Geological detection method and system based on blower gun seismic source
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A detection method, air gun technology, applied in seismic survey, geophysical survey, seismology, etc., can solve problems such as occupying a large time and space and affecting the tunnel construction process
Pending Publication Date: 2021-08-27
SHANDONG UNIV +2
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The traditional geological prediction method needs to excite the seismic source separately, and the drilling and blasting t
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Embodiment 1
[0032] This embodiment provides a geological detection method based on an air gun source, including:
[0033] S1: Build a measuring network at a certain distance from the face, and set measuring points for drilling on the measuring network;
[0034] S2: Obtain the seismic wave signal generated by the wind gun at the measuring point as the excitation source, and use the inversion imaging model to perform advanced geological prediction based on the seismic wave signal, and obtain the positioning result of the bad geological body;
[0035] S3: Obtain the working parameters of the air gun drilling process, and use the classification model based on the working parameters to obtain the classification result of the surrounding rock;
[0036] S4: Control the tunnel construction process based on the positioning results of unfavorable geological bodies and the classification results of surrounding rocks.
[0037] In the step S1, as figure 1 As shown in Fig. 1, firstly, the layout of t...
Embodiment 2
[0052] This embodiment provides a geological detection system based on an air gun source, including:
[0053] The seismic wave signal acquisition device is used to collect the seismic wave signal generated by the air gun as the excitation source through the pilot detector arranged on the air gun and the three-component detector arranged at the measuring point on the survey network;
[0054] The air gun state acquisition device is used to collect the working parameters of the air gun during the drilling process;
[0055] The processor is configured to use the inversion imaging model to perform advanced geological prediction based on the seismic wave signal, obtain the location result of the unfavorable geological body, and obtain the classification result of the surrounding rock based on the working parameters by using the classification model;
[0056] The controller is configured to control the tunnel construction process based on the bad geological body positioning result an...
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Abstract
The invention discloses a geological detection method and system based on a blower gun seismic source. The method comprises the steps of: building a measurement network at a position which is a certain distance away from a tunnel face, and setting a measurement point for drilling on the measurement network; acquiring a seismic wave signal generated by a blower gun as an excitation source at the measurement point, and performing advanced geological forecast by adopting an inversion imaging model based on the seismic wave signal to obtain an unfavorable geologic body positioning result; acquiring working parameters of the blower gun in the drilling process, and obtaining a surrounding rock grading result based on the working parameters through a classification model; and controlling the tunnel construction process based on the unfavorable geologic body positioning result and the surrounding rock grading result. A blower gun is used as an excitation source for advanced geological forecast, and an inversion imaging model is repeatedly corrected through seismic wave signals, so that fine detection of unfavorable geology of the tunnel is realized; and meanwhile, the working parameters of the blower gun in the drilling process are collected, automatic grading of the surrounding rock is achieved based on a support vector machine algorithm, and finally tunnel construction is effectively guided according to geological detection results in the two aspects.
Description
technical field [0001] The invention relates to the technical field of advanced tunnel detection and surrounding rock classification, in particular to a geological detection method and system based on an air gun source. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] At present, the market share of air guns in the drilling and blasting tunnel construction process is still far ahead, and more than 70% of the tunnels use air guns as drilling equipment. When drilling blastholes, often more than 10 wind guns work at the same time, and a large number of source signals generated are often eliminated as noise signals, turning passive into active. Making full use of these drilling source signals will serve tunnel construction as a new idea . Advanced geological prediction of tunnels is a necessary link in tunnel construction, and scientific and ...
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