CN105807324B - A kind of metallic ore Mined-Out Areas method - Google Patents
A kind of metallic ore Mined-Out Areas method Download PDFInfo
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Abstract
The present invention is metallic ore Mined-Out Areas method, including：A. selected measuring point in area is being surveyed, is encoding 1~n, b. adjusts the parameter of emitter, and regulation receiver includes the attenuation amplitude for setting reception signal；C. emitter sends the bipolarity rectangular pulse signal that amplitude is V to transmitting coil, transformation in underground by primary field to secondary field, secondary field signal in receiving coil is received by receiver and carries out data record and processing, completes the measurement of single-point univoltage grade；D. on the position of No. 1 point, change emitting voltage, complete the multi-voltage grade measurement of No. 1 point, then said process will be repeated to No. 2 points, complete the multi-voltage grade measurement of No. 2 points, be sequentially completed the multi-voltage grade measurement of 1~n points.E. data processing is carried out, the position of Goaf Area is drawn by finding the exception of contemporaneous data.This method can realize the detection that depth capacity is completed with most short dead time on the premise of data validity is ensured.
Description
Technical field
The invention belongs to field of geophysical exploration, more particularly to a kind of metallic ore Mined-Out Areas method.
Background technology
From the middle and later periods in 20th century so far, China's infrastructure is constantly carried out, and demand to metallic mineral resources and uses one
Fast growth phase directly is in, there are more than 10,000 underground metal mine, annual more than 20 hundred million tons of ores of output in China at present.It is but golden
After belonging to mining mineral resource utilization, because the change of geological conditions forms substantial amounts of goaf, the presence in a large amount of goafs
Make mining worsening condition, the original mechanical balance of subterranean body is broken, and may be subjected to displacement at any time, the accident such as rock burst；
More seriously goaf can be filled by gas, underground water etc., and being constructed before situation is not verified has huge potential safety hazard.
Therefore detection goaf is always the problem that resource exploration field must face.
At this stage, the domestic rare detection method for metal ore goaf, it is traditional usually to continue to use coal mine gob
Transient electromagnetic method.Transient electromagnetic method is based on electromagnetic induction principle, when the emission current in transmitting coil suddenly drops to zero
When, primary field can be induced around coil, vortex current can be produced in the conducting medium of underground in primary field communication process, is vortexed
Electric current can propagate secondary field in change procedure to earth's surface, by being received to secondary field and inverting judges geologic anomaly
Body.In metal mine, because geology body resistivity is low, underground can form several irregular screen layers, it is necessary to using big electricity
Stream design could penetrate signal；While in order to ensure the detection accuracy in goaf, it is necessary to use small coil design.Small coil is big
The design of electric current necessarily causes winding inductance quantity big, and moment shut-off can not be realized but generate one by so allowing for emission current
The section turn-off time, strong transmission signal is mixed into again in originally faint reception signal in this period, can not carry out analysis inverting, claim
For dead time.Dead time is long so that the part reception signal can not be used effectively, and then cause goaf to be failed to report.
Therefore need redesign just to can be applied to metal mine.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of metallic ore Mined-Out Areas method, are ensureing that data have
The detection that depth capacity is completed with most short dead time can be realized on the premise of effect property.
A kind of metallic ore Mined-Out Areas method, it is characterised in that including the steps：
A. selected measuring point in area is being surveyed, is encoding 1~n, laid transmitting coil on the ground centered on No. 1 measuring point and receive line
Circle, the two is laid in a manner of Coincident loop；The emission port of emitter is connected with transmitting coil, the receiving port of receiver
It is connected with receiving coil, is connected between the synchronous port of emitter and the synchronous port of receiver with synchronous signal line；
B. adjusting the parameter of emitter includes：Emitting voltage V is adjusted, the transmitting that different voltage can reach different is deep
Degree；The length of launch time t1 is adjusted, to control the length of transmitted waveform；Delay time t2 length is adjusted, the parameter determines
Synchronizing signal can be sent in the suitable time to receiver by emitter；Adjust acquisition time t4；Regulation receiver includes
Set the attenuation amplitude of reception signal；
C. emitter sends the bipolarity rectangular pulse signal that amplitude is V to transmitting coil, is arrived in underground by primary field
The transformation of secondary field, the secondary field signal in receiving coil is received by receiver and carries out data record and processing, completed single
The measurement of point univoltage grade；
D. on the position of No. 1 point, change emitting voltage, repeat above-mentioned b-c process, complete the multivoltage etc. of No. 1 point
Level measurement, then said process will be repeated to No. 2 points, the multi-voltage grade measurement of No. 2 points is completed, is sequentially completed the more of 1~n points
Voltage class measures.
E. the data collected include the time and electric current is depicted as function curve, and carrying out data processing includes：1. by No. 1 point
Some groups of data divide different periods to be intercepted, different voltage is represented with V1, V2 ... Vn, V1 voltage class interception T1
Section time data, V2 voltage class interception T2 section time datas, intercepts Tn section time datas, after interception to Vn voltage class
Each segment data is normalized, and is fitted to a smoothed curve L1；2. the Data duplication above-mentioned steps of No. 2 points, are fitted to
One smoothed curve L2, likewise, being sequentially completed curve L1~Ln fitting；3. curve L1~Ln is carried out instead in inversion workbench
Drill, the position of Goaf Area is drawn by finding the exception of contemporaneous data.
Further, used emitter includes：
MCU, it is control core；
Band switch group, it is connected to carry out parameter setting with the MCU；
Storage capacitor, by DC-DC booster circuit to storage capacitor after being connected between MCU by DC-DC booster circuit
Charge to the magnitude of voltage of setting；
Voltage collection circuit, it is connected between MCU and storage capacitor, gathers the magnitude of voltage of storage capacitor and be transferred to MCU；
IGBT bridges, it is connected with the storage capacitor, and break-make makes energy storage under MCU control by IGBT drive circuit
Electric capacity launches alternation bipolarity rectangular pulse to transmitting coil.
Further, used receiver includes：
Attenuator circuit, it is connected with receiving coil, the signal that receiving coil receives is adjusted according to attenuation multiple；
Band switch, the attenuation amplitude of setting reception signal is connected with the attenuator circuit；
PC, passes sequentially through AD Acquisition Circuit and modulate circuit is connected with attenuator circuit, the conditioned circuit regulation of signal
Afterwards, PC is transferred to by the conversion of AD Acquisition Circuit, receiver/transmitter is sent synchronous after the PC connects with emitter
Signal, and data are handled.
Further, the methods of passing through mesh generation in step a) is surveying selected measuring point in area.
Further, band switch group works as time relevant parameter of measurement, including emitting voltage V, launch time to MCU settings
T1, delay time t2 and acquisition time t4.
Further, if storage capacitor current voltage is more than or equal in MCU the voltage set, charging is stopped, together
When MCU by control the break-make of IGBT bridges realize storage capacitor to transmitting coil launch bipolarity rectangular pulse.
Further, MCU SECO flow is as follows：
Detect current storage capacitor voltage；
If storage capacitor voltage is less than setting value, charging signals are sent to DC-DC booster powers；
If storage capacitor voltage is more than or equal to setting value, stops charging and control IGBT bridges to launch forward current arteries and veins
Rush, stop transmitting after duration t1, then send synchronizing signal to receiver after stand-by period t2, synchronizing signal duration t3 is
Fixed value, current storage capacitor voltage is detected after stand-by period t4；
If setting value is less than charging signals are sent to DC-DC booster circuit；
If more than or equal to stopping charging if setting value, the charging interval, duration t5 was not fixed；
Control IGBT bridges transmitting reverse current pulses；
Said process is repeated until measurement terminates.
The present invention is achieved in that
Compared with prior art, beneficial effect is the present invention：The inventive method is established on the basis of electromagnetic induction principle
On, taken multiple measurements by launching different voltage class pulses, the data collected are subjected to segmentation interception, normalized
Carry out back analysis again afterwards, this method can be realized on the premise of data validity is ensured with most short dead time completion
The detection of depth capacity.
By controlling the discharge and recharge of storage capacitor, the transmitting of high-power signal under field condition is realized；Opened by wave band
Pass group is simple to operate to set various measurement parameters to cause, improves the reliability of instrument under field condition；This method can be
The high-power transmitting of small coil is realized under field condition, investigation depth is big, precision is high, highly reliable.This method can be realized to metal
Ore goaf is effectively detected, and then is provided safeguard for mining area safety production.
Brief description of the drawings
Fig. 1 is the modular structure block diagram of equipment provided in an embodiment of the present invention；
Fig. 2 is MCU work schedules schematic diagram provided in an embodiment of the present invention；
Fig. 3 is multimetering schematic flow sheet provided in an embodiment of the present invention；
Fig. 4 is data cutout provided in an embodiment of the present invention and splicing schematic diagram.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
As shown in figure 1, what the present invention was realized in：A kind of metallic ore Mined-Out Areas method, the detection device of use
Including emitter 10, receiver 17, transmitting coil 6 and receiving coil 7.Emitter 10 includes band switch group 1, MCU2, DC-DC
Booster circuit 3, storage capacitor 4, IGBT bridges 5, IGBT drive circuit 9 and voltage collection circuit 8；Band switch group 1 with
MCU2, which is connected, carries out parameter setting, and MCU2 is connected with IGBT drive circuit 9, and IGBT drive circuit 9 is connected to IGBT bridges 5 and controlled
Its break-make is made, MCU2 is connected with DC-DC booster circuit 3, and DC-DC booster circuit 3 is connected to storage capacitor 4 and it is charged, energy storage
Electric capacity 4 is connected by voltage collection circuit 8 with MCU2, while storage capacitor 4 is connected with IGBT bridges 5, IGBT bridges 5 it is defeated
Go out end with transmitting coil 6 to be connected.
Receiver 17 includes attenuator circuit 12, modulate circuit 13, AD Acquisition Circuit 14, flat board PC 16 and band switch
11；Receiving coil 7 is connected with attenuator circuit 12, and the output end of attenuator circuit 12 is connected with modulate circuit 13, while electricity of decaying
Road 12 is connected with band switch 11, receives the instruction of its attenuation multiple, and the output end of modulate circuit 13 is connected with AD Acquisition Circuit 14,
The output end of AD Acquisition Circuit 14 is connected to flat board PC 16 by serial ports 15 and carries out data processing, flat board PC 16 and emitter
10 MCU2 connections are used for receiving its synchronizing signal sent.
Specific work process comprises the following steps：
1) the band switch group 1 for adjusting emitter 10 sets the relevant parameter of this measurement, including emitting voltage to MCU2
V, launch time t1, delay time t2 and acquisition time t4 etc.；Band switch 11 on regulation receiver 17 receives letter to set
Number attenuation amplitude；
2) MCU2 controls DC-DC booster circuit 3 to charge storage capacitor 4, while voltage collection circuit 8 constantly detects energy storage
The voltage V1 of electric capacity 4, and it is fed back to MCU2.If the voltage of setting 1) current voltage is less than in, i.e.,：V1 ＜ V, then continue
Charging；
If 3) voltage of setting during 1) current voltage is more than or equal to, i.e.,：V1 >=V, then stop charging, while MCU2 leads to
Control IGBT drive circuit 9 is crossed to control the break-make of IGBT bridges 5, IGBT bridges 5 are located at storage capacitor 4 as switching-type device
Between transmitting coil 6, MCU2 is by controlling the break-make of IGBT bridges 5 to make storage capacitor 4 bipolar to the transmitting alternation of transmitting coil 6
Property rectangular pulse, amplitude size is V, transmitting coil 6 to underground launch primary field, primary field pass through search coverage geologic body,
Electric current can be produced, secondary field will be produced when electric current changes again, now MCU2 sends synchronizing signal to receiver 17；
4) secondary field signal is delivered to receiver 17 after being captured by receiving coil 7, can pass through a series of processing herein,
Including being set by signal attenuation circuit 12, modulate circuit 13, AD Acquisition Circuit 14 according in step 1), finally by serial ports
Data are passed to flat board PC 16 by 15, and flat board PC 16 starts to serial ports after receiving the synchronizing signal that MCU2 in step 3) is sent
15 data transmitted are recorded, and so far complete the single voltage class measurement of single measurement point；
As shown in Fig. 2 MCU2 is core in this device, accurate to control modules to cooperate, MUC2 SECO streams
Journey is as follows：Capacitance present voltage V1 is detected, if V1 ＜ V, charging signals is sent to DC-DC booster circuit 3, if V1 >=V, stops
Only charge and control IGBT bridges 5 to launch forward current pulse, stop transmitting after duration t1, then stand-by period t2 connects backward
The tablet PC 16 of receipts machine 17 sends synchronizing signal, stops transmitting after duration t3, then after stand-by period t4, detects capacitance present
Voltage V1, if V1 ＜ V, start to send charging signals to DC-DC booster circuits 3, until detecting V1 >=V, then stop charging simultaneously
Control IGBT bridges 5 to launch reverse current pulses, repeat said process until detection terminates.
