CN103913634B - A kind of rock and ore sample true electric parameters testing method and device - Google Patents

Abstract

The present invention relates to rock and ore field of measuring technique, be concretely a kind of rock and ore sample true electric parameters testing method and device.By the test electrode box docking test at test device clamping rock and ore sample two ends, draw the background polarizability η of this test device_bWith background electricalresistivityρ_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；According to test parameter obtained above, calculated true pole rate η of described rock and ore sample to be measured by specific formulation of the present invention₀With true resistivity ρ₀.By the method and apparatus of above-described embodiment, rock and ore electric parameters testing precision can be greatly improved, look for ore deposit to provide the foundation electrical information electricity (magnetic) method metallic ore.

Description

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

Technical field

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

Background technology

The electrical quantity of test rock and ore sample.Understand the difference that ore body is electrical with country rock, be to determine that can electricity (magnetic) method Effectively look for the physical property premise in ore deposit.Also it is the objective basis of forward modelling and inversion interpretation.For Geophysical Prospecting, There is basic significance.

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

The test of rock and ore sample electrical quantity, is typically all and imitates field to look for ore deposit to test apparatus and method.Test system by The compositions such as test specimen frame, small-power transmitter and receiver (or use look for ore deposit receiver).GDD company of Canada SCIP test system have employed two pole devices (existing document points out that its test philosophy is wrong).

The electrical quantity of test rock and ore sample, it should be the true electrical quantity of sample, but existing domestic and international rock and ore sample Electronic parameter test system, the electrical quantity surveyed is not true electrical quantity, but a kind of mistake the biggest regarding electrical quantity.

The error reason is caused to be, the test condition of sample and technology requirement, all lack standardization in situ, and test There is the interference of background electrical quantity in system.Mainly have:

1. in order to improve measuring accuracy, high current density the most in testing, this current density substantially exceeds electricity (magnetic) The current density that when method is reconnoitred, rock and ore stands, is disturbed by current non-linear for good ore of leading, and makes institute's this electricity of mark ginseng Number is not original position electrical quantity.

2. in sample electric parameters testing, power supply source all uses voltage source, causes surveyed electrical quantity by the pole of galvanic electrode Change interference.Surveyed parameter is not the real parameter of sample.

3. the receiver used of test specimen, is not provided simultaneously with the technology requirement of high accuracy and high input impedance, causes low Resistance sample potential test precision is inadequate, and high resistant sample shunting MN loop causes unpolarizable electrode to produce polarization, is surveyed electricity Parameter is by dual interference.

4. test fails to eliminate the background electrical quantity interference that test system exists, cause the surveyed good electricity ginseng leading ore Number, with the difference that its true value has the order of magnitude.Much look in the data of ore deposit and also surveyed wrong parameter being answered as true electrical quantity With.

Cause the reason of electric parameters testing mistake, mainly the test condition of electrical quantity is required understanding deficiency with technology. Lack the research to the test rock ore deposit true electrical quantity of sample.Another major reason is to survey in " induced polarization method technical stipulation " Examination required precision is weighed to repeat relative error.Relative error reflection is the accidental error in test, and precision is Referring to the degree that test value is close with true value, trueness error not only reflects accidental error, reflects systematic error simultaneously.At rock In specimen of ore electric parameters testing, two kinds of errors all exist.If but only note repeating relative error, ignore system Error, will appear from gross mistake for good the surveyed electrical quantity of massive ore of leading.

Summary of the invention

It is an object of the invention to correctly test the true electrical quantity of rock and ore sample, specification of the present invention test condition and skill Art requirement, and eliminate the background electrical quantity interference existed by the test system that present invention discover that in testing, accordingly this Bright embodiment provides the method for testing of a kind of true electrical quantity of rock and ore sample, including,

Normative testing condition and technology requirement, and every piece of rock and ore sample to be measured has to pass through twice test result, warp Invention formula is calculated the true electrical quantity of every piece of rock and ore sample.Test for the first time is the rock and ore mark to be measured of test This, 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 supply current pulse width T moment potential value Δ U_MN(T), distance L between described test potential electrode_MN；

Second time test is the background electrical quantity interference that test system exists, and i.e. takes off and has tested the rock and ore regarding electrical quantity Sample, by two testing cassete docking 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), during docking test between described potential electrode Distance L_b；

Parameter is recorded, by the formula of invention according to obtained above:

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

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

Calculate true pole rate η of described rock and ore sample to be measured₀With true resistivity ρ₀。

One further aspect of the most described a kind of rock and ore sample true electric parameters testing method, Employing constant-current source is powered.

