CN205958769U - Three -dimensional parallel electric method observation system based on a plurality of drillings and ground are arranged in step - Google Patents
Three -dimensional parallel electric method observation system based on a plurality of drillings and ground are arranged in step Download PDFInfo
- Publication number
- CN205958769U CN205958769U CN201621012716.4U CN201621012716U CN205958769U CN 205958769 U CN205958769 U CN 205958769U CN 201621012716 U CN201621012716 U CN 201621012716U CN 205958769 U CN205958769 U CN 205958769U
- Authority
- CN
- China
- Prior art keywords
- electrode
- ground
- observation system
- hole
- parallel electrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a three -dimensional parallel electric method observation system based on a plurality of drillings and ground are arranged in step. Three -dimensional parallel electric method observation system include the ground electrode group and with a plurality of drillings corresponding a plurality of holes in the electrode cluster. The electrode cluster sets up in the hole: set up an electrode cluster during every is holed, the electrode cluster comprises a plurality of constant spacing's electrode, and its length is L, and the electrode cluster lies in corresponding drilling bottom, and the interval between each electrode during fixed electrode goes here and there admittedly, the position of electrode in corresponding drilling in the fixed drilling. The ground electrode group sets up: latticed electrode group setting is subaerial, and interval in the latticed electrode group between each electrode is the plane scope that an and net scope covered electrode place drilling in the hole respectively. The utility model discloses can stride hole electricity method CT detection to the porous three -dimensional of carrying on simultaneously to combining the terrestrial network trellis to arrange the electrode, forming the complete three -dimensional observation system in ground and the hole, the coverage is bigger, to obtain the data volume huge.
Description
Technical field
This utility model is related to a kind of three-dimensional parallel electrical method observation system, and more particularly, to one kind is based on multiple borings and ground
The three-dimensional parallel electrical method observation system of synchronization arrangement.
Background technology
Underground is lain concealed geologic body such as solution cavity, boulder etc. and is had larger threat to various engineering projects, and particularly some are little
Scope, region that ground survey line cannot be arranged typically all can be reconnoitred construction drill, such as the karst cavity below highway is asked
Topic, can frequently result in subsiding of road surface, the people's lives and property is constituted a serious threat；Orphan in front of shield machine during shield
Stone etc. constitutes material risk etc. to the driving of shield machine, therefore how to find out the latent geology in underground of the fine requirement of this small range
Body is of crucial importance.
For problems, current method for surveying is geophysical method and probing method, and probing is for partial points position
It is more accurate that geological condition discloses, but the geological condition for continuum is difficult to disclose, and has the limitation of " a peephole view ".
Hidden danger distribution situation outside boring is difficult to determine, extremely limited by drilling the geologic hidden peril that can disclose.
Geophysical exploration about exhausted be physical difference according to geologic body and surrounding medium for example resistivity, polarizability, dielectric constant,
Elastic wave velocity etc., using special instrument, by natural field source or excite artificial field source to be observed.One piece of region can be obtained
Physical property characteristic, break through probing " a peephole view " limitation.So using the exploring drill hole on ground, carry out holing, ground thing
Visit, ratio can be obtained and drill more preferable Effect on Detecting.But carry out in the hole geophysical exploration about exhausted and there is also a lot of problems, though some methods
Right technical feasibility in theory, but during practice and inapplicable.Such as Guangzhou Underground is subject to boulder in process of construction
Impact is larger, has successively selected up to ten several geophysical prospecting method to carry out engineering geophysical method test and case study, result shows：
Transient electromagnetic, surface geology radar, Seismic Imaging Method all can not obtain good Effect on Detecting, but the density electricity in boring physical prospecting
Method CT and seismic CT have good Effect on Detecting, but investigative range is two dimensional cross-section, and three-dimensional detection technology is not yet ripe, mesh
The front observation system for across hole electrical method CT mostly is hole hole to wearing, and have ignored the letter between electrode in ground configuration electrode and hole
Number, thus lost the geological information between the ground of hole, simultaneously because its data acquisition modes gathers for serial combination, collecting efficiency
Low.
