CN109283225A - A kind of refuse landfill pollutant diffusion monitoring device based on resistivity CT imaging - Google Patents
A kind of refuse landfill pollutant diffusion monitoring device based on resistivity CT imaging Download PDFInfo
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- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 25
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 25
- 238000013170 computed tomography imaging Methods 0.000 title claims abstract description 18
- 238000012806 monitoring device Methods 0.000 title claims abstract description 13
- 238000009792 diffusion process Methods 0.000 title abstract description 3
- 238000005553 drilling Methods 0.000 claims abstract description 44
- 238000012544 monitoring process Methods 0.000 claims abstract description 43
- 238000005259 measurement Methods 0.000 claims description 12
- 239000010813 municipal solid waste Substances 0.000 claims description 8
- 239000004071 soot Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000007772 electrode material Substances 0.000 claims description 3
- 238000013523 data management Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 18
- 238000010276 construction Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000002547 anomalous effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000010291 electrical method Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
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- 230000005684 electric field Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
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- 238000004364 calculation method Methods 0.000 description 1
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- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005290 field theory Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
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- IYLGZMTXKJYONK-UHFFFAOYSA-N ruwenine Natural products O1C(=O)C(CC)(O)CC(C)C(C)(OC(C)=O)C(=O)OCC2=CCN3C2C1CC3 IYLGZMTXKJYONK-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
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Abstract
The invention belongs to Environmental Geophysics detection fields, a kind of refuse landfill pollutant diffusion monitoring device based on resistivity CT imaging is provided, the monitoring device utilizes resistivity CT imaging method between well, resistivity CT imaging is carried out in two mouthfuls of different drillings, carries out the monitoring of pollutant to refuse landfill using combined annular monitoring net, excitation, reception are easy, construction cost is low, monitoring range is wide, and work efficiency is high, while effectively increasing the precision of distinguishable pollutant range.
Description
Technical field
The invention belongs to Environmental Geophysics detection fields, and in particular to a kind of garbage loading embeading based on resistivity CT imaging
Field pollutant spreads monitoring device.
Background technique
The traditional environmental monitoring of refuse landfill depends on accurate perfect chemical analysis technology, such as AAS, ICP_MS,
But it is disadvantageous in that at high cost, time-consuming more, heavy workload.
Informal landfill is generally the low lying areas of specific " pot " type, and bottom lithology is uneven, such as contains the
Three be (such as attached drawings 2) such as sandstone, Carboniferous System limestone, Permian System silicalite.Refuse landfill containment body (country rock or the soil body) it is original
Resistivity (in the case where not having leakage) depends mainly on the size of lithology, granular size, water content, void ratio, class in containment body
Type and pore character etc. can predict and because these physical quantitys are substantially fixed, so, raw resistivity can be used as
The background value of refuse landfill.But if electrolyte solution contained by refuse landfill and the content of organic matter immerse containment body (containment body
Have crack, be crushed, in the case of non-tight), decline containment body resistivity value sharply, thus, the measurement of resistivity may determine that
Pollution channels and pollution level.
Known pollution channels, passageway perimeter soil pollution intensity of anomaly depend on the size of percolate ion concentration.Ion
Concentration is bigger, and the electric conductivity of underground water is stronger, and resistivity is just lower, so can be to Polluted Soil and non-by the difference of resistivity
Polluted Soil is distinguish.In addition under the erosion of acid diafiltration liquor, crystallizable mineral in soil increases dissolved solids and contains
Amount and soil porosity, later due to the lift action of underground water, a large amount of solids and sol particle enter in water, latent
The water surface is formed about a lenticular or stratiform anomalous body, with ion concentration, the increase of salt, dissolved solids, to electromagnetic wave
Reflection enhancement provides physical basis for electromagnetic surveying.
Since waste lump range is related with the size of resistivity, when resistivity is reduced, opposite pollution range increases
Greatly, resistivity CT imaging is applied effectively can intuitively to observe response of the soot pollutant range of scatter in resistivity,
Therefore it has broad application prospects in refuse landfill application resistivity CT device.