Another of the most described a kind of rock and ore sample true electric parameters testing method further side Face, the receiver receiving described test parameter has uV level measuring accuracy and 10⁹The input impedance of more than Ω.

Another of the most described a kind of rock and ore sample true electric parameters testing method is further square Face, described test device be the potential electrode of 4 pole collating units, respectively 2 unpolarizable electrodes and 2 do not polarize The galvanic electrode of electrode.

Another of the most described a kind of rock and ore sample true electric parameters testing method is further square Face, the test electrode of described 2 unpolarizable electrodes and the galvanic electrode of 2 unpolarizable electrodes be in two identical In the unpolarizable electrode box of copper one copper-bath, or in the unpolarizable electrode of lead-lead chloride, it is respectively placed in rock ore deposit Stone sample two ends.

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

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

Described regarding electrical quantity acquiring unit, according to the result of test rock and ore sample to be measured, obtain described rock and ore to be measured The apparent chargeability η of sample_sApparent resistivity ρ with described rock and ore sample to be measured_s, and during supply current pulse width T The test potential value Δ U carved_MN(T), distance L between described test electrode_MN；

Described background electrical quantity acquiring unit, is to survey after the rock and ore sample of electrical quantity for two electrodes taking off Box docking test, obtains testing the background polarizability η of device_bWith background electricalresistivityρ_b, and supply current pulse width The background potential value Δ U of the potential electrode in T moment_b(T), distance L of described potential electrode two interpolar during docking test_b；

Described true electrical quantity computing unit, is used 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 true pole rate η of described rock and ore sample to be measured₀With true resistivity ρ₀。

One further aspect of the most described a kind of true Testing device of electrical parameter of rock and ore sample, Employing constant-current source is powered.

Another of the most described a kind of true Testing device of electrical parameter of rock and ore sample further side Face, the receiver receiving described test parameter has uV level measuring accuracy and 10⁹The input impedance of more than Ω.

By the method and apparatus of above-described embodiment, rock and ore electric parameters testing precision can be greatly improved, to electricity (magnetic) method metallic ore looks for ore deposit to provide real basis electrically information.

Accompanying drawing explanation

Read the detailed description to embodiment in conjunction with the following drawings, the features described above of the present invention and advantage, and extra Feature and advantage, it will clearer.

Fig. 1 show the flow chart of the embodiment of the present invention a kind of rock and ore sample true electric parameters testing method；

Fig. 2 show the structural representation of the embodiment of the present invention a kind of rock and ore true Testing device of electrical parameter of sample；

Fig. 3 show a kind of test apparatus structure schematic diagram of the embodiment of the present invention；

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

Detailed description of the invention

Explained below can make any those skilled in the art utilize the present invention.Provided in specific embodiment and application Description information merely illustrative.The various extensions of embodiment as described herein and combination are for those skilled in the art Being apparent from, without departing from the spirit and scope of the present invention, the rule of present invention definition is permissible It is applied in other embodiments and application.Therefore, the present invention is not limited solely to shown embodiment, and the present invention contains and this Principle shown in literary composition and the consistent maximum magnitude of feature.

It is illustrated in figure 1 the flow chart of the embodiment of the present invention a kind of rock and ore sample true electric parameters testing method.

Including step 101, by the test electrode box docking test at clamping rock and ore sample two ends, draw the basis of this device Sole rate η_bWith background electricalresistivityρ_b, and the background potential value of the test electrode in supply current pulse width T moment ΔU_b(T), distance L of described test electrode two interpolar during docking 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_sWith described The apparent resistivity ρ of rock and ore sample to be measured_s, and the test potential of the test electrode in supply current pulse width T moment Value Δ U_MN(T), distance L between described test electrode_MN。

In no particular order, simply citing in this example, it is right to be not construed as the execution sequence of above-mentioned steps 101 and 102 The restriction of scope.

Step 103, according to detection parameter 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 true pole rate η of described rock and ore sample to be measured₀With true resistivity ρ₀。

As one embodiment of the present of invention, in described step 102, the test that described rock and ore sample to be measured passes through Current density j₀≤1-3uA/cm²。

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

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

As one embodiment of the present of invention, constant-current source is used to be powered.