Utility model content
This utility model is to solve the deficiency of across hole detection mode presence at present it is proposed that a kind of be based on multiple borings
Three-dimensional parallel electrical method observation system with ground synchronous arrangement.
For achieving the above object, this utility model adopts the following technical scheme that：One kind is based on multiple borings and ground synchronous
The three-dimensional parallel electrical method observation system of arrangement, it includes ground electrodes group and the multiple Kong Zhong electricity s corresponding with multiple borings
Pole is gone here and there；Electrode array setting in hole：In each boring, an electrode array is set, electrode array is made up of the electrode of several constant spacings,
Its length is L, and electrode array is located at the spacing in respective bore bottom, and fixed electrode string between each electrode, electricity in fixing boring
Position in respective bore for the pole；Ground electrodes group is arranged：Grid electrode group arranges on the ground, each in grid electrode group
Spacing between electrode is respectively a and grid scope covers the planar range of boring that electrode in hole is located.
As the improvement further of such scheme, described three-dimensional parallel electrical method observation system also includes placing at infinity
Public electrode B, infinite point is defined as 3～5 times of survey line length in addition.
Further, what described three-dimensional parallel electrical method observation system also included placing at an arbitrary position public compares electrode N.
Preferably, public electrode B, public compare electrode N, in boring each electrode array, ground electrodes group pass through respectively parallel
Electrical prospecting apparatus is connected, and by the synchronous electrical method observation of porous and ground, finds out latent geologic anomaly.
As the improvement further of such scheme, in hole, electrode array sends into foot of hole by falling weight.
As the improvement further of such scheme, in hole, electrode array is by being bundled in feeding foot of hole in thin bar.
As the improvement further of such scheme, in electrode array, the spacing between each electrode is 0.2m～1m.
Further, in grid electrode group, the spacing between each electrode is 1m～5m.
As the improvement further of such scheme, bore diameter is 90mm, during spacing of wells 20m, electrode in each boring
The spacing between two neighboring electrode on string is 40cm, and every strip electrode string length is 6m.
Further, the spacing between the two neighboring electrode of ground grid electrode group is 4m, and scope covers these electricity
The planar range of boring that pole string is located.
The beneficial effects of the utility model are as follows：
1., due to the data acquisition modes that parallel electrical method is unique in this utility model, breach conventional high-density electrical prospecting apparatus list
When individual electrode or two electrode power supplies, the restriction that two electrodes receive, it is powered for single-point, and all electrodes all gather current potential letter
Breath, gathered data amount is huge, on-site data gathering efficiency high；
2., due to the extensibility of parallel electrical prospecting apparatus, this utility model can carry out three-dimensional across hole electrical method CT simultaneously and visit to porous
Survey, and combined ground latticed arrangement electrode, form the full stereo observing system in ground and hole, coverage is bigger, is obtained
Data volume is huge；
3. get parms many：The potential data of nature field, primary field, secondary field can be obtained in each power-up period, with
When can obtain the primary field potential response of different frequency by each power-up period power-on time length, obtain search coverage
Polarizability parameter, can carry out relevant parameter extraction and analysis in special item；
4. full three dimensions resistivity inversion, result is more directly perceived, also can be extracted in 3D data volume by software simultaneously
Section between any two boring.
Brief description
Fig. 1 is the horizontal layout schematic diagram of the three-dimensional parallel electrical method observation system of this utility model；
Fig. 2 is the perspective view of three-dimensional parallel electrical method observation system in Fig. 1；
Fig. 3 is emission electrode and receiving electrode relation schematic diagram in Fig. 2；
Fig. 4 is the in-situ measurement using a kind of three-dimensional parallel electrical method observation system of this utility model and geologic body method for surveying
Schematic diagram；
Fig. 5 is actual field detection of three dimensional solid result figure；
In figure：Electrode in 1- boring；2- ground electrodes；3- holes；4- current electrode.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
Seen based on the three-dimensional parallel electrical method of multiple borings and ground synchronous arrangement incorporated by reference to Fig. 1 and Fig. 2 is of the present utility model
Examining system includes electrode array, placement common electrical at infinity in ground electrodes group multiple holes corresponding with multiple borings
Pole B, place at an arbitrary position public and compare electrode N.Infinite point is defined as 3～5 times of survey line length in addition.
