Rochette, 36, was killed at Vale's Copper Cliff Smelter on April 6, after suffering severe head trauma from a malfunction with an ore crusher.
The Ministry of Labour has not yet confirmed the cause of the death for the two Lockerby Mine contractors.
They are the fifth and sixth workers to be killed in Sudbury area mines, or mining-related workplaces, in the past three years. A forensic unit from Greater Sudbury Police Service arrived on scene at Lockerby Mine around 11:45 a.m.
Vale later pleaded guilty to three charges under the Occupational Health and Safety Act and was fined $1,050,000 on Sept. 17, 2013.
On Jan. 29, 2012, development miner Stephen Perry, 47, was killed at Vale's Coleman Mine in Levack.
Perry died after he was struck by a 14-ton piece of rock that broke from the wall when he was working at the 4,215-foot level of the mine.
The Ministry of Labour is currently in the midst of a mining health and safety review in response to the fatalities and injuries that have occurred in mines across the province in recent years.
The review board has conducted public consultations in a number of mining jurisdictions across the province, including Sudbury.
The province's mining health and safety review aims to look at a wide range of areas related to mine safety, including: technological advances, assessing current health and safety regulations and examining mine safety training practices.