CN113391344A - Coral reef area karst cave detection system and method - Google Patents
Coral reef area karst cave detection system and method Download PDFInfo
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- CN113391344A CN113391344A CN202110890928.1A CN202110890928A CN113391344A CN 113391344 A CN113391344 A CN 113391344A CN 202110890928 A CN202110890928 A CN 202110890928A CN 113391344 A CN113391344 A CN 113391344A
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- 235000014653 Carica parviflora Nutrition 0.000 title claims abstract description 53
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 10
- 244000132059 Carica parviflora Species 0.000 title description 2
- 241000243321 Cnidaria Species 0.000 claims abstract description 51
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000001228 spectrum Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 12
- 239000000523 sample Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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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
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
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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
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
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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. analysis, for interpretation, for correction
- G01V1/30—Analysis
- G01V1/306—Analysis for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles
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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
- G01V2210/62—Physical property of subsurface
- G01V2210/624—Reservoir parameters
Abstract
The invention discloses a coral reef area karst cave detection system and a coral reef area karst cave detection method, wherein a micro-motion detection technology is adopted, a circular array receiving array is formed by 7 self-contained intelligent detectors, a natural vibration surface wave is received, Rayleigh surface wave dispersion characteristics are extracted from micro-motion information, a transverse wave speed of a stratum is obtained by inverting a dispersion curve and an H/V curve, a stratum structure is deduced, and an underground karst cave of a coral reef area is identified; the frequency dispersion curve extraction is to take the micromotion as a stable random process in time and space, measure the micromotion data by using a circular array and calculate a spatial autocorrelation coefficient so as to obtain a surface wave frequency dispersion curve; and the H/V curve extraction is to calculate a power spectrum by the micromotion time domain signal and calculate the horizontal and vertical amplitude ratio corresponding to each frequency in a frequency domain. The invention has the advantages of rich stratum information, high precision, large detection depth, high detection efficiency, strong anti-interference capability, no need of a seismic source, low cost and simple operation.
Description
Technical Field
The invention relates to the technical field of underground stratum structure investigation, coral reef area underground cavern detection and poor geologic body detection, in particular to a coral reef area cavern detection system and a coral reef area cavern detection method.
Background
At present, a general investigation means for investigating the underground cavern in the coral reef area adopts geological drilling detection and geological radar detection, the geological drilling detection is an original detection technology, the geological drilling belongs to point measurement, holes are distributed on a positioning point for drilling, drilling downwards is carried out, if the underground cavern (cavern) is met, a drill rod drops, the underground cavern is found, the underground cavern (cavern) is not found within the drilling design depth, and the drilling is carried out after the position is changed, so that the blindness of the method for detecting the underground cavern in the coral reef area is high, the efficiency is low, and the cost is high; the geological radar detection is that equipment is moved on a distributed survey line for detection, electromagnetic pulse signals are emitted underground under a seismic source of the geological radar, a receiver receives signals reflected by a reflection interface or a geologic body, a stratum section is formed through data processing, and the karst cave distribution condition is identified on the section.
In conclusion, the invention designs a coral reef area karst cave detection system and a coral reef area karst cave detection method.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a coral reef area karst cave detection system and a coral reef area karst cave detection method.
In order to achieve the purpose, the invention is realized by the following technical scheme: a coral reef area karst cave detection system comprises self-contained intelligent detectors, seven self-contained intelligent detectors 1 form a circular array receiving array, and the circular array receiving array consists of a self-contained intelligent detector placed in the center of a circle and self-contained intelligent detectors placed on six vertexes of a regular hexagon inscribed with the circle; the detector probe is arranged on the self-contained intelligent detector, is inserted into a surface layer deposition layer of the coral reef area and receives a vibration signal; a coral reef layer in the coral reef area is arranged below the surface layer deposition layer in the coral reef area, and a coral reef area cave is formed in the coral reef layer in the coral reef area; the circular array receiving array moves along the measuring line.
