CN106246162B - Across the borescopic imaging device of floor undulation and slip casting effect monitoring method - Google Patents
Across the borescopic imaging device of floor undulation and slip casting effect monitoring method Download PDFInfo
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- CN106246162B CN106246162B CN201610838457.9A CN201610838457A CN106246162B CN 106246162 B CN106246162 B CN 106246162B CN 201610838457 A CN201610838457 A CN 201610838457A CN 106246162 B CN106246162 B CN 106246162B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000003384 imaging method Methods 0.000 title claims abstract description 34
- 230000000694 effects Effects 0.000 title claims abstract description 24
- 238000007569 slipcasting Methods 0.000 title claims description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003245 coal Substances 0.000 claims abstract description 15
- 238000005553 drilling Methods 0.000 claims description 64
- 230000008569 process Effects 0.000 claims description 24
- 238000010276 construction Methods 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 19
- 238000005516 engineering process Methods 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 9
- 238000005065 mining Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 7
- 230000005684 electric field Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000013598 vector Substances 0.000 claims description 4
- 238000009933 burial Methods 0.000 claims description 3
- 238000002939 conjugate gradient method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 2
- 238000010291 electrical method Methods 0.000 abstract description 16
- 230000008859 change Effects 0.000 abstract description 9
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK 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
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Abstract
The invention discloses a kind of across the borescopic imaging devices of floor undulation, including the multiple monitoring holes being arranged in two tunnel of coal mine work area, it is equipped in each monitoring holes and is fixed on a certain number of annular electrodes and a cable in plastic bushing, the annular electrode is uniformly connected on cable, under cable in multiple monitoring holes is introduced into roadway floor after connecting after drawing at monitoring aperture, cable is introduced into outside working face by preset cable trench, the DC electrical method instrument outside cable connection to working face；The depth of the monitoring holes is greater than water-bearing layer to the depth of floor undulation；The bottom of the annular electrode and cable adds a weight, makes the hole wall keeping parallelism state of annular electrode and cable and monitoring holes, keeps annular electrode spacing impartial.The invention also discloses utilize monitoring method of the floor undulation across borescopic imaging device.The device and method not only can be with monitoring face floor grouting effect, but also 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 across borescopic imaging device of floor undulation
And slip casting effect monitoring method.
Background technique
In recent years, being continuously increased with coal mining depth, North China type coalfield superficial part coal seam, which is almost exploited, to be finished, mine
Deep fractures are happened occasionally due to the threat by high artesian, thin water barrier, water bursting in mine.North China type coalfield deposits coal seam one
As belong to coking coal, and coking coal is steel-making necessary article, and other coals are not replaceable.Therefore, North China type coalfield deep how is liberated
Mine is become the important subject that current mine water is prevented and treated by the coal seam of high artesian, thin water barrier.
Floor undulation slurry injection technique is the important method for solving to mine on high artesian.Traditional slurry injection technique method is
The shortcomings that method for carrying out slip casting using uniform drilling, this method: grouting amount is big, slip casting low efficiency, during slip casting not
It can accomplish to shoot the arrow at the target, slip casting effect is bad.With the development of technology, before slip casting, many technical staff use geophysics skill
The situation of change for the rock stratum that art is detected, to progress grouting and reinforcing at floor undulation thin water layer.This method is compared with the traditional method,
The patent can not only monitor the variation of slip casting process really, but also by the slip casting situation of entire working face, can by three-dimensional
It is shown depending on change system, slip casting weakness zone is especially presented to mine water prevention and treatment person in real time, prevention and treatment person can be according to scene
Slip casting improvement project is made in variation, slip casting efficiency not only can be improved, but also can save injecting paste material, this is that other methods can not solve
's.
The a part of Chinese patent application 201210038167 using transient electromagnetic apparatus as working face measuring point network, wink
It is sensitive to post non of low resistance body to become electromagnetic apparatus advantage, detection accuracy rate is high；But the disadvantage is that being affected by the surrounding environment, big, interference is more,
It is influenced especially in exploitation process by " low-resistance interfering bodies ", there are problems for data reliability, and not only monitoring is inaccurate, be easy to cause
False anomaly influences the normal back production of working face；In addition the patent carries out emphasis monitoring to working face key area, and key area is only
It is to speak of in general terms, key area is formed by formation damage without reference to mine pressure in mining active process, more without reference to work
The problem of making face slip casting.
