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.

Other names for Loading Machine Operators, Underground Mining: Buggy Man, Coke Loader, Continuous Miner Operator, Equipment Operator, Joy Loader, Joy Loading Machine Operator, Joy Operator, Load Haul Dump Operator (LHD Operator), Loader Operator, Loading Machine Operator, Machine Loader, Mechanical Shovel Operator, Miner, Miner Operator, Muck Hauler, Muck Operator, Mucker Operator, Mucking Machine Operator, Production Miner, Shuttle Car Operator, Under Ground Miner,

• 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.