CN103913634A - Rock-ore specimen true electrical parameter testing method and device - Google Patents

Abstract

The invention relates to the technical field of rock-ore measurement, in particular to a rock-ore specimen true electrical parameter testing method and device. According to the method, testing electrode boxes at the two ends of a rock-ore specimen are clamped through the testing device to conduct the connection test, and then the background polarizability eta b and the background resistivity rho b of the testing device are obtained; the rock-ore specimen to be tested is tested, and then the apparent polarizability eta s and the apparent resistivity rho s of the rock-ore specimen to be tested are obtained; the true polarizability eta 0 and the true resistivity rho 0 of the rock-ore specimen to be tested are calculated through a specific formula according to the testing parameters obtained. By the adoption of the rock-ore specimen true electrical parameter testing method and device, rock-ore electrical parameter testing accuracy can be improved greatly, and basic electrical property information is provided for electrical (magnetic) metal ore exploration.

Description

A kind of true electric parameters testing method of rock and ore sample and device

Technical field

The present invention relates to rock and ore field of measuring technique, is a kind of true electric parameters testing method of rock and ore sample and device concretely.

Background technology

The electrical quantity of test rock and ore sample.Understanding the electrical difference of ore body and country rock, is the physical property prerequisite that determines that can electricity (magnetic) method effectively look for ore deposit.Also be just to drill the objective basis of calculating with inversion interpretation.Concerning Geophysical Prospecting, there is basic significance.

Existing domestic and international rock and ore sample electronic parameter test system is of a great variety, domestic, and " swashing electric standard " recommends to seal with wax method, physical property frame, dough method etc., has Russia (B И TP), beautiful (Zonge) abroad, adds the product of states such as (GDD).

The test of rock and ore sample electrical quantity is all generally to imitate field to look for ore deposit proving installation and method.Test macro is made up of test specimen frame, miniwatt transmitter and receiver (or use and look for ore deposit receiver) etc.The Canada's GDD SCIP of company test macro has adopted two utmost point devices (existing document points out that its test philosophy is wrong).

The electrical quantity of test rock and ore sample, should be the true electrical quantity of sample, but existing domestic and international rock and ore sample electronic parameter test system, and the electrical quantity of surveying is not true electrical quantity, but a kind of mistake very large look electrical quantity.

The reason that makes the mistake is that the test condition of sample and technical requirement, all lack the standardization of original position, and test macro exists the interference of background electrical quantity.Mainly contain:

1. in order to improve measuring accuracy, conventionally in test, add high current density, rock and ore stands while reconnoitring current density that this current density substantially exceeds electricity (magnetic) method, is disturbed by current non-linear for the good ore of leading, making institute's this electrical quantity of mark is not original position electrical quantity.

2. in sample electric parameters testing, power supply source all adopts voltage source, causes surveyed electrical quantity disturbed by the polarization of galvanic electrode.The parameter of surveying is not the real parameter of sample.

3. the receiver used of test specimen, possesses the technical requirement of high precision and high input impedance when different, cause low-resistance sample potential test precision inadequate, and high resistant sample shunting MN loop causes non-polarizing electrode to produce polarization, and the electrical quantity of surveying is subject to dual interference.

4. in test, fail to eliminate the background electrical quantity that test macro exists and disturb, cause surveyed good electrical quantity of leading ore, have the difference of the order of magnitude with its true value.Much look in the data of ore deposit and also surveyed wrong parameter is used as to true electrical quantity in application.

Causing the reason of electric parameters testing mistake, is mainly that test condition and the technical requirement understanding to electrical quantity is not enough.Lack the research to the true electrical quantity of test rock ore deposit sample.Another major reason is in " induced polarization method technical stipulation ", measuring accuracy to be required to repeat relative error to weigh.Relative error reflection be the accidental error in test, and precision refers to test value and the approaching degree of true value, trueness error not only reflects accidental error, reflects systematic error simultaneously.In rock and ore sample electric parameters testing, two kinds of errors all exist.If but only note repeating relative error, ignore systematic error, lead electrical quantity that massive ore is surveyed and will occur gross mistake for good.

Summary of the invention

The object of the invention is to correctly test the true electrical quantity of rock and ore sample, standard of the present invention test condition and technical requirement, and the background electrical quantity of eliminating the test macro existence of being found by the present invention in test disturbs, the embodiment of the present invention provides the method for testing of the true electrical quantity of a kind of rock and ore sample accordingly, comprise

Normative testing condition and technical requirement, and every rock and ore sample to be measured must, through twice test result, calculate the true electrical quantity of every rock and ore sample through invention formula.Test is for the first time the rock and ore sample to be measured of test, obtains the apparent chargeability η of described rock and ore sample to be measured _sapparent resistivity ρ with described rock and ore sample to be measured _s, and supply current pulse width T moment potential value Δ U _mN(T), the distance L between described test potential electrode _mN;

Test is for the second time that the background electrical quantity that test macro exists disturbs, and takes off and has tested the rock and ore sample of looking electrical quantity, by two testing cassete interoperability tests, draws the background polarizability η of this system and device _bwith background electricalresistivityρ _b, and the test background potential value Δ U in supply current pulse width T moment _b(T) distance L described in, when interoperability test between potential electrode _b;

According to the parameter that records obtained above, the formula by invention:

${\mathrm{\η}}_0={\mathrm{\η}}_s+\left({\mathrm{\η}}_s{-\mathrm{\η}}_b\right)*\frac{\mathrm{\Δ}{U}_b\left(T\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_b\left(T\right)},$

${\mathrm{\ρ}}_0={\mathrm{\ρ}}_s+({\mathrm{\ρ}}_s-{\mathrm{\ρ}}_b)*\frac{L_b}{L_{\mathrm{MN}}-L_b},$

Calculate the true pole rate η of described rock and ore sample to be measured ₀with true resistivity ρ ₀.

According to a further aspect of a kind of true electric parameters testing method of rock and ore sample described in the embodiment of the present invention, adopt constant current source to power.

According to another further aspect of a kind of true electric parameters testing method of rock and ore sample described in the embodiment of the present invention, the receiver that receives described test parameter has uV level measuring accuracy and 10 ⁹input impedance more than Ω.

According to another further aspect of a kind of true electric parameters testing method of rock and ore sample described in the embodiment of the present invention, described proving installation is 4 utmost point collating units, is respectively the potential electrode of 2 non-polarizing electrodes and the galvanic electrode of 2 non-polarizing electrodes.

According to another further aspect of a kind of true electric parameters testing method of rock and ore sample described in the embodiment of the present invention, the galvanic electrode of the test electrode of described 2 non-polarizing electrodes and 2 non-polarizing electrodes is all in the non-polarizing electrode box in two identical copper one copper-baths, or in the non-polarizing electrode of lead-lead chloride, be placed in respectively rock and ore sample two ends.

The embodiment of the present invention also provides a kind of rock and ore sample true Testing device of electrical parameter, comprises,

Depending on electrical quantity acquiring unit, background electrical quantity acquiring unit, true electrical quantity computing unit;

The described electrical quantity acquiring unit of looking, according to the result of test rock and ore sample to be measured, obtains the apparent chargeability η of described rock and ore sample to be measured _sapparent resistivity ρ with described rock and ore sample to be measured _s, and the test potential value Δ U in supply current pulse width T moment _mN(T), the distance L between described test electrode _mN;

Described background electrical quantity acquiring unit, be take off survey the rock and ore sample of looking electrical quantity after for to two electrode box interoperability tests, obtain the background polarizability η of proving installation _bwith background electricalresistivityρ _b, and the background potential value Δ U of the potential electrode in supply current pulse width T moment _b(T) distance L of potential electrode two interpolars described in, when interoperability test _b;

Described true electrical quantity computing unit, for according to test parameter obtained above, by invention formula:

${\mathrm{\η}}_0={\mathrm{\η}}_s+\left({\mathrm{\η}}_s{-\mathrm{\η}}_b\right)*\frac{\mathrm{\Δ}{U}_b\left(T\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_b\left(T\right)},$

${\mathrm{\ρ}}_0={\mathrm{\ρ}}_s+({\mathrm{\ρ}}_s-{\mathrm{\ρ}}_b)*\frac{L_b}{L_{\mathrm{MN}}-L_b},$

Calculate the true pole rate η of described rock and ore sample to be measured ₀with true resistivity ρ ₀.

According to a further aspect of the true Testing device of electrical parameter of a kind of rock and ore sample described in the embodiment of the present invention, adopt constant current source to power.

According to another further aspect of the true Testing device of electrical parameter of a kind of rock and ore sample described in the embodiment of the present invention, the receiver that receives described test parameter has uV level measuring accuracy and 10 ⁹input impedance more than Ω.

By the method and apparatus of above-described embodiment, can increase substantially rock and ore electric parameters testing precision, look for ore deposit to provide real basis electrical information to electricity (magnetic) method metallic ore.

