CN2510865Y - Electromagnetic radiation monitoring device for coal rock dynamic disaster - Google Patents
Electromagnetic radiation monitoring device for coal rock dynamic disaster Download PDFInfo
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- CN2510865Y CN2510865Y CN 01272808 CN01272808U CN2510865Y CN 2510865 Y CN2510865 Y CN 2510865Y CN 01272808 CN01272808 CN 01272808 CN 01272808 U CN01272808 U CN 01272808U CN 2510865 Y CN2510865 Y CN 2510865Y
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- 239000003245 coal Substances 0.000 title claims abstract description 26
- 230000005670 electromagnetic radiation Effects 0.000 title claims abstract description 24
- 239000011435 rock Substances 0.000 title claims abstract description 23
- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000005669 field effect Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 18
- 239000002689 soil Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The electromagnetic radiation monitoring device for coal and rock dynamic disaster is suitable for real-time monitoring mine impact pressure and coal and gas outburst, and is formed from electromagnetic information receiving antenna, wide-band amplifier and main circuit using 8096 series single-chip microcomputer as centre, and can detect and calculate electromagnetic radiation intensity and pulse number of the tested object by means of software, and can utilize digital tube to display, and can monitor coal and rock concrete stress state of impact pressure, coal and gas outburst, rock-soil landslide and dam instability, etc. and can forecast disaster.
Description
The utility model relates to a kind of coal rock dynamic disaster electromagnetic radiation monitoring device, be particularly useful for the outstanding real-time monitoring of mine impulsion pressure and coal and gas, add that necessary instrument also can be used for the monitoring of other coal petrography disaster power such as the rock burst danger of prediction mine, roof caving, large-scale rock concrete construction unstability.
The monitoring of known coal rock dynamic disaster, main employing is drilled and is measured, and not only complicated operation, and poor reliability had both influenced operating rate, had expended lot of manpower and material resources again.And do not take the working time and the contactless Forecasting Methodology of the construction that do not need to drill mainly adopts following two kinds of methods, and the first adopts sound emission monitoring technology, and its effect is not fine.Main cause: 1, acoustic emission signal is very weak, even does not have signal; 2, acoustic emission and Equipment Requirement sensor and coal petrography concrete well are coupled, and this is very difficult in actual field, can't realize portable monitoring; 3, acoustic emission monitoring system is subjected to the influence of other course of work in the external world and the monitoring of environmental bigger, gets rid of very difficulty of external interference, particularly in the workplace.It two is to utilize the gas of the environmental monitoring system continuous monitoring workplace variation characteristic of gushing out, and analyze the relation of gushing out with outstanding, thereby indirect predictions is outstanding.It is more unilateral, and reliability is relatively poor.
The purpose of this utility model provide a kind of can be outstanding to coal and gas, coal rock dynamic disaster such as the rock burst device that carries out the accurate and effective monitoring and prediction, realization is discontiguous to coal petrography, and directed, regional, dynamic monitoring forecast coal rock dynamic disaster phenomenon also continuously realizes the coal rock dynamic disaster electromagnetic radiation monitoring device of continuous monitoring or the artificial discontinuous monitoring of setting to coal petrography.
