CHARACTERIZATION OF METAL GRADES IN A STOCKPILE OF AN IRON MINE (CASE STUDY- CHOGHART IRON MINE, IRAN)
Journal Title: UNKNOWN - Year 2018, Vol 33, Issue 2
Abstract
In any mining operation due to the cut-off grade (economic criteria), materials classify into the ore and waste. The material with grade equal to or higher than the cut-off grade is considered as ore and the material with grade less than the cut-off grade is transported as wastes to the waste dumps. However, because of increasing metal demand, depleting of in situ ore reserves and so the reduction of cut-off grades for many metals, the mentioned waste dumps were considered as valuable ore reserves named stockpiles. In this paper, multivariate geostatistics was used to estimate the iron grades of two stockpiles following the sequential of piling procedures from the main source - the ore deposit - to the piling field. One stockpile is characterized by phosphorous concentration ((P %) > 0.6 %), while the other by iron concentration ((Fe %)< 50%). Since economic and physical constraints made sampling physically and economically problematic, the grade distribution and variability were estimated on the basis of primary blast-hole data from the main ore body and the mine’s long-term planning policy. A geostatistical model was applied to the excavated part of the iron deposit and the stockpile, by reconstructing ore selection, haulage and piling method. Results were validated through spatial variability of iron and phosphorous concentrations by comparing grade variability (Fe and P) with mining and pilling units. This methodology allows characterizing the iron grades within stockpiles without any extra sampling.
Authors and Affiliations
Sara Kasmaee, Francesco Tinti, Roberto Bruno
HRVATSKI RJEČNIK ODABRANIH GEOSTATISTIČKIH POJMOVA
Modeli i interpretacije temeljene na geostatističkim metodama često se rade pomoću računalnih programa. Stoga su primjena i razvoj geostatistike usko vezani s razvojem informatike i računarstva. Pri tomu treba uvijek poz...
Sadašnje spoznaje o ispitivanju vlačne čvrstoće stijena uporabom brazilskoga testa
Vlačna čvrstoća u mehanici stijena svojstvo je koje se znatno češće određuje indirektno (neizravno) nego direktno (izravno). U ovome radu prikazan je povijesni pregled razvoja indirektne metode ispitivanja zvane brazils...
POVIJEST ISTRAŽIVANJA I EKSPLOATACIJE BITUMINOZNIH KEROGENIH NALAZIŠTA HRVATSKE
Najstarija ležišta prirodnog bitumena, odnosno asfalta, u primorskoj Hrvntskoj, pretpostavlja se da su bila eksploatirana već u srednjem vijeku. Sigurni pisani dokumenti o Vinišću kod Trogira potječu iz 1628., a o vrgora...
HYDROGEOLOGICAL AND HYDROGEOCHEMICAL CHARACTERISTICS OF A WIDER AREA OF THE REGIONAL WELL FIELD EASTERN SLAVONIA – SIKIREVCI
This paper establishes hydrogeological and hydrogeochemical characteristics of a wider area of the regional well field Eastern Slavonia - Sikirevci. The research was conducted based on data gathered from the area of the...
CROATIAN SPE STUDENT CHAPTER
Brief review of Chapter's activities throughout Academic Year is given in this Article. By introducing new ways of activities this Academic Year, number of members has greatly increased which will help to develop Chapter...