Accompanying drawing explanation

Read in conjunction with the following drawings the detailed description to embodiment, above-mentioned feature and advantage of the present invention, and extra feature and advantage, will be more readily apparent from.

Figure 1 shows that the process flow diagram of the true electric parameters testing method of a kind of rock and ore sample of the embodiment of the present invention;

Figure 2 shows that the structural representation of the true Testing device of electrical parameter of a kind of rock and ore sample of the embodiment of the present invention;

Figure 3 shows that a kind of proving installation structural representation of the embodiment of the present invention;

Figure 4 shows that the particular flow sheet of the true electric parameters testing method of a kind of rock and ore sample of the embodiment of the present invention.

Embodiment

Description below can make any those skilled in the art utilize the present invention.The descriptor providing in specific embodiment and application is only example.The various extensions of embodiment as described herein and combination are apparent for those skilled in the art, and in the situation that not departing from the spirit and scope of the invention, the rule of the present invention's definition can be applied in other embodiment and application.Therefore, the embodiment shown in the present invention is not only limited to, the maximum magnitude consistent with principle shown in this paper and feature contained in the present invention.

Be illustrated in figure 1 the process flow diagram of the true electric parameters testing method of a kind of rock and ore sample of the embodiment of the present invention.

Comprise step 101, by the test electrode box interoperability test at clamping rock and ore sample two ends, draw the background polarizability η of this device _bwith background electricalresistivityρ _b, and the background potential value Δ U of the test electrode in supply current pulse width T moment _b(T) distance L of test electrode two interpolars described in, when interoperability test _b.

Step 102, tests rock and ore sample to be measured, obtains the apparent chargeability η of described rock and ore sample to be measured _sapparent resistivity ρ with described rock and ore sample to be measured _s, and the test potential value Δ U of the test electrode in supply current pulse width T moment _mN(T), the distance L between described test electrode _mN.

The execution sequence of above-mentioned steps 101 and 102 in no particular order, just for example, not should be understood to limiting the scope of the present invention in this example.

Step 103, according to detected parameters obtained above, passes through test parameter

${\mathrm{\η}}_0={\mathrm{\η}}_s+\left({\mathrm{\η}}_s{-\mathrm{\η}}_b\right)*\frac{\mathrm{\Δ}{U}_b\left(T\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_b\left(T\right)},$

${\mathrm{\ρ}}_0={\mathrm{\ρ}}_s+({\mathrm{\ρ}}_s-{\mathrm{\ρ}}_b)*\frac{L_b}{L_{\mathrm{MN}}-L_b},$

Calculate the true pole rate η of described rock and ore sample to be measured ₀with true resistivity ρ ₀.

As one embodiment of the present of invention, in described step 102, the measuring current density j that described rock and ore sample to be measured passes through ₀≤ 1-3uA/cm ².

As one embodiment of the present of invention, in described step 102, described rock and ore sample to be measured was soaked to underground water after 24 hours, then take out after drying and detect.

As one embodiment of the present of invention, described rock and ore sample Testing device of electrical parameter has 4 electrodes, is respectively the potential electrode of 2 non-polarizing electrodes and the galvanic electrode of 2 non-polarizing electrodes.

As one embodiment of the present of invention, adopt constant current source to power.

Receive described receiver and there are uV level measuring accuracy and 10 ⁹input impedance more than Ω.The test parameter that described receiver collects test electrode sends background electrical quantity acquiring unit to and looks electrical quantity acquiring unit, and receiver meets the measuring accuracy of 0.1～1uV, has guaranteed low-resistance (10 ^-3Ω M) test of specimen of ore electrical quantity, 10 ⁹Ω input impedance has guaranteed high resistant (10 ⁶Ω M) do not shunt MN loop in rock test.Domestic and international existing receiver input impedance is 10M Ω, as sample electricalresistivityρ ₀=10 ⁵when Ω M, its resistance can be up to R ₀=4*10 ⁶Ω, like this, the resistivity of 10M Ω receiver test will reduce 30%.Meanwhile, because shunting causes the polarization of MN non-polarizing electrode, produce dual interference.

As one embodiment of the present of invention, described 2 potential electrode MN and 2 galvanic electrode AB adopt (AMNB) arrangement mode, AM and BN are placed in respectively in the polarized electrode box of two copper-copper-baths, and power supply and potential test are implemented in the two ends that are placed in rock and ore sample to be measured.

