What is the purpose of a line brattice in a mine?

The purpose of a line brattice in a mine is to direct air to the working face. This is essential for maintaining proper ventilation within underground workings. Adequate airflow is crucial not only for providing fresh air to miners but also for diluting and removing harmful gases and dust that can accumulate during mining operations. A line brattice helps channel the air effectively, ensuring that it reaches the areas where workers are actively engaged in mining, thus enhancing safety and health conditions in the workplace.

In contrast, heating in working areas, preventing water infiltration, and marking safe working zones refer to different aspects of mine safety and management. While these are all important considerations in mining operations, they do not relate to the primary function of a line brattice, which is focused specifically on air flow management.