CN106246162A - Floor undulation is across borescopic imaging device and slip casting effect monitoring method - Google Patents
Floor undulation is across borescopic imaging device and slip casting effect monitoring method Download PDFInfo
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- CN106246162A CN106246162A CN201610838457.9A CN201610838457A CN106246162A CN 106246162 A CN106246162 A CN 106246162A CN 201610838457 A CN201610838457 A CN 201610838457A CN 106246162 A CN106246162 A CN 106246162A
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- cable
- monitoring
- electrode
- boring
- slip casting
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/005—Monitoring or checking of cementation quality or level
-
- 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
The invention discloses a kind of floor undulation slip casting real-time monitoring device, the multiple monitoring holes arranged in being included in coal mine work area two tunnel, a number of annular electrode and a cable in being fixed on plastic bushing it is equipped with in each monitoring holes, described annular electrode is uniformly connected on cable, cable in multiple monitoring holes is introduced under roadway floor after connecting after drawing at monitoring aperture, cable is incorporated into outside work surface by the cable trench preset, the DC electrical method instrument that cable is connected to outside work surface；The degree of depth of described monitoring holes is more than the degree of depth in water-bearing layer to floor undulation；Described annular electrode adds a weight with the bottom of cable, makes the hole wall keeping parallelism state of annular electrode and cable and monitoring holes, makes annular electrode spacing impartial.The invention also discloses the monitoring method utilizing this monitoring device.This device and method both can be with monitoring face floor grouting effect, again can be with monitoring face Floor water feelings situation of change, and Method And Principle is simple, practical.
Description
Technical field
The present invention relates to a kind of coal mine work area floor grouting field, especially a kind of floor undulation is across borescopic imaging device
And slip casting effect monitoring method.
Background technology
In recent years, along with being continuously increased of coal mining depth, North China type coalfield superficial part coal seam is almost exploited complete, mine
Deep fractures is owing to being threatened by high artesian, thin water barrier, and water bursting in mine happens occasionally.North China type coalfield deposition coal seam one
As belong to coking coal, and coking coal is steel-making necessary article, and other coal is the most replaceable.Therefore, North China type coalfield deep how is liberated
Mine is become, by the coal seam of high artesian, thin water barrier, the important subject that current mine water is prevented and treated.
Floor undulation slurry injection technique is the important method solving to mine on high artesian.Traditional slurry injection technique method is
Use the method that uniform drilling carries out slip casting, the shortcoming of this method: grouting amount is big, and slip casting efficiency is low, during slip casting not
Can accomplish that slip casting effect is the best with a definite target in view.Along with the development of technology, before slip casting, a lot of technical staff use geophysics skill
The situation of change of the rock stratum that art is detected, carries out grouting and reinforcing at water layer thin to floor undulation.The method compared with traditional method,
This patent is possible not only to monitor the change of slip casting process really, and by the slip casting situation of whole work surface, can by three-dimensional
Showing depending on change system, especially slip casting weakness zone is presented to mine water preventing and treating person in real time, preventing and treating person can be according to scene
Slip casting improvement project is made in change, both can improve slip casting efficiency, and can save again injecting paste material, and this is that other method cannot solve
's.
Chinese patent application 201210038167 uses transient electromagnetic apparatus as a part for work surface measuring point network, wink
Becoming electromagnetic apparatus advantage sensitive to post non of low resistance body, detection accuracy rate is high；But its shortcoming be affected by the surrounding environment big, interference is many,
Especially being affected by " low-resistance interfering bodies " in exploitation process, data reliability has problems, and not only monitoring is inaccurate, easily causes
False anomaly, affects the normal back production of work surface；Additionally this patent carries out emphasis monitoring to work surface key area, and key area is only
Being to speak of in general terms, the key area formed formation damage without reference to mine pressure in mining active process, more without reference to work
The problem making face slip casting.