As one embodiment of the present of invention, between described test electrode and described tested rock and ore sample, also there is moisture pad, the area of moisture pad equates with the cross-sectional area of described rock and ore sample, can eliminate MN electrode (metal) and directly contact sample, the interference of the unsettled electrode potential extreme difference bringing.

By the method for above-described embodiment, can increase substantially rock and ore electric parameters testing precision, look for ore deposit that the correct electrical information in basis is provided to electricity (magnetic) method metallic ore.

Be illustrated in figure 2 the structural representation of the true Testing device of electrical parameter of a kind of rock and ore sample of the embodiment of the present invention.

Comprise, background electrical quantity acquiring unit 201, depending on electrical quantity acquiring unit 202, true electrical quantity computing unit 203.

Described background electrical quantity acquiring unit 201, for by the electrode box interoperability test at clamping rock and ore sample two ends, obtains the background polarizability η of proving installation _bwith background electricalresistivityρ _b, and the background potential value Δ U of the test electrode in supply current pulse width T moment _b(T) distance L of detecting electrode two interpolars described in, when interoperability test _b.

The described electrical quantity acquiring unit 202 of looking, according to the result that detects rock and ore sample to be measured, obtains the apparent chargeability η of described rock and ore sample to be measured _sapparent resistivity ρ with described rock and ore sample to be measured _s, and the test potential value Δ U of the test electrode in supply current pulse width T moment _mN(T), the distance L between described test electrode _mN.

Described true electrical quantity computing unit 203, for according to test parameter obtained above, by formula (the present invention)

${\mathrm{\η}}_0={\mathrm{\η}}_s+\left({\mathrm{\η}}_s{-\mathrm{\η}}_b\right)*\frac{\mathrm{\Δ}{U}_b\left(T\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_b\left(T\right)},$

${\mathrm{\ρ}}_0={\mathrm{\ρ}}_s+({\mathrm{\ρ}}_s-{\mathrm{\ρ}}_b)*\frac{L_b}{L_{\mathrm{MN}}-L_b},$

Calculate the true pole rate η of described rock and ore sample to be measured ₀with true resistivity ρ ₀.

As one embodiment of the present of invention, described in the measuring current density described rock and ore sample to be measured passed through depending on electrical quantity acquiring unit 202 be j ₀≤ 1-3uA/cm ².

As one embodiment of the present of invention, described rock and ore sample to be measured was soaked to underground water after 24 hours, then take out after drying and detect.

As one embodiment of the present of invention, adopt constant current source to power.

The receiver that receives test parameter has uV level measuring accuracy and 10 ⁹the input impedance of Ω.The test parameter that described receiver collects test electrode sends background electrical quantity acquiring unit to and looks electrical quantity acquiring unit, and described receiver meets the measuring accuracy of 0.1～1uV, has guaranteed low-resistance (10 ^-3Ω M) test of specimen of ore electrical quantity, 10 ⁹Ω input impedance has guaranteed high resistant (10 ⁶Ω M) do not shunt MN loop in rock test.Domestic and international existing receiver input impedance is 10M Ω, as sample electricalresistivityρ ₀=10 ⁵when Ω M, its resistance can be up to R ₀=4*10 ⁶Ω, like this, the resistivity of 10M Ω receiver test will reduce 30%.Meanwhile, because shunting causes the polarization of MN non-polarizing electrode, produce dual interference.

As one embodiment of the present of invention, between described potential electrode and described tested rock and ore sample, also there is moisture pad, described moisture pad and described rock and ore sample keep good contact, the area that contacts described rock and ore sample equates with the cross-sectional area of described rock and ore sample, can eliminate MN electrode (metal) and directly contact sample, the interference of the unsettled electrode potential extreme difference bringing.

By the device of above-described embodiment, can increase substantially rock and ore electric parameters testing precision, electricity (magnetic) method metallic ore is looked for to the ore deposit electrical information that provides the foundation.

Obtain background electrical quantity and look electrical quantity by proving installation as shown in Figure 3, thereby can obtain the true electrical quantity of rock and ore sample by the calculating of true electrical quantity computing unit, galvanic electrode A, galvanic electrode B are comprised at this Fig. 3, copper potential electrode M, potential electrode N, copper-bath 3, pottery infiltration plate 4, rock and ore sample 5, moisture pad 6, spring 7, folder power sensor 8, clamping screw 9, background electrical quantity acquiring unit 10, depending on electrical quantity acquiring unit 11, true electrical quantity computing unit 12, receiver 13, constant current source 14.

