CN117724175A - Three-dimensional excitation data acquisition and analysis method and system - Google Patents
Three-dimensional excitation data acquisition and analysis method and system Download PDFInfo
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- CN117724175A CN117724175A CN202311738953.3A CN202311738953A CN117724175A CN 117724175 A CN117724175 A CN 117724175A CN 202311738953 A CN202311738953 A CN 202311738953A CN 117724175 A CN117724175 A CN 117724175A
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- 238000004458 analytical method Methods 0.000 title claims abstract description 52
- 230000005284 excitation Effects 0.000 title claims abstract description 45
- 230000002159 abnormal effect Effects 0.000 claims abstract description 14
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000010287 polarization Effects 0.000 claims description 46
- 230000000007 visual effect Effects 0.000 claims description 13
- 238000007781 pre-processing Methods 0.000 claims description 6
- 238000013079 data visualisation Methods 0.000 claims 2
- 238000013480 data collection Methods 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 15
- 239000011707 mineral Substances 0.000 abstract description 15
- 238000011835 investigation Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
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- G—PHYSICS
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Abstract
The invention discloses a three-dimensional excitation data acquisition and analysis method and a system, which are applied to the technical field of mineral exploration. The method comprises the following steps: arranging a transmitting electrode and a receiving electrode to form a receiving-transmitting device of any bipolar source; collecting three-dimensional excitation data of an observation point; calculating the polarizability data of the observation point based on the three-dimensional excitation data; converting the polarizability data of the observation point into a polarizability profile; and processing and analyzing the abnormal data in the polarizability profile by a wavelet analysis method. According to the invention, through carrying out wavelet decomposition on the abnormal data in the polarizability profile, the noise and the mineral information in the abnormal data are distinguished, accurate excitation data are obtained, and then the mineral distribution is analyzed, so that the analysis result is more accurate.
Description
Technical Field
The invention relates to the technical field of mineral exploration, in particular to a three-dimensional excitation data acquisition and analysis method and system.
Background
The induced polarization method is a group of electrical exploration methods for finding metals and solving the problems of hydrogeology, engineering geology and the like according to the induced polarization effect of rocks and ores. The polarizability of an ore is primarily determined by the volume percent of electronically conductive minerals contained therein and their structure. In general, the larger the content, the finer the conductive mineral particles, and the denser the mineralized rock (ore) Dan Yue, the greater the polarizability. The rock completely free of electronically conductive minerals has very small polarizability, so that the polarizability can be calculated through three-dimensional excitation data to further judge the ore distribution condition in the investigation region. However, in the actual investigation process, due to the fact that the composition and the position of the underground minerals are complex, a plurality of minerals are overlapped together to cause abnormality of the excitation data, so that analysis of the minerals is difficult to perform to cause errors of analysis results. Under the condition that the excitation data have errors, the mineral investigation effect cannot be realized. Therefore, how to provide a three-dimensional laser data acquisition and analysis method and system is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a three-dimensional excitation data acquisition and analysis method and system, which are used for separating overlapped data in abnormal data by carrying out wavelet decomposition on the abnormal data in a polarization profile so as to obtain accurate excitation data and further analyze mineral distribution.
In order to achieve the above object, the present invention provides the following technical solutions:
a three-dimensional excitation data acquisition and analysis method comprises the following steps:
s1, arranging a transmitting electrode and a receiving electrode to form a receiving-transmitting device of any bipolar source;
s2, collecting three-dimensional excitation data of an observation point;
s3, calculating the polarizability data of the observation point based on the three-dimensional excitation data;
s4, converting the polarizability data of the observation points into a polarizability profile and performing preliminary analysis;
s5, processing and analyzing abnormal data in the polarizability profile by a wavelet analysis method.
Optionally, the arranging the transmitting electrode and the receiving electrode in S1 is specifically: and a plurality of transmitting electrodes are uniformly arranged in the middle position of the observation area along the direction of the parallel measuring lines, a plurality of measuring lines are arranged in the observation area, a plurality of observation points are uniformly arranged on each measuring line, the observation area is divided into a plurality of receiving areas evenly, and a plurality of receiving electrodes are arranged in each receiving area.
Optionally, the potential difference of the electrodes in each observation point after the start of power supply, which varies with time, and the potential difference after power failure are collected in S2.
Optionally, S3 is specifically: calculating the visual polarization rate based on the electrode stable potential difference and the induced polarization potential difference at the moment of power failure after power supply, and taking the visual polarization rate as polarization rate data;
wherein eta is s For visual polarization, deltaU is the stable potential difference of the electrodes within a certain time after power supply, deltaU 2 The polarization potential difference is induced at the instant of power failure.
Optionally, S4 is specifically: three-dimensional coordinate data and polarization ratio data of the transmitting electrode and the receiving electrode are converted into a polarization ratio profile by drawing software, and ore distribution of an observation area is analyzed based on the polarization ratio data distribution of the polarization ratio profile.
