CN105807324A - Method for detecting worked-out section of metal mine - Google Patents
Method for detecting worked-out section of metal mine Download PDFInfo
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- CN105807324A CN105807324A CN201610236151.6A CN201610236151A CN105807324A CN 105807324 A CN105807324 A CN 105807324A CN 201610236151 A CN201610236151 A CN 201610236151A CN 105807324 A CN105807324 A CN 105807324A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title abstract description 5
- 229910052751 metal Inorganic materials 0.000 title abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 239000003990 capacitor Substances 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000002085 persistent effect Effects 0.000 claims description 4
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 230000001143 conditioned effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 3
- 230000005856 abnormality Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 101001133081 Homo sapiens Mucin-2 Proteins 0.000 description 1
- 102100034263 Mucin-2 Human genes 0.000 description 1
- 230000003698 anagen phase Effects 0.000 description 1
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- 230000002547 anomalous effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000003245 coal Substances 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- 238000004804 winding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- 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
Abstract
The invention discloses a method for detecting a worked-out section of a metal mine.The method comprises the steps that measurement points are selected in a measurement area, and the measurement points are numbered as 1-n; 2, parameters of a transmitter is adjusted, and a receiver is adjusted, wherein setting of the attenuation amplitude of a receiving signal is included; 3, the transmitter transmits a bipolar rectangular pulse signal with the amplitude being V to a transmitting coil, conversion from a primary field to a secondary field is conducted underground, and the receiver receives a secondary field signal of a receiving coil and conducts data recording and processing, so that single-point single-voltage grade measurement is completed; 4, at the position of the point No.1, the transmitting voltage is changed, multi-voltage grade measurement of the point No.1 is completed, then the process is repeated for the point No.2, multi-voltage grade measurement of the point No.2 is completed, and multi-voltage grade measurement of the point No.1-n is completed; 5, data processing is conducted, and the position of the underground worked-out section is obtained by finding abnormality of data of the corresponding period.By means of the method, on the premise of guaranteeing effectiveness of the data, the effect that detection of the maximum depth conducted within the shortest dead time can be achieved.
Description
Technical field
The invention belongs to field of geophysical exploration, particularly relate to a kind of metallic ore Mined-Out Areas method.
Background technology
From 20th century middle and late stage so far, China's capital construction is constantly carried out, and demand and use to metallic mineral resources are constantly in Fast growth phase, and there are more than 10,000 underground metal mine, more than 20 hundred million tons of Ores of annual output in current China.But after metallic mineral resources exploitation utilizes, owing to the change of geological conditions defines substantial amounts of goaf, the existence in a large amount of goafs makes mining worsening condition, and the original mechanical balance of subterranean body is broken, at any time it may happen that the accident such as displacement, rock burst；More seriously goaf can by the filling such as gas, subsoil water, and before not verifying situation, construction exists huge potential safety hazard.Therefore detection goaf be always up resource exploration field must faced by a difficult problem.
Present stage, the domestic rare detection method for metallic ore goaf, it is usually and continues to use the transient electromagnetic method that coal mine gob is traditional.Transient electromagnetic method is based on electromagnetic induction principle, when the emission current in transmitting coil suddenly drops to zero, primary field can be induced around coil, primary field communication process can produce vortex current in the conducting medium of underground, vortex current can propagate secondary field in change procedure to earth's surface, by secondary field being received and inverting judges geological anomalous body.In metal mine, owing to geologic body resistivity is low, underground can form several irregular screen layers, it is necessary to adopts big current design to be penetrated by signal；Simultaneously in order to ensure the detection accuracy in goaf, it is necessary to adopt little coil design.The design of the big electric current of little coil necessarily causes that winding inductance quantity is big, thus make emission current can not realize moment shutoff but create one period of turn-off time, in during this period of time, this launches by force signal with regard to being mixed into again in faint reception signal, it is impossible to is analyzed inverting, is called Dead Time.Dead Time is long makes this part reception signal to be used effectively, and then causes that goaf is failed to report.Metal mine is just can be applicable to it is thus desirable to carry out redesigning.
Summary of the invention
The technical problem to be solved is in that to provide a kind of metallic ore Mined-Out Areas method, can realize completing the detection of depth capacity with the shortest Dead Time under the premise ensureing data validity.
