Why are doors in a mine considered objectionable?

Doors in a mine are considered objectionable primarily because they can cause short-circuiting of air and present fire hazards if they are damaged. In an underground mining environment, maintaining proper airflow is crucial for ensuring ventilation and the safety of miners. Doors that are not properly sealed or that malfunction can disrupt the intended airflow patterns, leading to areas of stagnant air or increased concentrations of harmful gases.

Additionally, if these doors are damaged, they can create safety risks, as they might not function as intended, potentially allowing flammable materials to accumulate or making it difficult to manage smoke and heat in the case of a fire. Thus, the presence of doors can compromise the safety and efficiency of the mine’s ventilation system, which is why they are viewed critically in underground operations.