Chinese patent application 201310728093 prevents water sand body is prominent from gushing mainly for coal mining under water bodies, improves seam mining
The upper limit and the experimental design carried out, belong to a kind of special circumstances of roof water inrush, do not have the real-time of grouting and regimen
The universal significance of dynamic monitoring.
Chinese patent application 201410529007,201410529019,201510134024, three above patent are mainly
For the research work face plate destructing depth in mining active process, although plate destructing depth is to the occurrence status of bottom plate regimen
With certain influence, but plate destructing depth and grouting and regimen are two completely different concepts, therefore, no
Plate destructing depth can be monitored to the real-time monitoring for being considered as working face regimen.Disclosed working face water regime monitoring, party's law technology
Project plan comparison is complicated, and execute-in-place cost is big, is changed using transient electromagnetic monitoring face regimen, and acquisition data reliability is low,
Monitoring effect is poor.The patent is to realize the monitoring of water burst in face hydrogeologic condition, for starching during grouting
The changing rule of liquid is helpless.
Chinese patent 200920143376.2 discloses a kind of system of high-density resistivity monitoring crag relaxation zone, it is
First multiple section boreholes in country rock tunnel bury multicore cable and exhaust pipe with electrode in hole, with grouting device
Couplant will be filled in drilling, measures multiple groups resistivity data by being connected to the resistivity meter of outer end of multiple conductor cable, finally
Wall rock loosening ring is realized according to collected data application High Density Resistivity and is monitored.The patent is only in high density electricity
The problem of changing cloth pole method and observation device on the traditional infrastructure of method, can only simply measure tunnel change in resistance, with work
It is different to make face bottom plate imaging device, there are essential distinctions for grouting effect method of real-time.Floor undulation note
Slurry is not only dynamic process, and is related to 3 dimension imaging technology and method, from drilling construction to the design of entire observation device,
200920143376.2 patent is not related to.
The monitoring and prediction that Chinese patent 201420786793.X discloses a kind of coal working face top, water inrush from floor fills
It sets, which includes several electrodes being arranged in orientation concordant drilling and two infinity electricity being arranged in tunnel
Several are arranged in pole, the orientation concordant drilling, and each orientation concordant drills from face roof or bottom plate, or part
The top plate or bottom plate of dangerous section extend to underground at least two layers；Several described electrodes and two infinite electrodes pass through logical
News cable is connect with the processor that ground is arranged.201420786793.X patent is the simple connection for changing electrode and cable
Method removes monitoring water damage device, is not different with traditional mine direct current two dimension electrical method, a section can only be presented, cannot be entirely square
Position observation grouting situation, therefore, floor undulation slip casting effect cannot be guaranteed.
Summary of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of across borescopic imaging device of floor undulation
And slip casting effect monitoring method, the device and method not only can be with monitoring face floor grouting effects, but also it can be with monitoring face
Floor water feelings situation of change, Method And Principle is simple, practical.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of across borescopic imaging device of floor undulation, including the multiple monitoring holes being arranged in two tunnel of coal mine work area,
It is equipped in each monitoring holes and is fixed on a certain number of annular electrodes and a cable, the annular electrode in plastic bushing
It is uniformly connected on cable, after the cable in multiple monitoring holes is drawn at monitoring aperture, introduces under roadway floor, cable passes through
Preset cable trench is introduced into outside working face, the DC electrical method instrument outside cable connection to working face；
The depth of the monitoring holes is greater than floor undulation water-bearing layer to the depth of floor undulation；
The bottom of the annular electrode and cable adds a weight, keeps the hole wall of annular electrode and cable and monitoring holes
Parastate keeps annular electrode spacing impartial.
Spacing between every two monitoring holes is between 50-120m.
The compressive resistance of the cable is greater than 6Mpa.
The monitoring holes are vertical drilling or inclined drilling.
The electrode is copper circular ring electrode, can increase the contact surface of electrode and injecting paste material, makes electrode and the external world
Medium comes into full contact with.
15 electrodes are evenly arranged in each monitoring holes, the spacing between every two electrode is 5m, total 75m.
