Geotechnical analysis and design of leaching Heap no. 2, Meydook Copper Mine, Iran

A. Mortazavi, Z. Abbasloo, L. Ebrahimi, A. Keshavarz, A. Masoomi

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

Abstract

Investigation and 3D analysis of Heap no. 2 of Meydook copper complex was the subject of this study. In this project all geological and geotechnical investigations conducted in the mine were evaluated aiming at determination of Heap no. 2 design parameters. The main objective of the project was to evaluate the potential for construction of Heap. No. 2 on a waste dump built in a valley in the north side of the pit. Considering the space limitation for dump location this was a viable alternative to reduce the costs associated with heap no. 2 construction. Moreover, it allowed for a significant reduction in overall mining costs. Considering the project condition, a 3D analysis of heap major structures including; valley rock foundation, waste dump, and low grade ore was carried out. Five sets of analyses were conducted and the displacement and stress fields were calculated within the heap no. 2 components. In all analyses conducted the subsident profile was determined for the valley base rock and heap foundation (waste dump). Moreover, the shear interaction between heap and waste dump was evaluated at the heap interface. The analyses results showed that the maximum settlement at the heap base is about 4-5 cm and the waste dump provides a safe and reliable base for heap construction. Moreover, the analysis results showed that the selected %5 grade for the heap interface is good and does not pose any risk in terms of heap Interface shear displacements. A sensitivity analysis of heap mechanical parameters was also conducted. The obtained results show that if the friction angle of heap material is reduced below 25 degree due to acid spraying process, the heap walls become unstable and the heap geometry must be redesigned.

Original languageEnglish
Title of host publication13th ISRM International Congress of Rock Mechanics
Editors Hassani, Hadjigeorgiou, Archibald
PublisherInternational Society for Rock Mechanics
ISBN (Electronic)9781926872254
Publication statusPublished - Jan 1 2015
Externally publishedYes
Event13th ISRM International Congress of Rock Mechanics 2015 - Montreal, Canada
Duration: May 10 2015May 13 2015

Publication series

Name13th ISRM International Congress of Rock Mechanics
Volume2015- MAY

Conference

Conference13th ISRM International Congress of Rock Mechanics 2015
CountryCanada
CityMontreal
Period5/10/155/13/15

Fingerprint

Copper mines
Iran
leaching
Leaching
copper
valleys
valley
grade
Rocks
rocks
shear
costs
ore grade
spraying
sensitivity analysis
Spraying
cost
rock
stress field
Ores

Keywords

  • 3D modelling
  • Heap design
  • Meydook mine
  • Stability analysis

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Mortazavi, A., Abbasloo, Z., Ebrahimi, L., Keshavarz, A., & Masoomi, A. (2015). Geotechnical analysis and design of leaching Heap no. 2, Meydook Copper Mine, Iran. In Hassani, Hadjigeorgiou, & Archibald (Eds.), 13th ISRM International Congress of Rock Mechanics (13th ISRM International Congress of Rock Mechanics; Vol. 2015- MAY). International Society for Rock Mechanics.

Geotechnical analysis and design of leaching Heap no. 2, Meydook Copper Mine, Iran. / Mortazavi, A.; Abbasloo, Z.; Ebrahimi, L.; Keshavarz, A.; Masoomi, A.

13th ISRM International Congress of Rock Mechanics. ed. / Hassani; Hadjigeorgiou; Archibald. International Society for Rock Mechanics, 2015. (13th ISRM International Congress of Rock Mechanics; Vol. 2015- MAY).

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

Mortazavi, A, Abbasloo, Z, Ebrahimi, L, Keshavarz, A & Masoomi, A 2015, Geotechnical analysis and design of leaching Heap no. 2, Meydook Copper Mine, Iran. in Hassani, Hadjigeorgiou & Archibald (eds), 13th ISRM International Congress of Rock Mechanics. 13th ISRM International Congress of Rock Mechanics, vol. 2015- MAY, International Society for Rock Mechanics, 13th ISRM International Congress of Rock Mechanics 2015, Montreal, Canada, 5/10/15.
Mortazavi A, Abbasloo Z, Ebrahimi L, Keshavarz A, Masoomi A. Geotechnical analysis and design of leaching Heap no. 2, Meydook Copper Mine, Iran. In Hassani, Hadjigeorgiou, Archibald, editors, 13th ISRM International Congress of Rock Mechanics. International Society for Rock Mechanics. 2015. (13th ISRM International Congress of Rock Mechanics).
Mortazavi, A. ; Abbasloo, Z. ; Ebrahimi, L. ; Keshavarz, A. ; Masoomi, A. / Geotechnical analysis and design of leaching Heap no. 2, Meydook Copper Mine, Iran. 13th ISRM International Congress of Rock Mechanics. editor / Hassani ; Hadjigeorgiou ; Archibald. International Society for Rock Mechanics, 2015. (13th ISRM International Congress of Rock Mechanics).
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