SUPPLIED
A piece of debris recovered from the Pike River mine drift, believed to be a piece of the mine’s main ventilation fan. A briefing to Minister Responsible for Pike River Re-entry Andrew Little, released publicly on Tuesday, says the aim of the boreholes was to get “additional information on mine infrastructure and conditions, and on the location of other evidence”. The boreholes would be drilled by contractors after the mine drift was recovered, it says. A police spokesperson said an “initial high-level feasibility study” had been done to investigate whether more boreholes were needed to support the ongoing investigation.