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Method and device for detecting caves using sound pressure imaging between holes

An imaging device and technology for karst caves, which are applied to detection methods and devices, and use inter-hole sound pressure imaging to detect karst caves, can solve the problems of not very obvious delay of sound wave time and unsatisfactory effects, and achieve simple structure, long service life, Adjustable energy effect

Active Publication Date: 2016-01-20
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

[0002]At present, seismic wave and acoustic wave tomography, which are widely used in geological exploration, are carried out by using the length of time that seismic wave or sound wave propagates in the formation, that is, the speed of propagation Inversion imaging, but because the underground is three-dimensional, and the surrounding rock of the cave is hard limestone, the sound wave ray does not directly pass through the cave, but propagates forward around the hard cave wall. The time delay is not very obvious, and such a small time difference is also affected by the accuracy of the measuring device. Therefore, the existing technology of using acoustic imaging to detect caves is not ideal when used

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  • Method and device for detecting caves using sound pressure imaging between holes
  • Method and device for detecting caves using sound pressure imaging between holes
  • Method and device for detecting caves using sound pressure imaging between holes

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but not as a basis for any limitation of the present invention.

[0020] Embodiments of the present invention, a method for detecting caves by sound pressure imaging between holes of the present invention is to use sound pressure to detect caves; the specific method is to drill two holes with a distance of 10 to 50 meters around the caves, and scan The device scans the acoustic wave waveform and sound pressure data between the two holes, input the sound wave waveform and sound pressure data into the imaging device for imaging inversion, and obtain the acoustic structure image map of the cave in the scanned area, so as to determine the position of the cave in the detected area, size. For the two holes with a distance of 10-50 meters, the hole depth is greater than the hole distance. The scanning is that the transmitting head connected to the...

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Abstract

The invention discloses a method and a device for detecting karst caves by using inter-hole sound pressure imaging. This method uses sound pressure to detect caves; the specific method is to drill two 10 ～ 50 Meter holes, the sound wave waveform and sound pressure data between the two holes are scanned by the scanning device, the sound wave waveform and sound pressure data are input into the imaging device for imaging inversion, and the acoustic structure image map of the cave in the scanned area is obtained, so as to determine the detected The location and size of caves in the area. The present invention uses sound pressure imaging to detect karst caves, and since the sound pressure without karst caves is several times that of those with karst caves, it has a very good effect.

Description

technical field [0001] The invention relates to a detection method and a device, in particular to a method and a device for detecting karst caves by using sound pressure imaging between holes, and belongs to the technical field of geological surveying. Background technique [0002] At present, seismic wave and acoustic wave tomography, which are widely used in geological exploration, use the length of time that seismic waves or sound waves propagate in the formation, that is, the speed of propagation speed to perform inversion imaging. The surrounding rock is hard limestone, and the sound wave rays do not pass directly through the cave, but travel around the hard cave wall. Therefore, practice has proved that the delay of the sound wave time by the cave is not very obvious, and such a small time difference is still measured. Therefore, the existing technology of using acoustic wave imaging to detect caves is not ideal when used. Contents of the invention [0003] The obje...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/00
Inventor 王波
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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