (3) passes through colliery LAN (4) and multiple client (5)
It is connected；
The roof Stress monitoring device (10) includes hollow anchor bar (15), and hollow anchor bar (15) two ends are respectively equipped with the sky linked closely
Steel wire rope (14), the hollow bolt (13) that steel wire rope (14) passes through anchor pole two ends are provided with heart bolt (13), hollow anchor bar (15)
It is fixed on after stretching on hollow anchor bar (15), the bolt part of hollow bolt (13) is provided with the symmetrical groove of twice, hollow spiral shell
On the head of bolt (13) it is corresponding with groove go out provided with two optical fiber leadout holes (17), optical fiber is provided with the groove of hollow bolt (13)
Grating sensor (16), fiber-optic grating sensor (16) tail end draws optical fiber by optical fiber fairlead (17), symmetrical to paste arrangement
Two fiber-optic grating sensors (16) are easy to calibrating (base measuring) pressure value；Each fiber-optic grating sensor (16) by communication optical fiber (8) with
Optical fiber terminal box (7) is connected, and optical fiber terminal box leads to (7) excessively mining transmission cable (6) and the fiber Bragg grating (FBG) demodulator (1) on well
It is connected.
2. the coal mine tunnel top board Stress On-Line system according to claim 1 based on fiber-optic grating sensor, its
It is characterised by：Hollow anchor bar (15) length is 2000mm, a diameter of 25mm.
3. the coal mine tunnel top board Stress On-Line system according to claim 1 based on fiber-optic grating sensor, its
It is characterised by：The diameter of bore of described hollow bolt (13) is that 6mm, apparent diameter are 10mm, a length of 40mm, hollow bolt
Head diameter is 25mm, a length of 10mm.
4. the coal mine tunnel top board Stress On-Line system according to claim 1 based on fiber-optic grating sensor, its
It is characterised by：Roof Stress monitoring device (10) arranged for interval, every 50 meters are arranged a roof Stress monitoring on top plate
Device (10), each roof Stress monitoring device (10) is provided with two fiber-optic grating sensors (17).
5. the coal mine tunnel top board Stress On-Line system based on fiber-optic grating sensor described in a kind of usage right requirement 1
Detection method, it is characterised in that comprise the following steps：
A, installation roof Stress monitoring device：Fiber-optic grating sensor (16) is close on the groove of hollow bolt (13), and
Optical fiber is drawn by optical fiber fairlead (17), two hollow bolts (13) are then held in hollow anchor bar (15) two ends, will be thin
Steel wire rope (14) is stretched through whole hollow anchor bar (15), completes the roof Stress monitoring device；
B, the arrangement monitoring survey station in tunnel, 3 roof Stress monitoring devices (10) of top plate arranged for interval in monitoring survey station,
The spacing distance of roof Stress monitoring device (10) is 50 meters, by optical fiber pigtail by the light in roof Stress monitoring device (10)
Fiber grating sensor (16) is cascaded, and is pushed ahead along tunnel, and monitoring survey station (11) spacing distance is laid when being 20 meters
Next monitoring survey station, until completing the monitoring survey station number of setting；
C, using communication optical fiber optical fiber pigtail is connected with optical fiber terminal box (7), and be connected to by mining transmission cable (6)
On the static (FBG) demodulator (1) of fiber grating on ground, fiber grating static state (FBG) demodulator (1) is connected with monitoring computer (2)；
D, sink when somewhere back, after roof Stress changes, the anchor rod body of roof Stress monitoring device (10) hair
Raw stretcher strain because seizing wire (14) in roof Stress monitoring device (10) by the hollow bolt (13) at two ends
Fixed at two ends, so the stretcher strain of anchor rod body also causes seizing wire therein (14) to draw tighter, so that viscous
The hollow bolt (13) for posting that one end of fiber-optic grating sensor (16) causes compression, is then pasted onto hollow bolt
(13) fiber-optic grating sensor (16) on can produce the lightwave signal of contraction distortion；
E, if seizing wire (14) is deformed upon need not more change steel rope (14), in the event of fracture then need change steel
Cord (14) changes a new roof Stress monitoring device (10), and the optional position of back vertical direction occurs
Absciss layer or the stress for deformation of sinking are detected that the dangerous critical data by the data that detect with prestoring is compared, and reaches prison
Survey the effect of early warning.
