Uncertainty quantification of rock quality designation at the Gazestan Phosphate deposit

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Several Geomechanical variables reflect the characteristics of the rock masses and in recent years have been considered as the Geometallurgical responses in mining industry. These variables are highly effective in the energy consumption and in further stages of mineral processing, impact the grinding circuit for throughput, metal recovery and reagent consumption in mineral processing system. For instance, rock quality designation not only (RQD) is a very popular parameter that is able to define the domains with excellent and poor qualities of rocks, but also can be used to predict relative throughput rates in SAG milling circuit. Geostatistical modelling of this regionalized variable by linear interpolation methods such as kriging and Inverse Distance Weighting (IDW) has a longstanding problem with smoothing effect and non-additivity constraint that leads to a systematic bias in the produced maps. On the contrary, non-linear geostatistical methodology can be employed instead. In this study, the multi-Gaussian kriging approach as a non-linear geostatistical technique is adopted for probabilistic domaining of RQD at unsampled locations through a phosphate deposit located in Iran. The resulting estimates are checked thoroughly and can be applicable for defining the probable area dominated by soft, moderate and hard rocks applicable for mine design and mineral processing plant optimization.
Original languageEnglish
Title of host publicationGeometallurgy Conference: Back to the Future 2018
Number of pages14
ISBN (Electronic)9781928410072
Publication statusPublished - Jun 14 2018
EventGeometallurgy Conference 2018:, Back to the Future Cape Town: ,(6-8 August 2018). The Southern African Institute of Mining and Metallurgy - South Africa, Cape Town, South Africa
Duration: Aug 6 2018Aug 8 2018


ConferenceGeometallurgy Conference 2018:, Back to the Future Cape Town
CountrySouth Africa
CityCape Town
Internet address


  • Geometalurgy
  • RQD
  • Rock properties

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