The utility model coal rock dynamic disaster electromagnetic radiation monitoring device is connected to the signal input part of amplifying circuit by the receiving antenna signal output part, and the output terminal of amplifying circuit is divided into two-way, and one the tunnel links to each other with the HIS.1 of single-chip microcomputer, and single-chip microcomputer carries out step-by-step counting to it; Another road is connected to the analog quantity input end of A/D converter, the data port D0 of A/D converter～D9 is connected to the data port D0～D9 of data-carrier store and data buffer, the OE of A/D converter links to each other with the HSO.3 mouth of single-chip microcomputer with the STBY mouth, by Single-chip Controlling A/D switching rate.The A0 of data-carrier store～A14 mouth links to each other with the A0～A14 of address generator, and data-carrier store is mainly used in the instantaneous test data of storage, and the high-speed output hso .5 of single-chip microcomputer is connected to the Enable Pin OE of data-carrier store, the storage time of control store; The Q3 mouth of address generator links to each other with the HIS.0 mouth of single-chip microcomputer, and the MR mouth of address generator links to each other with the HSO.4 mouth of single-chip microcomputer, as control and look-at-me.The AD0 of data buffer～AD7 mouth links to each other with the P3.0～P3.7 of single-chip microcomputer, and single-chip microcomputer is to signal sampling, and calculates electromagnetic radiation intensity numerical value.The RXD mouth of single-chip microcomputer links to each other with the RXD mouth of the RO mouth of serial interface chip and remote communication interface chip, the TXD mouth of single-chip microcomputer links to each other with the TXD mouth of the TI mouth of serial interface chip and remote communication interface chip, serial interface chip can convert the single-chip microcomputer Transistor-Transistor Logic level to the RS232 serial port level of computing machine, finish the communication function of single-chip microcomputer, and the remote communication interface chip is mainly finished the telecommunication between single-chip microcomputer and the computing machine.The parallel port P3.0 of single-chip microcomputer～P3.7 links to each other with the AD0～AD7 of address latch, link to each other with the data port D0～D7 of program storage and data-carrier store simultaneously, delivery outlet Q0～the Q7 of address latch links to each other with the address mouth A0～A7 of program storage and data-carrier store, delivery outlet Q0, the Q1 of address latch links to each other with the RS of display, RW mouth, P4.0～P4.7 the mouth of single-chip microcomputer links to each other with the A8～A14 mouth of program storage and data-carrier store simultaneously, and the P1.4～P1.7 of single-chip microcomputer links to each other with the A15～A18 of data-carrier store.The P0.1 of single-chip microcomputer～0.2, P1.0～1.3 mouthful link to each other with 2 lines of keyboard, 4 alignments, and P3.0～P3.7 links to each other with the DB0～DB7 mouth of display.The Q3 of address generator, MR mouth link to each other with HIS.0, the HIS.2 mouth of single-chip microcomputer, and the CLK mouth links to each other with the CLKON mouth of frequency divider, link to each other with the CLK mouth of A/D converter simultaneously, and the CLKOUT mouth of frequency divider links to each other with the CLKOUT mouth of single-chip microcomputer.Receiving antenna is a high sensitivity broadband directional receiving antenna, includes the coil dipole antenna of ferrite iron core, and there is metal screen layer the outside, the screen layer opening direction has 30 degree and 60 to spend two kinds, antenna length is 350～450mm, and diameter is φ 40mm, and it receives frequency range is 1kHz～1MHz.The signal that receiving antenna receives is input to the grid A end of field effect transistor M1 by the IN end through capacitor C 1, capacitor C 1 links to each other with resistance R 2 one ends with M1 simultaneously, the other end of resistance R 2 links to each other with the tie point B of R3 with resistance R 1, the other end of resistance R 1 links to each other with power supply E, and the other end of resistance R 3 links to each other with ground F; The drain electrode of field effect transistor M1 links to each other with power supply E, source electrode and resistance R 4, the link C of resistance R 5 and capacitor C 2 links to each other, the other end of resistance R 4 links to each other with ground F, the other end of resistance R 5 links to each other with power supply E, the other end of capacitor C 2 and resistance R 6, the tie point D of the positive input terminal of R7 and amplifier A1A links to each other, the other end of resistance R 6 links to each other with power supply E, the other end of resistance R 7 links to each other with ground F, the negative input end of amplifier A1A links to each other with the tie point J of R9 with resistance R 8, the other end of resistance R 8 and capacitor C 3, the tie point G of resistance R 11 and R12 links to each other, the other end of capacitor C 3 links to each other with ground F, the other end of resistance R 11 links to each other with the positive input terminal of amplifier A2A and the tie point I of capacitor C 5, the other end of resistance R 12 links to each other with the negative input end of amplifier A2A and the tie point K of resistance R 13, and the other end of resistance R 13 links to each other with the output terminal OUT of amplifier A2A; The other end of resistance R 9 links to each other with the output terminal tie point H of resistance R 10 and amplifier A1A, and the output terminal of amplifier A1A is received on the ground F through capacitor C 4, and the other end of resistance R 10 is connected with capacitor C 5.
