Gas sampling was done to evaluate the possibility of mounting a rescue. When rescuers were preparing to go underground on November 24, Mr White said he got a call informing him of a second explosion.
He said there had been discussion about using a temporary seal to restrict air flow into the mine, or a GAG jet engine machine to render the mine atmosphere inert, but these were rejected because authorities felt it would send a message there was no hope left of the workers surviving.
Mr White spoke to survivor Daniel Rockhouse by phone after the explosion and told him to stay low and get out.
Concern has also been raised about the delay in contacting families of the workers left in the mine. Mr White said it took time to account for the people underground because some of them had not placed their tags on a tag board as they were supposed to, while some from a previous shift had not removed their tags from the board after leaving the mine.
He said New Zealand mining regulations were set at a lower standard than he was used to in Queensland. In his time at Pike he had had to terminate an employee for a serious safety breach, but his approach was generally to encourage people to act safely "rather than take the big stick".