KR101082264B1 - A spectral induced polarization measurement system of samples - Google Patents

Abstract

PURPOSE: A system for measuring the wideband spectral induced polarization of a sample is provided to secure the reliability of a measured value and easily measure wideband spectral induced polarization using a sample holder for a rock sample and for a soil sample. CONSTITUTION: A transmitter(10) applies a constant current. A receiver(20) is connected to the transmitter and measures an amplitude and a phase difference according to a frequency domain. A sample holder(30) fixes a sample. A 4-electrode arranging unit successively arranges the current electrode, a potential electrode, and a sample in the sample holder and is connected to the transmitter and the receiver. A filtering sheet is inserted between the current electrode, the potential electrode, and the sample.

Description

A Spectral Induced Polarization measurement system of Samples

5H2O)으로 적신 필터지를 사용하여 측정값의 신뢰성을 보장할 수 있도록한 시료의 광대역 유도분극 측정 시스템에 관한 것이다.
The present invention relates to a wideband inductive polarization measurement system of a sample that enables easy and easy measurement of the broadband induced polarization characteristics of rocks and soils. By measuring the polarization effect easily and easily, it is possible to more accurately grasp the distribution characteristics of sulfide minerals such as iron, copper, nickel, lead, cobalt, silver, and zinc, ore quality and clay mineral content, and also the rock and In order to facilitate workability when measuring wideband inductive polarization of soil samples, sample holders for rock samples and soil samples are manufactured precisely, and copper sulfate solution (CuSO4) is used to reduce contact resistance between the sample and copper electrode.

5H2O) relates to a wideband inductive polarization measurement system of a sample, which is used to ensure the reliability of the measured value using a filter paper moistened with 5H2O).

A conventionally known induced polarization (IP) exploration system is a metal mineral traditionally used as a method of exploring the underground structure by measuring the induced polarization effect after inducing a polarization phenomenon by flowing an electric current underground. It is widely used for exploration.

FIG. 1 shows current and potential waveforms that can be found in conventional inductive polarization exploration, wherein FIG. 1A is a current waveform (I) and a potential waveform (V) when there is no filling material indicating induction polarization in the ground. When the current is injected into the potential, the potential between the two points changes without changing the current and time.

However, Figure 1b shows the current waveform (I) and potential waveform (V) when there is a chargeable material exhibiting induced polarization in the basement, the potential of the two points does not change at the same time as the current change, but the current injection After the start or after the current injection is stopped, the time is gradually increased or decreased gradually.

The polarization phenomenon is generally caused by an interface effect where local charge can be concentrated when current is applied, such as membrane polarization and electrode polarization. FIG. 2A In the state of ion normal distribution of, as shown in FIGS. 2B to 2C, film polarization and electrode polarization of positive and negative charges occur when current is applied.

In general, the distribution of cations and anions is shown in FIG. 2A. In particular, when the clay particles or the metal particles are contained, the membrane polarization phenomenon (see FIG. 2B) is very large. ) Or even in the absence of metal particles, an electrode polarization phenomenon (see FIG. 2C) also occurs by an electric double layer formed between the fluid and the mineral particles.

At this time, membrane polarization is a series of processes in which the current flow of electrolyte ions is disturbed by negatively charged clay minerals, and when the current is interrupted, ions are concentrated around the clay minerals. The voids are blocked by metal mineral particles inside, so that when the current is injected, positive ions are accumulated on one side of the particle and negative ions are accumulated on the other side. During injection, a current flows through the metal conduction in the metal mineral particles, and when the injection stops, ions are dissipated to their original positions, which occurs on the surface of the metal electrode in the electrolyte during electrolysis. Similarly, it is called electrode polarization, which is an overvoltage in physics. ge) is very similar to the effect.

The biggest problem in the conventional inductive polarization exploration is the electromagnetic coupling (Electromagnetic Coupling). This electromagnetic coupling refers to the coupling between circuits affected by the same electromagnetic field. Actual measurement data includes electromagnetic coupling as well as IP effects due to sulfide minerals.

