OPTIMIZING THE RESOURCE MODEL OF LATERITE NICKEL DEPOSIT USING UNFOLDING TECHNIQUE
Mining industry is an industry that has a very high risk so that it needs to be carried out an exploration activities that can provide complete information about mineral resources or mining materials, distribution, concentration, shape deposit and geological conditions so that the planning and im...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/55753 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Mining industry is an industry that has a very high risk so that it needs to be
carried out an exploration activities that can provide complete information about
mineral resources or mining materials, distribution, concentration, shape deposit
and geological conditions so that the planning and implementation of mining
methods can work well. Nickel laterite deposit is strongly influenced by the
degree of weathering that causes the precipitate shape become irregular. This form
is expected to be modeled and analyzed using the unfolding method so that the
estimated data become more stationary when kriging method is conducted. One of
unfolding method is by affine transformation. This transformation can change the
surface of an irregular field into a flat plane, by determining connective points
(initial coordinates and the coordinates of the projection) on the surface. From the
connective points, the area of original surface in two-dimensional shapes can be
found. The shape is then estimated by kriging method for every 5 m depth. The
estimation results with unfolding techniques for Ni provide error variance value of
0.023 and for Fe 117.46, while the value of the error variance for folding
condition for Ni equal to 0.026 and for Fe 120. From these results, it can be
concluded that the estimation with unfolding technique gives better results. |
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