CN103064120A - Magnetoelectric comprehensive detecting instrument underground coal mine and magnetoelectric comprehensive detection method - Google Patents
Magnetoelectric comprehensive detecting instrument underground coal mine and magnetoelectric comprehensive detection method Download PDFInfo
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- CN103064120A CN103064120A CN2012105890180A CN201210589018A CN103064120A CN 103064120 A CN103064120 A CN 103064120A CN 2012105890180 A CN2012105890180 A CN 2012105890180A CN 201210589018 A CN201210589018 A CN 201210589018A CN 103064120 A CN103064120 A CN 103064120A
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Abstract
The invention relates to a magnetoelectric comprehensive detecting instrument underground a coal mine and a magnetoelectric comprehensive detection method. The magnetoelectric comprehensive detecting instrument underground the coal mine comprises a transmitter and a receiver, and is characterized in that the transmitter comprises a transmitting power supply, a transmitting control circuit, a transmitting coil and electrodes; and the receiver comprises a receiving coil, electrodes, a received signal regulating circuit, an analog to digital converter (ADC), a receiving power supply and a data processing platform. The magnetoelectric comprehensive detecting instrument underground the coal mine is particularly suitable for detecting a goaf underground the coal mine, a lava development area, a fault, water fill of a crushed zone and other geological hazards; actual resistance rate detected through a symmetrical quadrupole device of a direct current method is used to rectify apparent resistivity of a geologic body, and the precision of a transient electromagnetic method is improved; and direct current method data are used to fill a shallow layer blind area of the transient electromagnetic method, and no blind spots exist in the full blind area.
Description
Technical field
The present invention relates to magnetoelectricity comprehensive survey instrument under a kind of mine geophysical exploration equipment, particularly a kind of coal mine.
Background technology
Electrical method is divided into AC electrical method and DC electrical method two large classes, electrical survey (-ing) is that the conductivity difference of rock (ore deposit) stone in the geologic body is as material base, by the artificial earth current of setting up of observation and research or characteristic distributions and the Changing Pattern of electric field, find out subsurface geological structure and seek underground electric characteristic abnormality body, reconnoitre geophysical method to reach a class of looking for the ore deposit and solving other geological problems (sliding mass, karst and goaf etc.), have the advantages such as cost is low, high efficiency, and reflection ground is electric, geological information is abundant; AC electrical method is the most common with transient electromagnetic method, transient electromagnetic method is to send the transition primary field by transmitting coil to geologic body, the electric field of this rapid decay is responded to the vortex field (secondary field) that makes new advances in geologic body, receiving trap is surveyed the geologic anomaly body by the variation characteristic that receives secondary field.
The transient electromagnetic method major advantage is easy construction, and effect is clear.Major defect has:
1, the Transient Electromagnetic Apparatus under the coal mine usually adopts overlapping loop apparatus, because the decay of secondary field is very fast, adds primary field to the impact of secondary field, so general shallow-layer blind area is the highest even above 30 meters at 0-20 rice;
2, the electrical resistivity range in coal seam is large, and generally between 800-3000(Ω/M), transient electromagnetic method apparent resistivity inverting commonly used has larger error, must proofread and correct by the use experience coefficient.Even the apparent resistivity after proofreading and correct and the actual resistivity of geologic body or variant.
DC electrical method is the most common with high-density electric; High-density electric is to send DC current by the emitting electrode device of squeezing into geologic body to tested geologic body, measures the distribution of Electric field on earth surface by receiving trap, comes existence and the distribution of inverting subsurface anomaly body; The DC electrical method advantage is that the unusual amplitude of geologic body is strong, and the ground of reflection electricity, geological information are reliable, abundant; Major defect is that investigation depth is shallow, and the electric current penetration capacity is poor when particularly running into the shallow-layer high resistant, and the DC electrical method investigation depth is in 50 meters under the general coal mine.
Summary of the invention
The object of the invention is to overcome defects, magnetoelectricity comprehensive survey instrument under a kind of coal mine is provided, magnetoelectricity comprehensive survey instrument is particularly suitable for surveying the geology harm such as coal mine gob, lava development area, tomography, shatter belt water-filling under this coal mine; With the actual resistivity of symmetry four utmost point device to test of DC electrical method, proofread and correct the apparent resistivity of geologic body, improve the precision of transient electromagnetic method; Fill up the shallow-layer blind area of transient electromagnetic method with the DC electrical method data, reach full survey district without blind spot.