In particular, in low boiling zones, the influence of electromagnetic coupling included in the IP method is a big problem, which makes it difficult to interpret underground mineralization zones from the exploration results or to accurately measure the IP effect of rock and soil samples indoors. .

5H2O)으로 적신 필터지를 사용하여 측정값의 신뢰성을 보장할 수 있는 시료의 광대역 유도분극 측정 시스템을 제공하는데 있다.
The present invention has been made in order to improve the above-described conventional problems, the object of which is to easily and easily measure the induced polarization effect of rock and soil samples indoors, iron, copper, nickel, lead, cobalt, silver, zinc The distribution characteristics of sulfide minerals such as and the quality of the ore or the content of clay minerals can be grasped more accurately, and also the rock samples and soil samples to facilitate the workability when measuring the broadband induction polarization of the rock and soil samples Copper sulfate solution (CuSO4) to precisely manufacture the sample holder and to reduce the contact resistance between the sample and the copper electrode

It is to provide a wideband inductive polarization measurement system of a sample that can guarantee the reliability of the measured value by using a filter paper soaked with 5H2O).

As a technical configuration for achieving the above object, the present invention, in the Spectral Induced Polarization (SIP) measurement system of rock and soil samples,

A transmitter for applying a constant current;

A receiver installed in connection with the transmitter to measure amplitude and phase data according to a frequency domain;

A sample holder for holding rock and soil samples;

A four-electrode array unit in which a current electrode C1, a potential electrode P1 and a sample, a potential electrode P2, and a current electrode C2 are sequentially arranged in the sample holder and connected to a transmitter and a receiver; And

It is to provide a broadband induction polarization measurement system of the sample, characterized in that it comprises a; filter paper is inserted and fixed to reduce the contact resistance between each of the current electrode and potential electrode and the sample.

In addition, the present invention is characterized in that the current electrode (C1) (C2) and the potential electrode (P1) (P2) is made of a copper plate, the filter paper is saturated with a copper sulfate solution so that polarization does not occur. .

In addition, the transmitter is characterized in that the current can be adjusted to 0.001 ~ 10 mA in a constant current circuit.

In addition, the present invention is characterized in that the receiver can measure the amplitude and phase by selecting a wide band up to a frequency of 0.125 to 1,024 Hz.

In addition, the present invention is characterized in that the sample holder is made of acryl and formed in a rectangular shape so that both sides of the sample are brought into close contact with the potential electrodes P1 and P2, respectively.

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As described above, according to the broadband inductive polarization measurement system of a sample according to the present invention, sulfide minerals such as iron, copper, nickel, lead, cobalt, silver, and zinc can be easily and easily measured by measuring the inductive polarization effect of various ore samples indoors easily and easily. It is possible to grasp the distribution characteristics of, and the higher the content of sulfide minerals in the ore, the greater the induced polarization effect, so an attempt can be made to evaluate the quality of the ore. In addition, the effect of induced polarization caused by contaminants such as clay minerals contained in soil or leachate from landfills can be measured, so that it can be used not only for depositing mineral deposits but also for environmental pollution site evaluation. In addition, when measuring wideband induction polarization of rock and soil samples, sample holders for rock samples and soil samples are easy to work with, and filter paper soaked with copper sulfate solution is used to reduce contact resistance between sample and copper plate electrode. Therefore, there is an excellent effect to ensure the reliability of the measured value.

