CN106970424A - A kind of coal mine hole lane transient electromagnetic superposition forward probe device and method - Google Patents

Abstract

Forward probe device and method is superimposed the present invention relates to a kind of transient electromagnetic, 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, away from interference sources such as the metal machineries in tunnel, avoid interference effect, make full use of the borehole conditions of colliery boring head, propose a kind of laneway midline circle transmitting, the transient electromagnetic forward probe device and method that three-component is received in drilling, both can be by mobile so as to avoid the various interference for meeting head on to locate metal machinery on the premise of ore deposit side's headwork is not influenceed to front of meeting head on by reception device, the forward probe data investigation of multiple positions in drilling can be handled and shown again, realize the latent water damage geologic body forecast in front of meeting head on of extra long distance.

Description

A kind of coal mine hole lane transient electromagnetic superposition forward probe device and method

Technical field

The present invention relates to a kind of transient electromagnetic forward probe device and method, belong to coal mining field, and in particular to one Plant coal mine hole lane transient electromagnetic superposition forward probe device and method.

Background technology

At present, 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 turned into one of the most frequently used detecting water by pilot hole method in underground.Transient electromagnetic method It is to underground transmission electromagnetic field of pulsed or square wave formula, with coil or grounding electrode using earth-free loop line or grounding electrode Observe the underground sensed by the pulse electromagnetic field and be vortexed the secondary electromagnetic field produced, pass through the room and time to the secondary field Distributional analysis recognizes relevant geological problem.

When being worked due to colliery boring head closely there is the metal machineries such as development machine, rig in rear, to transient electromagnetic Detection can bring very big metallic object influence and electromagnetic interference, it is necessary to ore deposit side will be moved after these machineries, the upright often driving of influence ore deposit Work；On the other hand, original Mine transient electromagnetic advanced detection technology investigation depth is limited, has less met and has developed now Speedy drivage demand.And the reception device that present conventional well transient electromagnetic forward probe is used is coincide-loop, Receive the coil (generally 2m × 2m) using one and as transmitting wire frame specification, be impossible fill in drilling (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 colliery boring head are made full use of, a kind of laneway midline circle is proposed The transient electromagnetic forward probe device and method that three-component is received in transmitting, drilling, both can by by reception device to meeting head on Front movement will can be bored again so as to avoid the various interference for meeting head on to locate metal machinery on the premise of ore deposit side's headwork is not influenceed The forward probe data investigation processing display of multiple positions in hole, realizes that the latent water damage geologic body in front of meeting head on of extra long distance is pre- Report.

The content of the invention

The main object of the present invention is that there is provided a kind of transition of coal mine hole lane for the above-mentioned existing technical problem of solution 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 transient electromagnetic forward probe device and method that three-component is received, moves the premise of the metal machinery near meeting head on after not needing Under there is provided meet head on front more than 150m low-resistance abnormality detection function, expand meet head on front water damage forward probe control range, Water-bearing structure target that may be present is pointed out, is that next step hazard management gives target, direction.

To solve the above problems, the technical solution adopted by the present invention is：

A kind of coal mine hole lane transient electromagnetic superposition forward probe device, including：

Launch wire frame group, including multiturn is vertically placed on the square small wire frame of underground drill hole orifice position, for launching wink Become electromagnetic waveforms；

Emitter, is set using multidiameter delay, is connected with transmitting wire frame to carry out high current square-wave transmission；

Three-component receiving transducer, is connected with multichannel A/D harvesters, and production is excited for receiving geologic body by transmitted waveform Raw induction field is simultaneously delivered to data processing equipment and handled.

Wherein：Emitter can play Signal averaging simultaneously to multiple square waves for launching wire frame transmitted in parallel same current densities Enhanced effect.

The wire frame length of side is not more than 5m, and the number of turn is not less than 10 circles.