The present invention is achieved in that magnetoelectricity comprehensive survey instrument under a kind of coal mine, comprises transmitter and receiver, and transmitter comprises emission power, countdown circuit, transmitting coil, emitting electrode; Receiver comprises receiving coil, receiving electrode, receiving signal reason circuit, ADC, reception power supply and data processing platform (DPP); Transmitting coil and emitting electrode are connected to countdown circuit transient electromagnetic output terminal and dc output end, and emission power is powered to countdown circuit; Countdown circuit transient electromagnetic output terminal produces the bipolarity rect.p., launches exciting field by transmitting coil to geologic body, and the countdown circuit dc output end produces cycle change in polarity direct current, launches dc point power supply field by emitting electrode to geologic body; Receiver comprises receiving coil, receiving electrode, receiving signal reason circuit, ADC, reception power supply and data processing platform (DPP), receiving coil and receiving electrode are connected to receiving signal reason circuit input end, the ADC input end is connected to the signal conditioning circuit output terminal, the ADC output terminal is connected to the data processor platform, receives power supply and manages circuit, ADC and data processing platform (DPP) power supply to receiving signal; Receiving coil receives the electromagnetic field of eddy current that geologic body produces, and receiving electrode receives the geologic body Electric Field Distribution, and delivers to ADC after electromagnetic field and voltage difference amplified by receiving signal reason circuit and do digital-to-analog conversion, then does Inversion Calculation to data processing platform (DPP).
Magnetoelectricity comprehensive survey instrument can be that independently the Receiver And Transmitter association forms under the described coal mine, also can be that Receiver And Transmitter is integrated.
Described emitting electrode can be two also can be a plurality of, emitting electrode is used for emission cycle change in polarity direct current.
The transient electromagnetic field of described transmitting coil emission different frequency.
Described receiving electrode can be two also can be a plurality of, receiving electrode be used for to receive the distribution of Electric field on earth surface.
Described receiving coil is used for receiving the transition secondary field of underground deep.
The comprehensive detection method of magnetoelectricity under a kind of coal mine may further comprise the steps:
A) electrical method comprehensive survey instrument under the mine is switched to DC electrical method, the actual resistivity of appearing with symmetrical four utmost point measurement device geologic bodies;
B) electrical method comprehensive survey instrument switches to DC electrical method under the coal mine, and emitting electrode is surveyed the geologic body Electric field on earth surface to geologic body emission cycle change in polarity direct current with receiving trap, obtains the sampled data of DC electrical method;
C) electrical method comprehensive survey instrument switches to transient electromagnetic method under the coal mine, and transmitting coil is to geologic body emission transition primary field, and receiving coil receives geologic body secondary vortices flow field, obtains the sampled data of transient electromagnetic method electrical method;
D) data of DC electrical method calculate apparent resistivity by the algorithm of DC electrical method, do degree of depth conversion again, calculate the apparent resistivity isoline figure of different depth;
E) data of transient electromagnetic method calculate apparent resistivity by the algorithm of transient electromagnetic method, measure the actual resistivity that geologic body is appeared with symmetry four utmost point devices of DC electrical method again, proofread and correct apparent resistivity with actual resistivity, do again degree of depth conversion, calculate the apparent resistivity isoline figure of different depth;
F) take normalized apparent resistivity as the inverting basic data, after the blind area partial data of transient electromagnetic method picked, the data of transient electromagnetic method and the data of DC electrical method are precisely superposeed by depth location, the lap data are averaged, and it is level and smooth to do 5 secondaries along depth direction, and DC electrical method data and transient electromagnetic method data can be seamlessly transitted;
G) according to plastid landform practically data are carried out topographic correction;
H) carry out interpolation with golden method of interpolation in the gram, inverting becomes complete 2-D data body.
Electrical method comprehensive survey method commonly used is to carry out data acquisition with electric method meter and Transient Electromagnetic Apparatus respectively, respectively the data that gather is carried out inverting, and behind the delineation abnormality district, independent one-tenth figure does contrast and examines.
