CN110006565A - A kind of device that monitoring tunnel blasting process side slope influences - Google Patents
A kind of device that monitoring tunnel blasting process side slope influences Download PDFInfo
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- CN110006565A CN110006565A CN201910342551.9A CN201910342551A CN110006565A CN 110006565 A CN110006565 A CN 110006565A CN 201910342551 A CN201910342551 A CN 201910342551A CN 110006565 A CN110006565 A CN 110006565A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005422 blasting Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 title claims abstract description 19
- 239000013307 optical fiber Substances 0.000 claims abstract description 57
- 239000000835 fiber Substances 0.000 claims abstract description 50
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004886 process control Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 28
- 238000005516 engineering process Methods 0.000 abstract description 9
- 231100000749 chronicity Toxicity 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 15
- 230000008859 change Effects 0.000 description 12
- 230000006378 damage Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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- 230000004044 response Effects 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- 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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Abstract
The present invention relates to safety of rock engineering Control Technology fields, particularly belong to a kind of device that monitoring tunnel blasting process side slope influences.A kind of device that monitoring tunnel blasting process side slope influences of the present invention, including Grating examinations unit and remote control terminal unit, Grating examinations unit is connected with remote control terminal unit by optical fiber, Grating examinations unit includes that metal hollow is led, metal hollow conduit two sides are equipped with several fiber grating temperature sensors and optical fiber optical grating stress sensor, fiber grating temperature sensor is identical with optical fiber optical grating stress sensor number, and center position is identical, fiber grating temperature sensor and optical fiber optical grating stress sensor are connected by communication optical fiber, it is respectively connected between the fiber grating temperature sensor and optical fiber optical grating stress sensor of an arrangement and is connected in parallel by communication optical fiber.The present invention provides one kind can carry out chronicity, stability, full-time empty, low cost slope monitoring apparatus.
Description
Technical field:
The present invention relates to safety of rock engineering Control Technology fields, particularly belong to a kind of monitoring tunnel blasting process side slope
The device of influence is further the strain variation feature based on fiber Bragg grating technology (FBG) monitoring free face rock mass,
Tunnel blasting vibration is evaluated to the intensity of rock side slope damage effect with this, is primarily adapted for use in blasting vibration to reservoir, highway, base
The influence monitoring and safety evaluation of the side slopes such as hole.
Background technique:
As national basis facilities item is constantly accelerated, it is limited to the restriction of the space factors such as landform, geology, engineering is built
If the new problem faced in the process, new situation are constantly emerged in large numbers.Wherein, the drill bursting construction phase is carried out around existing building
Between, in addition to newly built tunnels safety to be considered, orderly normal construction problem, also need sufficiently to pay close attention to blasting vibration to adjacent area building
The contents such as damage are destroyed, and adopts an effective measure and avoids the generation of disaster accident, to prevent giving the security of the lives and property of the people masses
Bring unnecessary loss.For this purpose, being directed to the vibration damage response characteristic of existing building, technological staff is in Numerical-Mode for many years
Quasi-, theoretical calculation and scale model etc. have carried out many research work, to reduce hazard of vibration pair to greatest extent
The adverse effect of existing building obtains some great successes.Show that reasonable field monitoring is to ensure work according to engineering practice
Journey safe construction and the key means of diaster prevention and control.
Current Test in Situ slope monitoring method is broadly divided into two classes: free face is apparently and rock mass internal modification destruction
Monitoring.The apparent observation of free face mainly uses the features such as the sliding on instrument and equipment side slope surface, deformation to carry out continuity and flutters
It catches, early-warning and predicting is carried out to geological disasters such as landslide, avalanches, this method is mainly used in rock mass and apparent change in displacement occurs,
Monitoring means includes total station survey, GPS monitoring, video monitoring and radar surveying method (SAR differential interferometry, vehicle-mounted thunder
Up to method) etc..At the scene in application process, such technological means exists more demanding to site environment, and measurement accuracy is limited equal to be lacked
Point, and can not achieve the dynamic monitoring that full-time sky is carried out to large-scale rock side slope.The monitoring of rock mass internal modification is from side
The stages such as breed, develop and destroy of slope hidden danger start with, and incude side slope indirectly using the sensor being implanted to inside rock mass
Motion feature.Such as conventional monitoring device inclinometer, and the sound emission monitoring technology, micro- of the physical property difference based on rock mass
Shake monitoring technology and drilling resistivity imaging etc..Routine monitoring means constructing operation program is complicated, and monitoring data are by the external world
Humane electromagnetic effect it is serious, acquisition instrument will appear drift error, and maintenance is difficult in use, automation
Monitoring capability is lower, and data reliability is not high；The peace of sensor in the monitoring methods such as sound emission monitoring technology, On Microseismic Monitoring Technique
It is filled with and the analysis of Monitoring Result is there is also deficiency, poor anti jamming capability, and since electric signal transmits inconvenience at a distance, on side
Cost in the monitoring of slope is also higher.
Tunnel blasting vibration further includes drilling monitoring ultrasonic method to the destruction monitoring method of rock side slope, passes through test
The knots modification of acoustic velocity is before and after explosion to evaluate Rock Damage degree, but the measuring technology needs medium couples, scene behaviour
The problems such as work is complicated, and working strength is larger.Currently, the water environment as locating for reservoir rock side slope is more complicated, item of constructing
Part is inconvenient, and the requirement to monitoring device is higher, and the artificial strong jamming around tunnel seriously affects the reliable of electromagnetism class sensing equipment
Property.From current monitoring technology, there is also apparent observation method telemeasurement precision is lower, rock mass internal monitoring side
The installation of method sensor is complicated, engineering generation builds the problems such as higher, applies at the scene, and two class monitoring means are relatively isolated, monitoring
Position and monitoring signals otherness are larger, can not achieve a wide range of monitoring requirements of the side slope from exterior portion to depth.
Based on the above deficiency, a kind of installation is simple, monitoring to needing in terms of reservoir rock side slope evaluation of vibration for blast working
Range is wide, strong antijamming capability, monitoring technology and method with long-range full-time sky, vibrates to realize to measuring tunnel blasting
Wave to rock side slope, build the size of object structural vibration effect, the Monitoring Result of multifrequency time is also the safety evaluation of slope stability
Important support is provided.
Summary of the invention
The present invention constructs for current tunnel blasting influences the monitoring method deficiency of evaluation, Yi Jijian on reservoir rock side slope
The problems such as measurement equipment, lower measuring accuracy and the level of informatization, the object of the present invention is to provide one kind can carry out chronicity, steady
Qualitative, full-time empty, low cost slope monitoring apparatus；Concrete scheme is as follows:
A kind of device that monitoring tunnel blasting process side slope influences, including Grating examinations unit and remote control terminal list
Member, the Grating examinations unit are connected with remote control terminal unit by optical fiber, and the Grating examinations unit includes metal sky
Cardiac catheter, fiber grating temperature sensor, optical fiber optical grating stress sensor and communication optical fiber, metal hollow conduit two sides are set
There are several fiber grating temperature sensors and optical fiber optical grating stress sensor, the fiber grating temperature sensor and fiber grating
Strain gauge number is identical, and center position is identical, the fiber grating temperature sensor and optical fiber optical grating stress sensing
Device is connected by communication optical fiber, the fiber grating temperature sensor and optical fiber optical grating stress sensing for being respectively connected into an arrangement
It is connected in parallel between device by communication optical fiber.FBG monitoring unit of the present invention is arranged in the inside of slope rock mass, in tunnel
Before blast working, multiple stages in work progress and after the completion of construction etc., utilize fiber grating probe monitors temperature, pressure
Variable quantity；Fiber-optic grating sensor monitoring is flutterred the signal grasped and is transferred to remote control terminal unit by communication optical fiber, long-range to control
End unit processed further extrapolates the changing rule of external environment to acquisition reflection ambient temperature, pressure, to evaluate rock matter side
Response characteristic of slope during tunnel blasting.
The Grating examinations unit includes fixed link, casing, baffle and support rod, and the fixed link is fixed on metal hollow
On conduit, described communication optical fiber one end is fixed in fixed link, and metal hollow conduit inner end has external screw thread, described sleeve pipe
One end has internal screw thread, and the external screw thread and internal screw thread are correspondingly arranged, and the described sleeve pipe other end is fixed with support rod, the support
The other side of bar is baffle.Freely it can install and unload between casing, support rod and baffle and metal hollow conduit of the invention
Go (i.e. casing and metal hollow conduit is connected through a screw thread).
The support rod totally 3, the adjacent angle of the support rod is 120 °.Hole between support rod is conducive to slurries
It is flowed into hole；Baffle is located at the front end of FBG monitoring unit, and baffle can prevent drilling intraclast object from entering metal sky
Cardiac catheter.
The optical fiber and communication optical fiber are armored optical cable, prevent the destruction or damage of internal optical fiber element under external force
Wound.
The remote control terminal unit includes fiber Bragg grating (FBG) demodulator and the data processing centre for signal acquisition,
The fiber grating demodulation device and data processing centre's series connection.
