CN1619340A - Real time monitoring forecasting device of coal rock dynamic disaster and forecasting method - Google Patents
Real time monitoring forecasting device of coal rock dynamic disaster and forecasting method Download PDFInfo
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Abstract
The coal petrographic dynamic calamity real-time monitoring prediction device and prediction method relate to a technique for continuously monitoring coal petrographic concrete deformation break'up electromagnetic radiation information and its device. Said device includes preamplifier, A/D converter, buffer, CPU, program memory, data memory, display, RS485 communication interface, standard signal output circuit and keyboard formed monitoring main machine, also includes antenna, power supply, KJ system branch station and KJ system center machine. Said invention also provides its real-time monitoring prediction method.
Description
Technical field
The present invention relates to a kind of by uninterruptedly monitoring technology and the device that coal petrography concrete deformation fracture electromagnetic radiation (EME) information is monitored coal petrography concrete deformation fracture process or prediction coal petrography concrete dynamic disaster in real time continuously.Belong to mine safety monitoring and prediction apparatus technology.
Background technology
Coal rock dynamic disaster phenomenon wide range relates to many engineerings field and disaster.Under mine conditions, have that coal and gas are outstanding, rock is given prominence to gas, the mine rock burst, top board subsides and Slope Sliding etc.; On the ground, there are rock-mass slippage, earthquake, dam foundation unstability and rock concrete construction unstability to collapse etc.The harm of coal rock dynamic disaster is huge, except that bringing a large amount of casualties, returns national economy and causes tremendous loss.The coal rock dynamic disaster phenomenon is especially with coal and the outstanding typical case the most of gas.Under mine conditions, along with the intensification of the depth of excavation and the continuous increase of output, the trend of coal rock dynamic disaster has increase such as coal and gas are outstanding.
Current quiescent operation face outburst danger forecasting techniques that adopts and equipment (drilling cuttings multiplying power method, boring gas gush out initial velocity method, drilling cuttings desorption of mash gas index method and other method of aggregative indicator), be called for short static method, all realize, therefore can be described as boring method again by holing.Static method is drilled and parametric measurement need take activity duration and space, and quantities is very big, and the prediction activity duration is also longer, and production is had certain influence, and forecasting institute costs also higher; Poor stability easily brings out dynamic disaster when drilling; The accuracy of static prediction method is lower, is subject to manually reach coal body influence pockety.Coal seam or coal body and the inner gas that is contained thereof not are equally distributed, neither be stable.Near predicting the outcome of obtaining boring only is local, can not represent the outburst hazard in the whole prediction step scope fully, the result who constantly obtains in prediction also is static, outburst hazard before can not representing coal body stable fully in whole period, because coal body is among the dynamic change, delaying outstanding is exactly illustration.Therefore the regional dynamically continuous positive paid more and more attention of Study on Forecast.
At present, outstanding dynamically continuous prediction has two approach: first sound emission monitoring technology.There are a large amount of defectives such as crack in coal and rock interior.The result that the coal petrography concrete breaks be exactly the crack generation, expand, converge perforation.Studies show that the generation in crack and expansion all will be with the form produce power radiation of elastic wave, acoustic emissions that Here it is.Countries such as the U.S., Canada and France are used for rock burst prediction with acoustic emission, developed acoustic emission monitoring system at middle nineteen seventies to countries such as the eighties USSR (Union of Soviet Socialist Republics) in latter stage, Australia, the U.S., Germany, Japan and Poland, it is outstanding to be used for prediction coal and gas, but its effect is not fine.Trace it to its cause, mainly be because the technical characterstic of acoustic emission determines: (1) acoustic emission is that coal petrography material stand under load produces when breaking, and in the slow deformation process of coal and rock, acoustic emission is very weak, even can not produce acoustic emission, so acoustic-emission is for forecasting that sensitivity is lower the early stage of disaster; (2) acoustic emission and Equipment Requirement sensor and coal petrography concrete well are coupled, and this is very difficult in actual field, particularly for very broken coal body.Acoustic emission and equipment are not real noncontact monitorings, and its operation is still comparatively complicated; (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.