Receiver described in reception has uV level measuring accuracy and 10⁹The input impedance of more than Ω.Described receiver will be surveyed The test parameter that examination electrode collects sends background electrical quantity acquiring unit to and regards electrical quantity acquiring unit, and receiver accords with Close the measuring accuracy of 0.1～1uV, it is ensured that to low-resistance (10^-3Ω M) test of specimen of ore electrical quantity, 10⁹Ω is defeated Enter impedance and ensure that high resistant (10⁶Ω M) rock test in do not shunt MN loop.Domestic and international existing receiver is defeated Entering impedance is 10M Ω, as sample electricalresistivityρ₀=10⁵During Ω M, its resistance may be up to R₀=4*10⁶Ω, so, The resistivity of 10M Ω receiver test to reduce 30%.Simultaneously as shunting causes MN unpolarizable electrode to polarize, produce Raw dual interference.

As one embodiment of the present of invention, described 2 potential electrode MN and 2 galvanic electrode AB use (AMNB) Arrangement mode, is respectively placed in AM Yu BN in the polarizing electrode box of two copper-copper-baths, is placed in rock ore deposit to be measured Power supply and potential test are implemented in the two ends of stone sample.

As one embodiment of the present of invention, also have between described test electrode and described tested rock and ore sample and contain Water cushion sheet, the area of aqueous pad is equal with the cross-sectional area of described rock and ore sample, can eliminate MN electrode (metal) Directly contact sample, the interference of the unstable electrode potential extreme difference brought.

By the method for above-described embodiment, rock and ore electric parameters testing precision can be greatly improved, to electricity (magnetic) Method metallic ore looks for ore deposit to provide correct basis electrically information.

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

Including, 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 the electrode box docking at clamping rock and ore sample two ends is tested, Obtain testing the background polarizability η of device_bWith background electricalresistivityρ_b, and the test in supply current pulse width T moment The background potential value Δ U of electrode_b(T), distance L of described detecting electrode two interpolar during docking test_b。

Described regarding electrical quantity acquiring unit 202, according to the result of detection rock and ore sample to be measured, obtain described rock to be measured The apparent chargeability η of specimen of ore_sApparent resistivity ρ with described rock and ore sample to be measured_s, and supply current pulse width T The test potential value Δ U of the test electrode in moment_MN(T), distance L between described test electrode_MN。

Described true electrical quantity computing unit 203, for according to test parameter obtained above, by formula (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 true pole rate η of described rock and ore sample to be measured₀With true resistivity ρ₀。

As one embodiment of the present of invention, described logical to described rock and ore sample to be measured regarding electrical quantity acquiring unit 202 The test current density crossed is j₀≤1-3uA/cm²。

As one embodiment of the present of invention, after described rock and ore sample to be measured is soaked underground water 24 hours, then Taking-up detects after drying.

As one embodiment of the present of invention, constant-current source is used to be powered.

The receiver receiving test parameter has uV level measuring accuracy and 10⁹The input impedance of Ω.Described receiver will be surveyed The test parameter that examination electrode collects sends background electrical quantity acquiring unit to and regards electrical quantity acquiring unit, described reception Machine meets the measuring accuracy of 0.1～1uV, it is ensured that to low-resistance (10^-3Ω M) test of specimen of ore electrical quantity, 10⁹ Ω input impedance ensure that high resistant (10⁶Ω M) rock test in do not shunt MN loop.Domestic and international existing reception Machine input impedance is 10M Ω, as sample electricalresistivityρ₀=10⁵During Ω M, its resistance may be up to R₀=4*10⁶Ω, this Sample, the resistivity of 10M Ω receiver test to reduce 30%.Simultaneously as shunting causes MN unpolarizable electrode to polarize, Produce dual interference.

As one embodiment of the present of invention, also have between described potential electrode and described tested rock and ore sample and contain Water cushion sheet, described aqueous pad keeps good contact with described rock and ore sample, contacts the area of described rock and ore sample Equal with the cross-sectional area of described rock and ore sample, MN electrode (metal) can be eliminated and directly contact sample, bring The interference of unstable electrode potential extreme difference.

By the device of above-described embodiment, rock and ore electric parameters testing precision can be greatly improved, to electricity (magnetic) Method metallic ore looks for ore deposit to provide the foundation electrical information.

