Please see below Safety Alert from the Queensland Government
Mines Inspectorate—All mines Safety Alert No. 293 | 12 September 2012
A D10 dozer was destroyed and a 996 digger severely damaged when they were hit by rocks from an overburden blast. There were no injuries to workers.
The aim of the blast was to ‘just lift’ the material and drop it back down. It was not designed as a cast blast. However, the shot, which contained 400 tonnes of explosive, moved the large block material more than 90 m.
The preliminary investigation found that equipment was not excluded from the blast zone in line with the mine’s safety and health management system. As a result of this failure to enforce equipment exclusion zones, the unplanned and uncontrolled movement of blasted rock damaged the machines.
Where communications are part of the final pre-blast controls, ensure there is a positive feedback mechanism (i.e. not just 1 way communication).
D10 dozer destroyed by rocks
Authorised by Gavin Taylor | Chief Inspector of Coal Mines
Contact: Ram Bhattacharjee, Inspector of Mines, +61 7 4967 1447
Place the alert on noticeboards and ensure all relevant people in your organisation receive a copy.
See more safety alerts and bulletins at http://mines.industry.qld.gov.au/
And the hazard database at http://mines.industry.qld.gov.au/safety-and-health/publications-guides.htm
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”Please note that any references to legislation, standards or codes in these alerts and bulletins may or may not be relevant to operations in South Australia. Readers should ensure that they identify and apply the legislation, standards and codes relevant to their operations in South Australia.”