A binding terms sheet over the $A10 million cash deal to acquire the mine off owner Zedemar Holdings dated back to November and was later extended to February 18, then again to June 20.
With that date passing over the weekend, Coalbank yesterday advised that the binding terms sheet had expired as it was unable to satisfy the conditions.
The ongoing coal price downturn has made financing difficult as banks find coal-related investments increasingly risky.
The mine, which was put on care and maintenance during the low coal price times of 2003, has 13.7 million tonnes of probable reserves and 308.2Mt of resources, with most of it inferred (284.1Mt).
Coalbank previously said the coal was high grade thermal coal, with energy values of about 6700 kilocalories per kilogram.
Australian-listed Coalbank was partially acquired (62.34%) by Hong Kong-based Loyal Strategic Investment in 2013.
