CN108121010A - Based on the united underground dead face slot wave forward probe method and system in hole lane - Google Patents
Based on the united underground dead face slot wave forward probe method and system in hole lane Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
- G01V1/48—Processing data
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Abstract
The present invention relates to a kind of slot wave forward probe method and system, belong to technical field of geophysical exploration, and in particular to one kind is based on the united underground dead face slot wave forward probe method and system in hole lane.The present invention utilizes the hole lane combined detection scheme that multi-component and multilevel geophone in deep hole and placement hole is beaten in two lateral wall vertical working direction of tunnel, the detection angle of reflection slot wave is effectively expanded, so as to front anomalous body, the particularly reflection slot wave image quality of the reflecting surface anomalous body vertical with tunnel improves dead face reflection slot wave forward probe precision.
Description
Technical field
The present invention relates to a kind of slot wave forward probe method and system, belong to technical field of geophysical exploration, specifically relate to
It is and a kind of based on the united underground dead face slot wave forward probe method and system in hole lane.
Background technology
Advanced detection technology for digging laneway front geological construction be a detection bad environments, technical difficulty it is big,
Detection accuracy requirement is high and requires the geological guarantee technologies of real-time.But this technology can not only prevent Gas Outburst, dash forward
The accidents such as water occur, moreover it is possible to geological information are provided for gas drainage under suction, advanced leting speeper, optimization tunneling program etc., so as to improve
Accelerate digging speed in the case of safety guarantee.
In the prior art, the real-time advanced detection technology using big gun pick as focus does not influence mining progress, while driving
It can complete the task of real-time forward probe.
But due to driving face narrow space, Hydrographic General Line of the prior art is limited to linearly so that receives
Wave field space wave number narrow limits, the bearing accuracy of reflection wave imaging is zero, so that slot wave image quality is poor, is influenced anti-
Penetrate slot wave forward probe precision.
The content of the invention
The slot wave image quality that the present invention is mainly solved present in the prior art is poor, reflects slot wave forward probe precision
The technical issues of low, provides a kind of based on the united underground dead face slot wave forward probe method and system in hole lane, the party
Method and system widen wavefield reception visual angle by via lane joint observation scheme, and use phase according to the wave field characteristics of gathered data
The noise-removed technology and imaging technique answered improve the precision of dead face channel wave seismic advanced prediction.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：
One kind is based on the united underground dead face slot wave forward probe method in hole lane, including：
Epicenter excitation step utilizes epicenter excitation signal at the tunnel place of meeting head on；
Wavefield reception step, be utilized respectively be installed on tunnel meet head on place two lateral wall lateral apertures in multiple holes in wave detector and
It is installed on the meet head on tunnel wave detector of two lateral wall of rear of tunnel and receives wave field caused by vibration signal；
Wave field processing step for handling the wave field received, is recorded into line displacement wave field using scattering imaging method
Imaging obtains slot wave forward probe imaging results；
Geologic interpretation step, explained on migration imaging section in front of dead face and around existing for suspicious geology it is different
Chang Ti, and determine its position, scale and type.
Preferably, above-mentioned one kind is based on the united underground dead face slot wave forward probe method in hole lane, the wave field
Processing step includes Signal Pretreatment sub-step, for being decayed using polarization filtering to the random noise in data record,
The signal-to-noise ratio that useful signal particularly reflects slot wave signal is improved, is specifically included：
(1) to the covariance matrix that three component seismic data is calculated in timing window：
(2) according to formula | Q- λ I |=0, eigenvalue λ is obtained1、λ2And λ3With corresponding feature vector V1、V2And V3；
(3) polarization coefficient is calculatedAnd utilize polarization coefficient structure
Build out Polarization filter
(4) Polarization filter is respectively acting on three components, just obtains filtered record, filtered record filters out
The wave field of low polarizability remains the wave field of high polarization degree.
(5) window when mobile, and repeat the above steps until record tail.
Preferably, above-mentioned one kind is based on the united underground dead face slot wave forward probe method in hole lane, the wave field
Processing step specifically includes slot wave compression sub-step, specially utilizes the multiple filtering technique high precision computation slot based on S-transformation
Wave number is composed according to frequency dispersion, is picked up frequency dispersion parameter in frequency dispersion spectrum, and with frequency dispersion parameter designing inverse dispersion wave filter, is then acted on slot
Ripple records, and realizes the compression to the slot wave wave train.