Described clamping screw 9 clamps the folder power of described rock and ore sample electric parameters testing, should clamp neither polarized electrode box docking (having moisture pad) test background electrical quantity and has identical folder power with taking off rock and ore sample, and folder power is that 5kg is shown by the power meter of folder.

Described background electrical quantity acquiring unit 10 be connected with copper potential electrode M, potential electrode N by receiver 13 respectively depending on electrical quantity acquiring unit 11, described background electrical quantity acquiring unit 10 be also connected with true electrical quantity computing unit 12 depending on electrical quantity acquiring unit 11.This receiver 13 can be by 10 ⁹high impedance and 32 s' A/D converter (A/D converter) forms, described potential electrode MN is connected with described high impedance, described high impedance is connected with described 32 A/D converters, the parameter by microcontroller, described detecting electrode MN being detected is again sent to background electrical quantity acquiring unit 10 and is looked electrical quantity acquiring unit 11 by wireless communication unit, and described wireless communication unit can be bluetooth unit or WIFI unit.

Described galvanic electrode A, galvanic electrode B are also connected with constant current source 14, wherein, and supply current I _aBnumerical value can send described background electrical quantity acquiring unit 10 to, look electrical quantity acquiring unit 11 by constant current source 14, when interoperability test described in the distance L of test electrode two interpolars _band distance L between test electrode when test rock and ore sample _mNall can obtain by measurement, for example, obtain above-mentioned range information by infrared distance measuring instrument, or can also measure by rule, by inputting reading realization to background electrical quantity acquiring unit 10 with depending on electrical quantity acquiring unit 11.

Rock and ore sample in electric parameters testing, should have identical occurrence status at nature with it, and test result just has authenticity.Rock and ore sample is composed and is stored in groundwater environment at nature, in the time that electricity (magnetic) method is reconnoitred, and the excitation of bearing utmost point low current density, for the distance=1000m between AB, power supply 10A, the current density at 100m place, AB mid point deep is only 0.001uA/cm ².Experiment shows, the electrical quantity of rock and ore is the function of the current density that flows through.Particularly metallic ore is at current density j ₀≤ 1-3uA/cm ²in scope, linear with electrical quantity, and negative and positive polarization difference is not obvious.Therefore rock and ore sample to be measured need soak underground water more than 24 hours, takes out after dry on surface and can addedly test, and measuring current density should be controlled at 1-3uA/cm ²in scope.

In electricity, the test request of the true electrical quantity of object is by the test that directly contacts with sample of high-conductive metal electrode, but, rock and ore sample is tested under wet condition, it does not allow again metal electrode directly to contact sample, otherwise, the AB electric current utmost point, in the time that electric current passes through, will produce polarization effect, the test of direct interference electrical quantity on electronic conductor and ion conductor interface.And MN potential electrode is as directly contacted with rock and ore sample, will produce unsettled electrode potential, its larger extreme difference disturbs the test of electrical quantity.In addition, the scope of the electrical quantity of rock and ore sample will look for ore deposit to survey looking electrical quantity to want large many (η more than field ₀=0.1-0.99% ρ ₀=10 ^-3-10 ⁶Ω M).The sample of higher, low resistivity, to the requirement of test macro very high (compared with looking for ore deposit test macro with field), therefore, correctly tests rock ore deposit sample and looks electrical quantity, need to retrain as follows the true electric parameters testing condition of rock and ore sample:

(1) AB galvanic electrode can not directly contact in the situation of sample, adopts four electrodes to test, i.e. galvanic electrode A, B, and detecting electrode M, N use AB constant current source power supply simultaneously, are to eliminate the better method that galvanic electrode polarization is disturbed electric parameters testing.Existing two utmost point devices, even if also adopt constant current source power supply, still can produce interference.

(2) MN potential electrode adopts the non-polarizing electrode similar non-polarizing electrodes such as (or) lead-lead chlorides of two identical copper one copper-baths, keep good contact by moisture (not being copper-bath) pad and rock and ore sample, can eliminate MN potential electrode (metal) and directly contact sample, the interference of the unsettled electrode potential extreme difference bringing.