A kind of metallic ore Mined-Out Areas method, it is characterised in that comprise the following steps that
A. surveying selected measuring point in district, encoding 1～n, lay transmitting coil and receiving coil on the ground centered by No. 1 measuring point, the two is laid in Coincident loop mode；Being connected with transmitting coil by the emission port of transmitter, the receiving port of receiver is connected with receiving coil, is connected with synchronous signal line between synchronous port and the synchronous port of receiver of transmitter；
B. the parameter regulating transmitter includes: regulating emitting voltage V, different voltage can reach different emission depths；Regulate the length of t1 launch time, control the length of transmitted waveform；Regulating the length of delay time t2, this parameter decides transmitter can send synchronizing signal in the suitable time to receiver；Regulate acquisition time t4；Regulate receiver to include setting the attenuation amplitude receiving signal；
C. transmitter sends, to transmitting coil, the bipolarity rectangular pulse signal that amplitude is V, in underground through the transformation of primary field to secondary field, received the secondary field signal in receiving coil by receiver and carry out data record and process, completing the measurement of single-point univoltage grade；
D. on the position of No. 1 point, changing emitting voltage, repeat the process of above-mentioned b-c, the multi-voltage grade completing No. 1 point is measured, then No. 2 points will be repeated said process, and the multi-voltage grade completing No. 2 points is measured, and the multi-voltage grade being sequentially completed 1～n point is measured.
E. the data collected include the time and electric current is depicted as function curve, carry out data process to include: 1. intercepted by some groups of data minute different periods of No. 1 point, different voltage V1, V2 ... Vn represents, V1 electric pressure intercepts T1 section time data, V2 electric pressure intercepts T2 section time data, intercept Tn section time data to Vn electric pressure, each segment data after intercepting is normalized, fits to a smoothed curve L1；2. the Data duplication above-mentioned steps of No. 2 points, fits to a smoothed curve L2, same, is sequentially completed the matching of curve L1～Ln；3. curve L1～Ln is carried out inverting at inversion workbench, by finding that the exception of contemporaneous data draws the position of Goaf Area.
Further, the transmitter adopted includes:
MCU, for control core；
Band switch group, is connected with described MCU and is used for carrying out parameter setting；
Storage capacitor, be connected by DC-DC booster circuit between MCU after by DC-DC booster circuit, storage capacitor is charged to the magnitude of voltage of setting；
Voltage collection circuit, is connected between MCU and storage capacitor, gathers the magnitude of voltage of storage capacitor and is transferred to MCU；
IGBT bridge, is connected with described storage capacitor, and makes storage capacitor launch alternation bipolarity rectangular pulse to transmitting coil by IGBT drive circuit break-make under the control of MCU.
Further, the receiver adopted includes:
Attenuator circuit, is connected with receiving coil, and the signal received by receiving coil regulates according to attenuation multiple；
Band switch, is connected with described attenuator circuit and sets the attenuation amplitude receiving signal；
PC, passing sequentially through AD Acquisition Circuit and modulate circuit is connected with attenuator circuit, the conditioned circuit of signal is transferred to PC by the conversion of AD Acquisition Circuit after regulating, described PC be connected with transmitter after the synchronizing signal that sends of receiver/transmitter, and data are processed.
Further, by the methods such as stress and strain model selected measuring point in survey district in step a).
Further, band switch group to MCU set when time measure relevant parameter, including emitting voltage V, launch time t1, delay time t2 and acquisition time t4.
Further, if storage capacitor current voltage is more than or equal to the voltage set in MCU, then stopping charging, simultaneously MCU realizes storage capacitor and launches bipolarity rectangular pulse by controlling the break-make of IGBT bridge to transmitting coil.
Further, the sequencing contro flow process of MCU is as follows:
Detect current storage capacitor voltage；
If storage capacitor voltage is less than setting value, then send charging signals to DC-DC booster power；
If storage capacitor voltage is be more than or equal to setting value, then stop charging and control the transmitting forward current pulse of IGBT bridge, stop after persistent period t1 launching, then synchronizing signal is sent to receiver after waiting time t2, synchronizing signal duration t3 is fixed value, detects current storage capacitor voltage after waiting time t4；
If less than setting value, send charging signals to DC-DC booster circuit；
If be more than or equal to setting value, stopping charging, the charging interval, duration t5 did not fix；
Control IGBT bridge and launch reverse current pulses；
Repeat said process until measuring and terminating.