Electrode array setting in hole：In each boring 3, an electrode array is set, electrode array is by the electrode 1 of several constant spacings
Constitute, its length is L, and electrode array is located at respective bore 3 bottom, and the spacing between each electrode 1 in fixed electrode string, fixing brill
Position in respective bore 3 for the electrode 1 in hole 3.
Ground electrodes group is arranged：Grid electrode group arrange on the ground, in grid electrode group between each electrode 2 between
Away from respectively a and grid scope cover hole in electrode 1 be located boring 3 planar range.
Public electrode B, public compare electrode N, boring in each electrode array, ground electrodes group respectively by parallel electrical prospecting apparatus phase
Connect, by the synchronous electrical method observation of porous and ground, find out latent geologic anomaly.
Using the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement of the present utility model, in reality
Mainly include the following steps that when applying.
First, when construction geology reconnoitres hole, relevant treatment is carried out to the hole of reconnoitring having completed, utilized with maximum
Scene boring, saves and reconnoitres cost.
Certainly the work of this step can be omitted, and is directly entered second step.When construction geology reconnoitres hole, to complete
Hole is carried out plus non-metallic casing (as PVC sleeve pipe) is processed for reconnoitring of becoming, and sleeve pipe selects screen casing, if no in the case of screen casing, will cover
The outer spacing by 20cm of pipe arranges some row's apertures in order to substitute screen casing.
2nd, it is based on multiple borings and the three-dimensional parallel electrical method observation system of ground configuration.
Using the three-dimensional parallel electrical method observation system based on multiple borings and ground configuration：According to ground electrodes and Kong Zhong electricity
The mode that pole combines arranges three-dimensional parallel electrical method observation system, specific as follows.
(1) electrode arrangement in hole：An electrode array is arranged, electrode array is by the electrode 1 of several constant spacings in each boring 3
Constitute, its length is L, electrical method electrode array is sent into respective bore bottom, and ensures the spacing between each electrode 1 in electrode array,
Ensure position in respective bore 3 for the electrode 1 in boring 3；
(2) ground electrodes group arrangement：In ground configuration grid electrode group, in grid electrode group between each electrode 2
Spacing is respectively a and grid scope covers the planar range of boring 3 that electrode 1 in hole is located.
(3) public electrode B is placed at infinity, and the public electrode N that compares is placed at an arbitrary position；Public electrode
B, public compare electrode N, each electrode array, ground electrodes group are connected by parallel electrical prospecting apparatus respectively in boring, by porous and
The synchronous electrical method observation on ground, finds out latent geologic anomaly.
Key point of the present utility model：Electrod-array is arranged by ground and boring simultaneously, is formed complete in ground and hole
Stereo observing system, coverage is bigger, and data acquired amount is huge.Get parms many：Can be obtained from each power-up period
So field, primary field, the potential data of secondary field, can obtain a field potential of different frequency simultaneously by power-on time length
Response, obtains the polarizability parameter of search coverage, extractable use in special item.
Wherein, in electrode arrangement in hole, electrode array can be passed through falling weight or be bundled in thin bar, send into boring bottom
Portion.If drying is anhydrous in boring, need to pour water it is ensured that the contact of electrode in the borehole.In electrode array, the spacing between each electrode is
0.2m～1m；In grid electrode group, the spacing between each electrode is 1m～5m.
3rd, utilize supply current during each electrode power supply in the three-dimensional parallel electrical method observation system of parallel electrical prospecting apparatus collection and
The voltage data that other electrodes collect.