Chinese patent application 201310728093 prevents mainly for coal mining under water bodies that water sand body is prominent to be gushed, and improves seam mining
The upper limit and the EXPERIMENTAL DESIGN that carries out, belong to a kind of special circumstances of roof water inrush, does not possess the real-time of grouting and regimen
The universal meaning of dynamic monitoring.
Chinese patent application 201410529007,201410529019,201510134024, three above patent is mainly
For research work face plate destructing depth in mining active process, although the plate destructing depth occurrence status to base plate regimen
There is certain influence, but plate destructing depth is two distinct concepts with grouting and regimen, therefore, no
Plate destructing depth monitoring can be considered as the real-time monitoring of work surface regimen.Disclosed work surface water regime monitoring, the method technology
Project plan comparison is complicated, and execute-in-place cost is big, utilizes the regimen change of transient electromagnetic monitoring face, gathers data reliability low,
Monitoring effect is poor.This patent simply realizes the monitoring of water burst in face hydrogeologic condition, for starching during grouting
The Changing Pattern of liquid is helpless.
Chinese patent 200920143376.2 discloses the system of a kind of high-density resistivity monitoring crag relaxation zone, and it is
The first multiple section borehole in country rock tunnel, bury the multicore cable with electrode and exhaustor underground in hole, use grouting device
Fill couplant by boring, measure organize resistivity data, finally more by being connected to the resistivity meter of the outer end of multiple conductor cable
According to the data application High Density Resistivity collected, wall rock loosening ring is realized monitoring.This patent is only at high density electricity
Change cloth pole method and the problem of observation device on the traditional infrastructure of method, can only simply measure tunnel change in resistance, with work
Make face base plate imaging device different, essential distinction is existed for grouting effect method of real-time.Floor undulation is noted
Slurry is not only dynamic process, and relates to 3 Dimension Image Technique and method, from drilling construction to the design of whole observation device,
200920143376.2 patent is all not related to.
Chinese patent 201420786793.X discloses the monitoring and prediction dress of a kind of coal-face top, Water Inrush disaster
Putting, this device includes several electrodes being arranged in orientation concordant boring and two the infinity electricity being arranged in tunnel
Pole, the boring of described orientation concordant arranges several, and each orientation concordant is holed from face roof or base plate, or local
Top board or the base plate of dangerous section extend to underground at least two-layer；Several electrodes described and two infinite electrodes are all by logical
The processor that news cable is arranged with ground is connected.201420786793.X patent is the simplest changes electrode and the connection of cable
Method goes to monitor water damage device, with traditional mine direct current two dimension electrical method is as broad as long, can only present a section, can not be entirely square
Grouting situation is observed in position, and therefore, floor undulation slip casting effect can not be guaranteed.
Summary of the invention
It is an object of the invention to as overcoming above-mentioned the deficiencies in the prior art, it is provided that a kind of floor undulation is across borescopic imaging device
And slip casting effect monitoring method, this device and method both can be with monitoring face floor grouting effect, again can be with monitoring face
Floor water feelings situation of change, Method And Principle is simple, practical.
For achieving the above object, the present invention uses following technical proposals:
A kind of floor undulation across borescopic imaging device, is included in multiple monitoring holes of setting in coal mine work area two tunnel,
A number of annular electrode and a cable, described annular electrode in being fixed on plastic bushing it is equipped with in each monitoring holes
Uniformly being connected on cable, after the cable in multiple monitoring holes is drawn at monitoring aperture, introduce under roadway floor, cable passes through
The cable trench preset is incorporated into outside work surface, the DC electrical method instrument that cable is connected to outside work surface；
The degree of depth of described monitoring holes is more than the degree of depth in floor undulation water-bearing layer to floor undulation；
Described annular electrode adds a weight with the bottom of cable, makes annular electrode and cable keep with the hole wall of monitoring holes
Parastate, makes annular electrode spacing impartial.
Spacing between each two monitoring holes is between 50-120m.
The compressive resistance of described cable is more than 6Mpa.
Described monitoring holes is vertical boring or the boring tilted.
