In underground mining a common term is mine face where the mining work is being advancing. Face machineries play an important role in coal production. Most common face machineries used in underground mines are; Side discharge loader (SDL), Load haul dump machine (LHD), Road Header, Continuous Miner , Twin bolter or Quad bolter, Feeder breaker, Shuttle car & Extensible belt conveyor, Chain conveyor etc. Locomotives, which are used as utility van in the mine district. All face machinery shall be under charge of competent person. As per CMR 2017 “competent person” in relation to any work or any machinery, plant or equipment means a person who has attained the age of twenty years and who has been duly appointed in writing by the manager as a person competent to supervise or perform that work, or to supervise the operation of that machinery, plant or equipment, and who is responsible for the duties assigned to him, and includes a shot firer.