Ultra-long distance passive source geological forecasting method for drilling and blasting construction tunnel

Abstract

The invention relates to an ultra-long distance passive source geological forecasting method for a drilling and blasting construction tunnel, and belongs to the technical field of earthquake forecasting. A plurality of detectors are embedded in the left and right side walls of the tunnel, and the detectors are connected in series and connected to the data acquisition host; strong vibration generated by an explosive source during tunnel excavation is used as a detection source for geological forecast, and seismic reflection signals are collected during blasting; and identifying the delay time of millisecond blasting for the collected signals by using a Hilbert-Huang transform method, and respectively carrying out seismic source delay time elimination on the collected signals to obtain multi-shot reflection wave seismic signals without delay time. And processing the reflected signals, generating a seismic reflected wave energy diagram and a velocity distribution diagram, and accurately forecasting geological conditions in an effective range in front of the tunnel face by combining existing geological data. The ultra-long-distance detection is achieved, the purposes of simple structure and ingenious design are achieved, and the ultra-long-distance detection device has high practical value and popularization value.

Description

technical field [0001] The invention belongs to the technical field of earthquake prediction, and in particular relates to an ultra-long-distance passive source geological prediction method for drilling and blasting construction tunnels. Background technique [0002] Drilling and blasting construction with multi-arm rock drilling rigs has a larger footage per cycle of blasting operations than the traditional pneumatic pick drilling and blasting method. At the same time, the blasting accuracy is improved, and the amount of over- and under-excavation works is reduced. Although the construction cost increases, the overall improvement improved construction efficiency. In recent years, various new technological trends in the construction of domestic highway tunnels have been promoted more and more with the advancement of science and technology, and the mechanization and intelligence of construction. It is believed that multi-arm rock drilling rigs with higher precision control wi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an ultra-long-distance passive source geological prediction method for drilling and blasting construction tunnels, which is used to solve the technical problems in the above-mentioned prior art, such as: in the process of drilling and blasting construct...

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