Described test system adopts AM method gathered data：When being powered as current electrode using one of electrode, other
All electrode simultaneous observation potential datas；I.e., as current electrode,, in power supply, other all electrodes are same for it for one of electrode
Step observation voltage data；Powered with two kinds of power-up period associating power supply modes, in each power-up period, comprise two different weeks
The pulse direct current of phase；Nature electric field data, primary field voltage data and secondary field electricity can be obtained in a power-up period
Pressure data, the electrical parameter such as extractable natural potential, resistivity, polarizability.
4th, complete entirely to detect the data acquisition of section.
If drilling depth H is larger, along bore detecting distance longer when, due to the restriction of single survey line length in boring, first
By electrode from boring bottommost arrangement, after completing an observation system data acquisition, on whole for the survey line in all borings
Carry certain distance S, but S<L is it is ensured that two surveys line have certain overlapping region, then has gathered after one group of number according still further in this step
Carry the electrode array in each boring, until completing entirely to detect the data acquisition of section.
5th, the data collecting solution editorial afterword is processed according to virtual electrode coordinate, extract inverting file and carry out inverting
Process, the final three-dimensional electrical data body obtaining in whole detection section.
6th, 3D data volume is carried out relevant treatment one-tenth figure, and combine actual geological condition, carry out related geologic interpretation.
Step 6 can also be omitted.Electrical method test system can adopt parallel electrical prospecting apparatus or high-density electric instrument.
Introduce this utility model in order to clearer, in the present embodiment, taking four boring as a example, four drilling depths are all
For 16m, bore diameter is 90mm, and spacing of wells 20m explains to this utility model.
First, when construction geology reconnoitres hole, the hole of reconnoitring having completed is carried out plus sleeve pipe process, sleeve pipe selects PVC to sieve
Pipe, the spacing pressing 20cm outside pvc pipe, if in the case of PVC-free screen casing, is arranged 5 row's apertures with electric hand drill by screen casing diameter 75mm
In order to substitute screen casing it is therefore an objective to ensure the connection of pvc pipe inner electric field and outer electric field.
2nd, arrange three-dimensional parallel electrical method observation system according to the mode that electrode in ground electrodes and hole combines, incorporated by reference to
Fig. 1 and Fig. 2, specially：
In hole, electrode 1 is arranged：Electrode array totally 16 electrodes 1 in each boring 3, electrode 1 spacing 40cm, then every strip electrode string
Length is 6m；Electrode array is passed through falling weight or is bundled in thin bar, send into boring 3 bottoms；
Ground electrodes 2 are arranged：In ground configuration grid electrode group, electrode 2 spacing 4m, scope covers brill that electrode 1 is located
The planar range in hole 3.
3rd, after observation system arranges, if anhydrous in boring 3, need to pour water into boring 3, to flooding topmost electrode 1
Connecting test system behind position, carries out parameter setting to test system.Incorporated by reference to Fig. 3 and Fig. 4, using AM method gathered data, use
Two kinds of power-up period associating power supply modes of 0.1s and 1s are powered, and comprise two differences in each power-up period of each electrode 1
The pulse direct current of cycle 0.1s and 1s.When being powered for current electrode 4 using one of electrode 1, the simultaneous observation of all electrodes 1
Potential data, obtains and surveys the electrical situation in area.
In step 3, it is specially each boring 3 16 electrode of arrangement, 36 electrodes of ground configuration.If in first boring 3
Electrode be respectively A1, A2 ... A16, second boring in electrode be respectively B1, B2 ... B16, the 3rd boring in electrode
Be respectively C1, C2 ... C16, the 4th boring in electrode be respectively D1, D2 ... D16, ground electrodes be 1,2 ... 36, shape
Become electrod-array.When carrying out AM measurement, the transmitting of electrode and reception are respectively：A1 powers, and A1～A16, B1～B16, C1～
C16, D1～D16,1～36 receives potential data simultaneously, and A2 powers, A1～A16, B1～B16, C1～C16, D1～D16,1～
36 receive potential data simultaneously, until A16 powers, A1～A16, B1～B16, C1～C16, D1～D16, and 1～36 receives simultaneously
Potential data；Analogize in this way, until each electrode in four borings is powered successively；When ground electrodes 1# are powered, 1～
36th, A1～A16, B1～B16, C1～C16, D1～D16 gathered data simultaneously, when 2# powers, 1～36, A1～A16, B1～
B16, C1～C16, D1～D16 gathered data simultaneously, until 36# electrode power supply, 1～36, A1～A16, B1～B16, C1～
C16, D1～D16 gathered data simultaneously.So far, complete the collecting work of all data of observation system.