While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

1 is a diagram of current and potential waveforms that can be observed in a conventional inductive polarization exploration.
1A is a diagram showing current and potential waveforms when there is no characteristic indicating inductive polarization on the ground;
Fig. 1B is a diagram showing current and potential waveforms when there is a characteristic of inducing polarization on the ground;
2 is a schematic diagram of polarization phenomenon by general membrane polarization and electrode polarization.
Figure 2a is a normal distribution state of ions.
Figure 2b is a state of membrane polarization due to clay in porous sandstone.
Figure 2c is an electrode polarization phenomenon is shown when a metal material is present in the rock.
3 is a schematic configuration diagram of a broadband inductive polarization measurement system of a sample according to the present invention.
4 is a cross-sectional structural view showing the internal structure of the sample holder for rock samples of the broadband inductive polarization measurement system of the present inventors sample.
FIG. 5 is a sectional view showing the main parts of a structure of a sample holder for a soil sample in a broadband inductive polarization measurement system of a sample according to the present invention; FIG.
6 is a graph showing the results of measuring broadband induction polarization by mixing pyrite with fine diameter glass beads using a broadband induction polarization measurement system of a sample of the present invention.
9 is a graph showing the results of broadband induction polarization measurement of pyrite-containing tuff rock samples using the broadband induction polarization measurement system of the inventors'sample;
<Description of the symbols for the main parts of the drawings>
10.Transmitter 11 ... Wire
20 ... Receiver 30 ... Sample holder for rock sample
31 Lid 40 ... Spindle
50 ... sample holder for soil samples 60 ... filter paper
C1, C2 ... Current electrode P1, P2 ... Potential electrode

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a schematic configuration diagram of a broadband inductive polarization measurement system for a sample according to the present invention, and FIG. 4 is a cross-sectional structural view showing the internal structure of a sample holder for rock samples in a broadband inductive polarization measurement system for a sample according to the present invention. Is a cross sectional structural view showing the internal structure of a sample holder for soil samples in a wideband inductive polarization measurement system of a sample according to the present invention, wherein the wideband inductive polarization measurement system of the present invention includes a transmitter 10 and a wire 11 for applying a constant current; The receiver 20 is connected to be installed to measure amplitude and phase data, and at this time, the sample holder 30 for the rock sample to which the rock sample S is press-fitted and fixed is provided at one side of the transmitter 10 and the receiver 20. The cap 31 is placed on the upper side thereof, and both sides of the rock sample S are installed to be press-fitted and fixed as the spindle 40 so that the two sides of the rock sample S can be fixed in close contact with each other. .

At this time, the sample holder is a sample holder 30 for the rock sample filled with a sample holder 30 for the rock sample and the soil sample (S ') as shown in Figure 5 to facilitate workability And a four-electrode array in which the current electrode C1, the potential electrode P1 and the sample S, and the potential electrode P2 and the current electrode C2 are arranged in this order. The filter 10 is connected to the transmitter 10 and the receiver 20 and the wire 11, and the filter paper 60 is interposed between the current electrodes C1, C2, the potential electrodes P1, P2, and the sample, respectively. Insertion is fixed.

5H2O)으로 포화(飽和)시켜 분극현상이 일어나지 않도록 하는 구성으로 이루어진다.
In addition, the sample holder 30 for rock samples and the sample holder 50 for soil samples are each made of acryl and have a rectangular shape, and the current electrodes C1, C2 and the potential electrodes P1, P2 are Copper plate, the filter paper copper sulfate solution (CuSO4

5H 2 O) to prevent polarization from occurring.

When explaining the embodiment of the present invention having such a configuration in detail as follows.

As shown in FIG. 3, a lab transmitter is used to apply a current of the transmitter 10 to measure the broadband induced polarization (SIP) of the sample. The receiver 20 connected to the wire 11 to measure amplitude and phase data was GDP-32, and the sample holder 30 for inserting and fixing a sample therein was made of acryl and formed into a rectangular shape. Then, the lid 31 is installed on the upper side so as to be opened and closed, and easily inserted in the case of a rock or ore sample, and both sides of the rock sample are fixed to one side of the transmitter 10 and the receiver 20 in close contact with the electrodes, respectively. It is press-fitted as the spindle 40 so that it may become possible.

In addition, when measuring broadband induction polarization of a sample fixed inside the sample holder 30, the arrangement of the current electrodes C1 (C2) and the potential electrodes P1 (P2) is performed by the four-electrode method. Electrodes P1-Samples-Potential electrodes P2-Current electrodes C2 are arranged in this order, wherein the current electrodes C1 (C2) and the potential electrodes P1 (P2) are made of copper plates, thereby smooth broadband induction polarization. Allow measurement to be made.

5H2O)으로 포화(飽和)시켜 분극현상이 일어나지 않도록 한다.Subsequently, a filter paper 60 is inserted between each of the current electrodes C1 (C2), the potential electrodes P1 (P2), and the sample, wherein the filter paper is a copper sulfate solution (CuSO4).