Preferably, above-mentioned one kind is based on the united underground dead face slot wave forward probe method in hole lane, the wave field
Processing step specifically includes modulation function and determines sub-step, for the spatial position according to shot point, receiving point to reflection point and
Spread speed parameter based on ray tracing technique, calculates Travel time t, is determined according to Travel time with the signal period
For the when window of unit, by window amplitude information during the three-component of reception, based on mathematical statistics means, particle polarization direction is calculated
With back wave directions of raysSpace angle θ, the polarization direction coefficient of the slot wave type used according to angle calculation imagingDetermine the modulation function of polarization offset imagingWherein α is given tuning parameter, when wave field is LOVE slots
During wave fieldIt is then if RayLeigh slot waves
Preferably, above-mentioned one kind is based on the united underground dead face slot wave forward probe method in hole lane, the wave field
Processing sub-step includes migration imaging sub-step, specially acts on record using modulation function, obtains polarization filtering signal
X'(t)=X (t) * F (t), then using scattering imaging method to recording X'(t) migration imaging is carried out, it is advanced to obtain final slot wave
Detection imaging result.
One kind is based on the united underground dead face slot wave forward probe system in hole lane, including：
Big gun digs focus, meets head on to locate positioned at tunnel, for exciting vibration signal；
Wave detector in hole is installed on the tunnel place of meeting head on both sides and helps in lateral aperture, each more than two holes of lateral aperture installation
Middle wave detector, for receiving wave field caused by vibration signal；
Tunnel wave detector is set along meet head on rear two lateral wall of tunnel, along composition two is mutually parallel, is shaken for receiving
Wave field caused by dynamic signal；
Signal processing apparatus for handling the wave field received, is recorded into line displacement wave field using scattering imaging method
Imaging, explained on migration imaging section in front of dead face and around existing for suspicious geological anomalous body, and determine its position
It puts, scale and type.
Preferably, above-mentioned one kind is based on the united underground dead face slot wave forward probe system in hole lane, in the hole
Wave detector 10 meters of settings of spacing in lateral aperture, 6 grades or more three-component geophones are laid per hole.
Preferably, above-mentioned one kind is based on the united underground dead face slot wave forward probe system in hole lane, the tunnel
10 meters of settings of geophone separation, every survey line set 24 or more three-component geophones.
Therefore, compared with prior art, the present invention, which utilizes, beats deep hole and placement hole in two lateral wall vertical working direction of tunnel
The hole lane combined detection scheme of middle multi-component and multilevel geophone has effectively expanded the detection angle of reflection slot wave, so as to abnormal to front
The reflection slot wave image quality of body, particularly the reflecting surface anomalous body vertical with tunnel improves dead face reflection slot wave and surpasses
Preceding detection accuracy.
Description of the drawings
Attached drawing 1 is the observation system structure diagram of the present invention；
Attached drawing 2 is the tunnel geophone signal processing schematic diagram of the present invention.
Attached drawing 3 is geophone signal processing schematic diagram in hole of the invention.
Attached drawing 4 be the present invention tunnel wave detector and hole in wave detector the Effect on Detecting of the tomography perpendicular to tunnel is compared
Figure.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment：
The observation system of the united underground coal mine dead face slot wave forward probe of the present embodiment according to Fig. 1 based on well
Mode designs.
The signal that focal point is excited using dynamite source during big gun pick first is as excitaton source, therefore the usual position of shot point
It meets head on to locate in tunnel；Tunnel receiving point is distributed in tunnel and meets head on 5 meters of rears, and two lateral walls respectively lay two surveys line, and every distribution is more
A three-component receiving point (it is recommended that at least 24, preferably to identify wave field), at intervals of 10 meters；It meets head in tunnel two at 5 meters
Side is each to make a call to the lateral aperture that a depth is more than 60 meters, and 10 meters of detector interval in hole lays 6 grades of three-component geophones per hole；
Then three-component geophone with from note formula in-seam seismograph is connected using data line, is excited when receiving big gun pick
Direct wave caused by the vibration signal gone out, refracted wave, back wave when running into anomalous geologic body around and other wave fields；
Decayed using polarization filtering to the random noise in data record, improve useful signal and particularly reflect slot wave
The signal-to-noise ratio of signal, specific algorithm are：
1. to the covariance matrix that three component seismic data is calculated in timing window：
Wherein, the covariance matrix formed when Q is in window：(Xi,Yi,Zi) for when window in tri- components of X, Y and Z sampling point,For when window in sampling point average amplitude value.
