How far should the line curtain be held from the face?

The recommended distance for the line curtain to be held from the face is 10 feet. This distance is crucial for ensuring proper ventilation in the mining environment, which helps to mitigate issues such as the buildup of harmful gases and dust. Holding the line curtain at this distance ensures that fresh air is flowing effectively to the working area while allowing for the exhausted air to be drawn away, maintaining a safer atmosphere for miners.

Maintaining line curtains too close to the face can obstruct airflow, reducing ventilation efficiency and potentially leading to hazardous conditions. Conversely, placing them too far away may not provide adequate protection and could allow unwanted air to enter, which could carry dust and gases towards the miners. Therefore, 10 feet represents an optimal balance that enhances miner safety and operational effectiveness.