CN110531415A - A kind of three-dimensional craven fault forward probe method influenced using wall rock loosening ring - Google Patents
A kind of three-dimensional craven fault forward probe method influenced using wall rock loosening ring Download PDFInfo
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- CN110531415A CN110531415A CN201910773665.9A CN201910773665A CN110531415A CN 110531415 A CN110531415 A CN 110531415A CN 201910773665 A CN201910773665 A CN 201910773665A CN 110531415 A CN110531415 A CN 110531415A
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- 239000011435 rock Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000523 sample Substances 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 36
- 238000003384 imaging method Methods 0.000 claims abstract description 5
- 238000013508 migration Methods 0.000 claims abstract description 4
- 230000005012 migration Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 description 3
- 238000003325 tomography Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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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
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
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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
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/50—Corrections or adjustments related to wave propagation
- G01V2210/51—Migration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/64—Geostructures, e.g. in 3D data cubes
- G01V2210/642—Faults
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Abstract
The invention discloses a kind of three-dimensional craven fault forward probe methods influenced using wall rock loosening ring, three-component geophone is placed on to the middle part of wall rock loosening ring, reflection Love type groove wave can be converted to Love type surface wave using wall rock loosening ring, and the Love type surface wave amplitude feeds back to seismic detector after capable of being received by three-component geophone more by force and is recorded, seismic detector uses existing prestack Fresnel beam offset method by the seismic signal migration imaging of the Love type surface wave according to the Love type surface wave of record, obtains craven fault in the position for meeting head on front eventually by image.It is construction is simple of the present invention, easy to use, front of meeting head on can be accurately detected with the presence or absence of craven fault and can determine that the position of craven fault, tunnel guidance is provided for the safety of subsequent coal road.
Description
Technical field
The present invention relates to a kind of coal mine forward probe method, specifically a kind of three-dimensional influenced using wall rock loosening ring is small disconnected
Layer forward probe method.
Background technique
It is counted according to Chinese coal Industry Association, has 2525 protrusions and geological structure phase in 3082 coal and gas prominents
It closes, ratio is up to 81.9%.And cause the geological structure of prominent accident the most typical with this kind of craven fault of craven fault.At present
Ball physics forward probe method is more, including seismic wave method class, electromagnetic method class and other classes.Seismic wave method optimum is to tomography
Construction carries out advanced prediction, wherein the most typical in channel wave survey method in underground coal mine.
The feasible values simulation test of craven fault achieves significant achievement in front of slot wave forward probe, is mainly reflected in:
Such as Yang Sitong, which is proposed, to be excited received Rayleigh type groove wave coal road craven fault forward probe method in roof and floor (coal road is small
Tomography Rayleigh type groove wave forward probe numerical simulation, 2012；High seam is super along bottom plate or top plate coal driving reflection slot wave
Preceding detection method, application number of invention patent 201711007670.6)；Jiang Jinpeng etc. (the TVSP forward probe method based on slot wave,
2018) slot wave study on advanced detection etc. is carried out using the Rayleigh type groove wave in vertical top plate direction by Three-dimensional simulation.
But the above-mentioned prior art, there are still certain shortcomings: 1. traditional reflective advanced detection technology for drop compared with major fault and
Apparent tomography reflecting interface significant effect, but effect is unobvious when forward probe craven fault；2. slot wave can be divided into Love type and
Rayleigh type groove wave, and the condition of Rayleigh slot wave excitation is more harsh, when country rock and coal seam parameter are unsatisfactory for
When Rayleigh slot wave shooting condition, useful signal can not be collected；3. practical coal roadway tunneling complex geologic conditions, in coal road week
It encloses there are relaxation zone influence, road, which is opened up, considers wall rock loosening ring influence (Lu Tuo, mine laneway surface wave-converted shear wave forward probe
Technical research, 2016), by avoiding interference of the relaxation zone to reflected body wave, to improve the accuracy of slot wave forward probe.
What in addition it considered is two dimensional cross-section, and practical surveying conditions are three-dimensional conditions, and roof and floor profile direction is country rock, in-plane
It is coal seam, section and in-plane relaxation zone have otherness, therefore two dimensional cross-section direction has limitation.Existing others method
In order to avoid influence of the wall rock loosening ring to reflection slot wave forward probe, by inciting somebody to action in coal road wall construction drill or anchor pole mode
Wave detector is arranged in wall rock loosening ring with exterior domain, and seismic wave received in this way can be effectively reduced without wall rock loosening ring to be enclosed
Influence of the rock relaxation zone to channel wave survey, but this mode implement it is extremely difficult, need deep drill and by wave detector depth
Multiple steps such as hole installation, therefore can not conveniently realize craven fault in front of slot wave forward probe.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of three-dimensional influenced using wall rock loosening ring is small disconnected
Layer forward probe method, it is construction is simple, easy to use, front of meeting head on can be accurately detected with the presence or absence of craven fault and can determine that
The position of craven fault provides guidance for the safety driving of subsequent coal road.
