Patent ID: 11933713
Assignee: SHANDONG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A determining method for the weathering resistant capability of clastic rocks in a tunnel based on feldspar features, comprising the following steps:
collecting in advance clastic rock samples, surface clastic rock samples, and oil field or coal field drilling core samples in the early stage of tunnel excavation, obtaining image features, element features, microscopic features, crystal features and mineral features and the like of the samples, and completing the training of a model by using the determination criteria of different weathering grades;
randomly collecting block samples and powder samples on a tunnel face during TBM shutdown, scanning the tunnel face in omni-directions to obtain image information, and analyzing element types in the samples;
building a model through neural network learning according to the extracted images including cleavage features, interference color features, relief features, and crystal structure features, repeatedly comparing with existing data to finally obtain the cleavage type, interference color features, relief features and the like and crystal structure features of feldspar for classifying a weathering resistant grade of a single feature;
quantitatively obtaining main types of minerals in the samples, combining mineral quantitative analysis results, element analysis data and image data to obtain the type and content of feldspar in rocks through the neural network pre-learning model for classifying the weathering resistant grade of the single feature, and giving basic lithology features of the rock; and
integrating all the above information, carrying out classification through an embedded weathering resistant degree classification model, and outputting final prediction results.