E, the lightwave signal for gathering fiber-optic grating sensor (16) are transmitted to fiber grating static state by FIBER OPTIC FIBERS ＆ CABLE and demodulated
Instrument (7), is demodulated into data signal by lightwave signal by the static (FBG) demodulator (7) of fiber grating, is then transmit to monitoring computer
(2), by carrying out data processing installed in the online-monitoring software of monitoring computer, the data detected and the danger prestored are passed through
Dangerous critical data compares, in real time display back stress data and variation tendency；
F, by colliery LAN and the webserver, the back stress data of monitoring is shared, realize to tunnel
The online real-time remote monitoring of roof Stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561839.6A CN107328503B (en) | 2017-07-11 | 2017-07-11 | coal mine tunnel roof stress on-line monitoring system and method based on fiber bragg grating sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561839.6A CN107328503B (en) | 2017-07-11 | 2017-07-11 | coal mine tunnel roof stress on-line monitoring system and method based on fiber bragg grating sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107328503A true CN107328503A (en) | 2017-11-07 |
| CN107328503B CN107328503B (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710561839.6A Active CN107328503B (en) | 2017-07-11 | 2017-07-11 | coal mine tunnel roof stress on-line monitoring system and method based on fiber bragg grating sensor |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007775A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | Subterranean strata strain monitoring system |
| CN108051125A (en) * | 2017-12-06 | 2018-05-18 | 中国矿业大学(北京) | A kind of closed goaf caving zone stress field evolution measurement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007775A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | Subterranean strata strain monitoring system |
| CN108051125A (en) * | 2017-12-06 | 2018-05-18 | 中国矿业大学(北京) | A kind of closed goaf caving zone stress field evolution measurement method |
| CN108534929B (en) * | 2018-01-09 | 2020-12-29 | 中国海洋石油集团有限公司 | Ultra-high temperature sapphire optical fiber manometer and pressure monitoring system |
| CN108534929A (en) * | 2018-01-09 | 2018-09-14 | 中国海洋石油集团有限公司 | Superhigh temperature sapphire fiber pressure gauge and its processing method and pressure monitor system |
| CN109596060A (en) * | 2019-01-18 | 2019-04-09 | 山东道宽智能科技有限公司 | A kind of mining roof plate absciss layer sensor |
| CN110333017A (en) * | 2019-07-29 | 2019-10-15 | 宿州市金鼎安全技术股份有限公司 | A kind of coal mine tunnel top board monitor for stress based on fiber-optic grating sensor |
| CN110763380A (en) * | 2019-10-30 | 2020-02-07 | 煤炭科学技术研究院有限公司 | One-hole multi-point type stress and displacement monitoring system based on fiber bragg grating measurement |
| CN110987254B (en) * | 2019-11-25 | 2022-05-24 | 北京宇航系统工程研究所 | Bolt load wireless monitoring system and monitoring method |
| CN110987254A (en) * | 2019-11-25 | 2020-04-10 | 北京宇航系统工程研究所 | Bolt load wireless monitoring system and monitoring method |
| CN111521312A (en) * | 2020-05-08 | 2020-08-11 | 中国工程物理研究院化工材料研究所 | Method for calibrating residual stress of optical fiber measurement material based on blind hole method |
| CN111720173A (en) * | 2020-06-30 | 2020-09-29 | 上海应用技术大学 | Contact roadway surrounding rock load detector and roadway excavation load detection method |
| CN111928982A (en) * | 2020-07-27 | 2020-11-13 | 山东光安智能科技有限公司 | Mining visual fiber grating wide-range anchor rod cable stress monitoring sensor |
| CN111928982B (en) * | 2020-07-27 | 2021-09-10 | 山东光安智能科技有限公司 | Mining visual fiber grating wide-range anchor rod cable stress monitoring sensor |
| CN114754911A (en) * | 2022-04-06 | 2022-07-15 | 曹桂忠 | Coal mine tunnel roof stress detector based on fiber grating sensor |
| CN114964579A (en) * | 2022-07-28 | 2022-08-30 | 煤炭科学技术研究院有限公司 | Mining stress monitoring system based on distributed grating array |
| CN116007525A (en) * | 2023-03-24 | 2023-04-25 | 石家庄宜中机电技术有限公司 | On-line monitoring device for dense grating of deformation of coal mine shaft wall |
| CN117647340A (en) * | 2024-01-30 | 2024-03-05 | 成都工业职业技术学院 | Mining roof pressure detection device based on optical fiber sensor |
| CN117647340B (en) * | 2024-01-30 | 2024-03-29 | 成都工业职业技术学院 | Mining roof pressure detection device based on optical fiber sensor |
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