Obtain background electrical quantity by test device as shown in Figure 3 and regard electrical quantity, by true electrical quantity computing unit Calculating it is hereby achieved that the true electrical quantity of rock and ore sample, this Fig. 3 includes galvanic electrode A, galvanic electrode B, copper potential electrode M, potential electrode N, copper-bath 3, ceramic percolation plate 4, rock and ore sample 5, Aqueous pad 6, spring 7, grip force sensor 8, clamping screw 9, background electrical quantity acquiring unit 10, depending on electricity ginseng Number acquiring unit 11, true electrical quantity computing unit 12, receiver 13, constant-current source 14.

Described clamping screw 9 clamps the grip force of described rock and ore sample electric parameters testing, should with take off rock and ore specimen holder Tight two unpolarizable electrode box docking (having aqueous pad) test background electrical quantitys have identical grip force, and grip force is that 5kg is by pressing from both sides Power meter shows.

Described background electrical quantity acquiring unit 10 and regard electrical quantity acquiring unit 11 respectively by receiver 13 with copper Potential electrode M, potential electrode N be connected, described background electrical quantity acquiring unit 10 and regard electrical quantity and obtain single Unit 11 is also connected with true electrical quantity computing unit 12.This receiver 13 can be by 10⁹The mould of high impedance and 32/ Number converter (A/D converter) constitute, described potential electrode MN is connected with described high impedance, described high impedance and Described 32 A/D converters are connected, then the parameter that described detecting electrode MN detects are passed through by microcontroller Wireless communication unit is sent to background electrical quantity acquiring unit 10 and regards electrical quantity acquiring unit 11, described radio 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_ABNumber Value can by constant-current source 14 send described background electrical quantity acquiring unit 10 to, regarding electrical quantity acquiring unit 11, right Connect distance L of described test electrode two interpolar during test_bAnd the distance between test electrode during test rock and ore sample L_MNAll can be obtained by measurement, such as, obtain above-mentioned range information by infrared distance measuring instrument, or all right Measured by rule, by background electrical quantity acquiring unit 10 with regarding electrical quantity acquiring unit 11 input reading Number realizes.

Rock and ore sample in electric parameters testing, should have identical occurrence status with it at nature, and test result just has Authenticity.Rock and ore sample is composed at nature and is stored in groundwater environment, when electricity (magnetic) method is reconnoitred, subjects extremely low The excitation of current density, for the distance=1000m between AB, at power supply 10A, AB deep, midpoint 100m Current density is only 0.001uA/cm².Experiment shows, the electrical quantity of rock and ore is the function of the current density flow through. Particularly metallic ore is in current density j₀≤1-3uA/cm²In the range of, linear with electrical quantity, and negative and positive Polarization difference is inconspicuous.Rock and ore sample the most to be measured need to soak underground water more than 24 hours, after taking-up surface is dried Can added test, test current density should control at 1-3uA/cm²In the range of.

In electricity, the test request of the true electrical quantity of object is directly contacted with sample by high-conductive metal electrode test, but Being that rock and ore sample is tested in humid conditions, it does not the most allow metal electrode directly to contact sample, otherwise, AB electric current pole, when electric current passes through, will produce polarity effect, direct interference on electronic conductor with ion conductor interface The test of electrical quantity.And MN potential electrode is as directly contacted with rock and ore sample, unstable electrode potential will be produced, The test of its bigger extreme difference interference electrical quantity.Additionally, the scope of the electrical quantity of rock and ore sample to look for ore deposit more than field Surveyed and regarded many (η that electrical quantity wants big₀=0.1-0.99%ρ₀=10^-3-10⁶Ω M).Higher, the mark of low resistivity This, the requirement the highest (look for ore deposit test system with field compared with) to test system, therefore, correct test rock ore deposit sample Depending on electrical quantity, electric parameters testing condition true to rock and ore sample is needed to retrain as follows:

(1), in the case of AB galvanic electrode directly can not contact sample, four electrodes are used to test, i.e. electric current Electrode A, B, detecting electrode M, N, use AB constant current source power supply simultaneously, be to eliminate galvanic electrode polarization to survey electrical quantity The better method of examination interference.Existing two pole devices, even if being also adopted by constant current source power supply, still can produce interference.

(2) MN potential electrode uses unpolarizable electrode (or the lead-chlorination of two identical copper one copper-baths The similar unpolarizable electrode such as lead), keep well connecing by aqueous (not being copper-bath) pad and rock and ore sample Touch, MN potential electrode (metal) can be eliminated and directly contact sample, doing of the unstable electrode potential extreme difference brought Disturb.

