Mining engineers perform many tasks related to the planning, design, organization and supervision of mine development and mining facilities. They design 3D plans of galleries, tunnels or pits, check installations regularly, plan mining sequences and analyze optimization projects. Typically, they prepare and supervise ore extraction, but they can develop expertise in a specific area, such as mine planning, ground control or rock mechanics, and perform more specialized tasks. They determine the safe and efficient methods of mining mineral deposits and the proper methods of drilling and blasting for the construction or operation of a mine. They plan and design or select mining and processing machinery and oversee the development of mines and their structures, as well as their operation and maintenance.