Dynamically continuously the second method of prediction is to utilize the gas of the environmental monitoring system continuous monitoring workplace variation characteristic of gushing out, thereby it is outstanding to analyze the relation prediction of gushing out with outstanding.The technical indicator that prediction is adopted is that driving face is blown out the gas emission in back 30 minutes and the ratio V of coal breakage amount
30With the gas coefficient of alteration K that gushes out
vThis is a kind of single factor index in fact, has only considered the gas factor, and considers not that for the structure and the intensity of stress and coal and rock this obviously is quite unilateral, and its reliability is well imagined.
Compare with acoustic-emission, utilize the outstanding coal rock dynamic disaster that waits of the electromagnetic radiation forecasting coal that produces in coal rock deformation and the rupture process and gas, many advantages arranged: electromagnetic radiation information concentrated expression coal and the gas major influence factors of coal rock dynamic disaster such as giving prominence to; Electromagnetic radiation information is abundant than acoustic emission, even also have signal to produce in the deformation process (or rheology process) slowly in coal and rock (or coal containing methane gas body); Real noncontact, regionality, directed monitoring have been realized.The present invention has set up the dynamic discriminant criterion based on the coal rheology destructive process on the basis of a large amount of laboratory experiments, site test and theoretical analysis, invented the real-time prediction method that the critical value method combines with the dynamic trend method.Compare with existing forecasting procedure: more effective quick, significantly reduced workload, substantially be not subjected to external interference such as artificial (for electromagnetic interference (EMI) such as down-hole electromechanical equipments, then by taking shielding or directive reception technology to get rid of), continuous monitoring and forecast have been realized, do not influence production, can survey near the outburst hazard of rib and the orientation of outburst danger band, can check the effect of outburst prevention measures again.In nearly 25～30 years, no matter the research of electromagnetic radiation effect is theoretical research, still aspect applied research, has all obtained develop rapidly, but has mainly concentrated on the earthquake prediction field.Aspect the method and instrument of receiving electromagnetic radiation before seism information, a lot of achievements have also been obtained.Zhao Xiajun etc. have developed the electromagnetic seismic pulses computer recorder, and have applied for the national inventing patent (patent No.: CN1062040A).The frequency range that this electromagnetic seismic pulses registering instrument can write down is 0.01Hz～2kHz, and is merely able to the recording impulse number.A kind of " earthquake electromagnetic information receiver " disclosed among the Chinese patent CN2050174V, this receiver partly is made up of ground receiving system, underground receiving system, monitoring and timing circuit and register system etc., and it is by ground, underground to recently distinguishing electromagnetism precursor signal and ground undesired signal.Obviously, this system is too complicated, only is suitable for receiving the electromagnetic signal from extensive tectonic stress zone.European patent EP 0067924 discloses a kind of " method and apparatus that predicts an earthquake ", Chinese patent CN1032240A discloses a kind of " receiver of alternative electric information for premonition of earthquake ", above-mentioned two inventions are all to receive the short forecasting that seismic electrical signal carries out earthquake, and seismic electrical signal is a very complicated physical quantity, under the situation that lacks theory and experimental study its accuracy that predicts an earthquake be difficult to compellent.Chinese patent CN1051625A discloses a kind of " method and apparatus of receiving electromagnetic radiation before seism ", it be with the earthquake information antenna installation near the large-scale metallics surface the geofault, and the earthquake orientation detecting antenna is installed, the electromagnetic information correspondence of two groups of antenna trappings enters computing machine by filter rectification and detecting circuit through A/D analog to digital conversion passage and carries out data processing.
As seen, existing earthquake Research in electromagnetic radiation achievement mainly is at seismic field, test frequency is below the low frequency, mostly be ultralow frequency or very low frequency (VLF) greatly, only be suitable for the electromagnetic radiation that extensive rotation produced of Distance Test solid rock, be unsuitable for coal body and soft rock deformation fracture or on a small scale (with seismic facies than) strong deformation destroy electromagnetic radiation and closely test.The instrument of development is not forecast function yet, only can the receiving electromagnetic radiation signal.Also has an important disadvantages in addition, mechanism and the law characteristic and unclear that rock mass deformation is broken and produced electromagnetic radiation to stand under load exactly, and the application of electromagnetic radiation technology and equipment must be based upon on the basis that the generation mechanism and the rule of electromagnetic radiation are furtherd investigate.
