Coal Inspectorate | Alert | No.420 V 1 | 14 December 2022
A bulldozer working on a coal stockpile dropped into a void above a conveyor feed valve point.
During preparation of the stockpile for train loading, the location of the feed valve was miscalculated.
The feed valve location was not available on the GPS system in the bulldozer.
External reference points used by bulldozer operators to locate the feed valves were inaccurate.
Coal taken through the feed valve to the load out bin created a rathole, because the void did not reach the stockpile surface.
The coal bridge above the void failed beneath the weight of the bulldozer (see Figures 1 and 2).
All Site Senior Executives should:
All operators should:
Investigations are ongoing and further information may be published as it becomes available. The information in this publication is what is known at the time of writing.
We issue Safety Notices to draw attention to the occurrence of a serious incident, raise awareness of risks, and prompt assessment of your existing controls.
Contact: Stephen Smith, Regional Inspector of Mines , 0436 658 225 QldMinesInspectorate@rshq.qld.gov.au
Issued by Resources Safety & Health Queensland
All information on this page (Bulldozer drops into a void above a conveyor feed valve point - https://www.rshq.qld.gov.au/safety-notices/mines/bulldozer-drops-into-a-void-above-a-conveyor-feed-valve-point) is correct as of time of printing (Dec 3, 2023 9:20 pm).