Summary of the invention
The purpose of the invention is to overcome the shortcomings of above-mentioned background technique, a kind of rubbish based on resistivity CT imaging is provided
Rubbish landfill pollutant spreads monitoring device, which utilizes the working principle of resistivity CT between well, at different two mouthfuls
Resistivity CT imaging is carried out in drilling, excitation, reception are easy, and construction cost is low, and monitoring range is wide, and work efficiency is high, has simultaneously
Effect improves the precision of distinguishable pollutant range.
In order to achieve the goal above, a kind of refuse landfill pollutant based on resistivity CT imaging provided by the invention expands
Monitoring device is dissipated, including resistivity monitoring system and external TT&C system between well；The multiple drillings of surrounding laying in soot, two
Drilling forms resistivity monitoring system between a set of well, and resistivity monitoring system is that arrangement is equidistant in a bite drilling between the well
The current electrode of arrangement, and the measuring electrode equidistantly arranged is arranged in another mouthful of drilling, it successively powers, sees to current electrode
Observation voltage is converted into apparent resistivity by the current potential for surveying measuring electrode, and difference drilling combination of two forms different monitoring systems,
Ultimately form the monitoring net being made of multiple monitoring systems；The external TT&C system is distributed measurement and control system.
In the above-mentioned technical solutions, the external TT&C system includes distributed relay measure and control device, resistivity measurement
Device, the distribution relay measure and control device are connected by cable with the measuring electrode arranged in drilling flatly, distribution after
Electric appliance measure and control device is connected with resistivity test device, and the resistivity test device passes through communication network and monitoring computer phase
Even, monitoring computer is for being converted to refuse landfill pollutant range of scatter for the resistivity signal of acquisition and carrying out at data
Reason analysis.
In the above-mentioned technical solutions, the electrode material between the well in two mouthfuls of drillings of resistivity observation system is copper electricity
Pole, and current electrode can be exchanged with measuring electrode.
In the above-mentioned technical solutions, described " in soot, surrounding lays multiple drillings " is the plane according to refuse landfill
Equal proportion lays multiple drillings that circular concentric is distributed to size from inside to outside, equal in the drilling that refuse landfill periphery is laid
Stratum certain thickness is squeezed into, the drilling laid above refuse landfill squeezes into ground after then passing through landfill pollutant and percolate
Layer certain thickness.
In the above-mentioned technical solutions, apparatus of the present invention are according to the area of plane size of refuse landfill equal proportion from inside to outside
The multiple drillings for laying circular concentric distribution, are put into electrode in each drilling, according to the working principle of resistivity CT between well,
Resistivity CT imaging is carried out in two mouthfuls of different drillings, independent two drilling forms resistivity monitoring system between a set of well, passes through
It converts different drilling and forms different monitoring systems, ultimately form the annular monitoring net being made of multiple monitoring systems.
Apparatus of the present invention take resistivity CT imaging method principle between well, using combined annular monitoring net to refuse landfill
Carry out the monitoring of pollutant, the control cost that the annular design of this method can be highly efficient, in identical hole number purpose feelings
Possess bigger monitoring area compared to other method for arranging under condition.
The present invention is based on beneficial effects possessed by its technical solution to be:
1, the present invention is using resistivity CT imaging method between well, and this method possesses excitation, receives and be easy relative to other methods,
The advantages that construction cost is low, to drilling without destruction.
2, the present invention possesses cost compared to other methods using the method for combined annular monitoring for refuse landfill
It is cheap, the advantages that monitoring range is wide, and work efficiency is high.
3, the electrode in combined annular monitoring net of the present invention uniformly equidistantly arranges in the borehole, which improves
The precision of distinguishable pollutant range.
4, this invention takes distributed TT&C system, which possesses the letter between monitoring computer and field device
The advantages that number interference that is subject to of connection is small, and system quality is high, easy to maintain.
5, the present invention takes combined annular resistivity CT to monitor, can since pollutant load size is inversely proportional with resistivity
More intuitively to show the range of refuse pollution.
Detailed description of the invention
Fig. 1 is refuse landfill monitoring region drilling layout diagram.
Fig. 2 is the schematic diagram of resistivity monitoring system between a set of well.
Fig. 3 is refuse landfill monitoring region centre section monitoring device schematic diagram.
Fig. 4 is the work flow diagram of monitoring device.