4th, because every strip electrode string length is far smaller than 3 depth of holing, first electrode 1 is arranged from 3 bottommosts of holing,
After completing an observation system data acquisition, the survey line in all borings 3 is all above carried 5m, 1m overlapping with upper bar survey line, then
Gather one group of data；Again all electrodes 3 in boring are above carried 5m simultaneously after having gathered data, with last time observation system overlapping 1m again
Afterwards, gathered data, so far completes entirely to detect the data acquisition of section.
5th, the data collecting is processed according to virtual electrode coordinate, extract inverting file and carry out inversion procedure,
Obtain the 3D data volume in whole coverage of survey area eventually, in data body, include the parameters such as natural potential, resistivity, polarizability.
6th, 3D data volume is carried out relevant treatment one-tenth figure, and combines actual geological condition, carry out related geologic interpretation,
As in Fig. 4, shadow region is abnormal area.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this
Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in this utility model
Protection domain within.
Claims (10)
1. a kind of three-dimensional parallel electrical method observation systems based on multiple borings and ground synchronous arrangement, it include ground electrodes group,
And electrode array in multiple holes corresponding with multiple borings；It is characterized in that：Electrode array setting in hole：Arrange in each boring
One electrode array, electrode array is made up of the electrode of several constant spacings, and its length is L, and electrode array is located at respective bore bottom, and
Spacing between each electrode in fixed electrode string, position in respective bore for the electrode in fixing boring；Ground electrodes group is arranged：
Grid electrode group arranges on the ground, and in grid electrode group, the spacing between each electrode is respectively a and grid scope covers
The planar range of boring that electrode is located in hole.
2. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 1, it is special
Levy and be：Described three-dimensional parallel electrical method observation system also includes placing public electrode B at infinity, and infinite point is defined as
3～5 times of survey line length in addition.
3. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 2, it is special
Levy and be：What described three-dimensional parallel electrical method observation system also included placing at an arbitrary position public compares electrode N.
4. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 3, it is special
Levy and be：Public electrode B, public compare electrode N, boring in each electrode array, ground electrodes group respectively by parallel electrical prospecting apparatus phase
Connect, by the synchronous electrical method observation of porous and ground, find out latent geologic anomaly.
5. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 1, it is special
Levy and be：In hole, electrode array sends into foot of hole by falling weight.
6. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 1, it is special
Levy and be：In hole, electrode array is by being bundled in feeding foot of hole in thin bar.
7. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 1, it is special
Levy and be：In electrode array, the spacing between each electrode is 0.2m～1m.
8. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 1, it is special
Levy and be：In grid electrode group, the spacing between each electrode is 1m～5m.
9. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 1, it is special
Levy and be：Bore diameter is 90mm, during spacing of wells 20m, in each boring between the two neighboring electrode on electrode array between
Away from for 40cm, every strip electrode string length is 6m.