The utility model coal rock dynamic disaster electromagnetic radiation monitoring device adopts contactless receiving antenna, realizes contactless continuous prediction.The existing mine greatly of China belongs to has coal and gas to give prominence to and the rock burst mine, not only can bring a large amount of casualties, also can have a strong impact on the social benefit and the economic benefit in colliery.Mine all drops into very big man power and material and carry out gas outbursts Prediction and control every year.Electromagnetic radiation method prediction gas outburst risk technology and necessary instrument, make gas outbursts Prediction time saving and energy saving, need not to drill little impact on production, accuracy rate height, drop into minimum, can carry out prediction quick, easy, exactly, guarantee safety, make mine produce maximum social benefit and economic benefit, in monitoring and prediction, do not influence production, can save a large amount of workloads and expense.This technology and necessary instrument also can be used for the monitoring of other coal petrography disaster power such as the rock burst danger of prediction mine, roof caving, large-scale rock concrete construction unstability, also can be used for the research of material deformation failure mechanism such as rock concrete and process.
Accompanying drawing 1 is an electromagnetic radiation monitoring device circuit schematic diagram;
Accompanying drawing 2 is electromagnetic radiation monitoring device pre-amplification circuit schematic diagrams;
Accompanying drawing 3 is electromagnetic radiation monitoring keyboard of device input circuit schematic diagrams.
The utility model is described in further detail below in conjunction with the embodiment in the accompanying drawing:
Fig. 1 is an electromagnetic radiation monitoring device circuit schematic diagram.Receiving antenna 1 receiving electromagnetic radiation signal, this signal is connected to the signal input part IN of amplifying circuit 2, and the output terminal OUT of amplifying circuit 2 is divided into two-way, and one the tunnel links to each other with the HIS.1 of 80C196 single-chip microcomputer 9, and single-chip microcomputer 9 carries out step-by-step counting to it; Another road is connected to the analog quantity input end AIN of TLC876C A/D converter 4, the data port D0 of A/D converter 4～D9 is connected to the data port D0～D9 of 62256 data-carrier stores 5 and 74HC245 data buffer 8, the OE of A/D converter 4 links to each other with the HSO.3 mouth of 80C196 single-chip microcomputer 9 with the STBY mouth, by single-chip microcomputer 9 control A/D switching rates.The A0 of data-carrier store 5～A14 mouth links to each other with the A0～A14 of 74LS393 address generator 6, data-carrier store 5 is mainly used in the instantaneous test data of storage, the high-speed output hso .5 of single-chip microcomputer 9 is connected to the Enable Pin OE of data-carrier store 5, the storage time of control store 5; The Q3 mouth of address generator 6 links to each other with the HIS.0 mouth of single-chip microcomputer 6, and the MR mouth of address generator 6 links to each other with the HSO.4 mouth with single-chip microcomputer 6, as control and look-at-me.The AD0 of data buffer 8～AD7 mouth links to each other with the P3.0～P3.7 of single- chip microcomputer 9,9 pairs of signal samplings of single-chip microcomputer, and calculate electromagnetic radiation intensity numerical value.The RXD mouth of single-chip microcomputer 9 links to each other with the RXD mouth of the RO mouth of RS232 serial interface chip 14 and 45442 remote communication interface chips 45442, the TXD mouth of single-chip microcomputer 9 links to each other with the TXD mouth of the TI mouth of serial interface chip 14 and remote communication interface chip 15, serial interface chip 14 can become single-chip microcomputer 9TTL level conversion the RS232 serial port level of computing machine, finish the communication function of single-chip microcomputer, and remote communication interface chip 15 is mainly finished the telecommunication between single-chip microcomputer and the computing machine.The parallel port P3.0 of single-chip microcomputer 9～P3.7 links to each other with the AD0～AD7 of 74LS373 address latch 16, link to each other with the data port D0～D7 of 27C128 program storage 10 and HM628512 data-carrier store 11 simultaneously, delivery outlet Q0～the Q7 of address latch 16 links to each other with the address mouth A0～A7 of program storage 10 and data-carrier store 11, the delivery outlet Q0 of address latch 16, the RS of Q1 and CM1640 display 13, the RW mouth links to each other, P4.0～P4.7 the mouth of single-chip microcomputer 9 links to each other with the A8～A14 mouth of program storage 10 and data-carrier store 11 simultaneously, and the P1.4～P1.7 of single-chip microcomputer 9 links to each other with the A15～A18 of data-carrier store 11.The P0.1 of single-chip microcomputer 9～0.2, P1.0～1.3 mouthful link to each other with 2 lines of keyboard 12,4 alignments, and P3.0～P3.7 links to each other with the DB0～DB7 mouth of display 13.The Q3 of address generator 6, MR mouth link to each other with HIS.0, the HIS.2 mouth of single-chip microcomputer 9, and the CLK mouth links to each other with the CLKON mouth of 74LS393 frequency divider 7, link to each other with the CLK mouth of A/D converter 4 simultaneously, and the CLKOUT mouth of frequency divider 7 links to each other with the CLKOUT mouth of single-chip microcomputer 9.Receiving antenna 1 is a high sensitivity broadband directional receiving antenna, includes the coil dipole antenna of ferrite iron core, and there is metal screen layer the outside, the screen layer opening direction has 30 degree and 60 to spend two kinds, antenna length is 350～450mm, and diameter is φ 40mm, and it receives frequency range is 1kHz～1MHz.
Accompanying drawing 2 is electromagnetic radiation monitoring device pre-amplification circuit schematic diagrams.The signal that receiving antenna 1 receives is input to the A end of field effect transistor M1 by the IN end through capacitor C 1, capacitor C 1 links to each other with resistance R 2 one ends with M1 simultaneously, the other end of resistance R 2 links to each other with the tie point B of R3 with resistance R 1, and the other end of resistance R 1 links to each other with power supply E, and the other end of resistance R 3 links to each other with ground F; The end of field effect transistor M1 links to each other with power supply E, drain electrode and resistance R 4, the link C of resistance R 5 and capacitor C 2 links to each other, the other end of resistance R 4 links to each other with ground F, the other end of resistance R 5 links to each other with power supply E, the other end of capacitor C 2 and resistance R 6, the tie point D of the positive input terminal of R7 and THS4001 amplifier A1A links to each other, the other end of resistance R 6 links to each other with power supply E, the other end of resistance R 7 links to each other with ground F, the negative input end of THS4001 amplifier A1A links to each other with the tie point J of R9 with resistance R 8, the other end of resistance R 8 and capacitor C 3, the tie point G of resistance R 11 and R12 links to each other, the other end of capacitor C 3 links to each other with ground F, the other end of resistance R 11 links to each other with the positive input terminal of amplifier A2A and the tie point I of capacitor C 5, the other end of resistance R 12 links to each other with the negative input end of THS4001 amplifier A2A and the tie point K of resistance R 13, and the other end of resistance R 13 links to each other with the output terminal OUT of THS4001 amplifier A2A; The other end of resistance R 9 links to each other with the output terminal tie point H of resistance R 10 and amplifier A1A, and the output terminal of amplifier A1A is received on the ground F through capacitor C 4, and the other end of resistance R 10 is connected with capacitor C 5.
Accompanying drawing 3 is electromagnetic radiation monitoring keyboard of device input circuit schematic diagrams.The P0.1 of single-chip microcomputer 9～0.2, P1.0～1.3 mouthful link to each other with 2 lines of keyboard 12,4 alignments, the point of crossing access function key P of every line and alignment, when this key P presses, this line and alignment short circuit, single-chip microcomputer 9 is judged according to this signal, is made corresponding operation and calculating.
