CN106970424B - A kind of coal mine hole lane transient electromagnetic is superimposed forward probe device and method - Google Patents
A kind of coal mine hole lane transient electromagnetic is superimposed forward probe device and method Download PDFInfo
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- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
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Abstract
The present invention relates to a kind of transient electromagnetics to be superimposed forward probe device and method, belongs to coal mining technical field of geophysical exploration, and in particular to a kind of coal mine hole lane transient electromagnetic is superimposed forward probe device and method.Probe is placed in drilling by the present invention, far from interference sources such as metal machineries in tunnel, avoid interference effect, make full use of the borehole conditions of coal mine boring head, it is proposed a kind of laneway midline circle transmitting, the received transient electromagnetic forward probe device and method of three-component in drilling, it both can be by mobile to avoid meeting head on to locate the various interference of metal machinery under the premise of not influencing mine side's headwork to front of meeting head on by reception device, the processing of the forward probe data investigation of positions multiple in drilling can be shown again, realize that the forecast of water damage geologic body is lain concealed in the front of meeting head on of extra long distance.
Description
Technical field
The present invention relates to a kind of transient electromagnetic forward probe device and methods, belong to coal mining field, and in particular to one
Kind coal mine hole lane transient electromagnetic is superimposed forward probe device and method.
Background technique
Currently, being continuously increased with coal mining depth, the forward probe of water-bearing structure is to Safety of Coal Mine Production meaning
Great, Mine transient electromagnetic forward probe method has become one of most common detecting water by pilot hole method in underground.Transient electromagnetic method
It is to send electromagnetic field of pulsed or square wave formula to underground using earth-free loop line or grounding electrode, with coil or grounding electrode
The secondary electromagnetic field that the underground vortex that observation is incuded by the pulse electromagnetic field generates, passes through the room and time to the secondary field
Distributional analysis recognizes related geological problem.
Closely there are the metal machineries such as development machine, drilling machine at rear when due to the work of coal mine boring head, to transient electromagnetic
Detection can bring very big metallic object influence and electromagnetic interference, and mine side is needed to move back these machinery, influence the upright often driving of mine
Work；On the other hand, original Mine transient electromagnetic advanced detection technology investigation depth is limited, less meets and is developing now
Speedy drivage demand.And the reception device that present conventional well transient electromagnetic forward probe uses is coincide-loop,
Receive using one and transmitting wire frame specification as coil (generally 2m × 2m), be impossible fill in drilling in (in advance
Bore diameter is generally no greater than 73.5mm), and vertical component signal can only be measured.
To solve such Railway Project, the borehole conditions of coal mine boring head are made full use of, propose a kind of laneway midline circle
Transmitting, drill in three-component received transient electromagnetic forward probe device and method, both can by by reception device to meeting head on
Front is mobile to avoid meeting head on to locate the various interference of metal machinery under the premise of not influencing mine side's headwork, and can will bore
The forward probe data investigation of multiple positions handles display in hole, and it is pre- to realize that water damage geologic body is lain concealed in the front of meeting head on of extra long distance
Report.
Summary of the invention
The main object of the present invention is to solve above-mentioned existing technical problem, provides a kind of transition of coal mine hole lane
Electromagnetism is superimposed forward probe device and method.The device and method is a kind of in coal mine down-hole tunnel coil transmitting, drilling
The received transient electromagnetic forward probe device and method of three-component, in the premise for not needing to move back the metal machinery near meeting head on
Under, the low-resistance abnormality detection function for the front 150m or more that meets head on is provided, the control range for front water damage forward probe of meeting head on is expanded,
It points out water-bearing structure target that may be present, gives target, direction for next step hazard management.
To solve the above problems, the technical solution adopted by the present invention are as follows:
A kind of coal mine hole lane transient electromagnetic is superimposed forward probe device, comprising:
Emit wire frame group, the rectangular small wire frame of underground drill hole orifice position is vertically placed on including multiturn, for emitting wink
Become electromagnetic waveforms；
Transmitter is arranged using multidiameter delay, is connected with transmitting wire frame to carry out high current square-wave transmission；
Three-component receiving transducer is connect with multichannel A/D acquisition device, is excited production by transmitted waveform for receiving geologic body
Raw induction field and sending to data processing equipment is handled.
Wherein: the square wave that transmitter can simultaneously to multiple transmitting wire frame transmitted in parallel same current densities plays Signal averaging
The effect of enhancing.
The wire frame side length is not more than 5m, and the number of turns is not less than 10 circles.
