How frequently must roadway dust samples be collected near a longwall face?

Roadway dust samples must be collected near a longwall face on a weekly basis to adequately monitor the air quality and safety conditions in mining operations. This frequency is crucial because dust levels can fluctuate significantly due to various factors such as mining activities, ventilation changes, and the surrounding geological conditions. Regular weekly sampling allows for timely identification of any potential health hazards associated with dust inhalation and ensures compliance with safety regulations set by mining authorities. By maintaining a consistent sampling schedule, operators can implement necessary measures promptly to mitigate dust exposure, thus prioritizing the health of workers in the mine.