Another step has been taken towards recovery teams getting into the entry tunnel of the Pike River mine.
Twenty-nine men were killed in explosions at the West Coast mine that began on 19 November last year. Their bodies remain in the mine.
Mines Rescue staff have travelled only about 300 metres into the tunnel since the disaster.
A lawyer for the Pike River families, Richard Raymond, says new equipment is being brought in, including drilling equipment and a foaming product called rockseal.
Mr Raymond says it should be possible to use the new materials to block the 2km tunnel and open it to recovery teams by February next year.