In view of detection requirement and the integrality of slope rock mass structure, representative and typicalness is answered in monitoring point, monitoring
Point is typically no less than 3, that is, includes the position that big gun spacing is nearest in side slope, rock mass is completely to poor position and existing building
Neighbouring position；The monitoring point is drilling hole location (Grating examinations unit of the invention is placed in drilling hole), wherein drilling is deep
Degree is not less than 5m, 110~130mm of boring aperture, and boring direction is directed toward tunnel center；The monitoring point is arranged in higher than reservoir just
The position of normal water storage bit line 1m or more.The diameter of metal hollow conduit of the invention should at least be less than the 1/2 of bore diameter, bore
Metal hollow conduit can be made of 1 or more connection in hole, and the metal hollow pipe internal channel is used for the flowing of slurries.
The number and spacing of the fiber grating temperature sensor and optical fiber optical grating stress sensor can be according to detection requirements
And drilling depth determines, and it is general to be not less than 3, it is predominantly located at the positions such as drilling orifice, middle part and bottom hole.
Temperature sensor and strain gauge of the invention is fiber grating temperature sensor and optical fiber optical grating stress sensing
Device: when a branch of light wave passes through fiber grating, as reflecting mirror, the light wave met certain condition passes through fiber grating internal structure at this time
Optical grating reflection is crossed as reflected light, remaining becomes transmitted light continuation and propagates forward.When grating by temperature, strain etc. it is extraneous because
When element interference, optical grating construction changes, and reflected wavelength values generate variation, by reflection wavelength variable quantity,
To realize the measurement to strain and temperature change.
According to maxwell equation group and the fiber coupling theory of modules, the feature expression of fiber grating reflected wavelength lambda B is obtained
Are as follows:
λB=2neffΛ (1)
In formula: neffFor fiber core effective refractive index, Λ be grating pitch (the distance between each write-in grating,
Claim screen periods).
By formula (1) it is found that neffIt can result in the drift of Bragg center reflection wavelength with the variation of Λ.
(1) sensing characteristics of the FBG (fiber grating) under uniform axle power
When grating is by extraneous effects of strain or temperature change, grating region Λ and neffIt changes, eventually leads to
Bragg wave length shift, it is theoretical by mathematics calculus it is recognised that the wavelength variable quantity Δ λ to return from optical grating reflectionBεIt can indicate
Are as follows:
ΔλBε=2 Δ neffΛ+2neffΔΛ (2)
Formula (2) both sides are obtained divided by formula (1) respectively:
In linear-elastic range, have:
ε is the axial strain amount of FBG in above formula.
When only considering the axial deformation of FBG, variations in refractive index of the FBG under axial elastic deformation are as follows:
In formula: P11, P12For the elasto-optical coefficient of single mode optical fiber, as vertical and horizontal refraction caused by longitudinal strain respectively
Rate variation；V is the Poisson's ratio of fiber optic materials.
It enables
Then: by the wavelength change basic relational expression under formula (2), (3), (4) available fiber grating axial strain:
ΔλBε/λBε=(1-P) ε (5)
It can thus be seen that the material of FBG once it is determined that, theoretically ensure that fiber grating as strain sensing utensil
There is preferable linear convergent rate.
Enable αε=λBε(1-P), αεIt can be used as the sensitivity coefficient of FBG axial strain Yu center wavelength variation relationship, thus
It can obtain:
ΔλBε=αεε (6)
Such as fibre core is the optical fiber situation of pure quartz, neff=1.46, p11=0.121, p12=0.270, v=0.17 obtain P
=0.22.For the input light of 1550nm wavelength, wave length shift caused by each microstrain is 1.209pm, strain sensitivity
For 0.79/u ε, i.e. αε=1.1625pm/u ε.
(2) thermometer sensor DS18B20 of FBG
Temperature change had both caused the variation of FBG effective refractive index, simultaneously because thermal expansion can also cause the variation of pitch.?
In the case where not considering waveguiding effect, by formula (1) to temperature T differentiation, it can obtain:
Formula (7) both sides are obtained divided by formula (1) respectively:
It enablesAs thermo-optical constant；As thermal expansion coefficient, so as to:
Wavelength change mathematic(al) representation under the effect of FBG temperature change, it is the primary relationship for handling FBG temperature sensing
Formula, when one timing of FBG material it can be seen from the formula, FBG is substantially one and material system to the sensing characteristics coefficient of temperature
The relevant constant of number, this just theoretically ensure that FBG has good linear convergent rate as temperature sensor.