The plastic bushing is equipped with screw hole at 0.8m below roadway floor, and cable connector draws from the screw hole
Out, and using nut by the screw hole it screws on.
On the roadway floor, the cable trench of 0.8m depth is dug, cable introduces work by preset cable trench
Make at the DC electrical method instrument outside face, is acquired convenient for data.
Slip casting effect monitoring method using floor undulation across borescopic imaging device, comprising the following steps:
1) according to working face the case where rationally designs drilling in about two two tunnel of working face；
2) across hole three-dimensional imaging Forward Modeling and Inversion research is carried out according to the drilling of design, imaging effect is observed, according to inversion imaging
Situation determines the reasonability of drilling；
3) after determining bore position, drilling construction is carried out:
A drills in the construction process, and drilling must use sleeve technology, and using non-metallic casing, casing aperture, which is less than, is bored
Both may be used in hole aperture；
B is when drilling discloses water-bearing layer, it is necessary to first carry out slip casting to water-bearing layer, plugging water-bearing stratum crack is closed aqueous
Layer hole section；Close it is intact after, construct again to drilling, continue to construct to drilling deep, until construction is deep to drilling design
Spend position；
4) after drilling construction, electrode and cable connection is good；Add a weight, purpose in the bottom of electrode and cable
It is electrode and cable hole wall keeping parallelism state, keeps electrode spacing impartial；
5) slip casting blocks in electrode and cable drilling and embedded drilling and picks out the cable come；In order to guarantee that data acquisition is normal
Acquisition is good by electrode and cable burial, it is ensured that data will be transmitted to host through cable.
6) connection for detecting package unit, can be normally carried out across hole three-dimensional imaging after connection is intact, be monitored
Slip casting situation carries out emphasis slip casting to slip casting defective region.
Across hole three-dimensional imaging Forward Modeling and Inversion in the step 2) specifically:
The base area electric theory point source three-dimensional electric field differential equation are as follows:
σ indicates conductivity,Indicate potential difference, I indicates electric current, and δ is Dirac function, (x0,y0,z0) it is position of source,
(x, y, z) is the position of measurement point, and upper formula is changed to format under the conditions of three-dimensional rectangular coordinate:
Above formula is changed to finite difference equationsA is large-scale symmetric positive definite matrix,For the current potential on grid node to
Amount, b are supply terminals position vector；And three-dimensional Potential distribution is solved using two-way conjugate gradient methodValue, solves three-dimensional electric field
Potential distribution process is forward modeling process；After the completion of D integral pin-fin tube, inverting is carried out using round and smooth least square method, is finally inversed by work
Face formation resistivity distribution map.
After the completion of slip casting, this method can continue the method for adopting working face as monitoring, during working face extraction,
Real-time monitoring floor undulation Mining failure process, until working face safety coal extraction is completed.
On the basis of the present invention utilizes traditional DC electrical method technology, by the construction drill in two tunnel of working face,
The a certain number of annular electrodes of design and cable, are fixed electrode and cable using plastic bushing, then in casing in drilling
It is interior to enclose electrode and cable in drilling, it, will be electric by preset cable duct under cable is introduced roadway floor at hell
Cable is introduced into outside working face, is connected cables to and is carried out the processes such as data acquisition process imaging in DC electrical method instrument, based on not
With across hole three-dimensional-electroded method technology is realized between drilling, real-time monitoring working face causes change in resistance feelings due to slip casting
Condition makes reasonable slip casting arrangement according to monitoring situation, improves slip casting effect.After the completion of slip casting, working face in exploitation process,
It can be made prediction forecast to floor undulation gushing water situation, thus safeguard work face with the variation of monitoring face bottom plate regimen
Safe working.The present invention is not only can be with monitoring face floor grouting effect, but also can be with monitoring face Floor water end of love feelings
Condition, Method And Principle is simple, practical.
Apparatus of the present invention include working face monitoring holes multiple (designing according to demand), cable, annular electrode, electric method meter
The devices such as device.Wherein monitoring holes number is designed according to the length and monitoring accuracy of working face, under normal circumstances the position of monitoring holes
Between 50-120m, according to the depth design in stope water-bearing layer, the depth of monitoring holes is greater than to be contained the depth of monitoring holes
Depth of the water layer to floor undulation.Cable requires compressive resistance, generally higher than 6-8Mpa；Each monitoring holes of the length of cable
Cable will be connected to DC electrical method instrument position.Annular electrode number designs according to demand, it is desirable that at electrode and cable connection
Connect intact, junction sealing.DC electrical method instrument, which is able to carry out, acquires data across sky.