10. the three-dimensional parallel electrical method observation system based on multiple borings and ground synchronous arrangement as claimed in claim 9, it is special
Levy and be：Spacing between the two neighboring electrode of ground grid electrode group is 4m, and scope covers brill that these electrode arrays are located
The planar range in hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621012716.4U CN205958769U (en) | 2016-08-30 | 2016-08-30 | Three -dimensional parallel electric method observation system based on a plurality of drillings and ground are arranged in step |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621012716.4U CN205958769U (en) | 2016-08-30 | 2016-08-30 | Three -dimensional parallel electric method observation system based on a plurality of drillings and ground are arranged in step |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205958769U true CN205958769U (en) | 2017-02-15 |
Family
ID=57978962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621012716.4U Active CN205958769U (en) | 2016-08-30 | 2016-08-30 | Three -dimensional parallel electric method observation system based on a plurality of drillings and ground are arranged in step |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205958769U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143390A (en) * | 2018-09-14 | 2019-01-04 | 天津大学 | A kind of shallow transient electromagnetic fine granularing scalability method based on geometrical factor |
| CN110286412A (en) * | 2019-07-02 | 2019-09-27 | 自然资源部第二海洋研究所 | A kind of seabed natural potential observed pattern carrying the double towed bodys of transient electromagnetic and electrical interference bearing calibration |
| CN110609331A (en) * | 2019-09-24 | 2019-12-24 | 中国地质调查局西安地质调查中心 | Hidden deposition type manganese-rich ore identification method |
-
2016
- 2016-08-30 CN CN201621012716.4U patent/CN205958769U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143390A (en) * | 2018-09-14 | 2019-01-04 | 天津大学 | A kind of shallow transient electromagnetic fine granularing scalability method based on geometrical factor |
| CN110286412A (en) * | 2019-07-02 | 2019-09-27 | 自然资源部第二海洋研究所 | A kind of seabed natural potential observed pattern carrying the double towed bodys of transient electromagnetic and electrical interference bearing calibration |
| CN110609331A (en) * | 2019-09-24 | 2019-12-24 | 中国地质调查局西安地质调查中心 | Hidden deposition type manganese-rich ore identification method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106443794B (en) | A kind of three-dimensional electrical method observation system and geologic body method for surveying parallel | |
| CN102419455B (en) | Interwell parallel resistivity CT (computed tomography) testing method | |
| CN102879805B (en) | Borehole-based and ground combined seismic wave space exploration method | |
| CN205958769U (en) | Three -dimensional parallel electric method observation system based on a plurality of drillings and ground are arranged in step | |
| CN108226995B (en) | Active source microseismic monitoring device and method | |
| CN102866417A (en) | Device and method for seismic cross hole computed tomography (CT) detection and tomography of underground cave | |
| Maurer et al. | Seismic monitoring of the Rittershoffen EGS project (Alsace, France) | |
| CN202837558U (en) | Underground karst cave earthquake cross-hole CT (computer tomography) detection and tomographic imaging device | |
| CN103207412A (en) | Method for detecting solution leaching and groundwater pollution scope of acid in-situ leaching of uranium | |
| CN106802432B (en) | The method for surveying and device of soil layer construction | |
| CN106706715A (en) | Polluted soil detection method based on three-dimensional high-density electrical resistivity method | |
| CN104360402B (en) | Well-to-ground joint electrical-method testing method and system | |
| CN102720484B (en) | A kind of acoustic logging while drilling instrument and logging method | |
| CN106443189A (en) | Method and system for three-dimensional detection on earth electrode field and surrounding soil resistivity | |
| CN108760825A (en) | It is adapted to across the hole resistivity CT imaging methods of three-dimensional of the arbitrary cloth hole of urban environment | |
| Aning et al. | 2D electrical resistivity tomography (ERT) survey using the multi-electrode gradient array at the Bosumtwi impact crater, ghana | |
| CN106443795A (en) | Method for deducting and synthesizing AM data into ABM data by means of dual mode network parallel electrical method | |
| CN109343131B (en) | Lateral power supply ground well direct current method detection method and device | |
| Viero et al. | Investigations on the structural setting of a landslide-prone slope by means of three-dimensional electrical resistivity tomography | |
| EP2660630A1 (en) | Method and Apparatus for Electromagnetic Monitoring of Underground Formations | |
| CN114764151B (en) | Magnetotelluric frequency division chromatography inversion method | |
| CN111474592A (en) | Interwell electromagnetic detection system and method | |
| CN106483570A (en) | A kind of nagneto-telluric field geophysical prospecting method and device | |
| CN103630938A (en) | Imaging system and imaging method for well earthquake using hammer head of down-hole hammer as focus | |
| Dimovski et al. | A geophysical approach for mapping of abandoned mining workings and unconsolidated zones in coal mining areas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |