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- W4205441019 abstract "The quality of rock aggregate depends on the lithological variations present in the rock deposit. This study aims at establishing a link between the variability of rock properties and the sampling interval necessary to map these variations adequately. The usefulness of geostatistical methods for in-situ sampling optimization with regard to quarrying for rock construction materials and aggregates is examined as well. For this purpose, a rock face in a quarry was surveyed in detail. Variations in rock properties were recorded using an impact tester, the equotip. The equotip measurements were analyzed using different measures for spatial continuity. Semivariogram models to describe the spatial continuity were developed. The semivariograms revealed that the variation in the quarry is anisotropic with high variability in the vertical and low variability in the horizontal direction. Using block kriging, reliable estimates for the rock properties at unsampled locations were obtained. On this basis different geotechnical units were identified. The error analysis provided a good indication of the variability and sampling reliability. Based on the experience gained during the study, a methodology for in situ sampling optimization is proposed that makes it possible to reduce the amount of sampling necessary in quarry exploration and exploitation. With the geostatistical methods available, there is no reason to neglect insitu testing for quality control during quarry exploitation." @default.
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- W4205441019 date "1997-04-01" @default.
- W4205441019 modified "2023-09-28" @default.
- W4205441019 title "Progressive failure analysis of highwalls in oil sand mines" @default.
- W4205441019 doi "https://doi.org/10.1016/s0148-9062(97)00208-8" @default.
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