Claims (5)
1. coal rock dynamic disaster electromagnetic radiation monitoring device is characterized in that:
A. it is connected to the signal input part IN of amplifying circuit (2) by the output terminal of receiving antenna (1), the output terminal OUT of amplifying circuit (2) is divided into two-way, one the tunnel links to each other with the HIS.1 of single-chip microcomputer 9, another road is connected to the analog quantity input end AIN of A/D converter (4), data port D0～the D9 of A/D converter (4) is connected to the data port D0～D9 of data-carrier store (5) and data buffer (8), the OE of A/D converter (4) links to each other with the HSO.3 mouth of STBY mouth with single-chip microcomputer (9), the A0 of data-carrier store (5)～A14 mouth links to each other with the A0～A14 of address generator (6), the AD0 of data buffer (8)～AD7 mouth links to each other with the P3.0～P3.7 of single-chip microcomputer (9), the RXD mouth of single-chip microcomputer (9) links to each other with the RO mouth of serial interface chip (14) and the RXD mouth of remote communication interface chip (15), and the TXD mouth of single-chip microcomputer (9) links to each other with the TI mouth of serial interface chip (14) and the TXD mouth of remote communication interface chip (15).
B. the parallel port P3.0～P3.7 of single-chip microcomputer (9) links to each other with the AD0～AD7 of address latch (16), link to each other with the data port D0～D7 of program storage (10) and data-carrier store (11) simultaneously, delivery outlet Q0～the Q7 of address latch (16) links to each other with the address mouth A0～A7 of program storage (10) with data-carrier store (11), the delivery outlet Q0 of address latch (16), the RS of Q1 and display (13), the RW mouth links to each other, P4.0～P4.7 the mouth of single-chip microcomputer links to each other with the A8～A14 mouth of program storage (10) and data-carrier store (11) simultaneously, and the P1.4～P1.7 of single-chip microcomputer (9) links to each other with the A15～A18 of data-carrier store (11).
C. P0.1～0.2 of single-chip microcomputer (9), P1.0～1.3 mouthful link to each other with 2 lines of keyboard (12), 4 alignments, and P3.0～P3.7 links to each other with the DB0～DB7 mouth of display (13).
D. the Q3 of address generator (6), MR mouth link to each other with HIS.0, the HIS.2 mouth of single-chip microcomputer (9), the CLK mouth links to each other with the CLKON mouth of frequency divider (7), link to each other with the CLK mouth of A/D converter (4) simultaneously, the CLKOUT mouth of frequency divider (7) links to each other with the CLKOUT mouth of single-chip microcomputer (9).
2. coal rock dynamic disaster electromagnetic radiation monitoring device according to claim 1 is characterized in that: employed single-chip microcomputer is 8096 series monolithics.
3. coal rock dynamic disaster electromagnetic radiation monitoring device according to claim 1, it is characterized in that: receiving antenna (1) includes the coil dipole antenna of ferrite iron core, there is metal screen layer the outside, the screen layer opening direction has 30 degree and 60 to spend two kinds, antenna length is 350～450mm, diameter is φ 40mm, and it receives frequency range is 1kHz～1MHz.
4. according to claim 1 and 3 described coal rock dynamic disaster electromagnetic radiation monitoring devices, it is characterized in that: the electromagnetic radiation information that electromagnetic antenna (1) receives is divided into two-way behind amplifying circuit (2): the HIS.1 pin of one tunnel single-chip microcomputer that directly connects (9); Receive on the AIN mould/number conversion interface of A/D conversion chip (4) on another road.