5H 2 O) to prevent polarization.

For wideband inductive polarization measurement of the sample in the sample holder 30, the frequency range of the receiver can be selected in a wide band from 0.125 to 1,024 Hz to measure amplitude and phase, and the frequency is 0.125, 0.25, 0.5, 1 Hz. Up to 1 cycle (stacking) and (stacking), and after that adjusts to automatically streaking by the selected frequency, the transmitter 10 to adjust the current to 0.001 ~ 10mA by a constant current circuit.

5H2O)으로 포화시켜 광대역 유도분극을 측정한다. On the other hand, Figure 6 is a graph showing a result of measuring broadband induction polarization by mixing pyrite with fine diameter glass beads (Glass bead) using a broadband induction polarization measurement system of the present inventors, the glass beads of the fine diameter (Glass Method for measuring broadband induction polarization using bead), first put 250g of fine diameter glass beads (Glass beads) to play the role of soil instead of soil in the sample holder 50 for soil samples, 0.01M Diluted copper sulfate solution (CuSO4

Saturate with 5H2O) and measure the broadband induction polarization.

In this case, the frequency used is 0.125-1,024 Hz, and the weight ratio of pyrite is increased in eight steps of 0.25%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, and the broadband inductive polarization is performed at each frequency. By measurement, the change in amplitude and phase difference according to the pyrite weight ratio was observed.

As can be seen in the graph of FIG. 6, as the weight ratio of pyrite increases, the amplitude tends to decrease slightly at high frequencies, and the phase difference tends to increase in the 200 Hz band.

On the other hand, Figure 7 is a graph showing the results of measuring broadband induction polarization in the rock sample sample holder 30 using a rock sample drilled in the Sunshin mine (the only gold mine) located in Haenam-gun, Jeollanam-do, Korea As a result of the measurement, it is not possible to observe a change in amplitude and phase difference according to the measurement frequency, whereas in the case of tuff sample containing pyrite, fine pyrite mixed with pyrite in FIG. As with the measurement results of glass beads of diameter, the amplitude tends to decrease slightly at high frequencies, and the phase difference tends to increase in the 10 Hz band.

The distribution characteristics of pyrite, a sulfide mineral, can be grasped from the measurement results of the glass diameters of glass diameters and rock samples of the above-mentioned fine diameters, and the weight ratio of pyrite can be easily estimated from the magnitude of phase difference according to frequency. It is.

Claims (7)

In the Spectral Induced Polarization (SIP) Measurement System of Samples,
A transmitter for applying a constant current;
A receiver installed in connection with the transmitter and measuring an amplitude and a phase difference according to a frequency domain;
A sample holder for holding a sample;
A four-electrode array unit in which a current electrode C1, a potential electrode P1 and a sample, a potential electrode P2, and a current electrode C2 are sequentially arranged in the sample holder and connected to a transmitter and a receiver; And
Broadband inductive polarization measurement system of a sample, characterized in that it comprises a; filter paper is inserted and fixed between each of the current electrode and the potential electrode and the sample.
2. The wideband inductive polarization measurement system of claim 1, wherein the current electrodes (C1) (C2) and the potential electrodes (P1) (P2) are made of copper plates.
The method of claim 1, wherein the filter paper copper sulfate solution (CuSO4

5H 2 O) Saturation (5H 2 O) so that the polarization phenomenon does not occur, the broadband inductive polarization measurement system of the sample.
The wideband inductive polarization measurement system of claim 1, wherein the transmitter is capable of adjusting a current from 0.001 to 10 mA in a constant current circuit.
The wideband inductive polarization measurement system according to claim 1, wherein the receiver can measure the amplitude and the phase difference by selecting a wide band up to a frequency of 0.125 to 1,024 Hz.
The wideband inductive polarization measurement system of claim 1, wherein the sample holder is made of acryl and is formed in a rectangular shape so that both sides of the sample are in close contact with and fixed to the potential electrodes (P1) and (P2), respectively. delete

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