Build doors or brattices (ventilation walls or partitions) in underground passageways to control the proper circulation of air through the passageways and to the working places.

Installs rigid and flexible air ducts to transport air to work areas. Drills and blasts obstructing boulders to reopen ventilation shafts. Erects partitions to support roof in areas unsuited to timbering or bolting.

Building and Construction -- Knowledge of materials, methods, and the tools involved in the construction or repair of houses, buildings, or other structures such as highways and roads.

Installation -- Installing equipment, machines, wiring, or programs to meet specifications. Equipment Selection -- Determining the kind of tools and equipment needed to do a job. Quality Control Analysis -- Conducting tests and inspections of products, services, or processes to evaluate quality or performance.

Extent Flexibility -- The ability to bend, stretch, twist, or reach with your body, arms, and/or legs. Static Strength -- The ability to exert maximum muscle force to lift, push, pull, or carry objects

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. Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources.