Patent ID: 11953430
Assignee: TECHNOLOGICAL RESOURCES PTY LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A method of mining comprising:
producing rock type classifying data for a rock body by:
scanning a mine bench face with a spectral sensor to obtain spectral data from the rock body at the bench face, said data comprising multiple spectra obtained from scanned regions of the rock body surface,
determining, by a processing system, for differing spectra within the multiple spectra a plurality of spectral ratios as indicators of differing rock types, the spectral ratios being derived from a comparison of the spectral data at different specific wavelength bands associated with diagnostic absorption features of the differing rock types, said comparison comprising dividing a sum of reflectance in a first wavelength band by a sum of reflectance in a second wavelength band,
comparing, by the processing system, the spectral ratios to a threshold ratio, the spectral ratios used for the comparing are based on the dividing of the sum of reflectance in the first wavelength band by the sum of reflectance in the second wavelength band, the threshold ratio predetermined to define spectral ratios indicative of an absorption feature associated with edge anomalies of at least one edge of a portion of the rock body, and
in response to a determination, based on the comparing, that the spectral ratios do not indicate an absorption feature associated with edge anomalies, classifying, by the processing system, one or more rock types present at the rock body surface based on the spectral ratios and generating rock type classifying data for the rock body based on the identifying.