In addition, carrying out the advanced spy of coal mine hole lane transient electromagnetic superposition using described device the present invention also provides a kind of
The method of survey: it is realized by following steps:
(1) when constructing, three-component receiving transducer is sent into drilling by driving means, allows reception in a certain designated depth
Probe is fixed at the same angle；
(2) three-component induction electric is acquired according to the transmitting wire frame outside certain angle spacing rotating hole along a certain plane
Gesture signal simultaneously records emission lines frame angle degree, while being believed using the azimuth, inclination angle, roll angle of inclination measurement device record point position
Breath；
(3) metrical information of each measuring point is recorded respectively to corresponding acquisition channel, is sent into after processing unit with figure
Mode is shown on the display of reception, or is deposited into storage equipment；
(4) repetition measurement or front and rear angles encryption observation can be carried out thinking the position for having exception response according to display figure；
(5) reception device can continue to repeat (2)-(4) step along other planes after designated depth completes a plane survey
Suddenly；
(6) reception device moves receiving transducer depth and specifies to next after designated depth completes all plane surveys
Position repeats (1)-(5) step；
(7) acquisition data are reached into PC machine, using processing interpretation software to the measurement number of each designated depth in PC machine
According to data processing is carried out, the information of anomalous body position in front of the depth is obtained；
(8) Combined Treatment explanation is carried out to the measurement data of multiple designated depths, obtains anomalous body spatial information, formed big
Range combined detection achievement.
Wherein: the inclination measurement device is inclinometer, electronic compass.
Also, a kind of method for obtaining data for handling above-mentioned detection method is also claimed, it is characterised in that: described
Method is virtual wave field waveform inversion method, specific steps are as follows:
(1) three component seismic data of each point observation is synthesized；
(2) according to formula
Transient field data after synthesis is converted into fluctuation field data, h in formulazIt (t) is transient field data, U (τ) is wave field
Data, t are the sampling time, and τ is the virtual wavefield travel time after conversion corresponding with t, K=tnFor the wave shape equalization factor, n is
Arbitrary value in (0,2.5) section；
(3) waveform compression is carried out to the wavefield data after conversion；
(4) apparent resistivity distribution is provided according to transient electromagnetic deterministic algorithm and obtains initial velocity field；
(5) reference wavelet is chosen in survey line waveform diagram；
(6) inverting is carried out to data using full waveform inversion technology；
(7) conversion of sectorial coordinate system is carried out to the virtual wavefield velocity data obtained after inverting；
(8) the inversion result data in each depth are normalized；
(9) the further coordinate playback under a coordinate system by the normalization data of each investigation depth；
(10) gridding, the imaging of drawing isoline figure are carried out to all data after unified coordinate system；
(11) geological anomalous body that may be present is explained according to imaging results.
Technical effect of the invention are as follows:
(1) probe is placed in drilling by the present invention, far from interference sources such as metal machineries in tunnel, avoids interference shadow
It rings；
(2) by the way that reception device is mobile to avoid meeting under the premise of not influencing mine side's headwork to front of meeting head on
The various interference of metal machinery at head, and the processing of the forward probe data investigation of positions multiple in drilling can be shown, it realizes super
The forecast of water damage geologic body is lain concealed in the front of meeting head on of long range.
(3) it provides a kind of virtual wave field waveform inversion method to handle obtained data, can effectively realize three
The analysis of component data.
Detailed description of the invention
Fig. 1 is work and schematic device of the invention；
Fig. 2 is the transmitting wire frame rotation angle degree figure of a certain plane of the invention；
Fig. 3 is different depth point forward probe result superposition processing schematic diagram of the invention；
Fig. 4-1 is that conventional transient electromagnetic visits processing result in advance；
Fig. 4-2 is that received transient electromagnetic visits processing result in advance in hole；
Fig. 5-1 is advanced spy result achievement outside conventional orifices；
Fig. 5-2 is that 20m visits overlapping achievement in advance in outside hole and hole；
Fig. 5-3 is outside hole, 20m in hole, 38m visits overlapping achievement in advance in hole；
Fig. 6-1 is that the three component seismic data of each point observation carries out composite diagram；
Fig. 6-2 be each investigation depth normalization data under a coordinate system further coordinate playback figure；
Fig. 6-3 is the measurement data for having development machine at the aperture of tunnel, and circle point curve is aperture measurement data curve, and dotted line is
Have just enter into curve in drilling, trigonometric curve is curve after a distance in access aperture, cross curve be enter drilling it is very deep after
Curve.
Specific embodiment
Technical solution of the present invention is further elaborated below with reference to embodiment:
Embodiment
Such as Fig. 1, the coal mine hole lane transient electromagnetic device of the present embodiment, including multidiameter delay transmitter, transmitting wire frame,
Three-component receiving transducer, multichannel A/D acquisition device, embedded type CPU and USB2.0 interface.