To achieve the goals above, the technical solution adopted by the present invention is that: it is a kind of using wall rock loosening ring influence three-dimensional
Craven fault forward probe method, specific steps are as follows:
A, in the central axes of the left side in tunnel or right side and close to meeting head on location arrangements one to impulse a little, then known to acquisition
The range of wall rock loosening ring；
B, multiple three points are arranged in rows in the wall rock loosening ring medium position of the left side in tunnel or right side by the way of drilling
Wave detector is measured, then each three-component geophone is connect with seismic detector, so that seismic detector is recorded each three-component geophone anti-
The seismic signal of feedback；
C, SH type seismic wave is excited using shear wave source in impulsing of determining of step A, met head on the small disconnected of front to coal road
Layer is detected；
D, the seismic signal of each three-component geophone Real-time Feedback is observed by seismic detector and is analyzed:
1. being balanced using road to subsequently received seismic signal after observing the Seismic Direct Wave signal of feedback
And after the pretreatment of road inner equilibrium, if not finding, amplitude is not less than the 1/3 of through wave-amplitude and is the seismic signal of lineups, really
Surely there is no craven faults in front investigative range of meeting head on；
2. being balanced using road to subsequently received seismic signal after observing the Seismic Direct Wave signal of feedback
And after the pretreatment of road inner equilibrium, if discovery amplitude is not less than the 1/3 of through wave-amplitude and is the seismic signal of lineups, to this
Seismic signal is analyzed, if the seismic signal linearly polarizes and has Dispersion Characteristics, it is determined that the seismic signal is Love
Type surface wave, so that it is determined that there are craven faults in front investigative range of meeting head on；
Determine that there are craven fault principles according to Love type surface wave are as follows: inventor studies discovery coal layer loosening circle and coal seam connects
Touching relationship and ground mulching layer cover that the contact relation on stratum is similar under, and the presence of coal layer loosening circle will lead to surface wave development.When
When Love slot wave reaches the interface in coal layer loosening circle and coal seam, in coal layer loosening circle and complete coal surface forms Love
Type surface wave, Love type wave energy focus primarily upon in coal layer loosening circle, and wherein relaxation zone medium position energy is most strong.
Therefore it can be formed in front of Love type groove wave direction and be transmitted in coal seam after SH type seimic wave propagation；If front of meeting head on is deposited
In craven fault, then Love type groove wave, which touches, will form reflection Love type groove wave after craven fault, reflection Love type groove wave return into
Enter and is converted to Love type surface wave in the lateral wall wall rock loosening ring of tunnel；If there is no craven faults in front of meeting head on, reflection cannot be formed
Love type groove involves the Love type surface wave of conversion；Therefore Love type surface wave is the characteristic wave that craven fault whether there is.In addition Love
Type surface wave shows as lineups after being received by three-component geophone in seismic detector record and has Dispersion Characteristics, and three points
The seismic signal of amount is linear polarization.
E, the step D seismic signal for being determined as Love type surface wave is carried out using known prestack Fresnel beam offset method
Then migration imaging obtains craven fault in the position for meeting head on front according to image.
Mainly seismic wave is influenced in the prior art to carry out valuation by wall rock loosening ring, to remove wall rock loosening ring to it
The influence of detection, or wave detector is avoided to the reception that wall rock loosening ring carries out seismic wave as far as possible, compared with prior art,
Wave detector is placed on the medium position of wall rock loosening ring by the present invention, can be converted reflection Love type groove wave using wall rock loosening ring
For Love type surface wave, and the Love type surface wave amplitude can be detected more by force and feed back to seismic detector after device receives and be recorded, ground
It shakes instrument and is deviated the seismic signal of the Love type surface wave using prestack Fresnel beam offset method according to the Love type surface wave of record
Imaging obtains craven fault in the position for meeting head on front eventually by image.It is construction is simple of the present invention, easy to use, it can be precisely
Detect front of meeting head on the presence or absence of craven fault and can determine that the position of craven fault, tunnel finger be provided for the safety of subsequent coal road
It leads.
Detailed description of the invention
Fig. 1 is the position layout diagram of three-component geophone in the present invention；
Fig. 2 is the top cross-sectional view of Fig. 1.
In figure: 1, tunnel, 2, three-component geophone, 3, wall rock loosening ring, 4, impulse a little, 5, meet head on, 6, craven fault.
Specific embodiment
The present invention will be further described below.