Magnetoelectricity comprehensive survey instrument possesses DC electrical method and transient electromagnetic method function under the coal mine of the present invention, carry out simultaneously data acquisition by different device, unification is carried out inverting to the data that gather, remedy the defective of transient electromagnetic method with the advantage of DC electrical method, rather than both are made up simply.Have following advantage:
1, can be respectively with different measurement mechanism image data, real-time;
2, can fill with the data of DC electrical method device collection the shallow-layer blind area of transient electromagnetic method, reach full survey district without blind spot;
3, can measure the actual resistivity that geologic body is appeared with symmetry four utmost point devices of DC electrical method, the apparent resistivity of transient electromagnetic method is proofreaied and correct, make the precision of transient electromagnetic method higher.
Description of drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structured flowchart of the transmitter of magnetoelectricity comprehensive survey instrument under the coal mine of the present invention.
Fig. 2 is the structured flowchart of the receiver of magnetoelectricity comprehensive survey instrument under the coal mine of the present invention.
Fig. 3 is the apparent resistivity isoline figure of the different depth that calculates when magnetoelectricity comprehensive survey instrument switches to DC electrical method under the coal mine of the present invention.
Fig. 4 is the apparent resistivity isoline figure of the different depth that calculates when magnetoelectricity comprehensive survey instrument switches to transient electromagnetic method under the coal mine of the present invention.
Fig. 5 is that magnetoelectricity comprehensive survey instrument becomes complete 2-D data body through inverting under the coal mine of the present invention.
Embodiment
Please consulting simultaneously Fig. 1 and Fig. 2, is magnetoelectricity comprehensive survey instrument under a kind of coal mine of the present invention, comprises transmitter and receiver, and transmitter comprises emission power, countdown circuit, transmitting coil, emitting electrode; Receiver comprises receiving coil, receiving electrode, receiving signal reason circuit, ADC, reception power supply and data processing platform (DPP); Transmitting coil and emitting electrode are connected to countdown circuit transient electromagnetic output terminal and dc output end, and emission power is powered to countdown circuit; Countdown circuit transient electromagnetic output terminal produces the bipolarity rect.p., launches exciting field by transmitting coil to geologic body, and the countdown circuit dc output end produces cycle change in polarity direct current, launches dc point power supply field by emitting electrode to geologic body; Receiver comprises receiving coil, receiving electrode, receiving signal reason circuit, ADC, reception power supply and data processing platform (DPP), receiving coil and receiving electrode are connected to receiving signal reason circuit input end, the ADC input end is connected to the signal conditioning circuit output terminal, the ADC output terminal is connected to the data processor platform, receives power supply and manages circuit, ADC and data processing platform (DPP) power supply to receiving signal; Receiving coil receives the electromagnetic field of eddy current that geologic body produces, and receiving electrode receives the geologic body Electric Field Distribution, and delivers to ADC after electromagnetic field and voltage difference amplified by receiving signal reason circuit and do digital-to-analog conversion, then does Inversion Calculation to data processing platform (DPP).
Electrical method comprehensive survey instrument can be that independently the Receiver And Transmitter association forms under the coal mine, also can be that Receiver And Transmitter is integrated.Described emitting electrode can be two also can be a plurality of, emitting electrode is used for emission cycle change in polarity direct current.The transient electromagnetic field of transmitting coil emission different frequency.Receiving electrode can be two also can be a plurality of, be used for to receive the distribution of Electric field on earth surface.Receiving coil receives the transition secondary field of underground deep.Earth's surface current field and deep secondary field data gather simultaneously, and are real-time.
Magnetoelectricity comprehensive survey instrument symmetry four utmost point devices of DC electrical method under the coal mine of the present invention, measure the actual resistivity that geologic body is appeared, apparent resistivity to transient electromagnetic method is proofreaied and correct, make the higher unification of precision of transient electromagnetic method take apparent resistivity as the inverting data, after the data blind area partial data of transient electromagnetic method picked, the data of transient electromagnetic method and the data of DC electrical method are superposeed by the degree of depth, according to plastid landform practically data are carried out topographic correction, carry out interpolation with golden method of interpolation in the gram, go into complete 2-D data body, the existence that the inverting geologic body is unusual and distribution.
