CN103837897A - Method for finely detecting slot waves of underground coal mine - Google Patents
Method for finely detecting slot waves of underground coal mine Download PDFInfo
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- CN103837897A CN103837897A CN201310674241.XA CN201310674241A CN103837897A CN 103837897 A CN103837897 A CN 103837897A CN 201310674241 A CN201310674241 A CN 201310674241A CN 103837897 A CN103837897 A CN 103837897A
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Abstract
The invention provides a method for finely detecting slot waves of an underground coal mine and studies of propagation characteristics. A controllable spread-spectrum focus or vibration source is adopted, elastic waves or electromagnetic waves are transmitted to coal series rock stratums, a multi-mode correlation receiving method is adopted, accurate travel time sequences of the waves are obtained to describe wave field characteristics of the slot waves, information of propagation mode changes and propagation frequency changes of the slot waves in the propagation process is adopted for finely detecting geological structures, dying processing is carried out on obtained graphs or images through the information, and the fine structure of the rock stratums is accordingly obtained. Compared with other underground detecting technologies, the method has the advantages that the controllable focus or vibration source is adopted for modulating exploration information into sending waves; the correlation receiving and frequency dispersion analysis method is adopted for extracting multi-wave propagation image information of the geologic structure. The method for finely detecting the slot waves of the underground coal mine is more accurate and reliable in surveying.
Description
Technical field
The present invention relates to information and geophysics field, special design the research of the meticulous detection method of slot wave and its propagation characteristic under a kind of coal mine.
Background technology
As far back as nineteen fifty-five, F. F. Ai Weixun has just found the SEISMIC CHANNEL WAVE METHOD in coal seam, and slot wave has been done to proactive affirming for the possibility of mining industry.Henceforth, the Research Literature based on geology detecting wave field characteristics in hypocenter of the explosion tunnel starts a large amount of appearance, but is subject to the restriction of technical merit, and document mainly concentrates on the wave field research that utilizes single source or Plane wave source to excite generation in tunnel.At present, conventional technology utilizes multiple wave detectors to detect under same or multiple focus conditions exactly, and the wave field characteristics of elastic wave, utilizes computing machine to carry out geologic structure inverting, draws geologic feature image and the parameter of exploration context.But seldom take the explication de texte of the multiple routes of transmission of elastic wave into account because of said method, in the time that little tectonic structure is explored, precision is lower.
Summary of the invention
The object of the invention is to design the meticulous detection method of slot wave under a kind of coal mine.Adopt the direct sequence spread spectrum modulating wave of process pre-emphasis processing as surveying carrier wave, utilize down-hole type be coupled P wave-wave transducer (loudspeaker) or antenna transmitted signal; Utilize down-hole type and be coupled P ripple and S ripple wave detector (acoustic pickup) or antenna reception returns or the slot wave of transmission, to signal carry out multipath separation, multimode separates and relevant peaks processing, carries out the analysis of slot wave wave field characteristics according to the relevant peaks sequence obtaining; Utilize wave field characteristics inverting to obtain the picture rich in detail of coal measure strata.
According to the research of the meticulous detection method of slot wave and its propagation characteristic under coal mine of the present invention, it is characterized in that:
(1) the spread spectrum ripple that uses vibroseis or vibration source to produce after pre-emphasis carries out down-hole slot wave detection.Utilize the component in each transmission path in the meticulous separation echo of correlation reception method or transmitted wave, understand fully the meticulous process that ripple is propagated in coal measures rock stratum, the multipath component that utilization obtains carrys out the different architectonic wave field characteristics of fine description, thereby carries out the resolution of fine geology structure.
(2) in down-hole is surveyed, adopt multimode reception technique, and distinguish different medium to the wave frequency in propagating and communication mode impact in conjunction with the frequency dispersion theory of slot wave.According to the shape of the frequency dispersion obtaining and mode profile parametric inversion structure, and judge the medium character of constructing.