In the last few years, coal petrography electromagnetic radiation characteristic and applied research aspect thereof had obtained bigger progress.The ELECTROMAGNETIC RADIATION SIGNATURE that patent of invention " method and the device of prediction gassiness coal petrography concrete disaster " produces during (ZL98111185.8) by the deformation fracture of noncontact monitoring stand under load coal and rock and (several minutes) Changing Pattern in short-term thereof, the outstanding danger with coal rock dynamic disaster such as rock burst of forecast coal and gas, its reflection be the instantaneous state in a certain stage in the coal rock dynamic disaster evolutionary process, do not realize real uninterrupted continuously monitoring and forecast, can not share the resource of KJ coal mine safety monitoring system.
Utility model patent " coal rock dynamic disaster electromagnetic radiation monitoring device " (patent No. is ZL 01 272808.X) can carry out continuous monitoring under the situation of external power supply, but can not connect with KJ series coal mine safety monitoring system, can not share the power supply and the transmission channel of safety monitoring system, realize that remote monitoring needs independent wiring and independent power supply, and a little less than forecasting that function.
With the real-time monitoring and prediction coal petrography of electromagnetic radiation method concrete on a small scale disaster (as coal and gas give prominence to, dam foundation unstability, landslide and rock burst etc.) development and evolution process and dangerous aspect thereof also do not have proven technique and device.
Summary of the invention
Technical matters: the purpose of this invention is to provide a kind of real time monitoring forecasting device of coal rock dynamic disaster and forecasting procedure, coal rock dynamic disasters such as this device and method can be given prominence to coal and gas, rock burst carry out accurate and effective, noncontact, orientation, regionality, uninterrupted, remote monitoring forecast continuously, can share KJ series coal mine safety monitoring system and (be called for short the KJ system, as KJ2000 coal mine safety monitoring system, KJ95 coal mine safety monitoring system etc.) power supply and resource such as transmission channel, installation and easy to operate, do not have influence to producing, expense is low.
Technical scheme: the real-time monitoring and prediction method of coal rock dynamic disaster mainly comprises following index:
A) receiving side signal formula: contactless, the regional reception.Contactless, regional, broadband, high sensitivity, directed electromagnetism receiving transducer be can adopt, broadband, high sensitivity boring receiving transducer also can be adopted.Boring probe is a capacitance probe that is processed into by metal tube, and being placed on boring need be coupled, and is not subjected to the interference of work mechanism and staff in the operation place.
B) signal processing mode: processing in real time, demonstration in real time, output in real time.
C) forecasting mode: real-time prediction.The method that adopts the critical value method to combine with the dynamic trend method is carried out real-time prediction to coal rock dynamic disaster danger.
Real time monitoring forecasting device of coal rock dynamic disaster is received by receiving transducer, signal and processor is formed.System's received signal frequency is 1kHz～1MHz, and the Sefe antiexplosion type by Single-chip Controlling, has functions such as parameter input, data acquisition, automatic recording storage, data presentation, early warning and telecommunication.
The key technical indexes of instrument
A) type of protection [of an electrical apparatus for explosive atmospheres: ExibI essential safe type;
B) received signal frequency: 1kHz～1MHz;
C) sensitivity: adjustable, 25mV～1 μ V can adapt to different coal and geologic condition;
D) recording mode: continuous, the processing automatically of monitor, output in real time, the automatic record of central computer;
E) mode of operation: monitor can be realized man-machine conversation by the guidance panel button, and the parameter that can import has:
Timing statistics length, output signal and output amplitude, output signal type, early warning critical value.
G) interface: four kinds of test result mode signal outputs, a kind of with the output of 485 signals, a kind of, a kind of, a kind of with the output of 200～1000Hz form, so that adapt to different monitoring system requirements with the output of 4～20mA signal with the output of 1～5mA form.Every kind of exportable two paths of signals of output form.
I) power supply: 18～9VDC can be powered by monitoring system;
J) test index: electromagnetic radiation intensity and pulse of electromagnetic radiation number, improved predicting reliability;
K) early warning criterion: critical value method and the early warning of dynamic trend method, predictablity rate height.
Real time monitoring forecasting device of coal rock dynamic disaster comprises the monitoring host computer be made up of prime amplifier, A/D converter, impact damper, CPU, program storage, data-carrier store, display, RS485 communication port, standard signal output circuit, keyboard and antenna, power supply, KJ system substation, KJ system centre machine; Wherein, antenna, prime amplifier, A/D converter, impact damper, CPU are connected in series in proper order; Data-carrier store, display, RS485 communication port, standard signal output circuit, keyboard meet CPU respectively; The output termination KJ system substation of standard signal output circuit, KJ system substation and KJ system centre machine join.
The real-time monitoring and prediction method of real time monitoring forecasting device of coal rock dynamic disaster is: will pop one's head in is that effective receive direction of antenna is aimed at tested regional center, and the distance of day line-spacing area to be monitored is less than 50 meters; The electromagnetic radiation information that receives is handled and record in real time, and its method of handling in real time is: send into A/D converter by the signal that antenna receives after prime amplifier amplifies, directly carry out mould/number conversion, and deposit buffer in; After buffer is filled with, read by CPU, statistics per second very big electromagnetic radiation value E and umber of pulse N calculate the mean value " Eavg " of electromagnetic radiation E in the T1 time or the mean value " Navg " of umber of pulse N then, deposit data-carrier store in, and show in real time and export to the monitoring system substation; When the mean value " Eavg " of electromagnetic radiation E or umber of pulse N surpass its corresponding early warning critical value, instrument gives the alarm; In KJ system centre machine, except that connecing above-mentioned critical value method forecast, also calculate the rising tendency of " Eavg " and " Navg ", as T2 when Eavg or Navg are continuous rising tendency and rate of growth Δ E or Δ N substantially and surpass the borderline increases rate n that is scheduled in the time, instrument gives the alarm.
Beneficial effect: adopted contactless receiving antenna among the present invention, realized real contactless continuous prediction, also can be equipped with other probe and monitor and forecast.Monitoring and prediction does not influence production, has saved a large amount of workloads and expense.The Prediction Parameters that the present invention proposes has two: electromagnetic radiation intensity and umber of pulse.Proving installation of the present invention is an essential safe type, can be used under the coal mine, and prediction coal and gas are outstanding, rock burst and top board slump etc., also can be used for the unstability of prediction landslide on the ground, earthquake and rock concrete construction.Proving installation of the present invention have data acquisition, data processing, data storage, can with functions such as monitoring system combined network communication, warning, when a certain parameter surpassed its critical value or meets the dynamic forecasting criterion, instrument or monitoring terminal software gave the alarm.Proving installation volume of the present invention is little, and installation and easy to operate, highly sensitive can realize the real-time continuous monitoring and prediction.The frequency of electromagnetic radiation of proving installation test of the present invention is 1kHz～1MHz, can carry out closely or remote prediction, and employed antenna is a directional receiving antenna.
The existing mine greatly of China belongs to has coal and gas to give prominence to and the rock burst mine.Outstanding except that bringing a large amount of casualties, also have a strong impact on the social benefit and the economic benefit in colliery.Projecting mine all drops into very big man power and material and carry out outburst prediction and control every year.
Outburst prediction is exactly to drop under the minimum situation, and is quick, easy, carry out prediction exactly, guarantees safety, makes mine produce maximum social benefit and economic benefit.
Electromagnetic radiation method prediction outburst hazard technology and necessary instrument make outburst prediction time saving and energy saving, need not to drill, and do not influence production, and the accuracy rate height can satisfy mentioned above principle and requirement.