Described electrode is copper circular ring electrode, can increase the contact surface of electrode and injecting paste material, makes electrode with extraneous
Medium is fully contacted.
Being evenly arranged with 15 electrodes in each monitoring holes, the spacing between each two electrode is 5m, altogether 75m.
Below described plastic bushing distance roadway floor at 0.8m, being provided with screw hole, cable connector draws from this screw hole
Go out, and use nut to be screwed on by this screw hole.
On described roadway floor, digging the deep cable trench of 0.8m, cable is incorporated into work by the cable trench preset
Make at the DC electrical method instrument outside face, it is simple to data acquisition.
Utilize floor undulation across the slip casting effect monitoring method of borescopic imaging device, comprise the following steps:
1) according to the situation of work surface, appropriate design boring in work surface about two two tunnel；
2) carry out, across hole three-dimensional imaging Forward Modeling and Inversion research, observing imaging effect, according to inversion imaging according to the boring of design
Situation determines the reasonability of boring；
3), after determining bore position, drilling construction is carried out:
A holes in work progress, and boring must use sleeve technology, uses non-metallic casing, and sleeve pipe aperture is less than boring
Both may be used in aperture, hole；
B is when boring discloses water-bearing layer, it is necessary to water-bearing layer first carries out slip casting, plugging water-bearing stratum crack, closes aqueous
Layer hole section；Close intact after, again boring is constructed, continue to boring deep construction, until construction to drilling design deep
Degree position；
4), after drilling construction, electrode and cable are connected；A weight, purpose is added in the bottom of electrode Yu cable
It is electrode and cable hole wall keeping parallelism state, makes electrode spacing impartial；
5) slip casting closure electrode and cable are holed and bury the cable picked out in boring underground；In order to ensure that data acquisition is normal
Gather, by good to electrode and cable burial, it is ensured that data will be transmitted to main frame through cable.
6) detect the connection of package unit, connect intact after can carry out being normally carried out across hole three-dimensional imaging, monitoring
Slip casting situation, carries out emphasis slip casting to slip casting defective region.
Described step 2) in across hole three-dimensional imaging Forward Modeling and Inversion particularly as follows:
The base area electric theory point source three-dimensional electric field differential equation is:
σ represents electrical conductivity,Representing potential difference, I represents that electric current, δ are Dirac functions, (x0,y0,z0) it is position of source,
(x, y, z) for measuring the position of point, make form under the conditions of three-dimensional rectangular coordinate into by upper formula:
Above formula makes finite difference equations intoA is large-scale symmetric positive definite matrix,For the current potential on grid node to
Amount, b is supply terminals position vector；And utilize two-way conjugate gradient method to solve three-dimensional Potential distributionValue, solves three-dimensional electric field
Potential distribution process is process of just drilling；After D integral pin-fin tube completes, utilize round and smooth method of least square to carry out inverting, be finally inversed by work
Face formation resistivity scattergram.
After slip casting completes, this method can continue the method adopting work surface as monitoring, during working face extraction,
Monitoring face base plate Mining failure process in real time, until work surface safety coal extraction completes.
On the basis of the present invention utilizes traditional DC electrical method technology, by construction drill in work surface two tunnel,
Design a number of annular electrode and cable in boring, utilize plastic bushing electrode and cable to be fixed, then at sleeve pipe
Interior by electrode and cable inclosure boring, cable is introduced under roadway floor at hell, by default cable duct by electricity
Cable is incorporated into outside work surface, carries out the processes such as data acquisition process imaging, based on not in connecting cables to DC electrical method instrument
With realizing across hole three-dimensional-electroded method technology between boring, real-time monitoring face causes change in resistance feelings due to slip casting
Condition, makes rational slip casting arrangement according to monitoring situation, improves slip casting effect.After slip casting completes, work surface in exploitation process,
Can be with the change of monitoring face base plate regimen, forecast that floor undulation gushing water situation is made prediction, thus safeguard work face
Safe working.The present invention is both can be with monitoring face floor grouting effect, again can be with monitoring face Floor water end of love feelings
Condition, Method And Principle is simple, practical.
