Guerinoni pleaded not guilty but was convicted and fined $230,000 plus costs of $75,000.
Mining sector rocked by two fatalities at mines in WA's Pilbara this month.
Third potentially serious incident involving the use of WP and ITC combinations underground.
Sexual assault reports on WA mines have risen sharply in past three years.
Combustion event likened to a firework display inside the vehicle.
The mechanic suffered serious injuries to his thumb, index and middle fingers.
New rules could cut months from the construction timeline.
WA mines minister Bill Johnston called new workplace exposure standard a big win for mine workers.
Two community partnerships acknowledged this year.
The government added an extra $5 million to the EIS program earlier in the year.
DMIRS director says exploration drilling activities are bedrock to a sustainable resources industry....
Both the victim and alleged attacker were taken to Derby Hospital for treatment.