A long-distance three-dimensional advanced geological prediction method for tunnels

Abstract

The invention discloses a long-distance three-dimensional advanced geological prediction method for a tunnel. The method comprises a step of arranging eight detectors on a tunnel face and dividing theeight detectors into two rows, wherein each row has four detectors, a step of arranging 10 artificial seismic source points on the tunnel face, wherein the 10 artificial seismic source points are divided into two rows, each row has five artificial seismic source points, the left and right sides of each detector are respectively provided with two artificial seismic source points, the distributionranges of the artificial seismic source points covers the distribution ranges of the detectors, and the artificial seismic source points are arranged on a seismic source pad, a step of connecting thedetectors in series and allowing the detectors and the detectors to connect to a 3D seismic data acquisition device, a step of allowing a hammer strikes the seismic source pad to generate seismic waves, a step of allowing the 3D seismic data acquisition device to collect and record reflected wave signals generated by artificial seismic wave propagation, a step of processing reflected signals to generate a seismic reflection wave characteristic map, and a step of analyzing the seismic reflection wave characteristic map and performing accurate advanced prediction of geological conditions in front and surrounding positions of tunnel construction. The method has strong pertinence, is convenient and easy to use, has strong adaptability and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of tunnel construction engineering, and in particular relates to a long-distance three-dimensional advanced geological prediction method for tunnels. Background technique [0002] Tunnel advanced geological prediction refers to the advanced prediction of surrounding rock lithology, stratum composition and groundwater conditions in front of and around the tunnel face during tunnel excavation. Mainly use geological, drilling, geophysical prospecting and other methods, combined with geological data, geological surveys inside and outside the cave, and results of the plain surface of the working face to predict the nature, location and scale of unfavorable geological bodies in front of the working face, provide guidance for further construction, and ensure the smoothness of construction. Safe and smooth. Accuracy, timeliness, and high efficiency are the current pursuit of geological forecasting. However, due to the limita...

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Problems solved by technology

[0005] In view of this, the present invention provides a long-distance three-dimensional advanced geological prediction method for tunnels, aiming at the problems of many interference waves, difficult filtering technology, low signal-to-noise ratio, serious distortion, poor prediction accuracy, and time-consuming and labor-intensive problems in the prior art. , which improves the quality of seismic wave reflection signals. It is a high signal-to-noise ratio, good fidelity effect, high prediction accuracy, labor-saving and time-saving, and easy-to-operate advanced geological prediction method for tunnels. The prediction distance can reach more than 200m

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