Apparatus of the present invention include work surface monitoring holes multiple (design according to demand), cable, annular electrode, electric method meter
The devices such as device.Wherein monitoring holes number designs according to length and the monitoring accuracy of work surface, the generally position of monitoring holes
Between 50-120m, the degree of depth of monitoring holes is greater than contains according to the depth design in stope water-bearing layer, the degree of depth of monitoring holes
Water layer is to the degree of depth of floor undulation.Cable needs compressive resistance, generally higher than 6-8Mpa；Each monitoring holes of length of cable
Cable will be connected to DC electrical method instrument position.Annular electrode number designs according to demand, it is desirable to electrode and cable junction
Connecting intact, junction seals.DC electrical method instrument can carry out gathering data across sky.
Accompanying drawing explanation
Fig. 1 is grouting drilling design schematic diagram of the present invention；
Fig. 2 is monitoring holes structural representation of the present invention；
Fig. 3 is that 200m × 100m work surface of the present invention is across empty imaging model；
Fig. 4 is that 200m × 100m of the present invention is across empty Scattering data figure；
Fig. 5 is that present invention work surface is across borescopic imaging model；
Fig. 6 is that present invention work surface is across borescopic imaging model inversion figure；
Fig. 7 is across borescopic imaging inversion chart after present invention grouting；
Fig. 8 is across borescopic imaging Z-direction dropping cut slice after present invention grouting；
Fig. 9 is across borescopic imaging X-direction terrace cut slice after present invention grouting；
Wherein, 1. monitoring holes, 101. screw holes, 102. annular electrodes, 103. plastic bushings, 2. cable, 3. DC electrical method
Instrument.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Structure depicted in this specification institute accompanying drawings, ratio, size etc., the most only in order to coordinate disclosed in description in
Hold, understand for those skilled in the art and read, being not limited to the enforceable qualifications of the present invention, therefore do not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size, can produce not affecting the present invention
Under the effect given birth to and the purpose that can reach, all should still fall in the range of disclosed technology contents obtains and can contain.
Meanwhile, in this specification cited as " on ", D score, "left", "right", the term of " middle " and " " etc., be merely convenient to
Understanding of narration, and it is not used to limit the enforceable scope of the present invention, being altered or modified of its relativeness, changing without essence
Under technology contents, when being also considered as the enforceable category of the present invention.
As Figure 1-Figure 2, floor undulation, across borescopic imaging device, arranges many in being included in coal mine work area two tunnel
Individual monitoring holes 1, is equipped with in being fixed on plastic bushing 103 a number of annular electrode 102 and one in each monitoring holes 1
Cable 2, described annular electrode 102 is uniformly connected on cable 2, after the cable 2 in multiple monitoring holes 1 is drawn at monitoring aperture
Being introduced into after series connection under roadway floor, cable 2 is incorporated into outside work surface by the cable trench preset, and cable 2 is connected to work
DC electrical method instrument 3 outside face；The degree of depth of described monitoring holes 1 is more than the degree of depth in water-bearing layer to floor undulation；Described annular electro
Pole 102 adds a weight with the bottom of cable 2, makes the hole wall keeping parallelism state of annular electrode 102 and cable 2 and monitoring holes 1,
Make annular electrode 102 spacing impartial.
Spacing between each two monitoring holes 1 is between 50-120m.The compressive resistance of described cable 2 is more than 6Mpa.Monitoring holes
1 is vertical boring or the boring tilted.
Annular electrode 102 is copper circular ring electrode, can increase the contact surface of electrode and injecting paste material, makes electrode with outer
Boundary's medium is fully contacted.
Being evenly arranged with 16 annular electrodes in each monitoring holes 1, the spacing between each two annular electrode is 5m, altogether
75m。
Plastic bushing 103 at 0.8m, is provided with screw hole 101 below roadway floor, and cable connector is from this screw hole 101
Middle extraction, and use nut to be screwed on by this screw hole.
