The removal of BHP Billiton’s Iron Briquetting plant in Boodarie, Western Australia. This landmark facility in the Pilbara region of Western Australia was one of BHP’s top 10 risks worldwide.
The project involved the demolition and removal of the briquetting and reactor structures together with the adjacent gas plant.
The briquette structure was demolished in two halves, with the top section removed first. A variety of preweakening cuts allowed an induced collapse to be initiated. Inertia was applied by 120t and 230t excavators working in tandem to move the structure beyond the point of no return so that gravity could take over. The lower section of the structure was then demolished utilising traditional mechanical methods.
The 104m high Reactor structure was preweakened with calculated and designed oxy cuts and explosives cutting and kicking charges were applied to induce a controlled collapse.
The gas plant structures were collapsed using cut and pull techniques allowing 230t and 120t excavators to pull the structures apart, working in combination with a smaller fleet excavators equipped with shear attachments.
The project was shortlisted as a finalist in the industrial demolition category in 2012 and 2013.