Optionally, S5 is specifically:
s51, carrying out wavelet decomposition on the data of the polarization rate corresponding to the abnormal part to obtain first-order detail data and first-order proximity data;
s52, carrying out ore finding analysis on the first-order detail data;
s53, carrying out wavelet decomposition on the first-order proximity data to obtain second-order detail data and second-order proximity data;
s54, carrying out ore finding analysis on the second-order detail data and the second-order proximity data.
The three-dimensional excitation data acquisition and analysis system comprises an excitation data acquisition device, a data preprocessing module, a data visual analysis module and a data anomaly analysis module which are sequentially connected, wherein the excitation data acquisition device is used for acquiring three-dimensional excitation data of an observation point, the data preprocessing module is used for calculating the polarization rate data of the observation point, the data visual analysis module is used for converting the polarization rate data of the observation point into a polarization rate profile, and the data anomaly analysis module is used for processing and analyzing the anomaly data in the polarization rate profile.
Compared with the prior art, the invention discloses a three-dimensional excitation data acquisition and analysis method and system, which have the following beneficial effects: according to the invention, through carrying out wavelet decomposition on the abnormal data in the polarizability profile, the noise and the mineral information in the abnormal data are distinguished, accurate excitation data are obtained, and then the mineral distribution is analyzed, so that the analysis result is more accurate; the invention adopts any bipolar source transceiver, adopts a mode of multi-acquisition channel number, small cell grid and multi-point excitation, and can obtain reliable data with high accuracy in a low-resistance thick coverage area.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a three-dimensional excitation data acquisition and analysis method of the invention;
fig. 2 is a schematic diagram of a three-dimensional excitation data acquisition and analysis system according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a three-dimensional excitation data acquisition and analysis method, which is shown in fig. 1 and comprises the following steps:
s1, arranging a transmitting electrode and a receiving electrode to form a receiving-transmitting device of any bipolar source;
s2, collecting three-dimensional excitation data of an observation point;
s3, calculating the polarizability data of the observation point based on the three-dimensional excitation data;
s4, converting the polarizability data of the observation points into a polarizability profile and performing preliminary analysis;
s5, processing and analyzing abnormal data in the polarizability profile by a wavelet analysis method.
Further, the arrangement of the transmitting electrode and the receiving electrode in S1 is specifically: and a plurality of transmitting electrodes are uniformly arranged in the middle position of the observation area along the direction of the parallel measuring lines, a plurality of measuring lines are arranged in the observation area, a plurality of observation points are uniformly arranged on each measuring line, the observation area is divided into a plurality of receiving areas evenly, and a plurality of receiving electrodes are arranged in each receiving area.
Further, in the embodiment of the present invention, 14 transmitting electrodes are arranged in total, the distance between each transmitting electrode is 200m, 20 measuring lines are arranged in total, 34 observation points are arranged on each measuring line, the investigation region is divided into 16 small receiving regions, and 45 receiving devices are arranged in one receiving region.
Further, in S2, the time-varying potential difference of the electrodes in each observation point from the start of power supply and the potential difference after power failure are collected.
Further, S3 is specifically: calculating the visual polarization rate based on the electrode stable potential difference and the induced polarization potential difference at the moment of power failure after power supply, and taking the visual polarization rate as polarization rate data;
wherein eta is s For visual polarization, deltaU is the stable potential difference of the electrodes within a certain time after power supply, deltaU 2 The polarization potential difference is induced at the instant of power failure.
Further, S4 is specifically: three-dimensional coordinate data and polarization ratio data of the transmitting electrode and the receiving electrode are converted into a polarization ratio profile by drawing software, and ore distribution of an observation area is analyzed based on the polarization ratio data distribution of the polarization ratio profile.
Furthermore, in the embodiment of the invention, the preliminary prospecting analysis can be completed according to the numerical distribution of the polarizability profile and the polarizability data corresponding to different minerals and soil properties.
Further, S5 is specifically:
s51, carrying out wavelet decomposition on the polarizability data corresponding to the abnormal part to obtain first-order detail data and first-order proximity data;
s52, carrying out ore finding analysis on the first-order detail data;
s53, carrying out wavelet decomposition on the first-order proximity data to obtain second-order detail data and second-order proximity data;
s54, carrying out ore finding analysis on the second-order detail data and the second-order proximity data.
Further, in the embodiment of the present invention, after the wavelet decomposition is performed on the polarizability data in S51, the abnormal data is removed from the first-order detail data, the analysis result is obtained after the analysis is performed on the first-order detail data, the first-order detail data is common noise data, then the wavelet decomposition is performed on the first-order proximity data, the obtained second-order detail data and the second-order proximity data are separated, and the accurate prospecting result is obtained by performing the prospecting analysis on the second-order detail data and the second-order proximity data respectively.