This technology and necessary instrument also can be used for other coal rock dynamic disaster phenomenons such as the rock burst danger of prediction mine, top board stride, large-scale rock concrete construction unstability, also can be used for the research of material deformation failure mechanism such as rock concrete and process.
The advantage of electromagnetic radiation forecasting techniques and portable equipment and successful test, use and caused that other has coal and gas to give prominence to and innings ore deposit of coal rock dynamic disaster phenomenon such as impulsion pressure and mine safety worker's very big interest.After this technology and necessary instrument are tested and appraised, market and long-range promotion prospect widely will be arranged.
Description of drawings
Fig. 1 is the structural representation of real time monitoring forecasting device of coal rock dynamic disaster of the present invention.Wherein have: antenna 1, prime amplifier 2, A/D converter 3, impact damper 4, CPU5, program storage 6, data-carrier store 7, display 8, RS485 communication port 9, standard signal output circuit 10, keyboard 11, power supply 12, KJ system substation 13, KJ system centre machine 14, terminating machine 15,16.
Fig. 2 is that coal face electromagnetic radiation monitoring device of the present invention is arranged synoptic diagram.
Fig. 3 is the outstanding instance graph of real-time monitoring and prediction coal of electromagnetic radiation method of the present invention and gas.Electromagnetic radiation predicts the outcome and predicts the outcome consistent with conventional Forecasting Methodology.
Fig. 4 is the real-time monitoring and prediction rock burst of an electromagnetic radiation method of the present invention instance graph.Electromagnetic radiation predicts the outcome consistent with the actual result of manifesting.
Fig. 5 is that electromagnetic radiation data of the present invention is handled and real-time prediction process block diagram in real time.
Embodiment
Receiver of the present invention consists of the following components: central processing unit CPU 5, prime amplifier 2, A/D converter 3, clock circuit, standard signal output circuit 10, display 8 etc.Illustrated respectively below.
1) CPU (central processing unit)
CPU (central processing unit) of the present invention is selected the 80C196KB single-chip microcomputer of MCS-96 series for use, and clock frequency is selected 12MHz for use.Consider that native system mainly is a test data, do not carry out complicated data processing, so program storage selects for use the 27C128 of 16K byte can meet the demands.
According to designing requirement, native system can be transferred to the monitoring system substation to the data of test by 485 interfaces or standard output interface at any time, also can get up the data storage of test, is transferred to main frame after waiting until.So require the capacity of the random access memory in the system also should be enough big.Each test data is made up of three parts: maximal value, mean value, umber of pulse, every part is made up of 1 word, so each test data need take the storage space of 3 words.System can carry out continuous non-stop run by external power source.System stores 1 data p.s., per hour need store 3600 data, and 16 hours need 57600 data of storage.Considering to store some random test data in addition again, is 628512 chips of 512KB so data-carrier store is selected capacity for use.
2) prime amplifier 2
Signal preamplifier is mainly used in the signal that sensor is received and amplifies, the enlargement factor scalable of amplifier, and analog to digital converter conversion is directly sent in the output of amplifier.
3) A/D converter 3
In order to test the signal of upper frequency, analog to digital converter is selected the TLC876 chip for use.The sample frequency of this analog to digital converter can be up to 20MHz, 10 scale-of-two precision.The sample frequency of analog to digital converter is so high, and 0.05 microsecond just can be finished once conversion, exports data, and CPU can't in time handle these data.Therefore designed a working storage of forming by two 62256 random access memory in this part circuit.Address generator by 1 16 organically combines analog to digital converter and working storage.When the address of address generator output reached certain value, analog to digital converter stopped conversion, and the data that CPU begins to read in the working storage are handled.
4) clock circuit
Convenient when making meter, native system has been selected a real time clock circuit with good man-machine interface for use.This clock is a main circuit with real-time timepiece chip DS12887, and its clock accuracy height can carry out the setting of time by program, by liquid crystal display displays, and information such as exportable year, month, day, hour, min, second.Chip internal has lithium battery, does not connect the external power source continuously-running more than 10 years.