5. coal rock dynamic disaster electromagnetic radiation monitoring device according to claim 1, it is characterized in that: the signal that receiving antenna receives is input to the grid A end of field effect transistor M1 by the IN end through capacitor C 1, capacitor C 1 links to each other with resistance R 2 one ends with M1 simultaneously, the other end of resistance R 2 links to each other with the tie point B of R3 with resistance R 1, the other end of resistance R 1 links to each other with power supply E, and the other end of resistance R 3 links to each other with ground F; The drain electrode of field effect transistor M1 links to each other with power supply E, source electrode and resistance R 4, the link C of resistance R 5 and capacitor C 2 links to each other, the other end of resistance R 4 links to each other with ground F, the other end of resistance R 5 links to each other with power supply E, the other end of capacitor C 2 and resistance R 6, the tie point D of the positive input terminal of R7 and amplifier A1A links to each other, the other end of resistance R 6 links to each other with power supply E, the other end of resistance R 7 links to each other with ground F, the negative input end of amplifier A1A links to each other with the tie point J of R9 with resistance R 8, the other end of resistance R 8 and capacitor C 3, the tie point G of resistance R 11 and R12 links to each other, the other end of capacitor C 3 links to each other with ground F, the other end of resistance R 11 links to each other with the positive input terminal of amplifier A2A and the tie point I of capacitor C 5, the other end of resistance R 12 links to each other with the negative input end of amplifier A2A and the tie point K of resistance R 13, and the other end of resistance R 13 links to each other with the output terminal OUT of amplifier A2A; The other end of resistance R 9 links to each other with the output terminal tie point H of resistance R 10 and amplifier A1A, and the output terminal of amplifier A1A is received on the ground F through capacitor C 4, and the other end of resistance R 10 is connected with capacitor C 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01272808 CN2510865Y (en) | 2001-12-13 | 2001-12-13 | Electromagnetic radiation monitoring device for coal rock dynamic disaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01272808 CN2510865Y (en) | 2001-12-13 | 2001-12-13 | Electromagnetic radiation monitoring device for coal rock dynamic disaster |
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| Publication Number | Publication Date |
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| CN2510865Y true CN2510865Y (en) | 2002-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01272808 Expired - Lifetime CN2510865Y (en) | 2001-12-13 | 2001-12-13 | Electromagnetic radiation monitoring device for coal rock dynamic disaster |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487901A (en) * | 2008-08-29 | 2009-07-22 | 辽宁工程技术大学 | Rock mass charge radiation meter |
| CN100555000C (en) * | 2007-03-12 | 2009-10-28 | 中国矿业大学 | A kind of contactless rock pressure [in mine observation and evaluation method |
| CN101246217B (en) * | 2008-03-17 | 2010-06-02 | 陈洪凯 | Dangerous rock falling calamity early warning instrument and method thereof |
| CN102102533A (en) * | 2010-12-31 | 2011-06-22 | 中国矿业大学 | Method for forecasting real-time measurement of spatial geometrical information of coal rock dynamic disaster |
| CN106054266A (en) * | 2016-05-26 | 2016-10-26 | 辽宁工程技术大学 | Device and method for acquisition and processing of rock electromagnetic radiation signal |
-
2001
- 2001-12-13 CN CN 01272808 patent/CN2510865Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100555000C (en) * | 2007-03-12 | 2009-10-28 | 中国矿业大学 | A kind of contactless rock pressure [in mine observation and evaluation method |
| CN101246217B (en) * | 2008-03-17 | 2010-06-02 | 陈洪凯 | Dangerous rock falling calamity early warning instrument and method thereof |
| CN101487901A (en) * | 2008-08-29 | 2009-07-22 | 辽宁工程技术大学 | Rock mass charge radiation meter |
| CN102102533A (en) * | 2010-12-31 | 2011-06-22 | 中国矿业大学 | Method for forecasting real-time measurement of spatial geometrical information of coal rock dynamic disaster |
| CN102102533B (en) * | 2010-12-31 | 2013-07-03 | 中国矿业大学 | Method for forecasting real-time measurement of spatial geometrical information of coal rock dynamic disaster |
| CN106054266A (en) * | 2016-05-26 | 2016-10-26 | 辽宁工程技术大学 | Device and method for acquisition and processing of rock electromagnetic radiation signal |
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Expiration termination date: 20111213 Granted publication date: 20020911 |