What material should fan buildings be made from?

Fan buildings in underground mines are critical structures that house ventilation equipment, including fans that are essential for ensuring a safe and breathable atmosphere for workers. The correct choice is that fan buildings should be made from incombustible materials. This is primarily due to the safety considerations inherent in underground operations.

Using incombustible materials helps to minimize the risk of fire and ensures that the structural integrity of the fan buildings is maintained even in the event of an emergency. Incombustible materials are less likely to ignite and can withstand high temperatures without contributing to the spread of fire, which is particularly important in environments where flammable gases may be present.

Additionally, incombustible construction materials are structurally resilient, augmenting the durability of the fan buildings against potential hazards like rock falls or impacts. This construction choice contributes to the overall safety and stability of the underground mining environment, helping to protect both personnel and equipment.

The other options—wooden, plastic, and recyclable materials—do not provide the necessary fire resistance and structural integrity that are vital for fan buildings situated in the potentially hazardous conditions of an underground mine.