The present invention is achieved in that
The present invention is compared with prior art, have the beneficial effects that: the inventive method is based upon on the basis of electromagnetic induction principle, take multiple measurements by launching different electric pressure pulse, carrying out back analysis again after the data collected are carried out segmentation intercepting, normalized, the method can realize completing the detection of depth capacity with the shortest Dead Time under the premise ensureing data validity.
By controlling the discharge and recharge of storage capacitor, it is achieved that the transmitting of high-power signal under field condition；Various measurement parameter is set by band switch group and makes simple to operate, improve the reliability of instrument under field condition；The method can realize the high-power transmitting of little coil under condition in the wild, and investigation depth is big, precision is high, highly reliable.The method can realize metallic ore goaf is effectively detected, and then provides safeguard for mining area safety production.
Accompanying drawing explanation
Fig. 1 is the modular structure block diagram of the equipment that the embodiment of the present invention provides；
Fig. 2 is the MCU work schedule schematic diagram that the embodiment of the present invention provides；
Fig. 3 is the multimetering schematic flow sheet that the embodiment of the present invention provides；
Fig. 4 is data cutout and the splicing schematic diagram of embodiment of the present invention offer.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
As it is shown in figure 1, the present invention is achieved in that a kind of metallic ore Mined-Out Areas method, the detection device of employing includes transmitter 10, receiver 17, transmitting coil 6 and receiving coil 7.Transmitter 10 includes band switch group 1, MCU2, DC-DC booster circuit 3, storage capacitor 4, IGBT bridge 5, IGBT drive circuit 9 and voltage collection circuit 8；Band switch group 1 is connected with MCU2 and carries out parameter setting, MCU2 is connected with IGBT drive circuit 9, IGBT drive circuit 9 is connected to IGBT bridge 5 and controls its break-make, MCU2 is connected with DC-DC booster circuit 3, DC-DC booster circuit 3 is connected to storage capacitor 4 to its charging, storage capacitor 4 is connected with MCU2 by voltage collection circuit 8, and storage capacitor 4 is connected with IGBT bridge 5 simultaneously, and the outfan of IGBT bridge 5 is connected with transmitting coil 6.
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, the outfan of attenuator circuit 12 is connected with modulate circuit 13, attenuator circuit 12 is connected with band switch 11 simultaneously, receive its attenuation multiple instruction, the outfan of modulate circuit 13 is connected with AD Acquisition Circuit 14, the outfan of AD Acquisition Circuit 14 is connected to flat board PC 16 by serial ports 15 and carries out data process, and flat board PC 16 is connected for receiving its synchronizing signal sent with the MCU2 of transmitter 10.
Specific works process comprises the steps:
1) MCU2 is set the relevant parameter of this measurement by the band switch group 1 regulating transmitter 10, including emitting voltage V, launch time t1, delay time t2 and acquisition time t4 etc.；Regulate the band switch 11 on receiver 17 and set the attenuation amplitude receiving signal；
2) storage capacitor 4 is charged by MCU2 control DC-DC booster circuit 3, and voltage collection circuit 8 constantly detects the voltage V1 of storage capacitor 4 simultaneously, and is fed back to MCU2.If current voltage is less than 1) the middle voltage set, it may be assumed that V1 < V, then continue charging；
3) if current voltage is more than or equal to 1) the middle voltage set, that is: V1 >=V, then stop charging, MCU2 controls the break-make of IGBT bridge 5 by controlling IGBT drive circuit 9 simultaneously, IGBT bridge 5 as switching-type device between storage capacitor 4 and transmitting coil 6, MCU2 makes storage capacitor 4 launch alternation bipolarity rectangular pulse to transmitting coil 6 by controlling the break-make of IGBT bridge 5, amplitude is sized to V, transmitting coil 6 launches primary field to underground, the geologic body of primary field traverse search coverage, 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 through a series of process at this, including according to step 1) in be set by signal attenuation circuit 12, modulate circuit 13, AD Acquisition Circuit 14, finally by serial ports 15, data are passed to flat board PC 16, flat board PC 16 receives step 3) in the data that start serial ports 15 is transmitted after the synchronizing signal that sends of MCU2 be recorded, so far complete the single single electric pressure measuring point and measure；
As shown in Figure 2, in this device, MCU2 is core, accurately control modules collaborative work, MUC2 sequencing contro flow process is as follows: detection capacitance present voltage V1, if V1 is < V, then send charging signals to DC-DC booster circuit 3, if V1 >=V, then stopping charges and control IGBT bridge 5 launches forward current pulse, stop after persistent period t1 launching, synchronizing signal is sent to the flat board PC16 of receiver 17 again after waiting time t2, stop after persistent period t3 launching, again after waiting time t4, detection capacitance present voltage V1, if V1 is < V, start to send charging signals to DC DC booster circuit 3, until V1 >=V being detected, then stopping charges and control IGBT bridge 5 launches reverse current pulses, repeat said process until detection terminates.