As shown, the right using Fig. 1 is described as front, specific steps of the invention are as follows:
A, it impulses a little in the central axes of the left side in tunnel 1 or right side and close to 5 location arrangements one of meeting head on, then known to acquisition
Wall rock loosening ring 3 range；
B, multiple three are arranged in rows in 3 medium position of wall rock loosening ring of the left side in tunnel 1 or right side by the way of drilling
Component wave detector 2 wave detector of tri- component receive capabilities of X, Y, Z (i.e. with), then by each three-component geophone 2 with
Seismic detector connection, makes seismic detector record the seismic signal that each three-component geophone 2 is fed back；
C, step A determine impulse a little 4 using shear wave source excite SH type seismic wave, to coal road meet head on front it is small break
Layer 6 is detected；The range in detection front is 80m~150m every time；
D, the seismic signal of each three-component geophone Real-time Feedback is observed by seismic detector and is analyzed:
1. being balanced using road to subsequently received seismic signal after observing the Seismic Direct Wave signal of feedback
And after the pretreatment of road inner equilibrium, if not finding, amplitude is not less than the 1/3 of through wave-amplitude and is the seismic signal of lineups, really
Surely craven fault 6 is not present in 5 front investigative ranges of meeting head on；
2. being balanced using road to subsequently received seismic signal after observing the Seismic Direct Wave signal of feedback
And after the pretreatment of road inner equilibrium, if discovery amplitude is not less than the 1/3 of through wave-amplitude and is the seismic signal of lineups, to this
Seismic signal is analyzed, if the seismic signal linearly polarizes and has Dispersion Characteristics, it is determined that the seismic signal is Love
Type surface wave, so that it is determined that there are craven faults 6 in front investigative range of meeting head on；
Determine that there are the principles of craven fault 6 according to Love type surface wave are as follows: inventor studies discovery coal layer loosening circle and coal seam
Contact relation and ground mulching layer cover that the contact relation on stratum is similar under, the presence of coal layer loosening circle will lead to surface wave hair
It educates.When Love slot wave reaches the interface of coal layer loosening circle and coal seam, in coal layer loosening circle and complete coal surface shape
At Love type surface wave, Love type wave energy is focused primarily upon in coal layer loosening circle, and wherein relaxation zone medium position energy is most strong.
Therefore it can be formed in front of Love type groove wave direction and be transmitted in coal seam after SH type seimic wave propagation；If front of meeting head on is deposited
In craven fault, then Love type groove wave, which touches, will form reflection Love type groove wave after craven fault, reflection Love type groove wave return into
Enter and is converted to Love type surface wave in the lateral wall wall rock loosening ring of tunnel；If there is no craven faults in front of meeting head on, reflection cannot be formed
Love type groove involves the Love type surface wave of conversion；Therefore Love type surface wave is the characteristic wave that craven fault whether there is.In addition Love
Type surface wave shows as lineups after being received by three-component geophone in seismic detector record and has Dispersion Characteristics, and three-component
Love type surface wave is linear polarization.
E, the step D seismic signal for being determined as Love type surface wave is carried out using known prestack Fresnel beam offset method
Then migration imaging obtains craven fault 6 in the position for meeting head on 5 fronts according to image.
Claims (1)
1. a kind of three-dimensional craven fault forward probe method influenced using wall rock loosening ring, which is characterized in that specific steps are as follows:
A, in the central axes of the left side in tunnel or right side and close to meeting head on location arrangements one to impulse a little；Then known country rock is obtained
The range of relaxation zone；
B, the wall rock loosening ring medium position using bore mode in the left side in tunnel or right side is arranged in rows multiple three component geophones
Then each three-component geophone is connect with seismic detector by device, seismic detector is made to record the ground of each three-component geophone feedback
Seismic wave signal；
C, a SH type seismic wave is excited using a shear wave source in impulsing of determining of step A, to coal road meet head on front craven fault into
Row detection；
D, the seismic signal of each three-component geophone Real-time Feedback is observed by seismic detector and is analyzed:
1. after observing the Seismic Direct Wave signal of feedback, balance and road using road to subsequently received seismic signal
After inner equilibrium pretreatment, if not finding, amplitude is not less than the 1/3 of through wave-amplitude and is the seismic signal of lineups, it is determined that meets
Craven fault is not present in the investigative range of head front；
2. after observing the Seismic Direct Wave signal of feedback, balance and road using road to subsequently received seismic signal
After inner equilibrium pretreatment, if discovery amplitude is not less than the 1/3 of through wave-amplitude and is the seismic signal of lineups, to the earthquake
Signal is analyzed, if the seismic signal linearly polarizes and has Dispersion Characteristics, it is determined that the seismic signal is Love type face
Wave, so that it is determined that there are craven faults in front investigative range of meeting head on；
E, migration imaging is carried out to the step D seismic signal for being determined as Love type surface wave using prestack Fresnel beam offset method,
Then obtain craven fault in the position for meeting head on front according to image.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113138418A (en) * | 2021-04-26 | 2021-07-20 | 中国石油大学(华东) | Elastic medium undulating surface Fresnel beam offset imaging method |
| CN113960669A (en) * | 2021-10-21 | 2022-01-21 | 中国石油化工股份有限公司 | Reflection information enhancement method and device based on common imaging point gather combination calculation |
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| CN113960669A (en) * | 2021-10-21 | 2022-01-21 | 中国石油化工股份有限公司 | Reflection information enhancement method and device based on common imaging point gather combination calculation |
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