2. according to formula | Q- λ I |=0, eigenvalue λ is obtained1、λ2And λ3With corresponding feature vector V1、V2And V3；
3. calculate polarization coefficientAnd utilize polarization coefficient structure
Build out Polarization filter
4. Polarization filter is respectively acting on three components, filtered record is just obtained, filtered record filters out
The wave field of low polarizability remains the wave field of high polarization degree.
5. window when moving, and repeat the above steps until record tail.
Then the multiple filtering technique high precision computation slot wave data frequency dispersion based on S-transformation is utilized to compose, is picked up in frequency dispersion spectrum
It takes frequency dispersion parameter, and with frequency dispersion parameter designing inverse dispersion wave filter, then acts on slot wave record, realize the pressure to the slot wave wave train
Contracting；
According to shot point, the spatial position of receiving point to reflection point and spread speed parameter, based on ray tracing technique, meter
Travel time t is calculated, the when window in units of the signal period is determined according to Travel time, passes through window during the three-component of reception
Amplitude information based on mathematical statistics means, calculates particle polarization direction(the corresponding feature vector of maximum eigenvalue) and reflection
Wave ray directionSpace angle θ (such as Fig. 2 and Fig. 3), the polarization direction of the slot wave type used according to angle calculation imaging
CoefficientDetermine the modulation function of polarization offset imaging, such as following formula：
Wherein α is given tuning parameter.When wave field is LOVE slot wave wave fields
It is then if RayLeigh slot waves
Record is acted on using modulation function, obtains polarization filtering signal X'(t)=X (t) * F (t), then using scattering
Imaging method is to recording X'(t) migration imaging is carried out, obtain final slot wave forward probe imaging results；
By geologic interpretation, explained on migration imaging section in front of dead face and around existing for suspicious geology it is different
Chang Ti, and determine its position, scale and type.
Compared with prior art, the present invention is multistage in deep hole and placement hole using being beaten in two lateral wall vertical working direction of tunnel
The hole lane combined detection scheme of wave detector has effectively expanded the detection angle of reflection slot wave, so as to front anomalous body, especially
It is the reflection slot wave image quality of the reflecting surface anomalous body vertical with tunnel and areas imaging (as shown in Figure 4), improves only head
Slot wave forward probe precision is reflected in tunnel.
Claims (8)
1. one kind is based on the united underground dead face slot wave forward probe method in hole lane, which is characterized in that including：
Epicenter excitation step utilizes epicenter excitation signal at the tunnel place of meeting head on；
Wavefield reception step is utilized respectively and is installed on wave detector and installation in multiple holes that tunnel is met head in two lateral wall lateral apertures of place
In tunnel, the meet head on tunnel wave detector of two lateral wall of rear receives wave field caused by vibration signal；
Wave field processing step for handling the wave field received, records wave field using scattering imaging method and carries out migration imaging,
Obtain slot wave forward probe imaging results；
Geologic interpretation step, explained on migration imaging section in front of dead face and around existing for suspicious geologic anomaly
Body, and determine its position, scale and type.
2. it is according to claim 1 a kind of based on the united underground dead face slot wave forward probe method in hole lane, it is special
Sign is, the wave field processing step includes Signal Pretreatment sub-step, for using polarization filtering in data record with
Machine noise is decayed, and is improved the signal-to-noise ratio that useful signal particularly reflects slot wave signal, is specifically included：
(1) to the covariance matrix that three component seismic data is calculated in timing window：
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(2) according to formula | Q- λ I |=0, eigenvalue λ is obtained1、λ2And λ3With corresponding feature vector V1、V2And V3；
(3) polarization coefficient is calculatedAnd it is constructed using polarization coefficient
Polarization filter
(4) Polarization filter is respectively acting on three components, just obtains filtered record, filtered record has filtered out low
The wave field of polarizability remains the wave field of high polarization degree.
