What is the method for ventilating pillar lines?

The method for ventilating pillar lines involves keeping the ventilating current along the pillar line. This approach ensures that fresh air is directed into the mining areas where it is needed most, helping to dilute and remove harmful gases, dust, and heat generated in the mining operation. Proper ventilation is essential for maintaining a safe working environment and preventing hazardous conditions, such as the accumulation of methane or other flammable gases.

By maintaining an effective airflow along the pillar line, the overall ventilation system can manage air quality and ensure that workers are exposed to clean, breathable air. This method allows for better control of air circulation throughout the mine, particularly in areas where air quality needs to be monitored closely, thereby promoting safety and operational efficiency.

Other methods mentioned, such as using exhaust fans, limiting airflow to the surface, and sealing off unused lines, may contribute to the overall ventilation strategy but do not specifically address the direct ventilation of pillar lines as effectively as maintaining airflow along those lines does.