What method allows for better control of air flow to the working face?

The method that allows for better control of air flow to the working face is properly installed auxiliary fans and tubing. This approach enhances ventilation efficiency in underground mines, which is crucial for maintaining air quality and providing fresh air to workers. Auxiliary fans can be strategically placed to direct airflow exactly where it is needed, thus optimizing the ventilation system and ensuring that the air at the working face is replenished effectively.

Using auxiliary fans in conjunction with appropriately designed tubing helps to transport fresh air while simultaneously exhausting contaminated air. This not only improves the working conditions but also reduces the risk of hazardous environments created by the accumulation of gases or dust.

In contrast, natural ventilation relies on temperature differences and air pressure to move air but can be unpredictable and insufficient in areas of high demand for airflow. Line brattice without assistance may help guide air, but its effectiveness is limited without the mechanical support of fans. Manual manipulation of air currents can be ineffective and labor-intensive, often failing to achieve the precise control needed for optimal ventilation. Thus, employing properly installed auxiliary fans and tubing remains the most effective method for managing airflow in underground mining operations.