Operate underground loading machine to load coal, ore, or rock into shuttle or mine car or onto conveyors. Loading equipment may include power shovels, hoisting engines equipped with cable-drawn scraper or scoop, or machines equipped with gathering arms and conveyor.

Advance machines in order to gather material and convey it into cars. Drive machines into piles of material blasted from working faces. Operate levers to move conveyor booms or shovels so that mine contents such as coal, rock, and ore can be placed into cars or onto conveyors. Signal workers to move loaded cars. Start conveyor booms and gathering-arm motors, and operate winches to position cars under boom-conveyors for loading. Stop gathering arms when cars are full. Clean hoppers, and clean spillage from tracks, walks, driveways, and conveyor decking. Estimate and record amounts of material in bins. Inspect boarding and locking of open-top box cars and wedging of side-drop and hopper cars in order to prevent loss of material in transit. Move trailing electrical cables clear of obstructions, using rubber safety gloves. Notify switching departments to deliver specific types of cars. Observe and record car numbers, carriers, customers, tonnages, and grades and conditions of material. Oil, lubricate, and adjust conveyors, crushers, and other equipment, using hand tools and lubricating equipment. Pry off loose material from roofs and move it into the paths of machines, using crowbars. Replace hydraulic hoses, headlight bulbs, and gathering-arm teeth.

Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance.

Operation and Control -- Controlling operations of equipment or systems. Repairing -- Repairing machines or systems using the needed tools. Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Equipment Maintenance -- Performing routine maintenance on equipment and determining when and what kind of maintenance is needed.

Control Precision -- The ability to quickly and repeatedly adjust the controls of a machine or a vehicle to exact positions.

Operating Vehicles, Mechanized Devices, or Equipment -- Running, maneuvering, navigating, or driving vehicles or mechanized equipment, such as forklifts, passenger vehicles, aircraft, or water craft. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Performing General Physical Activities -- Performing physical activities that require considerable use of your arms and legs and moving your whole body, such as climbing, lifting, balancing, walking, stooping, and handling of materials. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems.