A planning application has been lodged to extract 1.3m tonnes of coal near Kirkconnel in Dumfries and Galloway.
ATH Resources recently opened a lengthy conveyor belt in the area
ATH Resources announced the proposal for its Rigg site which it said would create more than 100 jobs if approved.
All the coal produced at the site would be transported by extending an eight-mile "conveyor belt" launched earlier this year.
The company said that once the mine ceased to be operational there would be extensive restoration work undertaken.
ATH launched its conveyor belt between the Glenmuckloch open cast mine near Kirkconnel and a railhead at New Cumnock in Ayrshire earlier this year.
The belt cost almost £10m to build in order to replace 50,000 lorry journeys undertaking two million road miles a year.
All coal mined at the new site would travel on the conveyor network - eliminating the need for road transport.
The Rigg mine would have an operational life of just over two years with a further two years of restoration works required after mining ceased.
"We are pleased to be able to propose another sensitively planned scheme in the area close to our existing Glenmuckloch site," said ATH Chief Executive Tom Allchurch.
He confirmed that if the plans received permission they would create more than 100 jobs in the area.
The application will now have to be considered by Dumfries and Galloway Council.