The emitter of the present embodiment be placed on vertically underground meet head on face leting speeper drilling orifice position multiturn it is rectangular
Small wire frame；Wire frame side length is not more than 5m, and the number of turns is not less than 10 circles；Reception device is that the three-component that can be put into drilling is popped one's head in, three
Component receiving transducer is connect with multichannel A/D acquisition device, by parameter setting, to control high performance embedded CPU and multi-pass
Road A/D acquisition device.
Three-component probe separately detects 1 vertical component and 2 orthogonal horizontal components, and equivalent received area is not less than
500m2；Instrument host is multichannel high current square-wave transmission device, and single channel emission current intensity is not less than 3A, the equivalent transmitting of multichannel
Current strength is not less than 10A；
High performance embedded CPU, by USB2.0 interface, data is exported after handling the data of acquisition.
After adopting the above structure, the measurement method of the present embodiment is as follows:
(1) when constructing, three-component receiving transducer is sent into drilling by driving means, allows reception in a certain designated depth
Device is fixed at the same angle；Specifically, the angle that can be sent into when going with aperture is identical, such as when feeding hole, X
To the positive right side, Y-direction just under, Z-direction just before, be sent into hole, guarantee that probe is so placed every time.Fig. 4-1 is conventional detection outside hole, after
There are development machine and drilling machine in side, and data processed result is abnormal, and Fig. 4-2 is detected in similarity condition lower opening, data smoothing, as a result
Reliably.It can be played under the premise of not moving back tunnel rear metal machinery from can be seen that in the two figures using reception in hole
The effect for reducing its interference, improves data processing Explanation Accuracy.
(2) corresponding three-component sense is acquired according to the transmitting wire frame outside certain angle spacing rotating hole along a certain plane
It answers electromotive force signal and records emission lines frame angle degree, while recording point position using inclination measurement device inclinometer or electronic compass
The information such as azimuth, inclination angle, roll angle, as shown in Figure 2.
(3) metrical information of each measuring point is recorded respectively to corresponding acquisition channel, can be schemed after being sent into processing unit
Shape mode is shown on the display of reception, or is deposited to storage equipment；
(4) repetition measurement or front and rear angles encryption observation can be carried out thinking the position for having exception response according to display figure；It is different
Normal judgement is the common knowledge of those skilled in the art, is the professional skill of industry practitioner, according to experiment curv
The size of amplitude can tentatively judge whether that there may be exceptions.Exception in Fig. 4, Fig. 5 is also to need professional according to special
Industry knowledge and working experience go to judge, selects concern low resistance abnormity area or high resistant exceptions area according to actual detection demand, and can be with
The abnormal area for irising out demand on the diagram is marked.
(5) reception device can continue to repeat step (2)-along other planes after designated depth completes a plane survey
Step (4)；
(6) reception device moves receiving transducer depth and specifies to next after designated depth completes all plane surveys
Position, as shown in figure 3, then repeating step (1)-step (5)；
(7) acquisition data are reached into PC machine, using processing interpretation software to the measurement number of each designated depth in PC machine
According to data processing is carried out, the information of anomalous body position in front of the depth is obtained；
(8) Combined Treatment explanation is carried out to the measurement data of multiple designated depths, obtains anomalous body spatial information, formed big
Range combined detection achievement.
When processing, compared to the transient electromagnetic forward probe in conventional tunnel, when this measuring probe is fixed on a certain depth, need
To synthesize a new direction emission lines frame angle direction with orthogonal three component seismic data according to emission lines frame angle degree
Data for handle calculate (such as Fig. 6-1), and calculate when need to consider current probe where depth, by what is be calculated
Data playback to the crosspoint (such as Fig. 6-2) of depth of probe line and transmitting wire frame normal.Transient electromagnetic data is such as in conventional tunnel
Shown in following figure 6-3: circle point curve is aperture measurement data curve, and dotted line is to have just enter into curve in drilling, and trigonometric curve is to enter
Curve after a distance in hole, cross curve are the curve into drilling after very deep.The present embodiment is anti-using virtual wave field waveform
Method is drilled to handle it.
The present embodiment is to pop one's head in into hole, takes full advantage of the steric requirements met head on, and measure three component seismic data, conventional lane
Transient electromagnetic method only measures 1 vertical component data in road, and handles data in three-component hole, can also be superimposed as
Picture.
Fig. 5-1 is conventional detection, and only more than 60 meters of investigation depth, being superimposed in hole increases to 80 meters and the figure of Fig. 5-2 after data
150 meters of 5-3, the reflection of exceptions area is also more obvious.It can be seen that TA data is overlapped processing in device to hole, can significantly mention really
The investigative range for rising forward probe, accurately reflects geologic anomaly.