A coral reef area karst cave detection method comprises the following steps: a micro-motion detection technology (passive surface wave exploration) is adopted, a circular array receiving array is formed by 7 self-contained intelligent detectors, natural vibration (passive) surface waves are received, Rayleigh surface wave frequency dispersion characteristics are extracted from micro-motion information, a frequency dispersion curve and an H/V curve are inverted, the transverse wave speed of a stratum is obtained, the stratum structure is deduced, and the underground karst cave of a coral reef area is identified. The frequency dispersion curve extraction is to take the micromotion as a stable random process in time and space, measure the micromotion data by using a circular array and calculate a spatial autocorrelation coefficient so as to obtain a surface wave frequency dispersion curve; and the H/V curve extraction is to calculate a power spectrum by the micromotion time domain signal and calculate the horizontal and vertical amplitude ratio corresponding to each frequency in a frequency domain.
The self-contained intelligent detector is equipment for receiving vibration signals, is internally provided with a lithium battery and a memory card, records the received vibration signals according to time periods, has a GPS positioning function, can continuously work for 25 days, can set a sampling rate, has a volume of about 10cm by 15cm by 20cm, independently works during operation, does not need electric wire connection, and is mature equipment at present.
The invention has the beneficial effects that: the invention has the advantages of rich stratum information, high precision, large detection depth, high detection efficiency, strong anti-interference capability, no need of a seismic source, low cost and simple operation.
Drawings
The invention is described in detail below with reference to the drawings and the detailed description;
FIG. 1 is a schematic diagram of the array, the layout of the measuring lines and the measuring moving direction of the array according to the present invention;
FIG. 2 is a schematic diagram of the operation of the self-contained intelligent detector of the present invention;
FIG. 3 is a schematic diagram of the arrangement of detectors and the stratum structure of coral reef area;
FIG. 4 is a schematic diagram of the working process of the coral reef area stratum data acquisition of the present invention;
FIG. 5 is a flow chart of data collection, processing and interpretation of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1 to 5, the following technical solutions are adopted in the present embodiment: a coral reef area karst cave detection system comprises a self-contained intelligent detector 1, seven self-contained intelligent detectors 1 form a circular array receiving array 3, and the circular array receiving array 3 consists of a self-contained intelligent detector 1 placed in the center of a circle and self-contained intelligent detectors 1 placed on six vertexes of a regular hexagon 8 inscribed with a circle; the detector probe 1-1 is arranged on the self-contained intelligent detector 1, and the detector probe 1-1 is inserted into a surface sedimentary layer 5 of a coral reef area to receive a vibration signal 2; a coral reef layer 6 in the coral reef area is arranged below the surface layer deposition layer 5 in the coral reef area, and a coral reef area cave 7 is arranged in the coral reef layer 6 in the coral reef area; the circular array receiving array 3 moves along the line 4.
A coral reef area karst cave detection method comprises the following steps: a micro-motion detection technology (passive surface wave exploration) is adopted, a circular array receiving array is formed by 7 self-contained intelligent detectors, natural vibration (passive) surface waves are received, Rayleigh surface wave frequency dispersion characteristics are extracted from micro-motion information, a frequency dispersion curve and an H/V curve are inverted, the transverse wave speed of a stratum is obtained, the stratum structure is deduced, and the underground karst cave of a coral reef area is identified. The frequency dispersion curve extraction is to take the micromotion as a stable random process in time and space, measure the micromotion data by using a circular array and calculate a spatial autocorrelation coefficient so as to obtain a surface wave frequency dispersion curve; and the H/V curve extraction is to calculate a power spectrum by the micromotion time domain signal and calculate the horizontal and vertical amplitude ratio corresponding to each frequency in a frequency domain.
The construction drawing of the embodiment is finished indoors, measuring lines are arranged in a target area of a coral reef area, the number of the measuring lines is determined according to the size of the target area, the distance between the measuring lines is 10m, the moving distance of a circular platform array is 10m, the observation radius of the platform array is 3m, measuring points (coinciding with the position of a detector at the circle center) are arranged on a side line, the distance between the measuring points is 10m, namely the moving distance of the array, and coordinates of each measuring line and coordinates of each measuring point are determined on the construction drawing.
During field construction of the specific embodiment, GPS navigation positioning is carried out, a circular array is arranged in a target area, the circular array is composed of 1 detector placed in the circle center and 6 detectors placed on the vertexes of a regular hexagon inscribed with a circle, probes of the detectors are inserted into surface sediments, two observation systems of a regular six deformation type and a regular triangle type are formed, the distance from the vertexes of the regular six deformation type to the circle center is an observation radius, the detectors automatically receive natural vibration surface waves during data acquisition, each observation point detects the geological structure of the array coverage surface below the array through the circular observation array arranged on the earth surface of a coral reef area, the geological structure comprises a coral reef area underground cavern and the like, observation of one observation point is finished, the observation point moves to the next observation point in the direction of a measuring line, and the operation is repeated until observation of all the observation points is finished. After the data acquisition is finished, the data is exported from the detector, and the data is processed and interpreted to form a graph.