Detailed description of the invention
Fig. 1 is grouting drilling design schematic diagram of the present invention；
Fig. 2 is monitoring holes structural schematic diagram of the present invention；
Fig. 3 is 200m × 100m working face of the present invention across empty imaging model；
Fig. 4 is 200m × 100m of the present invention across empty Scattering data figure；
Fig. 5 is across the borescopic imaging model of certain working face of the invention；
Fig. 6 is across the borescopic imaging model inversion figure of certain working face of the invention；
Fig. 7 is across borescopic imaging inversion chart after certain grouting of the invention；
Fig. 8 is across borescopic imaging Z-direction dropping cut slice after certain grouting of the invention；
Fig. 9 is across borescopic imaging X-direction terrace cut slice after certain grouting of the invention；
Wherein, 1. monitoring holes, 101. screw holes, 102. annular electrodes, 103. plastic bushings, 2. cables, 3. DC electrical methods
Instrument.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
This specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate specification revealed interior
Hold, so that those skilled in the art understands and reads, is not intended to limit the invention enforceable qualifications, therefore does not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size can be produced not influencing the present invention
Under raw effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, be merely convenient to
Narration is illustrated, rather than to limit the scope of the invention, relativeness is altered or modified, without substantive change
Under technology contents, when being also considered as the enforceable scope of the present invention.
As Figure 1-Figure 2, across the borescopic imaging device of floor undulation is more including being arranged in two tunnel of coal mine work area
A monitoring holes 1 are equipped in each monitoring holes 1 and are fixed in plastic bushing 103 a certain number of annular electrodes 102 and one
Cable 2, the annular electrode 102 are uniformly connected on cable 2, after the cable 2 in multiple monitoring holes 1 is drawn at monitoring aperture
It is introduced under roadway floor after series connection, cable 2 is introduced into outside working face by preset cable trench, and cable 2 is connected to work
DC electrical method instrument 3 outside face；The depth of the monitoring holes 1 is greater than water-bearing layer to the depth of floor undulation；The annular electro
Pole 102 and the bottom of cable 2 add a weight, make the hole wall keeping parallelism state of annular electrode 102 and cable 2 and monitoring holes 1,
Keep 102 spacing of annular electrode impartial.
Spacing between every two monitoring holes 1 is between 50-120m.The compressive resistance of the cable 2 is greater than 6Mpa.Monitoring holes
1 is vertical drilling or inclined drilling.
Annular electrode 102 is copper circular ring electrode, can increase the contact surface of electrode and injecting paste material, makes electrode and outer
Boundary's medium comes into full contact with.
16 annular electrodes are evenly arranged in each monitoring holes 1, the spacing between every two annular electrode is 5m, altogether
75m。
Plastic bushing 103 is equipped with screw hole 101 at 0.8m below roadway floor, and cable connector is from the screw hole 101
Middle extraction, and screwed on the screw hole using nut.
On roadway floor, the cable trench of 0.8m depth is dug, cable 2 introduces working face by preset cable trench
At outer DC electrical method instrument 3, acquired convenient for data.
Slip casting effect monitoring method using floor undulation across borescopic imaging device, comprising the following steps:
1) according to the actual conditions of working face, drilling is rationally designed in about two two tunnel of working face；Design certain work
The a length of 328m in face, width are the working face of 110m, design 8 drillings, upper and lower each 4 drilling in tunnel altogether, and each drilling uses electrode
15,120 electrodes are used altogether, shown in working face drilling and electrode three-dimensional coordinate schematic diagram 5.
