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Company: Centennial Coal – Newstan Colliery
Summary: Maintenance or relocation on the longwall machine requires the isolation, via a simple ball valve, of the incoming hydraulic supply. An incident occurred at Newstan Colliery due to the failure of seals on the ball valve which then caused unintentional re-pressurisation of the hydraulic supply. An integrated valve system was engineered which limits exposure to high pressure fluid system components in the event of failure. This valve system allows for: the isolation and restoration of pressure by a sequenced key system; the pressure to be re-applied to the system at a controlled rate; and for the dissipation of pressure at the isolation points, which prevent damage to valve components.
Award Status: Finalist and Overall Winner, 2009 OHS Innovation Awards
Contact Details: Peter Ryan, Safety Officer, Ph: (02) 4956-0240, peter.ryan@centennialcoal.com.au
CHICS front view showing gauges and control handles
CHICS side view showing dissipation system at rear
Relevant Document:
Link to download PDF of full submission
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