(5) window when mobile, and repeat the above steps until record tail.
3. it is according to claim 1 a kind of based on the united underground dead face slot wave forward probe method in hole lane, it is special
Sign is that the wave field processing step specifically includes slot wave compression sub-step, specially utilizes the multiple filtering skill based on S-transformation
Art high precision computation slot wave data frequency dispersion is composed, and frequency dispersion parameter is picked up in frequency dispersion spectrum, and is filtered with frequency dispersion parameter designing inverse dispersion
Then device acts on slot wave record, realizes the compression to the slot wave wave train.
4. it is according to claim 1 a kind of based on the united underground dead face slot wave forward probe method in hole lane, it is special
Sign is that the wave field processing step specifically includes modulation function and determines sub-step, for according to shot point, receiving point to reflection
The spatial position of point and spread speed parameter, based on ray tracing technique, calculate Travel time t, according to Travel time
It determines when window in units of the signal period, by window amplitude information during the three-component of reception, based on mathematical statistics means, calculates
Particle polarization directionWith back wave directions of raysSpace angle θ, the slot wave type used according to angle calculation imaging
Polarization direction coefficientDetermine the modulation function of polarization offset imagingWherein α is given tuning parameter, when
When wave field is LOVE slot wave wave fieldsIt is then if RayLeigh slot waves
5. it is according to claim 1 a kind of based on the united underground dead face slot wave forward probe method in hole lane, it is special
Sign is that the wave field processing sub-step includes migration imaging sub-step, specially acts on record using modulation function, obtains
To polarization filtering signal X'(t)=X (t) * F (t), then using scattering imaging method to recording X'(t) and migration imaging is carried out, it obtains
Obtain final slot wave forward probe imaging results.
6. one kind is based on the united underground dead face slot wave forward probe system in hole lane, which is characterized in that including：
Big gun digs focus, meets head on to locate positioned at tunnel, for exciting vibration signal；
Wave detector in hole is installed on the tunnel place of meeting head on both sides and helps in lateral aperture, each lateral aperture installation two or more Kong Zhongjian
Ripple device, for receiving wave field caused by vibration signal；
Tunnel wave detector is set along meet head on rear two lateral wall of tunnel, along composition two is mutually parallel, for receiving vibrations letter
Wave field caused by number；
Signal processing apparatus for handling the wave field received, records wave field using scattering imaging method and carries out migration imaging,
Explained on migration imaging section in front of dead face and around existing for suspicious geological anomalous body, and determine its position, rule
Mould and type.
7. it is according to claim 6 a kind of based on the united underground dead face slot wave forward probe system in hole lane, it is special
Sign is that wave detector 10 meters of settings of spacing in lateral aperture, 6 grades or more three-component geophones are laid per hole in the hole.
8. it is according to claim 6 a kind of based on the united underground dead face slot wave forward probe system in hole lane, it is special
Sign is that described 10 meters of settings of tunnel geophone separation, every survey line sets 24 or more three-component geophones.
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| CN111399030A (en) * | 2020-02-29 | 2020-07-10 | 山西晋煤集团技术研究院有限责任公司 | Mine roadway slot wave distributed advanced detection system and method |
| CN113075730A (en) * | 2021-03-23 | 2021-07-06 | 西安中地博睿探测科技有限公司 | Travel time information automatic extraction method in transmission channel wave velocity CT imaging |
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| CN108693561A (en) * | 2018-06-14 | 2018-10-23 | 中煤科工集团西安研究院有限公司 | The coal mining seismic acquisition system and method for array are segmented based on wave detector |
| CN111399030A (en) * | 2020-02-29 | 2020-07-10 | 山西晋煤集团技术研究院有限责任公司 | Mine roadway slot wave distributed advanced detection system and method |
| CN113075730A (en) * | 2021-03-23 | 2021-07-06 | 西安中地博睿探测科技有限公司 | Travel time information automatic extraction method in transmission channel wave velocity CT imaging |
| CN113075730B (en) * | 2021-03-23 | 2024-05-28 | 西安中地博睿探测科技有限公司 | Automatic extraction method of travel time information in transmission channel wave speed CT imaging |
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