The comprehensive detection method of magnetoelectricity under the coal mine of the present invention may further comprise the steps:
A) electrical method comprehensive survey instrument under the mine is switched to DC electrical method, the actual resistivity of appearing with symmetrical four utmost point measurement device geologic bodies;
B) electrical method comprehensive survey instrument switches to DC electrical method under the coal mine, and emitting electrode is surveyed the geologic body Electric field on earth surface to geologic body emission cycle change in polarity direct current with receiving trap, obtains the sampled data of DC electrical method;
C) electrical method comprehensive survey instrument switches to transient electromagnetic method under the coal mine, and transmitting coil is to geologic body emission transition primary field, and receiving coil receives geologic body secondary vortices flow field, obtains the sampled data of transient electromagnetic method electrical method;
D) data of DC electrical method calculate apparent resistivity by the algorithm of DC electrical method, do degree of depth conversion again, calculate the apparent resistivity isoline figure of different depth, such as Fig. 3;
E) data of transient electromagnetic method calculate apparent resistivity by the algorithm of transient electromagnetic method, measure the actual resistivity that geologic body is appeared with symmetry four utmost point devices of DC electrical method again, proofread and correct apparent resistivity with actual resistivity, do again degree of depth conversion, calculate the apparent resistivity isoline figure of different depth, such as Fig. 4;
F) take normalized apparent resistivity as the inverting basic data, after the blind area partial data of transient electromagnetic method picked, the data of transient electromagnetic method and the data of DC electrical method are precisely superposeed by depth location, the lap data are averaged, and it is level and smooth to do 5 secondaries along depth direction, and DC electrical method data and transient electromagnetic method data can be seamlessly transitted;
G) according to plastid landform practically data are carried out topographic correction;
H) carry out interpolation with golden method of interpolation in the gram, inverting becomes complete 2-D data body, such as Fig. 5.
Magnetoelectricity comprehensive survey instrument possesses DC electrical method and transient electromagnetic method function under the coal mine of the present invention, carry out simultaneously data acquisition by different device, unification is carried out inverting to the data that gather, remedy the defective of transient electromagnetic method with the advantage of DC electrical method, thereby can obtain complete 2-D data body, reach full survey district without blind spot, therefore be particularly suitable for surveying the geology harm such as coal mine gob, lava development area, tomography, shatter belt water-filling.
Claims (5)
1. magnetoelectricity comprehensive survey instrument under the coal mine comprises transmitter and receiver, and it is characterized in that: transmitter comprises emission power, countdown circuit, transmitting coil, emitting electrode; Receiver comprises receiving coil, receiving electrode, receiving signal reason circuit, ADC, reception power supply and data processing platform (DPP); Transmitting coil and emitting electrode are connected to countdown circuit transient electromagnetic output terminal and dc output end, and emission power is powered to countdown circuit; Countdown circuit transient electromagnetic output terminal produces the bipolarity rect.p., launches exciting field by transmitting coil to geologic body, and the countdown circuit dc output end produces cycle change in polarity direct current, launches dc point power supply field by emitting electrode to geologic body; Receiver comprises receiving coil, receiving electrode, receiving signal reason circuit, ADC, reception power supply and data processing platform (DPP), receiving coil and receiving electrode are connected to receiving signal reason circuit input end, the ADC input end is connected to the signal conditioning circuit output terminal, the ADC output terminal is connected to the data processor platform, receives power supply and manages circuit, ADC and data processing platform (DPP) power supply to receiving signal; Receiving coil receives the electromagnetic field of eddy current that geologic body produces, and receiving electrode receives the geologic body Electric Field Distribution, and delivers to ADC after electromagnetic field and voltage difference amplified by receiving signal reason circuit and do digital-to-analog conversion, then does Inversion Calculation to data processing platform (DPP).
2. magnetoelectricity comprehensive survey instrument under the coal mine according to claim 1, it is characterized in that: magnetoelectricity comprehensive survey instrument can be that independently the Receiver And Transmitter association forms under the described coal mine, also can be that Receiver And Transmitter is integrated.
3. magnetoelectricity comprehensive survey instrument under the coal mine according to claim 1 is characterized in that: described emitting electrode can be two also can be a plurality of, emitting electrode is used for emission cycle change in polarity direct current.
4. magnetoelectricity comprehensive survey instrument under the coal mine according to claim 1 is characterized in that: described receiving electrode can be two also can be a plurality of, receiving electrode is used for receiving the distribution of Electric field on earth surface.