Metallic ore Mined-Out Areas method is carried out, including following sequence and step by above-mentioned device:
A. by methods such as stress and strain model surveying selected measuring point in district, 1～n is encoded.Laying transmitting coil 6 and receiving coil 7 centered by No. 1 measuring point on the ground, the two is laid in Coincident loop mode.Being connected with transmitting coil 6 by the emission port of transmitter 10, the receiving port of receiver 17 is connected with receiving coil 7, is connected with synchronous signal line between synchronous port and the synchronous port of receiver of transmitter 10.
B. the band switch group 1 on transmitter 10 is adjusted to suitable gear respectively: (1) regulates emitting voltage V, and different voltage can reach different emission depths；(2) regulating the length of t1 launch time, the length (3) controlling transmitted waveform regulates the length of delay time t2, and this parameter decides MCU2 can send synchronizing signal in the suitable time to flat board PC16；(4) regulating acquisition time t4, the different degree of depth needs corresponding acquisition time to guarantee the accurate of data；Regulate the band switch 11 on receiver 17 and set the attenuation amplitude receiving signal, in order to avoid the excessive damage instrument of signal amplitude.
C. switching on power, instrument is started working.Specific works process as described above, transmitter sends, to transmitting coil, the bipolarity rectangular pulse signal that amplitude is V, in underground through the transformation of primary field to secondary field, received the secondary field signal in receiving coil by receiver and carry out data record and process, so far complete the measurement of single-point univoltage grade, close instrument.It is not required to during this period instrument is operated.
D. as it is shown on figure 3, on the position of No. 1 point, change emitting voltage and other parameters of band switch group, repeat said process, the multi-voltage grade completing No. 1 point is measured.Instrument and coil being put into No. 2 points again and repeats said process, the multi-voltage grade completing No. 2 points is measured.Same, the multi-voltage grade having had 1～n point altogether is measured.
E. as shown in Figure 4, the data collected present with function curve form, and tn represents the Dead Time under Vn electric pressure, and Tn represents the sample time under Vn electric pressure, and electric pressure is more high, and Dead Time tn is more long.Data process is carried out by the data processing platform (DPP) of flat board PC: 1. intercepted by some groups of data minute different periods of No. 1 point after taking each group of data, V1 electric pressure intercepts T1 segment data, and V2 electric pressure intercepts T2 segment data ... Vn electric pressure intercepts Tn segment data.Again each segment data after intercepting is normalized, fits to a smoothed curve L1.2. the Data duplication above-mentioned steps of No. 2 points, fits to a smoothed curve L2, same, is sequentially completed the matching of curve L1～Ln.3. curve L1～Ln is carried out inverting at inversion workbench, by finding that the exception of contemporaneous data draws the position of Goaf Area.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (7)
1. a metallic ore Mined-Out Areas method, it is characterised in that comprise the following steps that
A. surveying selected measuring point in district, encoding 1～n, lay transmitting coil and receiving coil on the ground centered by No. 1 measuring point, the two is laid in Coincident loop mode；Being connected with transmitting coil by the emission port of transmitter, the receiving port of receiver is connected with receiving coil, is connected with synchronous signal line between synchronous port and the synchronous port of receiver of transmitter；
B. the parameter regulating transmitter includes: regulate emitting voltage V, V=V1, V2 ... Vn, different voltage can reach different emission depths；Regulate the length of t1 launch time, control the length of transmitted waveform；Regulating the length of delay time t2, this parameter decides transmitter can send synchronizing signal in the suitable time to receiver；Regulate acquisition time t4；Regulate receiver to include setting the attenuation amplitude receiving signal；
C. transmitter sends, to transmitting coil, the bipolarity rectangular pulse signal that amplitude is V, in underground through the transformation of primary field to secondary field, received the secondary field signal in receiving coil by receiver and carry out data record and process, completing the measurement of single-point univoltage grade；
D. on the position of No. 1 point, changing emitting voltage, repeat the process of above-mentioned b-c, the multi-voltage grade completing No. 1 point is measured, then No. 2 points will be repeated said process, and the multi-voltage grade completing No. 2 points is measured, and the multi-voltage grade being sequentially completed 1～n point is measured.