In addition, being visited present invention also offers a kind of using the transient electromagnetic superposition of described device progress coal mine hole lane is advanced The method of survey：Realized by following steps：

(1) when constructing, by pusher by the feeding drilling of three-component receiving transducer, reception is allowed in a certain designated depth Probe is fixed at the same angle；

(2) along a certain plane according to the transmitting wire frame outside certain angle spacing rotating hole, three-component induction electric is gathered Gesture signal simultaneously records emission lines frame angle degree, while the azimuth, inclination angle, roll angle that record point position using inclination measurement device are believed Breath；

(3) metrical information of each measuring point is recorded to corresponding acquisition channel respectively, sent into after processing unit with figure Mode is shown on the display of reception, or is deposited into storage device；

(4) repetition measurement can be carried out in the position for thinking to have exception response according to display figure or front and rear angles encryption is observed；

(5) reception device can continue to repeat (2)-(4) step along other planes after designated depth completes a plane survey Suddenly；

(6) reception device may move receiving transducer depth and specified to next after designated depth completes all plane surveys Position, repeats (1)-(5) step；

(7) gathered data is reached into PC, measurement number of the processing interpretation software to each designated depth is used on PC According to data processing is carried out, the information of anomalous body position in front of the depth is drawn；

(8) measurement data to multiple designated depths carries out Combined Treatment explanation, obtains anomalous body spatial information, forms big Scope combined detection achievement.

Wherein：The inclination measurement device is inclinometer, electronic compass.

Also, it is also claimed a kind of for handling the method that above-mentioned detection method obtains data, it is characterised in that：It is described Method is virtual wave field waveform inversion method, is concretely comprised the following steps：

(1) three component seismic data that each point is observed is synthesized；

(2) according to formula

Transient field data after synthesis is converted into h in fluctuation field data, formula_z(t) it is transient field data, U (τ) is wave field Data, t is 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 (0,2.5) arbitrary value in interval；

(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 draws initial velocity field；

(5) reference wavelet is chosen in survey line oscillogram；

(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) by the normalization data of each investigation depth, further coordinate playbacks under a coordinate system；

(10) all data after unified coordinate system are carried out with gridding, the imaging of drawing isoline figure；

(11) geological anomalous body that may be present is explained according to imaging results.

The present invention technique effect be：

(1) probe is placed in drilling by the present invention, away from interference sources such as the metal machineries in tunnel, avoids interference shadow Ring；

(2) by the way that reception device is mobile so as to avoid meeting on the premise of ore deposit side's headwork is not influenceed to front of meeting head on The various interference of metal machinery at head, the forward probe data investigation of multiple positions in drilling can be handled and shown, realize super again The latent water damage geologic body forecast in front of meeting head on of long range.

(3) obtained data are handled there is provided a kind of virtual wave field waveform inversion method, can effectively realizes three The analysis of component data.

Brief description of the drawings

Work and schematic device of the Fig. 1 for the present invention；

Fig. 2 is the transmitting wire frame anglec of rotation figure of a certain plane of the present invention；

Fig. 3 is different depth point forward probe result overlap-add procedure schematic diagram of the invention；

Fig. 4-1 is that conventional transient electromagnetic visits result in advance；

Fig. 4-2 is that the transient electromagnetic received in hole visits result in advance；

Fig. 5-1 is advanced spy result achievement outside conventional orifices；

Fig. 5-2 be outside hole and hole in 20m visit overlapping achievement in advance；

Fig. 5-3 is 20m outside hole, 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 segment distance in access aperture, cross curve be enter drilling it is very deep after Curve.

Embodiment

Technical scheme is further elaborated with reference to embodiment：

Embodiment

Such as Fig. 1, the coal mine hole lane transient electromagnetic device of the present embodiment, including multidiameter delay emitter, transmitting wire frame, Three-component receiving transducer, multichannel A/D harvesters, embedded type CPU and USB2.0 interfaces.

The emitter of the present embodiment be placed on vertically underground meet head on face leting speeper drilling orifice position multiturn it is square Small wire frame；The wire frame length of side is not more than 5m, and the number of turn is not less than 10 circles；Reception device is the three-component probe that can be put into drilling, three Component receiving transducer is connected with multichannel A/D harvesters, by parameter setting, to control high performance embedded CPU with leading to more Road A/D harvesters.