2) after drilling and electrode coordinate are completed in design, the base area electric theory point source three-dimensional electric field differential equation are as follows:
σ indicates conductivity,Indicate potential difference, I
Indicate electric current, δ is Dirac function, (x0,y0,z0) it is position of source.(x, y, z) is the position of measurement point, and upper formula is changed to
Format under the conditions of three-dimensional rectangular coordinate:
Above formula is changed to finite difference equationsA is large-scale symmetric positive definite matrix,For the current potential on grid node to
Amount, b are supply terminals position vector；And three-dimensional Potential distribution is solved using two-way conjugate gradient methodValue solves three-dimensional electric field
Potential distribution process be forward modeling process.After the completion of D integral pin-fin tube, inverting is carried out using round and smooth least square method, inverting is gone to work
Make face formation resistivity distribution map, 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 are shown well, illustrate that the device plays a very important role in monitoring imaging.
3) drilling construction, in drilling construction:
A drills in the construction process, and drilling must use sleeve technology, and using non-metallic casing, casing aperture, which is less than, is bored
Both may be used in hole aperture；Use the purpose of casing: first is that, prevent drilling during drilling construction from collapse hole phenomenon occur.Drilling construction
In the process, side construction drill, side setting of casing, this purpose also for prevent drilling collapse hole.Second is that after drilling construction, drilling
In need to be laid with electrode, if all electrodes become an electrode using metal sleeve, monitoring device loses monitoring function；
B is when drilling discloses water-bearing layer, it is necessary to first carry out slip casting to water-bearing layer, plugging water-bearing stratum crack is closed aqueous
Layer hole section；Close it is intact after, construct again to drilling, continue to construct to drilling deep, until construction is deep to drilling design
Spend position；
4) after drilling construction, electrode and cable connection is good, and place it in drilling, electrode and cable most
Lower end adds a weight, it is therefore an objective to which electrode and cable hole wall keeping parallelism state keep electrode spacing impartial；When electrode and cable reach
Bottom hole and when with hole wall keeping parallelism, its bottom end is fixed, slip casting is carried out to drilling, electrode and cable is fixed on Kong Zhongshe
Count position；
5) injection hole sealing and cable burial:
After the completion of preparation, injection hole sealing can be carried out, for slip casting sealing, is conventionally implemented；It is right
The mode of high-pressure slip-casting is taken in drilling, it is necessary to solve following problems: cable must be high pressure resistant；It prevents in connector injection slurries；For
It is drawn convenient for cable connector, in casing apart from roadway floor 0.8m at, design screw hole draws cable connector from hole,
And hole is screwed on using nut；On roadway floor, digs 0.8m and firmly get cable trench, by cable transfer at host, just
It is acquired in data；
6) by after the completion of the connection of the above equipment, data acquisition is carried out to equipment and is examined, after the assay was approved, carries out data acquisition
Work enters data into DC electrical method instrument, pre-processes to data, after the completion of pretreatment, to not after the completion of data acquisition
With the effect of slip casting across being imaged between hole, is monitored according to demand, grouting pressure and grouting amount are adjusted in real time, improve slip casting effect
Rate and precision；Fig. 7 to Fig. 9 is across the hole 3-d inversion figure after certain grouting, as can be seen from the figure the grouting
Effect is pretty good, but there are still slip casting abnormal areas twice at this time.It is concentrated mainly on the tunnel attachment that the direction working face y is 0
109m and left side and 219m neighbouring position are next step slip casting key area herein.
After the completion of slip casting, this method can continue the method for adopting working face as monitoring, during working face extraction,
Real-time monitoring floor undulation Mining failure process, until working face safety coal extraction is completed.
On the basis of the present invention utilizes traditional DC electrical method technology, by the construction drill in two tunnel of working face,
The a certain number of annular electrodes of design and cable, are fixed electrode and cable using plastic bushing, then in casing in drilling
It is interior to enclose electrode and cable in drilling, it, will be electric by preset cable duct under cable is introduced roadway floor at hell
Cable is introduced into outside working face, is connected cables to and is carried out the processes such as data acquisition process imaging in DC electrical method instrument, based on not
With across hole three-dimensional-electroded method technology is realized between drilling, real-time monitoring working face causes change in resistance feelings due to slip casting
Condition makes reasonable slip casting arrangement according to monitoring situation, improves slip casting effect.After the completion of slip casting, working face in exploitation process,
It can be made prediction forecast to floor undulation gushing water situation, thus safeguard work face with the variation of monitoring face bottom plate regimen
Safe working.The present invention is not only can be with monitoring face floor grouting effect, but also can be with monitoring face Floor water end of love feelings
Condition, Method And Principle is simple, practical.