Stacking image technology need the advanced result for obtaining multiple advanced treatings be normalized be included into depth it is same
Then coordinate system is unified after carrying out Kriging regression to be imaged.Transient electromagnetic method only measures in aperture in conventional tunnel,
Without other depth datas, the stacking image that is also far from being processing.
Three component seismic data observes the characteristics of being also us, does not have three component seismic data measurement in conventional method.
Virtual wave field waveform inversion method step:
(1) it such as Fig. 6-1, when this measuring probe is fixed on a certain depth, needs according to emission lines frame angle degree, with being mutually perpendicular to
Three component seismic data synthesize the data of new directions an emission lines frame angle direction for handling calculating.
(2) according to formula
Transient field data after synthesis is converted into fluctuation field data, h in formulazIt (t) is transient field data, U (τ) is wave field
Data, t are the sampling time, and τ is the virtual wavefield travel time after conversion corresponding with t, K=tnFor the wave shape equalization factor, n is
Arbitrary value in (0,2.5) section；
(3) waveform compression is carried out to the wavefield data after conversion；
(4) apparent resistivity distribution is provided according to transient electromagnetic deterministic algorithm and obtains initial velocity field；
(5) reference wavelet is chosen in survey line waveform diagram；
(6) inverting is carried out to data using Waveform Matching inversion technique；
(7) conversion of sectorial coordinate system is carried out to the virtual wavefield velocity data obtained after inverting；
(8) the inversion result data in each depth are normalized；
(9) the further coordinate playback under a coordinate system by the normalization data of each investigation depth, needs when calculating
Consider the depth where current probe, the data being calculated are playbacked to depth of probe line and transmitting wire frame normal and are intersected
Point；
(10) gridding, the imaging of drawing isoline figure are carried out to all data after unified coordinate system；
(11) geological anomalous body that may be present is explained according to imaging results.Professional is according to professional knowledge and from already
Judgement is tested, can simply think navy blue is low resistance exceptions area, and wine-colored is high resistance exceptions area, but in real work
Any exceptions area is not necessarily paid close attention to, for example only focuses on low resistance abnormity area, that is possible to only iris out low resistance region on the diagram, no
Mark high resistance region.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (4)
1. a kind of coal mine hole lane transient electromagnetic is superimposed forward probe device characterized by comprising
Emit wire frame, the rectangular small wire frame of underground drill hole orifice position is vertically placed on including multiturn, for emitting transient electromagnetic
Waveform；
Transmitter is arranged using multidiameter delay, is connected with transmitting wire frame to carry out high current square-wave transmission；
Three-component receiving transducer is connect with multichannel A/D acquisition device, for receiving the waveform of transmitting wire frame transmitting and sending to number
It is handled according to processing unit；
Wherein, in data processing, according to emission lines frame angle degree, synthesize a new finger with orthogonal three component seismic data
To the data of emission lines frame angle direction for handle calculate, and calculate when need to consider current probe where depth,
The data being calculated are playbacked to the crosspoint of depth of probe line and transmitting wire frame normal.
2. detection device according to claim 1, which is characterized in that transmitter can simultaneously send out multiple transmitting wire frames parallel
The square wave of same current density is penetrated, the effect of Signal averaging enhancing is played.
3. detection device according to claim 1, which is characterized in that the wire frame side length is not more than 5m, and the number of turns is not less than
10 circles.
4. a kind of method for carrying out coal mine hole lane transient electromagnetic superposition forward probe using claim 1 described device,
It is characterized in that, is realized by following steps:
(1) when constructing, three-component receiving transducer is sent into drilling by driving means, allows receiving transducer in a certain designated depth
It fixes at the same angle；
(2) three-component induced electromotive force letter is acquired according to the transmitting wire frame outside certain angle spacing rotating hole along a certain plane
Number and record emission lines frame angle degree, while utilizing azimuth, the inclination angle, roll angle information of inclination measurement device record point position；
(3) metrical information of each measuring point is recorded respectively to corresponding acquisition channel, is sent into after processing unit to graphically
It is shown on the display of reception, or deposits into storage equipment；
(4) repetition measurement or front and rear angles encryption observation can be carried out thinking the position for having exception response according to display figure；
(5) reception device can continue to repeat (2)-(4) step along other planes after designated depth completes a plane survey；
(6) reception device is after designated depth completes all plane surveys, removable receiving transducer depth to next designated position,
Repeat (1)-(5) step；
(7) acquisition data are reached into PC machine, in PC machine using processing interpretation software to the measurement data of each designated depth into
The processing of row data, obtains the information of anomalous body position in front of the depth；
(8) Combined Treatment explanation is carried out to the measurement data of multiple designated depths, obtains anomalous body spatial information, formed a wide range of
Combined detection achievement.
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