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 interfaces, data is exported after handling the data of collection.

After said structure, the metering system of the present embodiment is as follows：

(1) when constructing, by pusher by the feeding drilling of three-component receiving transducer, reception is allowed in a certain designated depth Device is fixed at the same angle；Specifically, the angle that can be sent into aperture when going is identical, such as when being sent into hole, X To the positive right side, Y-direction just under, Z-direction just before, be sent into hole in, every time ensure probe so place.Fig. 4-1 is conventional detection outside hole, after There are development machine and rig 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 from the two it can be seen from the figure thats using reception in hole on the premise of tunnel rear metal machinery is not moved afterwards Reduce the effect of its interference, improve data processing Explanation Accuracy.

(2) along a certain plane according to the transmitting wire frame outside certain angle spacing rotating hole, corresponding three-component sense is gathered Answer electromotive force signal and record 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 to corresponding acquisition channel respectively, can schemed after sending into processing unit Shape mode is shown on the display of reception, or is deposited to storage device；

(4) repetition measurement can be carried out in the position for thinking to have exception response according to display figure or front and rear angles encryption is observed；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 to there may be exception.Exception in Fig. 4, Fig. 5 is also to need professional according to special Industry knowledge and working experience go to judge, according to actual detection demand selection concern low resistance abnormity area or high resistant exceptions area, it is possible to The abnormal area for irising out demand on the diagram is marked.

(5) reception device designated depth complete a plane survey after, can continue along other plane repeat steps (2)- Step (4)；

(6) reception device may move receiving transducer depth and specified to next after designated depth completes all plane surveys Position, as shown in figure 3, then repeat step (1)-step (5)；

(7) gathered data is reached into PC, measurement number of the processing interpretation software to each designated depth is used on PC According to data processing is carried out, the information of anomalous body position in front of the depth is drawn；

(8) measurement data to multiple designated depths carries out Combined Treatment explanation, obtains anomalous body spatial information, forms big Scope combined detection achievement.

During processing, compared to the transient electromagnetic forward probe in conventional tunnel, when this measuring probe is fixed on a certain depth, need One sensing emission lines frame angle direction newly is synthesized with orthogonal three component seismic data according to emission lines frame angle degree Data, which are used to handle, calculates (such as Fig. 6-1), and needs the depth where consideration current probe when calculating, and will calculate what is obtained 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 figure below 6-3：Circle point curve is aperture measurement data curve, and dotted line is has just enter into curve in drilling, and trigonometric curve is entrance Curve after Kong Zhongyi segment distances, cross curve be enter drilling it is very deep after curve.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 data in three-component hole are handled, and can also be superimposed as Picture.

Fig. 5-1 is conventional detection, and investigation depth increases to Fig. 5-2 80 meters and figure only more than 60 meter after data in superposition hole 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 it carry really The investigative range of forward probe is risen, geologic anomaly is accurately reflected.

Stacking image technology need the advanced result that multiple advanced treatings are obtained being normalized be included into depth it is same Coordinate system, then unifies be imaged after Kriging regression.Transient electromagnetic method is only measured in aperture in conventional tunnel, Without other depth datas, the stacking image that is also far from being processing.

There is no three component seismic data measurement in the characteristics of three component seismic data observation is also for we, conventional method.

Virtual wave field waveform inversion method step：

(1) such as Fig. 6-1, it is necessary to according to emission lines frame angle degree when this measuring probe is fixed on a certain depth, with being mutually perpendicular to Three component seismic data synthesize the data of new sensings an emission lines frame angle direction and be used to handle calculating.