The specific implementation mode adopts a micro-motion detection technology, utilizes self-contained intelligent detectors to form an array receiving array, and receives the underground stratum structure covered by a passive surface wave detection array.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A coral reef area karst cave detection system is characterized by comprising self-contained intelligent detectors (1), seven self-contained intelligent detectors (1) form a circular array receiving array (3), and the circular array receiving array (3) consists of a self-contained intelligent detector (1) placed in the center of a circle and self-contained intelligent detectors (1) placed on six vertexes of a regular hexagon (8) inscribed with the circle; the detector probe (1-1) is arranged on the self-contained intelligent detector (1), and the detector probe (1-1) is inserted into a surface deposition layer (5) of the coral reef area to receive a vibration signal (2); a coral reef layer (6) in the coral reef area is arranged below the surface layer deposition layer (5) in the coral reef area, and a coral reef area cave (7) is arranged in the coral reef layer (6) in the coral reef area; the circular array receiving array (3) moves along the measuring line (4).
2. A coral reef area karst cave detection method is characterized by comprising the following steps: adopting a micro-motion detection technology, forming a circular array receiving array by 7 self-contained intelligent detectors, receiving a natural vibration surface wave, extracting Rayleigh surface wave frequency dispersion characteristics from micro-motion information, inverting a frequency dispersion curve and an H/V curve to obtain the transverse wave speed of a stratum, deducing the stratum structure, and identifying the underground karst cave of a coral reef area; the frequency dispersion curve extraction is to take the micromotion as a stable random process in time and space, measure the micromotion data by using a circular array and calculate a spatial autocorrelation coefficient so as to obtain a surface wave frequency dispersion curve; and the H/V curve extraction is to calculate a power spectrum by the micromotion time domain signal and calculate the horizontal and vertical amplitude ratio corresponding to each frequency in a frequency domain.
3. The coral reef area cave detecting method as claimed in claim 2, wherein the construction drawing is done indoors, the survey lines are laid in the target area of the coral reef area, the number of the survey lines is determined according to the size of the target area, the distance between the survey lines is 10m, the moving distance of the circular array is 10m, the observation radius of the array is 3m, the survey points are laid on the side line coinciding with the position of the detector at the center of the circle, the distance between the survey points is 10m, namely the moving distance of the array, and the coordinates of each survey line and the coordinates of each survey point are determined on the construction drawing.
4. The method of claim 2, wherein during construction, GPS navigation and positioning are performed, a circular array is distributed in a target area, the circular array is composed of 1 detector placed in the center of a circle and detectors placed on 6 vertexes of a regular hexagon inscribed with the circle, probes of the detectors are inserted into surface sediments, therefore, two observation systems of the regular hexagonal deformation and the regular triangle are formed, the distance from the vertex of the regular hexagonal deformation to the circle center is the observation radius, when data are collected, the detector automatically receives natural vibration surface waves, each observation point detects a geological structure under a first coverage surface of the array through a circular observation array arranged on the surface of the coral reef area, the geological structure comprises an underground karst cave of the coral reef area, one observation point finishes observation, the detector moves to the next observation point according to the direction of a measuring line, and the operation is repeated until all the observation points finish observation; after the data acquisition is finished, the data is exported from the detector, and the data is processed and interpreted to form a graph.
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| CN202110890928.1A CN113391344A (en) | 2021-08-04 | 2021-08-04 | Coral reef area karst cave detection system and method |
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| CN202110890928.1A CN113391344A (en) | 2021-08-04 | 2021-08-04 | Coral reef area karst cave detection system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113900145A (en) * | 2021-09-30 | 2022-01-07 | 福建省交通规划设计院有限公司 | Method and device for estimating underground transverse wave velocity distribution based on micro-motion signals |
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- 2021-08-04 CN CN202110890928.1A patent/CN113391344A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113900145A (en) * | 2021-09-30 | 2022-01-07 | 福建省交通规划设计院有限公司 | Method and device for estimating underground transverse wave velocity distribution based on micro-motion signals |
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