Metallic ore Mined-Out Areas method, including following order and step are carried out by above-mentioned device：
A. the methods of passing through mesh generation is surveying selected measuring point in area, encodes 1~n.Spread on the ground centered on No. 1 measuring point
If transmitting coil 6 and receiving coil 7, the two is laid in a manner of Coincident loop.By the emission port of emitter 10 and transmitting coil 6
It is connected, the receiving port of receiver 17 is connected with receiving coil 7, the synchronous port end synchronous with receiver of emitter 10
It is connected between mouthful with synchronous signal line.
B. the band switch group 1 on emitter 10 is adjusted to suitable gear respectively：(1) regulation emitting voltage V is different
Voltage can reach different emission depths；(2) length of launch time t1 is adjusted, to control the length of transmitted waveform (3) to adjust
Delay time t2 length is saved, the parameter decides that MCU2 can send synchronizing signal in the suitable time to tablet PC 16；
(4) acquisition time t4 is adjusted, different depth needs corresponding acquisition time to ensure the accurate of data；Adjust on receiver 17
Band switch 11 sets the attenuation amplitude of reception signal, in order to avoid signal amplitude excessive damage instrument.
C. switch on power, instrument is started working.Specific work process as described above, emitter are sent to transmitting coil
Amplitude is V bipolarity rectangular pulse signal, and reception is received by receiver to the transformation of secondary field by primary field in underground
Secondary field signal in coil simultaneously carries out data record and processing, so far completes the measurement of single-point univoltage grade, closes instrument.
During this period and instrument need not be operated.
D. as shown in figure 3, on the position of No. 1 point, the emitting voltage and other specification of band switch group are changed, in repetition
Process is stated, completes the multi-voltage grade measurement of No. 1 point.Instrument and coil are put into No. 2 points again and repeat said process, completes No. 2
The multi-voltage grade measurement of point.Likewise, the multi-voltage grade measurement of 1~n points is completed altogether.
E. as shown in figure 4, the data collected are presented in the form of function curve, when tn represents the dead band under Vn voltage class
Between, Tn represents the sample time under Vn voltage class, and voltage class is higher, and dead time tn is longer.After taking each group of data
Data processing is carried out by the data processing platform (DPP) of tablet PC：1. some groups of data minute different periods of No. 1 point are intercepted, V1
Voltage class intercepts T1 segment datas, V2 voltage class interception T2 segment data ... Vn voltage class interception Tn segment datas.It will cut again
Each segment data after taking is normalized, and is fitted to a smoothed curve L1.2. the Data duplication above-mentioned steps of No. 2 points,
A smoothed curve L2 is fitted to, likewise, being sequentially completed curve L1~Ln fitting.3. by curve L1~Ln in inversion workbench
Inverting is carried out, the position of Goaf Area is drawn by finding the exception of contemporaneous data.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (7)
- A kind of 1. metallic ore Mined-Out Areas method, it is characterised in that including the steps：A. selected measuring point in area is being surveyed, is encoding 1~n, transmitting coil and receiving coil are laid on the ground centered on No. 1 measuring point, The two is laid in a manner of Coincident loop；The emission port of emitter is connected with transmitting coil, the receiving port of receiver with Receiving coil is connected, and is connected between the synchronous port of emitter and the synchronous port of receiver with synchronous signal line；B. adjusting the parameter of emitter includes：Emitting voltage V, V=V1, V2 ... Vn is adjusted, different voltage can reach not Same emission depth；The length of launch time t1 is adjusted, to control the length of transmitted waveform；Delay time t2 length is adjusted, The parameter decides that emitter can send synchronizing signal in the suitable time to receiver；Adjust acquisition time t4；Regulation Receiver includes the attenuation amplitude of setting reception signal；C. emitter sends the bipolarity rectangular pulse signal that amplitude is V to transmitting coil, in underground by primary field to secondary The transformation of field, receives the secondary field signal in receiving coil by receiver and carries out data record and processing, completes single-point list The measurement of voltage class；D. on the position of No. 1 point, change emitting voltage, repeat above-mentioned b-c process, the multi-voltage grade for completing No. 1 point is surveyed Amount, then said process will be repeated to No. 2 points, the multi-voltage grade measurement of No. 2 points is completed, is sequentially completed the multivoltage of 1~n points Level measurement；E. the data collected include the time and electric current is depicted as function curve, and carrying out data processing includes：If 1. by No. 1 point Dry group data divide different periods to be intercepted, and different voltage is represented with V1, V2 ... Vn, when V1 voltage class intercepts T1 sections Between data, V2 voltage class interception T2 section time datas, to Vn voltage class intercept Tn section time datas, wherein T1 represent V1 electricity Press the sample time under grade, T2 shows the sample time under V2 voltage class, and Tn represents the sample time under Vn voltage class, will Each segment data after interception is normalized, and is fitted to a smoothed curve L1；2. the above-mentioned step of the Data duplication of No. 2 points Suddenly, a smoothed curve L2 is fitted to, likewise, being sequentially completed curve L1~Ln fitting；3. by curve L1~Ln in inverting Platform carries out inverting, and the position of Goaf Area is drawn by finding the exception of contemporaneous data.
- 2. according to the metallic ore Mined-Out Areas method described in claim 1, it is characterised in that used emitter includes：MCU, it is control core；Band switch group, it is connected to carry out parameter setting with the MCU；Storage capacitor, storage capacitor is charged by DC-DC booster circuit after being connected between MCU by DC-DC booster circuit To the magnitude of voltage of setting；Voltage collection circuit, it is connected between MCU and storage capacitor, gathers the magnitude of voltage of storage capacitor and be transferred to MCU；IGBT bridges, it is connected with the storage capacitor, and break-make makes storage capacitor under MCU control by IGBT drive circuit Launch alternation bipolarity rectangular pulse to transmitting coil.
- 3. according to the metallic ore Mined-Out Areas method described in claim 1, it is characterised in that used receiver includes：Attenuator circuit, it is connected with receiving coil, the signal that receiving coil receives is adjusted according to attenuation multiple；Band switch, the attenuation amplitude of setting reception signal is connected with the attenuator circuit；PC, passes sequentially through AD Acquisition Circuit and modulate circuit is connected with attenuator circuit, after the conditioned circuit regulation of signal, leads to The conversion for crossing AD Acquisition Circuit is transferred to PC, the synchronizing signal that receiver/transmitter is sent after the PC is connected with emitter, And data are handled.
- 4. according to the metallic ore Mined-Out Areas method described in claim 1, it is characterised in that pass through mesh generation in step a) The methods of survey area in select measuring point.
- 5. according to the metallic ore Mined-Out Areas method described in claim 2, it is characterised in that band switch group is set to MCU When the relevant parameter of secondary measurement, including emitting voltage V, launch time t1, delay time t2 and acquisition time t4.
- 6. according to the metallic ore Mined-Out Areas method described in claim 2, it is characterised in that if storage capacitor current voltage More than or equal to the voltage set in MCU, then stop charging, while MCU realizes energy storage by controlling the break-make of IGBT bridges Electric capacity launches bipolarity rectangular pulse to transmitting coil.
- 7. according to the metallic ore Mined-Out Areas method described in claim 2, it is characterised in that MCU SECO flow is such as Under：Detect current storage capacitor voltage；If storage capacitor voltage is less than setting value, charging signals are sent to DC-DC booster powers；If storage capacitor voltage is more than or equal to setting value, stops charging and control IGBT bridges to launch forward current pulse, hold Stop transmitting after continuous time t1, then send synchronizing signal to receiver after stand-by period t2, synchronizing signal duration t3 is fixation It is worth, current storage capacitor voltage is detected after stand-by period t4；If setting value is less than charging signals are sent to DC-DC booster circuit；If more than or equal to stopping charging if setting value, the charging interval, duration t5 was not fixed；Control IGBT bridges transmitting reverse current pulses；Said process is repeated until measurement terminates.
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| WO2014077721A1 (en) * | 2012-11-15 | 2014-05-22 | Baker Hughes Incorporated | Apparatus and method for downhole transient resistivity measurement and inversion |
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