US-based Arch Coal's Black Thunder Mine located in Wright, Wyoming, has ordered for ten EVO-MT 9300 LNG Conversion Systems from Gaseous Fuel Systems (GFS) for installation on Komatsu 930E haul trucks.
With the latest order, the company will assess the benefits of using liquid natural gas (LNG) in its mining operations.
The new systems will be configured for use with either cummins or MTU engines at the mine.
The Black Thunder surface coal mine is located in the Powder River basin, which contains one of the largest deposits of coal in the world.
At present, Arch Coal has a fleet of LNG-powered Komatsu 830E units that have been in operation at the coal mine since January 2014.
The newly converted Komatsu 930E haul trucks are set to join this existing fleet.
GFS hopes to complete the project by the second quarter 2015 and is working with Arch Coal to develop NG+D solutions for other applications.
The applications include additional haul truck models, as well as other diesel-powered surface mining equipment.
GFS president Jason Green said: "We are pleased to continue our relationship with Arch Coal and are excited that they have chosen GFS Corp as a technology and service partner in their ongoing effort to reduce operating costs and improve sustainability.
"We look forward to working with Arch Coal and the outstanding team at Black Thunder Mine as they significantly expand their LNG conversion project."
Arch Coal produces coal for the global steel and power generation industries and controls more than five billion tonnes of metallurgical and thermal coal reserves.