On roadway floor, digging the deep cable trench of 0.8m, cable 2 is incorporated into work surface by the cable trench preset
At outer DC electrical method instrument 3, it is simple to data acquisition.
Utilize floor undulation across the slip casting effect monitoring method of borescopic imaging device, comprise the following steps:
1) according to the practical situation of work surface, appropriate design boring in work surface about two two tunnel；Design certain work
Face length is 328m, the work surface of a width of 110m, altogether 8 borings of design, each 4 borings in upper and lower tunnel, and each boring uses electrode
15, use 120 electrodes altogether, shown in work surface boring and electrode three-dimensional coordinate schematic diagram 5.
2), after having designed boring and electrode coordinate, the base area electric theory point source three-dimensional electric field differential equation is:
σ represents electrical conductivity,Represent potential difference, I
Representing electric current, δ is Dirac function, (x0,y0,z0) it is position of source.(upper formula, z) for measuring the position of point, is made into by x, y
Form under the conditions of three-dimensional rectangular coordinate:
Above formula makes finite difference equations intoA is large-scale symmetric positive definite matrix,For the current potential on grid node to
Amount, b is supply terminals position vector；And utilize two-way conjugate gradient method to solve three-dimensional Potential distributionValue, solves three-dimensional electric field
Potential distribution process be process of just drilling.After D integral pin-fin tube completes, utilizing round and smooth method of least square to carry out inverting, inverting is gone to work
Make face formation resistivity scattergram, if Fig. 6 is across hole three-dimensional imaging resistivity map.As can be seen in Figure 6, in a model low
Resistance and resistance well show, and illustrate that this device plays a very important role in monitoring imaging.
3) drilling construction, in drilling construction:
A holes in work progress, and boring must use sleeve technology, uses non-metallic casing, and sleeve pipe aperture is less than boring
Both may be used in aperture, hole；Use the purpose of sleeve pipe: one is, prevent boring during drilling construction from collapse hole phenomenon occurring.Drilling construction
During, limit construction drill, limit setting of casing, this purpose is also for preventing collapse hole of holing.After two are drilling construction, boring
In need lay electrode, if use metal canula, all electrodes become an electrode, and monitoring device loses monitoring function；
B is when boring discloses water-bearing layer, it is necessary to water-bearing layer first carries out slip casting, plugging water-bearing stratum crack, closes aqueous
Layer hole section；Close intact after, again boring is constructed, continue to boring deep construction, until construction to drilling design deep
Degree position；
4) after drilling construction, electrode and cable are connected, and be placed in boring, at electrode and cable
Lower end adds a weight, it is therefore an objective to electrode and cable hole wall keeping parallelism state, makes electrode spacing impartial；When electrode and cable arrive
During at the bottom of hole and with hole wall keeping parallelism, its bottom is fixed, boring is carried out slip casting, electrode and cable are fixed on Kong Zhongshe
Meter position；
5) injection hole sealing and cable burial:
After preparation completes, injection hole sealing can be carried out, for slip casting is sealed, conventionally implement；Right
The mode of high-pressure slip-casting is taked in boring, it is necessary to solve problems with: cable must be high pressure resistant；Prevent joint from injecting in serosity；For
It is easy to cable connector draw, locates at sleeve pipe distance roadway floor 0.8m, design screw hole, cable connector drawn from hole,
And use nut to be screwed in hole；On roadway floor, dig 0.8m and firmly get cable trench, at cable transfer to main frame, just
In data acquisition；
6), after above equipment having been connected, equipment is carried out data acquisition inspection, after the assay was approved, carries out data acquisition
Work, after data acquisition completes, enters data into DC electrical method instrument, data is carried out pretreatment, after pretreatment completes, to not
With carrying out imaging between hole, monitor the effect of slip casting according to demand, in real time regulation grouting pressure and grouting amount, improve slip casting effect
Rate and precision；Fig. 7 to Fig. 9 be after certain grouting across hole 3-d inversion figure, as can be seen from the figure this grouting
Effect is pretty good, but now yet suffers from twice slip casting abnormal area.It is concentrated mainly on the tunnel adnexa that work surface y direction is 0
Position near 109m and left side and 219m, is next step slip casting key area herein.
