Determination of rock types by spectral scanning

Inactive Publication Date: 2012-12-06
TECHNOLOGICAL RESOURCES
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  • Abstract
  • Description
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Benefits of technology

[0004]According to one aspect, the invention provides a method of identifying rock types in a rock body, comprising scanning a surface of the rock body with a spectral sensor to obtain spectral data from the rock body surface, said spectral data comprising multiple spectra obtained from successively scanned re

Problems solved by technology

Analysis of such material can take many days which can delay the

Method used

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  • Determination of rock types by spectral scanning
  • Determination of rock types by spectral scanning
  • Determination of rock types by spectral scanning

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Embodiment Construction

[0032]To achieve an automated mine, a fast and objective method of assessing the geology of exposed mine faces is needed. One method described herein is the use of spectral data.

[0033]Reflectance and emittance spectroscopy techniques can be used to obtain information regarding the chemical composition of an object or material. An advantage of spectroscopy is that it can be used at close or far range.

[0034]One object that may be analysed by using spectroscopy is a rock body. While the variations in material composition often cause shifts in the position and shape of spectral features and the spectral features to be examined in an ore body can be quite complex, spectroscopy still has great potential to estimate and classify key geological properties such as rock type and / or ore grade.

[0035]Spectral data can be used to distinguish different rock types. Specific absorption features can be associated with certain minerals and can be used diagnostically to identify the minerals present. B...

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Abstract

Described herein is a method and system for classifying rock types in a rock body. The method comprises the steps of obtaining spectral data from a spectral measurement (202) of a surface region of the rock body and then determining a first spectral ratio between two wavelength bands of the spectral data. From the first spectral ratio it can be assessed (204) whether the measurement is a high-angle measurement, and if the measurement is not a high-angle measurement then a further spectral ratio between two further wavelength bands of the spectral data is determined (208). The further spectral ratio is then compared (210) with a corresponding diagnostic criterion to assess whether the surface region comprises a first rock type associated with the further spectral ratio and diagnostic criterion.

Description

FIELD OF THE INVENTION[0001]This invention relates to methods and apparatus for the determination of rock types occurring in rock bodies. Such determinations may be made during ore body exploration and surveys or during mining operations in a mine for ore grade assessment.BACKGROUND OF THE INVENTION[0002]In conventional pit-mining, ore grade assessments are made on the basis of sample material taken from spot locations. Analysis of such material can take many days which can delay the planning of blasting recovery and transport of the ore material. With developments in automated mining techniques there is a need for an improved method for accurately identifying mine geology.[0003]Reference to any prior art in the specification is not, and should not be taken as, an acknowledgment or any form of suggestion that this prior art forms part of the common general knowledge in Australia or any other jurisdiction or that this prior art could reasonably be expected to be ascertained, understo...

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Application Information

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IPC IPC(8): G01J3/42E21C41/00
CPCG01N21/3563G01N21/31
Inventor SILVERSIDES, KATHERINEMURPHY, RICHARDWYMAN, DEREK
Owner TECHNOLOGICAL RESOURCES
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