The former chief executive of the Pike River Coal company will this week appear before the Royal Commission inquiring into the deaths of 29 men at the West Coast mine.
The workers died in explosions at the mine in November last year.
Pike River Coal Ltd was placed in receivership in December.
Its chief executive Peter Whittall is due to begin giving evidence on Tuesday, including on the design and development of the coal mine.
The company was accused last week of having insufficient geological information to accurately define and construct the mine.
Before Mr Whittall begins giving evidence, the three Commissioners will hear from a policy manager for Workplace Health and Safety, James Murphy, and Department of Labour health and safety inspector Michael Firmin.
The start of the second week of hearings was delayed when commission chair Justice Panckhurst and lawyers representing several parties could not get to Hokitika Airport on Monday morning because of fog at Christchurch Airport. The hearing was due to start at 1pm.
The commission began hearings at the Greymouth District Court on 11 July.
The focus in the first two-week phase is the context of the event, including the regulatory environment for mining and the design and development of the Pike River mine.