After slip casting completes, this method can continue the method adopting work surface as monitoring, during working face extraction,
Monitoring face base plate Mining failure process in real time, until work surface safety coal extraction completes.
On the basis of the present invention utilizes traditional DC electrical method technology, by construction drill in work surface two tunnel,
Design a number of annular electrode and cable in boring, utilize plastic bushing electrode and cable to be fixed, then at sleeve pipe
Interior by electrode and cable inclosure boring, cable is introduced under roadway floor at hell, by default cable duct by electricity
Cable is incorporated into outside work surface, carries out the processes such as data acquisition process imaging, based on not in connecting cables to DC electrical method instrument
With realizing across hole three-dimensional-electroded method technology between boring, real-time monitoring face causes change in resistance feelings due to slip casting
Condition, makes rational slip casting arrangement according to monitoring situation, improves slip casting effect.After slip casting completes, work surface in exploitation process,
Can be with the change of monitoring face base plate regimen, forecast that floor undulation gushing water situation is made prediction, thus safeguard work face
Safe working.The present invention is both can be with monitoring face floor grouting effect, again can be with monitoring face Floor water end of love feelings
Condition, Method And Principle is simple, practical.
Apparatus of the present invention include work surface monitoring holes multiple (design according to demand), cable, annular electrode, electric method meter
The devices such as device.Wherein monitoring holes number designs according to length and the monitoring accuracy of work surface, the generally position of monitoring holes
Between 50-120m, the degree of depth of monitoring holes is greater than contains according to the depth design in stope water-bearing layer, the degree of depth of monitoring holes
Water layer is to the degree of depth of floor undulation.Cable needs compressive resistance, generally higher than 6-8Mpa；Each monitoring holes of length of cable
Cable will be connected to DC electrical method instrument position.Annular electrode number designs according to demand, it is desirable to electrode and cable junction
Connecting intact, junction seals.DC electrical method instrument can carry out gathering data across sky.
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines, but not the present invention is protected model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art are not
Need to pay various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. floor undulation is across a borescopic imaging device, it is characterized in that, arrange in being included in coal mine work area two tunnel is multiple
Monitoring holes, is equipped with a number of annular electrode and a cable in being fixed on plastic bushing in each monitoring holes, described
Annular electrode is uniformly connected on cable, and the cable in multiple monitoring holes is introduced into tunnel after connecting after drawing at monitoring aperture
Under base plate, cable is incorporated into outside work surface by the cable trench preset, the DC electrical method instrument that cable is connected to outside work surface；
The degree of depth of described monitoring holes is more than the degree of depth in water-bearing layer to floor undulation；Described annular electrode adds a weight with the bottom of cable
Thing, makes the hole wall keeping parallelism state of annular electrode and cable and monitoring holes, makes annular electrode spacing impartial.
2. floor undulation as claimed in claim 1 is across borescopic imaging device, it is characterized in that, the spacing between each two monitoring holes
Between 50-120m；Described monitoring holes is vertical boring or the boring tilted.
3. floor undulation as claimed in claim 1 is across borescopic imaging device, it is characterized in that, the compressive resistance of described cable is more than
6Mpa。
4. floor undulation as claimed in claim 1 is across borescopic imaging device, it is characterized in that, described electrode is copper annular electricity
Pole, by increasing capacitance it is possible to increase electrode and the contact surface of injecting paste material, makes electrode be fully contacted with extraneous medium.
5. floor undulation as claimed in claim 1 is across borescopic imaging device, it is characterized in that, is evenly arranged with in each monitoring holes
16 electrodes, the spacing between each two electrode is 5m, altogether 75m.