(3), based on the passing through the architectonic while of computing machine inverting of spread spectrum vibroseis or vibration source, the image or the figure that utilize the frequency dispersion that obtains and mode profile parameter to obtain inverting dye.
Accompanying drawing explanation
By can further understanding all types of target of the present invention, feature and advantage below in conjunction with accompanying drawing to the detailed description of embodiment of the present invention.
Fig. 1 is the block diagram of transmission beam method channel wave survey system of the present invention.
Fig. 2 is the block diagram of reflectometry channel wave survey system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Fig. 1 shows the composition frame chart of transmission beam method channel wave survey system of the present invention.After band spectrum modulation, adopt single carrier list spread spectrum code word single source detection method through the information code of meticulous selection, modulating wave is coupled into coal measure strata.When propagating in stratum, modulated by different tectonic structures carrier wave.The each component signal of multipath slot wave in the transmitted wave that utilization receives; Computing machine, as core cell, has to survey and controls, records the functions such as ripple and data analysis.Utilize correlation reception technology, adopt continuous sliding window, each pattern slot wave signal data and spread spectrum random series that computing machine is recorded utilize correlation filter group to carry out related operation, obtain the time series of walking of corresponding different mode ripple respectively, and frequency spectrum in analytic signal.With the method, record slot wave and in coal seam and other coal measure stratas, propagate the transmission mode of postwave, path and frequency dispersion distribution.Utilize computing machine to carry out inversion imaging, the geological structure parameters that obtains being explored.
Fig. 2 shows the composition frame chart of reflectometry channel wave survey system of the present invention.Select specific For Spread Spectrum Sequences and center frequency point, adopt single carrier list spread spectrum code word single source detection method, modulating wave is coupled into coal measure strata.When propagating in stratum, modulated by different tectonic structures carrier wave.The each component signal of reflection wave multipath slot wave that utilization receives; Computing machine, as core cell, has to survey and controls, records the functions such as ripple and data analysis.Utilize correlation reception technology, adopt continuous sliding window, each pattern slot wave signal data and spread spectrum random series that computing machine is recorded utilize correlation filter group to carry out related operation, obtain the time series of walking of corresponding different mode ripple respectively, and frequency spectrum in analytic signal.With the method, record slot wave and in coal seam and other coal measure stratas, propagate the transmission mode of postwave, path and frequency dispersion distribution.Utilize computing machine to carry out inversion imaging, the geological structure parameters that obtains being explored.
Claims (6)
1. a research for the meticulous detection method of slot wave and propagation characteristic under coal mine, comprises following step:
(1) adopt the selected direct sequence spread spectrum modulating wave of process pre-emphasis processing as surveying carrier wave; And
(2) the detection carrier wave obtaining according to above-mentioned steps (1), is coupled to this carrier wave on the stratum that needs exploration; And
(3) signal sending according to above-mentioned steps (2), receives transmitted wave or reflection slot wave after different tectonic structure modulation; And
(4) receive according to above-mentioned steps (3) slot wave returning, utilize correlation reception technology, signal is carried out to carrier wave dispersion analysis, multi-spread path separation, the separation of many communication modes and relevant peaks analysis, carry out the analysis of slot wave wave field characteristics according to the relevant peaks sequence obtaining; And
(5) analysis of the analysis to slot wave wave field characteristics and carrier wave frequency dispersion according to above-mentioned steps (4), utilizes computing machine inverting to generate geologic image and utilizes frequency dispersion and mode parameter dyeing, obtains architectonic coloured image.
2. the meticulous detection method of slot wave under coal mine according to claim 1, it is characterized in that: in described step (1) and (2), select specific For Spread Spectrum Sequences and center frequency point, obtain the direct sequence spread spectrum modulation elastic wave of pre-emphasis processing, adopt the vibroseis survey method of single carrier list spread spectrum code word point.
3. the meticulous detection method of slot wave under coal mine according to claim 1, it is characterized in that: in described step (2) and (3), utilize correlation reception technology, adopt continuous sliding window, each pattern slot wave signal data and spread spectrum random series that computing machine is recorded utilize correlation filter group to carry out related operation, obtain the time series of walking of different travel paths and communication mode.
