Solid Energy says it may not re-open its Spring Creek Mine as soon as gets the go- ahead from the Labour Department, because it may take longer to meet the company's own expectations.
The department has indicated the mine - the largest on the West Coast with 230 workers - could reopen as early as Wednesday.
The mine was closed on Monday because of concerns over three safety incidents, including a generator fire and two system alert failures relating to fans.
Solid Energy senior managers and department officials have discussed the prohibition notice on underground work at Spring Creek.
Acting chief mines inspector Gavin Taylor says if the company provides a full explanation of the incidents, and a plan and a definite timeline for addressing the safety failures, the notice will be lifted.
However, Solid Energy chief operating officer Barry Bragg says that is only the beginning and the company has its own expectations and standards that need to be met.