Apparatus of the present invention include working face monitoring holes multiple (designing according to demand), cable, annular electrode, electric method meter
The devices such as device.Wherein monitoring holes number is designed according to the length and monitoring accuracy of working face, under normal circumstances the position of monitoring holes
Between 50-120m, according to the depth design in stope water-bearing layer, the depth of monitoring holes is greater than to be contained the depth of monitoring holes
Depth of the water layer to floor undulation.Cable requires compressive resistance, generally higher than 6-8Mpa；Each monitoring holes of the length of cable
Cable will be connected to DC electrical method instrument position.Annular electrode number designs according to demand, it is desirable that at electrode and cable connection
Connect intact, junction sealing.DC electrical method instrument, which is able to carry out, acquires data across sky.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (2)
1. utilizing slip casting effect monitoring method of the floor undulation across borescopic imaging device, characterized in that the following steps are included:
1) according to working face the case where rationally designs drilling in about two two tunnel of working face；
2) across hole three-dimensional imaging Forward Modeling and Inversion research is carried out according to the drilling of design, imaging effect is observed, according to inversion imaging situation
Determine the reasonability of drilling；
Across hole three-dimensional imaging Forward Modeling and Inversion specifically:
The base area electric theory point source three-dimensional electric field differential equation are as follows:
σ indicates conductivity,Indicate potential difference, I indicates electric current, (x0,y0,z0) it is position of source, (x, y, z) is the position of measurement point
It sets, upper formula is changed to format under the conditions of three-dimensional rectangular coordinate:
U indicates that current potential, above formula are changed to finite difference equations and areA is large-scale symmetric positive definite matrix,For on grid node
Potential vectors, b be supply terminals position vector；And three-dimensional Potential distribution is solved using two-way conjugate gradient methodValue solves
The Potential distribution process of three-dimensional electric field is forward modeling process；After the completion of D integral pin-fin tube, inverting is carried out using round and smooth least square method,
It is finally inversed by working face formation resistivity distribution map；
3) after determining bore position, drilling construction is carried out:
A drills in the construction process, and drilling must use sleeve technology, and using non-metallic casing, casing aperture is less than drilling hole
Diameter；
B is when drilling discloses water-bearing layer, it is necessary to first carry out slip casting, plugging water-bearing stratum crack, confining bed of aquifer hole section to water-bearing layer；
Close it is intact after, construct again to drilling, continue to drilling deep construct, until construction arrive drilling design depth location；
4) after drilling construction, electrode and cable connection is good；Add a weight in the bottom of electrode and cable, it is therefore an objective to electricity
Pole and cable hole wall keeping parallelism state keep electrode spacing impartial；
5) slip casting blocks in electrode and cable drilling and embedded drilling and picks out the cable come；In order to guarantee that data acquisition is normally adopted
Collection is good by electrode and cable burial, it is ensured that data will be transmitted to host through cable；
6) connection for detecting package unit, can carry out normally across hole three-dimensional imaging after connection is intact, monitor slip casting situation,
Emphasis slip casting is carried out to slip casting defective region.
2. utilizing slip casting effect monitoring method of the floor undulation across borescopic imaging device as described in claim 1, characterized in that
After the completion of slip casting, continues monitoring and adopt working face, during working face extraction, real-time monitoring floor undulation Mining failure mistake
Journey, until working face safety coal extraction is completed.
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| CN110206534A (en) * | 2019-06-06 | 2019-09-06 | 张同德 | Across inclined hole resistivity CT imaging injection hole sealing cable protecting device and application method |
| CN110821475B (en) * | 2019-11-28 | 2023-04-25 | 中煤科工集团西安研究院有限公司 | Drilling resistivity monitoring method for coal mine working face bottom plate and cable pushing device |
| CN114370071A (en) * | 2021-11-29 | 2022-04-19 | 北京恒祥宏业基础加固技术有限公司 | Device, system and method for monitoring controllable grouting reinforcement of existing building in real time |
| CN115306367B (en) * | 2022-08-19 | 2023-11-21 | 陕西省煤田地质集团有限公司 | Underground in-situ conversion and economical evaluation method for oil-rich coal |
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