Fig. 5 is the schematic diagram that pole device apparent resistivity is sought using image method.
Wherein: 1. landfill pollutants, 2. stratum, 3. drillings, 4. current electrodes or measuring electrode.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig.1, the refuse landfill in the present embodiment is mainly made of waste lump main body and percolate, pollutant
Main body be one layer of rubbish, one layer of earthing, soot plane be irregular figure, it is first determined the rough center of refuse landfill
Position lays first drilling ZK0 in center, is set as centre-drilling hole,
Then it centered on the ZK0 that drills, is laid respectively to eight directions inside soot approximate with centre-drilling hole radius flatly
Identical drilling ZK1-1 ~ ZK1-8 constitutes the first lap concentric circles of periphery, while in refuse landfill periphery similarly to do
Method lays drilling ZK2-1 ~ ZK2-8, constitutes the distribution of boreholes of two circle concentric circles to carry out annular observation.Two different brills
Hole constitutes resistivity monitoring system between a set of well, carries out cross-borehole CT imaging, the different groups two-by-two that drill to two different drillings respectively
It is combined into different monitoring systems, combined annular monitoring net is finally constituted and reaches monitoring to underground waste lump.
Referring to Fig. 2, resistivity monitoring system is to arrange the current electrode equidistantly arranged in a bite drilling between the well,
And the measuring electrode equidistantly arranged is arranged in another a well, the spacing of electrode is generally calculated according to well depth, generally
It is the 1/30 ~ 1/20 of well depth, successively powers to current electrode, observe the current potential of measuring electrode, be then converted into observation voltage
Apparent resistivity.Electrode material is copper electrode in two mouthfuls of drillings, and current electrode can be exchanged with measuring electrode position,
Obtain more accurate monitoring data.
It is driven underground referring to Fig. 3, the drilling ZK2-1, ZK2-5 on refuse landfill periphery across stratum certain thickness, rubbish
Drilling ZK1-1, ZK0, ZK1-5 above rubbish landfill yard then pass through that enter stratum after landfill pollutant and percolate centainly thick
Degree.Drill ZK2-1 shown on the section, ZK1-1, ZK0, and ZK1-5, ZK2-5 can be used as current electrode and measuring electrode, leads to
Crossing external TT&C system can control resistivity measurement between drilling progress well two-by-two.
Referring to Fig. 4, external TT&C system is a kind of distributed measurement and control system.Host is Chongqing geological instrument in the present embodiment
Factory's DUK-2A high density electric prospecting system is converted including DZD-6A multifunctional DC electrical method instrument and MIS-60 multi-electrode
Device, MIS-60 multi-electrode converter are connected by the measuring electrode arranged in cable and drilling, the conversion of MIS-60 multi-electrode
Device is connected with DZD-6A multifunctional DC electrical method instrument, and MIS-60 multi-electrode converter and DZD-6A multifunctional DC electrical method instrument are used
In realizing downhole data acquisition, DZD-6A multifunctional DC electrical method instrument is connected by communication network with monitoring computer, monitoring meter
Calculation machine is for being converted to refuse landfill pollutant range of scatter for the resistivity signal of acquisition and carrying out Data Management Analysis.Tool
Body method is as follows:
(1) it is based on Static Electric Field Theory, electric measuring method belongs to " transmission " working method between well, when anomalous body is close to power supply point source,
Anomalous body attracts or repels electric current strong, and field distribution distortion is serious, and measurement point is able to reflect this variation.It is mutual according to electric field
Principle is changed, when anomalous body is close to receiving point, the electrical property feature of anomalous body can also seriously affect the current potential of measurement point.In order to
This distribution characteristics for spatially sufficiently showing electric field between well proposes geometry imaging thought between a kind of well: first with mirror image
Method finds out apparent resistivity value corresponding with all current potentials, and then to observe well depth as ordinate, well depth of powering is abscissa drafting
Apparent resistivity isoline figure.On isogram, those traps are exactly the position of anomalous body, it is this diagram reflect supply terminals and
Mapping relations between measurement point.
(2) as shown in figure 5, when powering in a well, position is distinguished in another mouthful of borehole measurement, i.e. supply terminals A and observation point M
When in Liang Koujing, it is evident that ground boundary will affect the current distribution of point source A, to influence the current potential of M point.