5) the standard signal output circuit 10
In order to be transferred to monitoring system to the data in real time of test, designed output interface circuit in the system.The 80C196KB single-chip microcomputer itself has the RS232 communication interface of Transistor-Transistor Logic level.The test result signal has four kinds of way of outputs, and is a kind of with the output of 485 signals, a kind of with the output of 1～5mA form, a kind of with the output of 4～20mA signal, a kind of with the output of 200～1000Hz form, so that adapt to different monitoring system requirements.Every kind of exportable two paths of signals of output form.These four kinds of signal output forms can adapt to different monitoring system at present, all can connect with the monitoring system substation by cable, can the data in real time of testing be transferred to monitoring center's computing machine, and then export to the monitoring terminal computing machine.
6) display
Display is selected the extremely low LCD of power consumption for use.For convenience and the saving program memory space of programming, and displaying contents is abundant, selects 16 characters of every row LCD of totally 2 row for use.Being connected by socket CH2 of display and mainboard finished.
7) power supply
This monitor is by external power source, the also power supply that can directly use Monitor Sub-Station of Less to provide, and operating voltage is 18～9VDC.LM7805 provides fixing+5V power supply by trifocal fixed power source voltage stabilizer, partly uses for digital circuit.LM317 provides+the 5V power supply by trifocal regulated power supply voltage stabilizer, uses for analog to digital converter, and its voltage lasting accuracy can satisfy the needs of A/D conversion fully.
8) other explanation
When the system power supply switch connection, CPU is reset, and this resets and makes some initialization of register, program start anew to carry out.Native system adopts better simply electrify restoration circuit, is made up of a resistance, a diode and an electric capacity.
For auditory tone cues is provided, designed hummer in the system.
The crystal oscillator that the present invention adopts external crystal-controlled oscillation and internal circuit to constitute, frequency is 12MHz.
Realize requirements such as measurement, communication, data query, function selecting for convenience, the present invention adopts 2 row * 2 row keyboards.Keyboard adopts and touches keyswitch, and its life-span is long, and is easy to use, realizes each keyswitch function by programming, and when keyswitch was pressed, the hummer in the system was just rung, and expression has key to press, and is used for prompting.
The inventive system comprises the monitoring host computer formed by prime amplifier 2, A/D converter 3, impact damper 4, CPU5, program storage 6, data-carrier store 7, display 8, RS485 communication port 9, standard signal output circuit 10, keyboard 11 and antenna 1, power supply 12, KJ system substation 13, KJ system centre machine 14; Wherein, antenna 1, prime amplifier 2, A/D converter 3, impact damper 4, CPU5 are connected in series in proper order; Data-carrier store 7, display 8, RS485 communication port 9, standard signal output circuit 10, keyboard 11 meet CPU5 respectively; The output termination KJ system substation 13 of standard signal output circuit 10, KJ system substation 13 joins with KJ system centre machine 14.
When using this prediction instrument prediction gassiness coal petrography concrete disaster dynamic phenomenon, the effective receive direction of antenna to be aimed at the predicted zone of coal petrography concrete, the axially parallel that makes antenna is in the outside surface of tested coal petrography concrete, and antenna places the center in tested zone, and fixes antenna.The distance in antenna and tested zone is easily the suitableeest less than 50 meters, decide on the size of area to be monitored, and the principle of determining is that the area to be monitored just is included in the opening direction of antenna.Work independently under the monitor situation that externally power supply is powered, also can be used as the operation of a sensor and KJ coal mine safety monitoring systems connection.By the corresponding software of exploitation is installed on monitoring center's computing machine and terminal computer, can realize real-time figure, table, data presentation to electromagnetic radiation data, also can carry out real-time judge by coal rock dynamic disaster dynamic forecasting criterion, make real-time dangerous forecast.
To pop one's head in and be connected with the monitor input end, the monitor output terminal is connected with the KJ safety monitoring system, after the energising, carry out man-machine conversation by the button on the dustproof and waterproof tactile keyboard, (parameters such as critical electromagnetic radiation intensity value E_BJZ and critical pulse numerical value of N _ BJZ) can be tested and real-time prediction by feeler switch for input enlargement factor FDBS, threshold value MXZ, timing statistics length T 1, early warning critical value.