(3) receiver 13 of reception detecting electrode MN detected parameters must possess uV level measuring accuracy and 10 simultaneously ⁹input impedance more than Ω.The measuring accuracy of 0.1～1uV, has guaranteed low-resistance (10 ^-3Ω M) test of specimen of ore electrical quantity, 10 ⁹Ω input impedance has guaranteed high resistant (10 ⁶Ω M) do not shunt MN loop in rock test.Domestic and international existing receiver input impedance is 10M Ω, as sample electricalresistivityρ ₀=10 ⁵when Ω M, its resistance can be up to R ₀=4*10 ⁶Ω, like this, the resistivity of 10M Ω receiver test will reduce 30%.Meanwhile, because shunting causes the polarization of MN non-polarizing electrode, produce dual interference.

Be illustrated in figure 4 the particular flow sheet of the true electric parameters testing method of a kind of rock and ore sample of the embodiment of the present invention.

Comprise step 401, the background electrical quantity of pick-up unit in the situation that pick-up unit is not put into rock and ore, tests (moisture pad being docked according to the embodiment of above-mentioned Fig. 3) by detecting electrode MN docking.

In the identical AB electric current I of constant current source _aBunder excitation, under identical clamping pressure (identical with the clamping force of test when rock and ore, can to regulate by folder power sensor 8), the background potential value Δ U between test electrode MN _b(0) with Δ U _b(T).Wherein, T is current pulse width (time base), 0 with T respectively for for electrical zero moment and T moment.Can try to achieve thus the electrical quantity polarizability η that system background disturbs _band electricalresistivityρ _b

${\mathrm{\η}}_b=\frac{\mathrm{\Δ}{U}_b\left(T\right)-\mathrm{\Δ}{U}_b\left(0\right)}{\mathrm{\Δ}{U}_b\left(T\right)}---\left(1\right)$

${\mathrm{\ρ}}_b=\frac{\mathrm{\Δ}{U}_b\left(0\right)}{I_{\mathrm{AB}}}*\frac{S_b}{L_b}---\left(2\right)$

S in formula _bfor moisture pad area, it and the identical (S of sectional area of tested rock and ore sample _b=S ₀), L _bduring for interoperability test, the distance between MN two copper-bases.

The direct tactite specimen of ore of AMNB4 electrode is tested true electrical quantity

Step 403, establishes the true electrical quantity of rock and ore sample.

Comprise polarizability parameter η ₀with resistance parameter ρ ₀.Their definition is respectively:

${\mathrm{\η}}_0=\frac{\mathrm{\Δ}{U}_0\left(T\right)-\mathrm{\Δ}{U}_0\left(0\right)}{\mathrm{\Δ}{U}_0\left(T\right)}---\left(3\right)$

${\mathrm{\ρ}}_0=\frac{\mathrm{\Δ}{U}_0\left(0\right)}{I_{\mathrm{AB}}}*\frac{S_0}{L_0}---\left(4\right)$

Δ U in formula ₀(0), Δ U ₀(T) be respectively MN loop, zero moment of current impulse recording and the current potential difference in T moment, I _aBammeter by constant current source power supply unit is indicated.

Step 402, measures the electrical quantity of looking of rock and ore sample.

Because rock and ore sample is to test electrical quantity under aqueous conditions, AMNB4 electrode can only indirect contact sample, the electrical quantity of surveying for looking electrical quantity, comprise apparent chargeability parameter η _swith apparent resistivity ρ _s, actual measurement MN current potential is respectively Δ U _mN(0) with Δ U _mN(T).Can try to achieve the apparent chargeability parameter η of rock and ore sample _s:

${\mathrm{\η}}_s=\frac{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_{\mathrm{MN}}\left(0\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)}---\left(5\right)$

By actual measurement potential electrode MN current potential Δ U _mN(0), can obtain rock and ore sample apparent resistivity ρ _s:

${\mathrm{\ρ}}_s=\frac{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(0\right)}{I_{\mathrm{AB}}}*\frac{S_0}{L_{\mathrm{MN}}}---\left(6\right)$

I in formula _aBthe strength of current of constant current source excitation, L _mNit is the distance between the copper-base of two non-polarizing electrodes.

Step 404, according to the described true electrical quantity that calculates described rock and ore sample depending on electrical quantity and background electrical quantity.

According to ${\mathrm{\η}}_0={\mathrm{\η}}_s+({\mathrm{\η}}_s-{\mathrm{\η}}_b)*\frac{\mathrm{\Δ}{U}_b\left(T\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_b\left(T\right)}$ Calculate the true pole rate parameter η of rock and ore sample ₀,

According to ${\mathrm{\ρ}}_0={\mathrm{\ρ}}_S+({\mathrm{\ρ}}_S-{\mathrm{\ρ}}_b)*\frac{L_b}{L_{\mathrm{MN}}-L_B}$ Calculate the true resistivity parameter ρ of rock and ore sample ₀.