(3) in order to eliminate the influence on ground boundary, we calculate the apparent resistivity at M point using image method.Assuming that ground
There are an empty power supply A ' in top and the symmetrical position A, and the distance between supply terminals A and measurement point M are r, empty power supply A ' and measurement
The distance between point M ' be r ', the direction x is parallel to the ground, z-axis perpendicular to ground downwards.
(4) it is apparent from by geological theorems
Wherein, Mx, MzCoordinate of the respectively M point in the direction x and the direction z；Ax, AzCoordinate of the respectively A point in the direction x and the direction z；
It is by the current potential that direct current point source formula can obtain observation point M
WhereinFor apparent resistivity, I is the current strength of power supply A；
(5) refuse landfill field data is parsed into figure
The resistivity data of field acquisition carries out data processing and mainly the data of electrical method is utilized to handle, and mainly uses Res2dinv
Software and surfer software carry out, will the apparent resistivity data that measured delete after the excessive point of error using Res2dinv software into
Resistivity profile can be obtained in inverting of having gone, and carries out data interpolating using surfer software and obtains gridding file, by gridding
File is depicted as isogram, and wherein horizontal axis indicates the vertical range between two wells, and the longitudinal axis indicates the depth of section, unit lg
Ω m, wherein logarithm contour interval is chosen in the drafting of isopleth.
The content being not described in detail in this specification belongs to the prior art well known to those skilled in the art.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of refuse landfill pollutant based on resistivity CT imaging spreads monitoring device, it is characterized in that: including electricity between well
Resistance rate monitors system and external TT&C system；Multiple drillings are laid in refuse landfill surrounding, two drillings form between a set of well
Resistivity monitoring system, resistivity monitoring system is to arrange the current electrode equidistantly arranged in a bite drilling between the well,
And the measuring electrode equidistantly arranged is arranged in another mouthful of drilling, it successively powers to current electrode, observes the electricity of measuring electrode
Observation voltage is converted into apparent resistivity by position, and difference drilling combination of two forms different monitoring systems, ultimately forms by multiple
The monitoring net that monitoring system is constituted；The external TT&C system is distributed measurement and control system.
2. the refuse landfill pollutant according to claim 1 based on resistivity CT imaging spreads monitoring device, special
Sign is: the external TT&C system includes distributed relay measure and control device, resistivity test device, the distribution relay
Measure and control device is connected by the measuring electrode arranged in cable and a bite drilling, and distributed relay measure and control device and resistivity are surveyed
It measures device to be connected, the resistivity test device is connected by communication network with monitoring computer, and monitoring computer will be for that will adopt
The resistivity signal of collection is converted to refuse landfill pollutant range of scatter and carries out Data Management Analysis.
3. the refuse landfill pollutant according to claim 1 based on resistivity CT imaging spreads monitoring device, special
Sign is: the electrode material between the well in two mouthfuls of resistivity monitoring system drillings is copper electrode, and measuring electrode and is supplied
Electrode can be exchanged.
4. the refuse landfill pollutant according to claim 1 based on resistivity CT imaging spreads monitoring device, special
Sign is: " in soot, surrounding lays multiple drillings " is to wait ratios from inside to outside according to the area of plane size of refuse landfill
Example lays multiple drillings of circular concentric distribution, squeezes into stratum certain thickness, rubbish in the drilling that refuse landfill periphery is laid
The drilling laid above rubbish landfill yard squeezes into stratum certain thickness after then passing through landfill pollutant and percolate.
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Cited By (3)
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| CN110865247A (en) * | 2019-11-22 | 2020-03-06 | 上海应用技术大学 | Finite space electric field distribution determining method and system |
| CN113533444A (en) * | 2021-07-19 | 2021-10-22 | 中国矿业大学(北京) | Annular observation system and method for landfill percolation channel by resistivity method |
| CN113720880A (en) * | 2021-08-11 | 2021-11-30 | 河海大学 | Resistivity monitoring system and method for underground three-dimensional migration process of pollutants |
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| CN113720880A (en) * | 2021-08-11 | 2021-11-30 | 河海大学 | Resistivity monitoring system and method for underground three-dimensional migration process of pollutants |
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