The collection of signal, conversion, processing, storage, warning and output are finished automatically and continuously by monitor.The ELECTROMAGNETIC RADIATION SIGNATURE that receives by antenna 1 a little less than, can not directly handle, after prime amplifier 2 amplifies, send into A/D converter 3, directly carry out mould/number conversion, and deposit buffer 4 in.After buffer is filled with, read statistics per second very big electromagnetic radiation value E and umber of pulse N by CPU5.(the mean value Eavg of the electromagnetic radiation E in the time of T1 〉=1s) or the mean value Navg of umber of pulse N deposit data-carrier store 7 in, and show in real time and export to the monitoring system substation to calculate T1 then.When Eavg or N surpass its corresponding early warning critical value, instrument gives the alarm.In monitoring system center machine software, except that forecasting by above-mentioned critical value method, also calculate the rising tendency of Eavg and Navg, as T2 (T2＞T1, be generally more than or equal to 1 hour) when Eavg or Navg were continuous rising tendency and rate of growth Δ E (or Δ N) substantially and surpass predetermined critical value rate of growth n in the time, instrument gave the alarm.
Prediction criterion is:
| Do not have dangerous | Dangerous | |
| Critical value | E＜E_BJZ and N＜N_BJZ | E 〉=E_BJZ or N 〉=N_BJZ |
| Dynamic trend | And Δ N＜n Δ E＜n | Or Δ N 〉=n Δ E 〉=n |
Claims (2)
1, a kind of real time monitoring forecasting device of coal rock dynamic disaster is characterized in that: this device comprises the monitoring host computer be made up of prime amplifier (2), A/D converter (3), impact damper (4), CPU (5), program storage (6), data-carrier store (7), display (8), RS485 communication port (9), standard signal output circuit (10), keyboard (11) and antenna (1), power supply (12), KJ system substation (13), KJ system centre machine (14); Wherein, antenna (1), prime amplifier (2), A/D converter (3), impact damper (4), CPU (5) order are connected in series; Data-carrier store (7), display (8), RS485 communication port (9), standard signal output circuit (10), keyboard (11) meet CPU (5) respectively; Output termination KJ system's substation (13) of standard signal output circuit (10), KJ system substation (13) joins with KJ system centre machine (14).
2, a kind of real-time monitoring and prediction method of real time monitoring forecasting device of coal rock dynamic disaster as claimed in claim 1, it is characterized in that: will pop one's head in is that effective receive direction of antenna (1) is aimed at tested regional center, antenna (1) apart from the distance of area to be monitored less than 50 meters; The electromagnetic radiation information that receives is handled and record in real time, and its method of handling in real time is: send into A/D converter (3) by the signal that antenna (1) receives after prime amplifier (2) amplifies, directly carry out mould/number conversion, and deposit buffer (4) in; After buffer is filled with, read by CPU (5), statistics per second very big electromagnetic radiation value E and umber of pulse N, calculate the mean value " Eavg " of electromagnetic radiation E in the T1 time or the mean value " Navg " of umber of pulse N then, deposit data-carrier store (7) in, and show in real time and export to the monitoring system substation; When the mean value " Eavg " of electromagnetic radiation E or umber of pulse N surpass its corresponding early warning critical value, instrument gives the alarm; In KJ system centre machine (14), except that forecasting by above-mentioned critical value method, also calculate the rising tendency of " Eavg " and " Navg ", as T2 when Eavg or Navg are continuous rising tendency and rate of growth Δ E or Δ N substantially and surpass the critical value rate of growth n that is scheduled in the time, instrument gives the alarm.
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Application publication date: 20050525 Assignee: Xuzhou CUMT Dahuayang Communication Equipment Co., Ltd. Assignor: China University of Mining & Technology Contract record no.: 2010320000444 Denomination of invention: Real time monitoring forecasting device of coal rock dynamic disaster and forecasting method Granted publication date: 20061206 License type: Exclusive License Record date: 20100422 |