Following as an embodiment, two of test rock and ores, one is porphyry rocks sample, another piece is ribbon pyrite, chalcopyrite moderate content specimen of ore.

Two samples measure-alike, length L o=0.1m, section S o=0.05m*0.05m=0.0025m ²; Between potential electrode MN without sample interoperability test (comprising moisture pad etc.) MN distance, L _b=0.027m; Two samples when power supply bases and strength of current is, time base T=2S(second), strength of current I _aB=25uA(j ₀=1uA/cm ²); Potential electrode MN potential test value is, rock sample: , specimen of ore: without sample interoperability test: $\begin{array}{c}\mathrm{\Δ}{U}_b\left(0\right)=2.65\mathrm{mV}\\ \mathrm{\Δ}{U}_b\left(T\right)=2.73\mathrm{mV}\end{array}.$

Rock sample actual measurement depending on electrical quantity is: $\begin{array}{c}{\mathrm{\η}}_S=\frac{956.8-913.7}{956.8}=0.045\\ {\mathrm{\ρ}}_S=\frac{913.7*{10}^{-3}}{25*{10}^{-6}}*\frac{0.0025}{0.127}=719\mathrm{\ΩM}\end{array};$

The true electrical quantity of rock sample is: $\begin{array}{c}{\mathrm{\η}}_0=0.045+(0.045-0.029)*\frac{2.73}{956.8-2.73}=0.045\\ {\mathrm{\ρ}}_0=719+(719-9.8)*\frac{0.027}{0.127}=911\mathrm{\ΩM}\end{array};$

Ratio depending on, true electrical quantity:

Specimen of ore depending on electrical quantity is: $\begin{array}{c}{\mathrm{\η}}_s=\frac{3.50-2.79}{3.50}=0.203\\ {\mathrm{\ρ}}_s=\frac{2.79*{10}^{-3}}{25*{10}^{-0}}*\frac{0.0025}{0.127}=2.2\mathrm{\ΩM}\end{array};$

The true electrical quantity of specimen of ore is: $\begin{array}{c}{\mathrm{\η}}_0=0.23+(0.203-0.029)*\frac{2.72}{3.50-2.73}=0.81\\ {\mathrm{\ρ}}_0=2.2+(2.2-9.8)*0.27=0.15\mathrm{\ΩM}\end{array};$

Ore depending on, true Contrast of Electrical Parameter is:

Method and device advantage by the embodiment of the present invention are: standard and rock and ore sample electric parameters testing condition and technical requirement, the background electrical quantity that discovery system is existed disturbs and is confirmed, obtain in theory the computing formula that solves true electrical quantity simultaneously, thereby it is true, reliable to make to record rock and ore sample electrical quantity, solved the defect that existing rock and ore sample test system can not record true electrical quantity, improved Geophysical Prospecting FORWARD AND INVERSE PROBLEMS interpretation level with the electrical information of looking for ore deposit correct is provided.

The present invention can realize with any suitable form, comprises hardware, software, firmware or their combination in any.According to circumstances selectively part realization of the present invention, such as software performing is in one or more data processors and digital signal processor.The element of each embodiment herein and assembly can be physically, in function, realize in any suitable manner in logic.In fact, function can be in separate unit, in one group of unit or as a part for other functional units, realize.Therefore, this system and method both can be realized in separate unit, also can physically and in function, be distributed between different unit and processor.

Technician in association area will recognize that, embodiments of the invention have many possible modifications and combination, although form is slightly different, still adopts identical fundamental mechanism and method.For the object of explaining, aforementioned description is with reference to several specific embodiment.But above-mentioned illustrative discussion is not intended to precise forms exhaustive or that restriction is invented herein.Above, many modifications and variations are possible.Selected and described embodiment, in order to explain principle of the present invention and practical application thereof, uses so that those skilled in the art can utilize the modification for application-specific, the distortion of the present invention and each embodiment best.

