By RNZ
Pike River families say they accept it is too difficult and expensive to continue with the drift recovery project.
The Pike River Family Reference Group, which represents families of 27 men who died in the Pike River mine, said the families accepted advice that going further would be expensive and complex.
In a statement, they said: "Families accept advice that going further would be a major, expensive engineering project, with complex potential safety risks, and it would be difficult to convince WorkSafe to give further exemption to mining licence."