When should brattice material stoppings be used in a mine?

Brattice material stoppings are designed to control airflow in underground mines, primarily in areas where ventilation needs to be directed or partitioned. The correct response indicates that brattice material should be used temporarily next to the last open crosscut. This is important because in this particular area, controlling air movement can enhance safety and ventilation efficiency without the need for a permanent installation.

Using brattice as a temporary solution allows for flexibility in airflow management, especially in dynamic environments where mine layout and airflow needs may change over time. The next to the last open crosscut is a strategic location, as it often marks a transition point in the mine's airflow system, where adjustments may need to be made based on operational changes or safety considerations.

Utilizing brattice material this way supports the overall ventilation strategy while minimizing the potential for obstructions or permanent alterations that could hinder future operations or adaptations needed as mining progresses. Hence, this approach represents prudent management of ventilation resources in a mine setting.