Forensic Assessment of Historic Waste Rock Storages for Large Base Metal Mine, Queensland, Australia

Okane undertook investigation of three waste rock storages associated with a large base metal mine where the construction details were unknown to the current mine operators.

Data were collected for every year of the mine life, totaling more than 15 years. Assessment of the data included using spatial analysis and mine planning software packages to build a detailed model of each storage facility that defined and quantified the distribution of reactive sulfidic and benign waste rock. This information was used to enhance closure planning and define final earthworks to contain and mitigate leachate from reactive waste rocks.