(3) receiver 13 receiving detecting electrode MN detection parameter must be provided simultaneously with uV level measuring accuracy and 10⁹Ω Above input impedance.The measuring accuracy of 0.1～1uV, it is ensured that to low-resistance (10^-3Ω M) specimen of ore electrical quantity Test, 10⁹Ω input impedance ensure that high resistant (10⁶Ω M) rock test in do not shunt MN loop.The most existing Some receiver input impedance is 10M Ω, as sample electricalresistivityρ₀=10⁵During Ω M, its resistance may be up to R₀=4*10⁶ Ω, so, the resistivity of 10M Ω receiver test to reduce 30%.Simultaneously as shunting causes MN not polarize electricity Polarizing in pole, produces dual interference.

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

Including step 401, in the case of detection device does not put into rock and ore, detect the background electrical quantity of device, will inspection Survey electrode MN docking to carry out testing (being docked by aqueous pad according to the embodiment of above-mentioned Fig. 3).

At the AB electric current I that constant-current source is identical_ABUnder excitation, (with folder during test rock and ore under identical clamping pressure Clamp force is identical, can be adjusted by grip force sensor 8), the background potential value between test electrode MN ΔU_b(0) with Δ U_b(T).Wherein, T is current pulse width (time base), 0 with T respectively for during for the electrical zero moment with T Carve.Thus can try to achieve the electrical quantity polarizability η of system background interference_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 aqueous pad area, its identical (S of sectional area with tested rock and ore sample_b=S₀), L_bFor right Distance when connecing test, between MN two copper-base.

AMNB4 electrode direct tactite specimen of ore tests true electrical quantity

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

Including polarizability parameter η₀With resistance parameter ρ₀.Their definition is respectively as follows:

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

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

Δ U in formula₀(0)、ΔU₀(T) current potential in MN loop, current impulse zero moment recorded and T moment it is respectively Difference, I_ABIndicated by the ammeter of constant current source power supply unit.

Step 402, measure rock and ore sample regarding electrical quantity.

Due to rock and ore sample be under aqueous conditions test electrical quantity, AMNB4 electrode can only mediate contact sample, Surveyed electrical quantity is regarding electrical quantity, including apparent chargeability parameter η_sWith apparent resistivity ρ_s, actual measurement MN current potential is respectively ΔU_MN(0) with Δ U_MN(T).Apparent chargeability parameter η of rock and ore sample can be tried to achieve_s:

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

Electrode MN current potential Δ U is measured by actual measurement_MN(0) rock and ore sample apparent resistivity ρ can, be obtained_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_ABIt is the current strength of constant-current source excitation, L_MNIt it is the distance between the copper-base of two unpolarizable electrodes.

Step 404, according to the described true electrical quantity calculating described rock and ore sample regarding 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 true pole rate parameter η of rock and ore sample₀,

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 sample₀。

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

Two pieces of samples equivalently-sized, length Lo=0.1m, cross section So=0.05m*0.05m=0.0025m²；Current potential electricity Without sample docking test (including aqueous pad etc.) MN distance, L between the MN of pole_b=0.027m；When two samples are powered Base with current strength is, time the base T=2S(second), current strength I_AB=25uA(j₀=1uA/cm²)；Potential electrode MN potential test value is, rock sample:, specimen of ore: Without sample docking 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 regard electrical quantity as: $\begin{array}{c}{\mathrm{\η}}_S=\frac{956.8-913.7}{956.8}=0.045\\ {\mathrm{\ρ}}_S=\frac{913.7*{10}^{-3}}{25*{10}^{-6}}*\frac{0.0025}{0.127}=719\mathrm{\ΩM}\end{array};$

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

Depending on, the ratio of true electrical quantity:

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

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 regards, true Contrast of Electrical Parameter as:

Be by the method and device advantage of the embodiment of the present invention: specification and rock and ore sample electric parameters testing condition with Technology requirement, the background electrical quantity interference that there is discovery system is confirmed, and achieves in theory simultaneously and solves very The computing formula of electrical quantity, so that it is true, reliable to record rock and ore sample electrical quantity, solves existing rock and ore mark This test system can not record the defect of true electrical quantity, improve Geophysical Prospecting FORWARD AND INVERSE PROBLEMS interpretation level with carry Supply the electrical information looking for ore deposit correct.