6. floor undulation as claimed in claim 1 is across borescopic imaging device, it is characterized in that, at the bottom of described plastic bushing distance tunnel
Below plate at 0.8m, being provided with screw hole, cable connector is drawn from this screw hole, and uses nut to be screwed on by this screw hole.
7. floor undulation as claimed in claim 1 is across borescopic imaging device, it is characterized in that, on described roadway floor, has dug
The cable trench that 0.8m is deep, cable is by the DC electrical method instrument that is incorporated into outside work surface of cable trench preset, it is simple to number
According to collection.
8. utilize floor undulation across the slip casting effect monitoring method of borescopic imaging device, it is characterized in that, comprise the following steps:
1) according to the situation of work surface, appropriate design boring in work surface about two two tunnel；
2) carry out, across hole three-dimensional imaging Forward Modeling and Inversion research, observing imaging effect, according to inversion imaging situation according to the boring of design
Determine the reasonability of boring；
3), after determining bore position, drilling construction is carried out:
A holes in work progress, and boring must use sleeve technology, uses non-metallic casing, and sleeve pipe aperture is less than drilling hole
Both may be used in footpath；
B is when boring discloses water-bearing layer, it is necessary to water-bearing layer first carries out slip casting, plugging water-bearing stratum crack, confining bed of aquifer hole
Section；Close intact after, again boring is constructed, continues to the construction of boring deep, until construction is to drilling design degree of depth position
Put；
4), after drilling construction, electrode and cable are connected；A weight is added, it is therefore an objective to electricity in the bottom of electrode Yu cable
Pole and cable hole wall keeping parallelism state, make electrode spacing impartial；
5) slip casting closure electrode and cable are holed and bury the cable picked out in boring underground；In order to ensure that data acquisition is normally adopted
Collection, by good to electrode and cable burial, it is ensured that data will be transmitted to main frame through cable.
6) detect the connection of package unit, connect intact after can carry out being normally carried out, across hole three-dimensional imaging, monitoring slip casting
Situation, carries out emphasis slip casting to slip casting defective region.
Utilize floor undulation across the slip casting effect monitoring method of borescopic imaging device the most as claimed in claim 8, it is characterized in that,
Described step 2) in across hole three-dimensional imaging Forward Modeling and Inversion particularly as follows:
The base area electric theory point source three-dimensional electric field differential equation is:
σ represents electrical conductivity,Representing potential difference, I represents that electric current, δ are Dirac functions, (x0,y0,z0) it is position of source, (x, y,
Z) for measuring the position of point into, upper formula is made form under the conditions of three-dimensional rectangular coordinate:
Above formula makes finite difference equations intoA is large-scale symmetric positive definite matrix,For the potential vectors on grid node, b
For supply terminals position vector；And utilize two-way conjugate gradient method to solve three-dimensional Potential distributionValue, solves the electricity of three-dimensional electric field
Position distributed process is process of just drilling；After D integral pin-fin tube completes, utilize round and smooth method of least square to carry out inverting, be finally inversed by work surface
Formation resistivity scattergram.
Utilize the monitoring method of floor undulation slip casting real-time monitoring device the most as claimed in claim 8, it is characterized in that, note
After having starched, continue monitoring and adopt work surface, during working face extraction, real-time monitoring face base plate Mining failure mistake
Journey, until work surface safety coal extraction completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610838457.9A CN106246162B (en) | 2016-09-21 | 2016-09-21 | Across the borescopic imaging device of floor undulation and slip casting effect monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610838457.9A CN106246162B (en) | 2016-09-21 | 2016-09-21 | Across the borescopic imaging device of floor undulation and slip casting effect monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246162A true CN106246162A (en) | 2016-12-21 |
| CN106246162B CN106246162B (en) | 2019-03-22 |
Family
ID=57600375
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610838457.9A Expired - Fee Related CN106246162B (en) | 2016-09-21 | 2016-09-21 | Across the borescopic imaging device of floor undulation and slip casting effect monitoring method |
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