(2) according to formula

Transient field data after synthesis is converted into h in fluctuation field data, formula_z(t) it is transient field data, U (τ) is wave field Data, t is 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 (0,2.5) arbitrary value in interval；

(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 draws initial velocity field；

(5) reference wavelet is chosen in survey line oscillogram；

(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) by the normalization data of each investigation depth, further coordinate playbacks under a coordinate system, specific such as Fig. 6-3 Shown, the depth where needing to consider current probe when calculating, the data that calculating is obtained playback to depth of probe line and hair The crosspoint of ray frame normal；

(10) all data after unified coordinate system are carried out with gridding, the imaging of drawing isoline figure；

(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, it is low resistance exceptions area that can simply think navy blue, and wine-colored is high resistance exceptions area, but in real work Any exceptions area is not necessarily paid close attention to, such as 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 preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic. Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's Within protection domain.

Claims (6)

1. a kind of coal mine hole lane transient electromagnetic is superimposed forward probe device, it is characterised in that including：

Launch wire frame group, including multiturn is vertically placed on the square small wire frame of underground drill hole orifice position, for launching transient electrical Magnetic wave shape；

Emitter, is set using multidiameter delay, is connected with transmitting wire frame to carry out high current square-wave transmission；

Three-component receiving transducer, is connected with multichannel A/D harvesters, for receiving the waveform of transmitting wire frame group transmitting and delivering to Data processing equipment is handled.

2. according to the detection device in claim 1, it is characterised in that emitter can be simultaneously to multiple transmitting wire frame transmitted in parallel The square wave of same current density, plays the enhanced effect of Signal averaging.

3. according to the detection device in claim 1, it is characterised in that the wire frame length of side is not more than 5m, the number of turn is not less than 10 Circle.

4. a kind of carry out the method that coal mine hole lane transient electromagnetic is superimposed forward probe using claim 1 described device, its It is characterised by, is realized by following steps：

(1) when constructing, by pusher by the feeding drilling of three-component receiving transducer, receiving transducer is allowed in a certain designated depth Fix at the same angle；

(2) along a certain plane according to the transmitting wire frame outside certain angle spacing rotating hole, collection three-component induced electromotive force letter Number and record emission lines frame angle degree, while utilizing the azimuth of inclination measurement device record point position, inclination angle, roll angle information；

(3) metrical information of each measuring point is recorded to corresponding acquisition channel respectively, sent into after processing unit to graphically It is shown on the display of reception, or deposits into storage device；

(4) repetition measurement can be carried out in the position for thinking to have exception response according to display figure or front and rear angles encryption is observed；

(5) reception device can continue to repeat (2)-(4) step along other planes after designated depth completes a plane survey；

(6) reception device may move receiving transducer depth to next specified location after designated depth completes all plane surveys, Repeat (1)-(5) step；

(7) gathered data is reached into PC, the measurement data of each designated depth entered using processing interpretation software on PC The processing of row data, draws the information of anomalous body position in front of the depth；

(8) measurement data to multiple designated depths carries out Combined Treatment explanation, obtains anomalous body spatial information, forms a wide range of Combined detection achievement.

5. the method detected according to claim 4, it is characterised in that the inclination measurement device is inclinometer, electronic compass.

6. it is a kind of be used to handling the claims 4 described in the detection method method that obtains data, it is characterised in that methods described For virtual wave field waveform inversion method, concretely comprise the following steps：

(1) three component seismic data that each point is observed is synthesized；

(2) according to formula

$h_z\left(t\right)=\frac{K}{2\sqrt{{\mathrm{\πt}}^3}}{\∫}_0^{\mathrm{\∞}}{\mathrm{\τe}}^{-{\mathrm{\τ}}^2/4t}U\left(\mathrm{\τ}\right)d\mathrm{\τ}$

Transient field data after synthesis is converted into h in fluctuation field data, formula_z(t) it is transient field data, U (τ) is fluctuation field data, T is the sampling time, and τ is the virtual wavefield travel time after conversion corresponding with t, K=tⁿFor the wave shape equalization factor, n for (0, 2.5) arbitrary value in interval；

(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 draws initial velocity field；

(5) reference wavelet is chosen in survey line oscillogram；

(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) by the normalization data of each investigation depth, further coordinate playbacks under a coordinate system；

(10) all data after unified coordinate system are carried out with gridding, the imaging of drawing isoline figure；

(11) geological anomalous body that may be present is explained according to imaging results.