The present invention can realize in any suitable form, including hardware, software, firmware or their any combination. The present invention can according to circumstances partly realize, and such as software performing processes in one or more data Device and digital signal processor.The element of each embodiment herein and assembly can physically, functionally, patrol Realize in any suitable manner on Ji.It is true that function can in separate unit, in one group of unit, Or the part as other functional units realizes.Therefore, this system and method both can realize in separate unit, Can also physically and functionally be distributed between different unit and processor.

Skilled person will appreciate that in the related art, embodiments of the invention have many possible amendments and group Close, although form is slightly different, and still uses identical fundamental mechanism and method.For purposes of explanation, described above With reference to several specific embodiment.But, above-mentioned illustrative discussion is not intended to exhaustive or limits what this paper was invented Precise forms.Shown in above, many modifications and variations are possible.Selected and described embodiment, in order to explain The principle of the present invention and actual application thereof, in order to enable those skilled in the art to utilize the present invention real with each best Execute the amendment for application-specific of example, deformation.

Claims (10)

1. a rock and ore sample true electric parameters testing method, it is characterised in that include,

By the test electrode box docking test at test device clamping rock and ore sample two ends, draw the background of this test device Polarizability η_bWith background electricalresistivityρ_b, and the background potential value of the test in supply current pulse width T moment ΔU_b(T), distance L of described test electrode two interpolar during docking test_b；

Test rock and ore sample to be measured, obtain the apparent chargeability η of described rock and ore sample to be measured_sWith described rock and ore to be measured The apparent resistivity ρ of sample_s, and the test interelectrode potential value Δ U in supply current pulse width T moment_MN(T), Distance L between described test electrode_MN；

According to test parameter obtained above, pass through formula:

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

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

Calculate true pole rate η of described rock and ore sample to be measured₀With true resistivity ρ₀。

A kind of rock and ore sample true electric parameters testing method the most according to claim 1, it is characterised in that use Constant-current source is powered.

A kind of rock and ore sample true electric parameters testing method the most according to claim 1, it is characterised in that receive The receiver of described test parameter has uV level measuring accuracy and 10⁹The input impedance of more than Ω.

A kind of rock and ore sample true electric parameters testing method the most according to claim 1, it is characterised in that described Test device has potential electrode and the electric current of 2 unpolarizable electrodes of 4 electrodes, respectively 2 unpolarizable electrodes Electrode.

A kind of rock and ore sample true electric parameters testing method the most according to claim 4, it is characterised in that described The galvanic electrode of the potential electrode of 2 unpolarizable electrodes and 2 unpolarizable electrodes all uses identical copper one copper sulphate molten The unpolarizable electrode of liquid, or use the unpolarizable electrode of lead-lead chloride.

6. the true Testing device of electrical parameter of rock and ore sample, it is characterised in that include,

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 pair to test device clamping rock and ore sample two ends Connect test, obtain testing the background polarizability η of device_bWith background electricalresistivityρ_b, and during supply current pulse width T The background potential value Δ U of the test electrode carved_b(T), distance L of described test electrode two interpolar during docking test_b；

Described regarding electrical quantity acquiring unit, according to the result of test rock and ore sample to be measured, obtain described rock and ore to be measured The apparent chargeability η of sample_sApparent resistivity ρ with described rock and ore sample to be measured_s, and during supply current pulse width T The test interelectrode current potential Δ U carved_MN(T), distance L between described test electrode_MN；

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

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

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

Calculate true pole rate η of described rock and ore sample to be measured₀With true resistivity ρ₀。

A kind of true Testing device of electrical parameter of rock and ore sample the most according to claim 6, it is characterised in that use Constant-current source is powered.

A kind of true Testing device of electrical parameter of rock and ore sample the most according to claim 6, it is characterised in that receive The receiver of described test parameter has uV level measuring accuracy and 10⁹The input impedance of more than Ω.

A kind of true Testing device of electrical parameter of rock and ore sample the most according to claim 6, it is characterised in that described Test device includes potential electrode and the electric current of 2 unpolarizable electrodes of 4 electrodes, respectively 2 unpolarizable electrodes Electrode, described 2 potential electrodes and 2 galvanic electrodes are positioned at rock and ore sample two ends respectively.

A kind of true Testing device of electrical parameter of rock and ore sample the most according to claim 9, it is characterised in that institute State 2 potential electrodes and described 2 galvanic electrodes all use the unpolarizable electrode of identical copper one copper-bath, or Person uses the unpolarizable electrode of lead-lead chloride.