Ernest Henry Mining awarded best presentation at AusIMM conference
In August, Cloncurry hosted the Australasian Institute of Mining and Metallurgy's (AusIMM) North West Queensland Branch annual conference.
Employees from across our North West Queensland operations attended, with our people from Mount Isa Mines (MIM) and Ernest Henry Mining (EHM) presenting at the conference.
Mining Engineer James Bartlett and Senior Planning Engineer Peter Nichols from EHM were awarded best presentation for 'Going back to the future: escape way breakthrough case study and ore pass grizzly performance review'.
Escape ways are alternative exits from the mine, fitted with ladders and infrastructure fundamental for evacuation in an emergency.
They also serve a secondary purpose housing vital pipes and cables for power, or are used as fresh air access points.
A case study was done at EHM to determine the best methods for developing new escape ways on each new production level, maximising utility while minimising development costs.
The presentation also outlined how we improved the longevity of our grizzlies, the large steel grates that screen our larger pieces of rock that cause damage to the ore pass.
Pete Nichols, Senior Planning Engineer EHM says that our previous grizzly design was not adequately robust, becoming damaged to the point they were unusable.
"Damaged grizzlies create a safety risk, reduce production and are costly to rebuild. So we set about designing a grizzly that would match the life of the level," Pete says.
"After a review, we have implemented changes to the design that mean our grizzlies now last the service life of the level, reducing maintenance cost and reducing inefficient downtime."