A Review - Pillar Stability Issues at DOZ Block Cave Mine

摘要

PT Freeport's Deep Ore Zone (DOZ)Mine is the latest block cave minernwithin the East Ertsberg Skarn System (EESS).Issues with undercuttingrnand stress concentrations at the extraction level were experienced,leadingrnto reduced pillar strength.The extraction level-related issues becamernmore pronounced,leading to local panel drift collapse,in an area that wasrnover 100 per cent extraction.rnA review of ground conditions,panel collapse descriptions,and factorsrncontributing to panel collapse are presented in this paper.