4. the meticulous detection method of slot wave under coal mine according to claim 1, it is characterized in that: in described step (1), (2) and (3), by spectrum analysis, obtain the power division of carrier wave under different mode is propagated and the information of carrier frequency change after tectonic structure modulation.
5. record slot wave and in coal seam and other coal measure stratas, propagate transmission mode, path and the frequency dispersion distribution parameter of back reflection or transmitted wave.
6. the meticulous detection method of slot wave under coal mine according to claim 1, is characterized in that: in described step (4) and (5), according to analysis result, utilize computing machine to carry out inverting, obtain being detected the architectonic coloured image of coal measure strata.
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| CN104678437A (en) * | 2015-03-18 | 2015-06-03 | 河南理工大学 | Mine channel wave signal wave-field separation method |
| CN106526673A (en) * | 2016-11-10 | 2017-03-22 | 淮南矿业(集团)有限责任公司 | Fault testing method for reflection method channel wave seismic exploration roadway advanced detection |
| CN106680868A (en) * | 2017-01-05 | 2017-05-17 | 南京君诺鑫成网络科技有限公司 | In-seam seismic multi-attribute parameter tomographic method |
| CN109633736A (en) * | 2018-12-24 | 2019-04-16 | 山东科技大学 | A kind of elastic wave phase control emission is against syntesis receiving method |
| CN110501749A (en) * | 2019-07-17 | 2019-11-26 | 山东科技大学 | A kind of slot wave signal multipath spectral analysis method and system |
| CN110850471A (en) * | 2019-10-18 | 2020-02-28 | 中国矿业大学 | Method for converting SH wave detection washband based on shock wave excitation seismic source |
| CN112987095A (en) * | 2021-02-25 | 2021-06-18 | 中国科学院地理科学与资源研究所 | Geological fault detection method and device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678437A (en) * | 2015-03-18 | 2015-06-03 | 河南理工大学 | Mine channel wave signal wave-field separation method |
| CN106526673A (en) * | 2016-11-10 | 2017-03-22 | 淮南矿业(集团)有限责任公司 | Fault testing method for reflection method channel wave seismic exploration roadway advanced detection |
| CN106526673B (en) * | 2016-11-10 | 2018-06-08 | 淮南矿业(集团)有限责任公司 | A kind of bounce technique seam seismic exploration Roadway Leading Prospecting tomography test method |
| CN106680868A (en) * | 2017-01-05 | 2017-05-17 | 南京君诺鑫成网络科技有限公司 | In-seam seismic multi-attribute parameter tomographic method |
| CN106680868B (en) * | 2017-01-05 | 2019-01-15 | 南京君诺鑫成网络科技有限公司 | A kind of more property parameters chromatography methods of channel wave seismic |
| CN109633736A (en) * | 2018-12-24 | 2019-04-16 | 山东科技大学 | A kind of elastic wave phase control emission is against syntesis receiving method |
| CN109633736B (en) * | 2018-12-24 | 2022-01-25 | 山东科技大学 | Elastic wave phase-controlled transmitting inverse synthesis receiving method |
| CN110501749A (en) * | 2019-07-17 | 2019-11-26 | 山东科技大学 | A kind of slot wave signal multipath spectral analysis method and system |
| CN110850471A (en) * | 2019-10-18 | 2020-02-28 | 中国矿业大学 | Method for converting SH wave detection washband based on shock wave excitation seismic source |
| CN110850471B (en) * | 2019-10-18 | 2021-07-02 | 中国矿业大学 | Method for converting SH wave detection washband based on shock wave excitation seismic source |
| CN112987095A (en) * | 2021-02-25 | 2021-06-18 | 中国科学院地理科学与资源研究所 | Geological fault detection method and device |
| CN112987095B (en) * | 2021-02-25 | 2021-10-15 | 中国科学院地理科学与资源研究所 | Geological fault detection method and device |
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