It enables:αTFor the sensitivity coefficient of FBG temperature sensor, it can thus be concluded that:
ΔλBT=αTΔT (10)
(3) temperature is with strain in optical fiber grating sensing measurement while effect causes the wavelength change of BFG:
△λB=△ λBε+△λBT=αεε+αT△T (11)。
Each measuring point arrangement fiber Bragg grating strain sensor and fiber grating temperature sensor, when extraneous stress changes
When, strain gauge central wavelength can change, variation of the change from extraneous temperature change and stress at this time, institute
Subtract temperature sensor with total variation that strain gauge is measured at this time (default strain does not have an impact to temperature sensor)
Variation, i.e., acquisition pure strain caused by center wavelength variation (i.e. Δ λ in formula 11BIt is measured by optical fiber optical grating stress sensor,
ΔλBTIt is measured by fiber grating temperature sensor, so as to which center wavelength variation Δ λ caused by pure strain is calculatedBε),
The variable quantity strained by conversion.
Present invention realization multiple stages before blast working, in blast working and after explosion etc. carry out dynamic prisons
It surveys, blast working is instructed according to Monitoring Result and evaluates rock side slope deformation in the whole process, destroys equivalent damage situation,
Being normally carried out for construction is ensured safety, while also being provided for the maintenance, safe operation and hazards control in engineering later period
Foundation.The present invention is by being implanted into fiber-optic grating sensor (fiber grating temperature sensor and optical fiber on reservoir rock side slope
Grating strain gauge), the variation characteristic of rock mass exterior portion and internal stress, strain during blast working is monitored, rock is evaluated
The stability influence of the vibration effect of explosion side slope of body.
Detailed description of the invention
A kind of structural schematic diagram for the device that monitoring tunnel blasting process side slope influences of Fig. 1 present invention；
The structural representation of Grating examinations unit in a kind of device that monitoring tunnel blasting process side slope influences of Fig. 2 present invention
Figure；
The part-structure of Grating examinations unit in a kind of device that monitoring tunnel blasting process side slope influences of Fig. 3 present invention
Schematic diagram；
The installation signal of Grating examinations unit in a kind of device that monitoring tunnel blasting process side slope influences of Fig. 4 present invention
Figure；
Wherein label: 1-side slope；2-tunnels；3-reservoirs；4-drillings；5-metal hollow conduits；6-fiber gratings
Temperature sensor；7-optical fiber optical grating stress sensors；81-communication optical fibers；82- optical fiber；9-fiber Bragg grating (FBG) demodulators；10―
Data processing centre；11-fixed links；12-casings；13-support rods；14-baffles；15-monitoring points；16. Grating examinations list
Member.
Specific embodiment
A kind of device that monitoring tunnel blasting process side slope influences, including Grating examinations unit 16 and remote control terminal
Unit, Grating examinations unit 16 and remote control terminal unit are connected by optical fiber 82, and Grating examinations unit 16 includes that metal is empty
Cardiac catheter 5, fiber grating temperature sensor 6, optical fiber optical grating stress sensor 7 and communication optical fiber 81,5 two sides of metal hollow conduit
It (is 6 He of fiber grating temperature sensor in Fig. 2 equipped with several fiber grating temperature sensors 6 and optical fiber optical grating stress sensor 7
Optical fiber optical grating stress sensor 7 is 8 situations), fiber grating temperature sensor 6 and the number of optical fiber optical grating stress sensor 7
Mesh is identical, and center position is identical, and fiber grating temperature sensor 6 and optical fiber optical grating stress sensor 7 pass through communication optical fiber
81 series connection, are respectively connected between the fiber grating temperature sensor 6 of an arrangement and optical fiber optical grating stress sensor 7 and pass through communication
Optical fiber 81 is connected in parallel.
Grating examinations unit 16 includes fixed link 11, casing 12, baffle 14 and support rod 13, and fixed link 11 is fixed on metal
On hollow tubing conductor 5,81 one end of communication optical fiber is fixed in fixed link 11, and 5 inner end of metal hollow conduit has external screw thread, casing 12
One end has internal screw thread, and external screw thread and internal screw thread be correspondingly arranged, and 12 other end of casing is fixed with support rod 13, support rod 13 it is another
Side is baffle 14.Can freely be installed between casing 12 of the invention, support rod 13 and baffle 14 and metal hollow conduit 5 with
Shed (i.e. casing 12 and metal hollow conduit 5 is connected through a screw thread).
Support rod 13 totally 3, the adjacent angle of support rod 13 is 120 °.Hole between support rod 13 be conducive to slurries to
It is flowed in hole；Baffle 14 is located at the front end of FBG monitoring unit 16, and baffle 14 can prevent drilling intraclast object from entering gold
Belong to hollow tubing conductor 5.
Optical fiber 82 and communication optical fiber 81 are armored optical cable.