E. the data collected include the time and electric current is depicted as function curve, carry out data process to include: 1. intercepted by some groups of data minute different periods of No. 1 point, different voltage V1, V2 ... Vn represents, V1 electric pressure intercepts T1 section time data, V2 electric pressure intercepts T2 section time data, intercept Tn section time data to Vn electric pressure, each segment data after intercepting is normalized, fits to a smoothed curve L1；2. the Data duplication above-mentioned steps of No. 2 points, fits to a smoothed curve L2, same, is sequentially completed the matching of curve L1～Ln；3. curve L1～Ln is carried out inverting at inversion workbench, by finding that the exception of contemporaneous data draws the position of Goaf Area.
2. the metallic ore Mined-Out Areas method described in claim 1, it is characterised in that the transmitter adopted includes:
MCU, for control core；
Band switch group, is connected with described MCU and is used for carrying out parameter setting；
Storage capacitor, be connected by DC-DC booster circuit between MCU after by DC-DC booster circuit, storage capacitor is charged to the magnitude of voltage of setting；
Voltage collection circuit, is connected between MCU and storage capacitor, gathers the magnitude of voltage of storage capacitor and is transferred to MCU；
IGBT bridge, is connected with described storage capacitor, and makes storage capacitor launch alternation bipolarity rectangular pulse to transmitting coil by IGBT drive circuit break-make under the control of MCU.
3. the metallic ore Mined-Out Areas method described in claim 1, it is characterised in that the receiver adopted includes:
Attenuator circuit, is connected with receiving coil, and the signal received by receiving coil regulates according to attenuation multiple；
Band switch, is connected with described attenuator circuit and sets the attenuation amplitude receiving signal；
PC, passing sequentially through AD Acquisition Circuit and modulate circuit is connected with attenuator circuit, the conditioned circuit of signal is transferred to PC by the conversion of AD Acquisition Circuit after regulating, described PC be connected with transmitter after the synchronizing signal that sends of receiver/transmitter, and data are processed.
4. the metallic ore Mined-Out Areas method described in claim 1, it is characterised in that by the methods such as stress and strain model selected measuring point in survey district in step a).
5. the metallic ore Mined-Out Areas method described in claim 2, it is characterised in that band switch group to MCU set when time measure relevant parameter, including emitting voltage V, launch time t1, delay time t2 and acquisition time t4.
6. the metallic ore Mined-Out Areas method described in claim 2, it is characterized in that, if storage capacitor current voltage is more than or equal to the voltage set in MCU, then stopping charging, simultaneously MCU realizes storage capacitor and launches bipolarity rectangular pulse by controlling the break-make of IGBT bridge to transmitting coil.
7. the metallic ore Mined-Out Areas method described in claim 2, it is characterised in that the sequencing contro flow process of MCU is as follows:
Detect current storage capacitor voltage；
If storage capacitor voltage is less than setting value, then send charging signals to DC-DC booster power；
If storage capacitor voltage is be more than or equal to setting value, then stop charging and control the transmitting forward current pulse of IGBT bridge, stop after persistent period t1 launching, then synchronizing signal is sent to receiver after waiting time t2, synchronizing signal duration t3 is fixed value, detects current storage capacitor voltage after waiting time t4；
If less than setting value, send charging signals to DC-DC booster circuit；
If be more than or equal to setting value, stopping charging, the charging interval, duration t5 did not fix；
Control IGBT bridge and launch reverse current pulses；
Repeat said process until measuring and terminating.
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