Claims (10)

1. the true electric parameters testing method of rock and ore sample, is characterized in that comprising,

Proving installation is clamped to the test electrode box interoperability test at rock and ore sample two ends, draw the background polarizability η of this proving installation _bwith background electricalresistivityρ _b, and the background potential value Δ U of the test in supply current pulse width T moment _b(T) distance L of test electrode two interpolars described in, when interoperability test _b;

Test rock and ore sample to be measured, obtain the apparent chargeability η of described rock and ore sample to be measured _sapparent resistivity ρ with described rock and ore sample to be measured _s, and potential value Δ U between the test electrode in supply current pulse width T moment _mN(T), the distance L between described test electrode _mN;

According to test parameter obtained above, by formula of the present invention:

${\mathrm{\η}}_0={\mathrm{\η}}_s+\left({\mathrm{\η}}_s{-\mathrm{\η}}_b\right)*\frac{\mathrm{\Δ}{U}_b\left(T\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_b\left(T\right)},$

${\mathrm{\ρ}}_0={\mathrm{\ρ}}_s+({\mathrm{\ρ}}_s-{\mathrm{\ρ}}_b)*\frac{L_b}{L_{\mathrm{MN}}-L_b},$

Calculate the true pole rate η of described rock and ore sample to be measured ₀with true resistivity ρ ₀.

2. the true electric parameters testing method of a kind of rock and ore sample according to claim 1, is characterized in that, adopts constant current source to power.

3. the true electric parameters testing method of a kind of rock and ore sample according to claim 1, is characterized in that, the receiver that receives described test parameter has uV level measuring accuracy and 10 ⁹input impedance more than Ω.

4. the true electric parameters testing method of a kind of rock and ore sample according to claim 1, is characterized in that, described proving installation has 4 electrodes, is respectively the potential electrode of 2 non-polarizing electrodes and the galvanic electrode of 2 non-polarizing electrodes.

5. the true electric parameters testing method of a kind of rock and ore sample according to claim 4, it is characterized in that, the galvanic electrode of the potential electrode of described 2 non-polarizing electrodes and 2 non-polarizing electrodes all adopts the non-polarizing electrode of identical copper one copper-bath, or adopts the non-polarizing electrode of lead-lead chloride.

6. the true Testing device of electrical parameter of rock and ore sample, is characterized in that comprising,

Background electrical quantity acquiring unit, depending on electrical quantity acquiring unit, true electrical quantity computing unit;

Described background electrical quantity acquiring unit, for the test electrode box interoperability test to proving installation clamping rock and ore sample two ends, obtains the background polarizability η of proving installation _bwith background electricalresistivityρ _b, and the background potential value Δ U of the test electrode in supply current pulse width T moment _b(T) distance L of test electrode two interpolars described in, when interoperability test _b;

The described electrical quantity acquiring unit of looking, according to the result of test rock and ore sample to be measured, obtains the apparent chargeability η of described rock and ore sample to be measured _sapparent resistivity ρ with described rock and ore sample to be measured _s, and current potential Δ U between the test electrode in supply current pulse width T moment _mN(T), the distance L between described test electrode _mN;

Described true electrical quantity computing unit, for according to test parameter obtained above, passes through

${\mathrm{\η}}_0={\mathrm{\η}}_s+\left({\mathrm{\η}}_s{-\mathrm{\η}}_b\right)*\frac{\mathrm{\Δ}{U}_b\left(T\right)}{\mathrm{\Δ}{U}_{\mathrm{MN}}\left(T\right)-\mathrm{\Δ}{U}_b\left(T\right)},$

${\mathrm{\ρ}}_0={\mathrm{\ρ}}_s+({\mathrm{\ρ}}_s-{\mathrm{\ρ}}_b)*\frac{L_b}{L_{\mathrm{MN}}-L_b},$

Calculate the true pole rate η of described rock and ore sample to be measured ₀with true resistivity ρ ₀.

7. the true Testing device of electrical parameter of a kind of rock and ore sample according to claim 6, is characterized in that, adopts constant current source to power.

8. the true Testing device of electrical parameter of a kind of rock and ore sample according to claim 6, is characterized in that, the receiver that receives described detected parameters has uV level measuring accuracy and 10 ⁹input impedance more than Ω.

9. the true Testing device of electrical parameter of a kind of rock and ore sample according to claim 6, it is characterized in that, described pick-up unit comprises 4 electrodes, be respectively the potential electrode of 2 non-polarizing electrodes and the galvanic electrode of 2 non-polarizing electrodes, described 2 potential electrodes and 2 galvanic electrodes are positioned at rock and ore sample two ends respectively.

10. the true Testing device of electrical parameter of a kind of rock and ore sample according to claim 9, it is characterized in that, described 2 potential electrodes and described 2 galvanic electrodes all adopt the non-polarizing electrode of identical copper one copper-bath, or adopt the non-polarizing electrode of lead-lead chloride.