Remote control terminal unit includes (the portable fiber-optic grating demodulation of fiber Bragg grating (FBG) demodulator 9 for signal acquisition
Instrument NZS-FBG-A03) and data processing centre 10, fiber grating demodulation device and data processing centre's series connection.
In view of detection requirement and the integrality of slope rock mass structure, representative and typicalness is answered in monitoring point 15, prison
Measuring point 15 is typically no less than 3 (being 4 situations in Fig. 4), that is, includes the position that big gun spacing is nearest in side slope 1, rock mass is complete
To poor position and existing building neighbouring position；Monitoring point 15 is that 4 hole locations of drilling (are placed with of the invention in 4 holes of drilling
Grating examinations unit 16), wherein 4 depth that drill are not less than 5m, drill 4 110~130mm of aperture, and tunnel 2 is directed toward in 4 directions of drilling
Center；Monitoring point 15 is arranged in the position higher than 3 normal pool level line 1m of reservoir or more.Metal hollow conduit 5 of the invention
Diameter should at least be less than the 1/2 of 4 diameters of drilling, and metal hollow conduit 5 can be made of 1 or more connection in drilling 4, gold
Belong to the flowing that 5 internal channel of hollow pipe is used for slurries.
Fiber grating temperature sensor 6 and optical fiber optical grating stress sensor 7 are under the connection of communication optical fiber 81 finally in hole
Bunchy is converged in 4 apertures of mouth drilling, concentrates and extends to remote control terminal.
FBG monitoring unit 16 of the present invention is arranged in the inside of side slope 1, before 2 blast working of tunnel, work progress
In and construction after the completion of etc. multiple stages, using fiber-optic grating sensor, (fiber grating temperature sensor 6 and fiber grating are answered
Force snesor 7) monitoring temperature, pressure variable quantity；Fiber-optic grating sensor monitoring is flutterred the signal grasped and passed by communication optical fiber 81
Defeated to arrive remote control terminal unit, remote control terminal unit further extrapolates extraneous ring to acquisition reflection ambient temperature, pressure
The changing rule in border, to evaluate response characteristic of rock side slope during tunnel blasting.
Above-described embodiment is only used for illustrating inventive concept of the invention, rather than the restriction to rights protection of the present invention,
It is all to be made a non-material change to the present invention using this design, protection scope of the present invention should all be fallen into.
Claims (5)
1. a kind of device that monitoring tunnel blasting process side slope influences, it is characterised in that: including Grating examinations unit and remotely
Controlling terminal unit, the Grating examinations unit are connected with remote control terminal unit by optical fiber, the Grating examinations unit
Including metal hollow conduit, fiber grating temperature sensor, optical fiber optical grating stress sensor and communication optical fiber, the metal hollow
Conduit two sides are equipped with several fiber grating temperature sensors and optical fiber optical grating stress sensor, the fiber grating temperature sensor
It is identical with optical fiber optical grating stress sensor number, and center position is identical, the fiber grating temperature sensor and optical fiber light
Grid strain gauge is connected by communication optical fiber, the fiber grating temperature sensor and optical fiber light for being respectively connected into an arrangement
It is connected in parallel between grid strain gauge by communication optical fiber.
2. a kind of device that monitoring tunnel blasting process side slope influences as described in claim 1, it is characterised in that: the light
Grid detection unit includes fixed link, casing, baffle and support rod, and the fixed link is fixed on metal hollow conduit, described logical
News optical fiber one end is fixed in fixed link, and metal hollow conduit inner end has external screw thread, and described sleeve pipe one end has interior spiral shell
Line, the external screw thread and internal screw thread are correspondingly arranged, and the described sleeve pipe other end is fixed with support rod, and the other side of the support rod is
Baffle.
3. a kind of device that monitoring tunnel blasting process side slope influences as claimed in claim 2, it is characterised in that: the branch
Strut totally 3, the adjacent angle of the support rod is 120 °.
4. a kind of device that monitoring tunnel blasting process side slope influences as described in claim 1, it is characterised in that: the light
Fine and communication optical fiber is armored optical cable.
5. a kind of device that monitoring tunnel blasting process side slope influences as described in claim 1, it is characterised in that: described remote
Process control terminal unit includes for the fiber grating demodulation device of signal acquisition and data processing centre, the fiber grating solution
Adjust device and data processing centre's series connection.
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| CN201910342551.9A CN110006565A (en) | 2019-04-26 | 2019-04-26 | A kind of device that monitoring tunnel blasting process side slope influences |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910342551.9A CN110006565A (en) | 2019-04-26 | 2019-04-26 | A kind of device that monitoring tunnel blasting process side slope influences |
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