Corresponding to the method shown in fig. 1, the embodiment of the invention also discloses a three-dimensional excitation data acquisition and analysis system, which is applied to the three-dimensional excitation data acquisition and analysis method described in any one of the above, and as shown in fig. 2, the three-dimensional excitation data acquisition and analysis system comprises an excitation data acquisition device, a data preprocessing module, a data visual analysis module and a data anomaly analysis module which are sequentially connected, wherein the excitation data acquisition device is used for acquiring three-dimensional excitation data of an observation point, the data preprocessing module is used for calculating the polarization rate data of the observation point, the data visual analysis module is used for converting the polarization rate data of the observation point into a polarization rate profile, and the data anomaly analysis module is used for processing and analyzing the anomaly data in the polarization rate profile.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The three-dimensional excitation data acquisition and analysis method is characterized by comprising the following steps of:
s1, arranging a transmitting electrode and a receiving electrode to form a receiving-transmitting device of any bipolar source;
s2, collecting three-dimensional excitation data of an observation point;
s3, calculating the polarizability data of the observation point based on the three-dimensional excitation data;
s4, converting the polarizability data of the observation points into a polarizability profile and performing preliminary analysis;
s5, processing and analyzing abnormal data in the polarizability profile by a wavelet analysis method.
2. The three-dimensional excitation data acquisition and analysis method according to claim 1, wherein the arrangement of the transmitting electrode and the receiving electrode in S1 is specifically as follows: and a plurality of transmitting electrodes are uniformly arranged in the middle position of the observation area along the direction of the parallel measuring lines, a plurality of measuring lines are arranged in the observation area, a plurality of observation points are uniformly arranged on each measuring line, the observation area is divided into a plurality of receiving areas evenly, and a plurality of receiving electrodes are arranged in each receiving area.
3. The three-dimensional excitation data collection and analysis method according to claim 1, wherein the potential difference of the electrodes in each observation point with time after the start of power supply and the potential difference after power failure are collected in S2.
4. The method for collecting and analyzing three-dimensional excitation data according to claim 1, wherein S3 specifically comprises: calculating the visual polarization rate based on the electrode stable potential difference and the induced polarization potential difference at the moment of power failure after power supply, and taking the visual polarization rate as polarization rate data;
wherein eta is s For visual polarization, deltaU is the stable potential difference of the electrodes within a certain time after power supply, deltaU 2 The polarization potential difference is induced at the instant of power failure.
5. The method for collecting and analyzing three-dimensional excitation data according to claim 1, wherein S4 specifically comprises: three-dimensional coordinate data and polarization ratio data of the transmitting electrode and the receiving electrode are converted into a polarization ratio profile by drawing software, and ore distribution of an observation area is analyzed based on the polarization ratio data distribution of the polarization ratio profile.
6. The method for collecting and analyzing three-dimensional excitation data according to claim 1, wherein S5 specifically comprises:
s51, carrying out wavelet decomposition on the polarizability data corresponding to the abnormal part to obtain first-order detail data and first-order proximity data;
s52, carrying out ore finding analysis on the first-order detail data;
s53, carrying out wavelet decomposition on the first-order proximity data to obtain second-order detail data and second-order proximity data;
s54, carrying out ore finding analysis on the second-order detail data and the second-order proximity data.
7. The three-dimensional excitation data acquisition and analysis system is characterized by comprising an excitation data acquisition device, a data preprocessing module, a data visualization analysis module and a data exception analysis module which are sequentially connected, wherein the excitation data acquisition device is used for acquiring three-dimensional excitation data of an observation point, the data preprocessing module is used for calculating polarization rate data of the observation point, the data visualization analysis module is used for converting the polarization rate data of the observation point into a polarization rate profile, and the data exception analysis module is used for processing and analyzing the exception data in the polarization rate profile.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311738953.3A CN117724175A (en) | 2023-12-15 | 2023-12-15 | Three-dimensional excitation data acquisition and analysis method and system |
| LU506094A LU506094B1 (en) | 2023-12-15 | 2024-01-12 | Three-dimensional induced polarization data acquisition and analysis method and system |
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| CN202311738953.3A CN117724175A (en) | 2023-12-15 | 2023-12-15 | Three-dimensional excitation data acquisition and analysis method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109375272A (en) * | 2018-11-09 | 2019-02-22 | 安徽省勘查技术院 | A kind of new working method and technology in the three-dimensional sharp electricity of low-resistance heavy-cover area progress |
| CN112083500A (en) * | 2019-07-11 | 2020-12-15 | 安徽省勘查技术院(安徽省地质矿产勘查局能源勘查中心) | Method and system for identifying steep-inclined vein-shaped gold ores under thick covering layer |
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| CN109375272A (en) * | 2018-11-09 | 2019-02-22 | 安徽省勘查技术院 | A kind of new working method and technology in the three-dimensional sharp electricity of low-resistance heavy-cover area progress |
| CN112083500A (en) * | 2019-07-11 | 2020-12-15 | 安徽省勘查技术院(安徽省地质矿产勘查局能源勘查中心) | Method and system for identifying steep-inclined vein-shaped gold ores under thick covering layer |
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