Geological strength evaluation method based on hyperspectral-digital coupling borehole imaging technology

Abstract

The invention provides a geologic strength evaluation method based on a hyperspectral-digital coupling borehole imaging technology, and the method comprises the steps: obtaining a hyperspectral picture and a borehole image of a carbonic rock core to be detected, and carrying out the preprocessing of the hyperspectral picture, so as to obtain a preprocessed hyperspectral image; acquiring a mineral spectrum library, and matching the preprocessed hyperspectral image with the mineral spectrum library to obtain mineral category information; obtaining a rock mass integrity index according to the drilling image; obtaining the carbonate mineral content according to the preprocessed hyperspectral image, and calculating a strength reduction coefficient according to the carbonate mineral content and the mineral category information; calculating a geological strength index according to the strength reduction coefficient and the rock mass integrity index; and evaluating the geological strength of the river bank slope carbonate rock according to the geological strength index. According to the method, the defects of a traditional GSI evaluation method can be avoided, the risk of slope rock mass instability is reduced, the evaluation precision is high, and data support is provided for prevention and treatment of geological disasters.

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