5. one kind is utilized under the coal mine claimed in claim 1 the comprehensive detection method of magnetoelectricity under the employed coal mine of magnetoelectricity comprehensive survey instrument, may further comprise the steps:
A) electrical method comprehensive survey instrument under the mine is switched to DC electrical method, the actual resistivity of appearing with symmetrical four utmost point measurement device geologic bodies;
B) electrical method comprehensive survey instrument switches to DC electrical method under the coal mine, and emitting electrode is surveyed the geologic body Electric field on earth surface to geologic body emission cycle change in polarity direct current with receiving trap, obtains the sampled data of DC electrical method;
C) electrical method comprehensive survey instrument switches to transient electromagnetic method under the coal mine, and transmitting coil is to geologic body emission transition primary field, and receiving coil receives geologic body secondary vortices flow field, obtains the sampled data of transient electromagnetic method electrical method;
D) data of DC electrical method calculate apparent resistivity by the algorithm of DC electrical method, do degree of depth conversion again, calculate the apparent resistivity isoline figure of different depth;
E) data of transient electromagnetic method calculate apparent resistivity by the algorithm of transient electromagnetic method, measure the actual resistivity that geologic body is appeared with symmetry four utmost point devices of DC electrical method again, proofread and correct apparent resistivity with actual resistivity, do again degree of depth conversion, calculate the apparent resistivity isoline figure of different depth;
F) take normalized apparent resistivity as the inverting basic data, after the blind area partial data of transient electromagnetic method picked, the data of transient electromagnetic method and the data of DC electrical method are precisely superposeed by depth location, the lap data are averaged, and it is level and smooth to do 5 secondaries along depth direction, and DC electrical method data and transient electromagnetic method data can be seamlessly transitted;
G) according to plastid landform practically data are carried out topographic correction;
H) carry out interpolation with golden method of interpolation in the gram, inverting becomes complete 2-D data body.
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| CN103278858A (en) * | 2013-05-10 | 2013-09-04 | 福州华虹智能科技开发有限公司 | Multicomponent transient electromagnetic method in coal mine hole |
| CN103616727A (en) * | 2013-12-20 | 2014-03-05 | 中国矿业大学(北京) | Dynamic orient electric field exciting coal road fully-mechanized excavating advanced detection launching system for mine |
| CN104035137A (en) * | 2014-06-03 | 2014-09-10 | 吉林大学 | Underground full-space transient electromagnetic detecting instrument and detection method |
| CN104133254A (en) * | 2014-08-11 | 2014-11-05 | 福州华虹智能科技股份有限公司 | Electric and seismic comprehensive detection instrument for underground coal mine |
| CN104714254A (en) * | 2015-02-02 | 2015-06-17 | 中国科学院地质与地球物理研究所 | Coal mine water-accumulating gob detection method and device based on transient electromagnetic method |
| CN105929454A (en) * | 2016-05-06 | 2016-09-07 | 中国科学院地球化学研究所 | Exploration method of "Bipolar wave" direct current electric method |
| CN109188530A (en) * | 2018-09-21 | 2019-01-11 | 安徽惠洲地质安全研究院股份有限公司 | More exploration geophysical field signal intelligent electromagnetic launch systems and method |
| CN109387875A (en) * | 2018-10-25 | 2019-02-26 | 河南理工大学 | A kind of landslide is hydrogeological to monitor geophysical method and device |
| CN109613464A (en) * | 2018-12-28 | 2019-04-12 | 中国船舶重工集团公司第七〇九研究所 | A kind of unmanned Underwater Electromagnetic Field simulator and detection system |
| CN110673221A (en) * | 2019-09-18 | 2020-01-10 | 山东大学 | Transient electromagnetic coil carrying mechanism for tunnel and using method |
| CN110700846A (en) * | 2019-11-05 | 2020-01-17 | 北京住总集团有限责任公司 | Shield constructs machine based on geology is surveyed in advance |
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| CN111781651A (en) * | 2020-06-11 | 2020-10-16 | 四川中成煤田物探工程院有限公司 | Karst detection method combining three geophysical prospecting methods and two geological methods |
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| CN113671577A (en) * | 2021-09-07 | 2021-11-19 | 中国地质大学（北京） | Four-dimensional high-density electrical prospecting system and detection method based on cloud platform |
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