Dust Control Measures in Quarry Aggregate Production

2026-04-17

Aggregate production in quarries involves multiple dust‑generating stages – from drilling and blasting to crushing, screening, conveying, and stockpiling. The resulting fugitive dust not only harms worker health and nearby communities but also risks regulatory non‑compliance and environmental degradation. Effective dust control is therefore essential for sustainable quarry operations. Below are proven measures, applied individually or in combination, to suppress dust at source, during transfer, and across site areas.

Source Suppression

Use water injection or wet drilling in blast holes to trap dust at origin.

Apply foam or surfactant sprays on stockpiles and working faces before excavation.

Process Enclosure & Extraction

Enclose crushers, screens, and transfer points with rigid cladding.

Install local exhaust ventilation (LEV) systems with bag filters or cartridge collectors at high-dust nodes (e.g., cone crusher discharge, vibrating screens).

Wet Processing

Implement water sprays at feed chutes, crusher inlets, and conveyor transfer points.

Use misting cannons or atomized fog systems around primary crushing stations.

For dry processes, add humidification to material streams without oversaturating.

Conveyor & Stockpile Management

Fit belt conveyors with full-length skirting and impact cradles to reduce spillage and air entrainment.

Cover stockpiles with tarps or install wind fences; use telescopic chutes with dust collars when loading trucks.

Road & Yard Control

Pave or gravel internal haul roads and apply chemical dust suppressants (e.g., calcium chloride, lignin sulfonate).

Schedule regular water truck passes with automated timing; limit vehicle speed to 15 km/h.

Passive & Vegetative Barriers

Plant shelterbelts or erect mesh windbreaks around processing plant boundaries.

Maintain green belts to capture fugitive dust and reduce off-site migration.

Operational Best Practices

Schedule blasting and crushing during low-wind periods.

Keep material moisture content above 3–4% in dry seasons via active sprinkling.

monitor real-time PM10/PM2.5 readings from sensors and trigger automated spray systems.

Maintenance & Training

Regularly inspect seals, filters, and spray nozzles; replace worn components promptly.

Train operators to choke-feed crushers (reduces dust generation) and avoid drop heights exceeding 0.5 m.

These techniques, applied in combination, effectively suppress fugitive dust from drilling, blasting, crushing, screening, conveying, and loading – meeting typical environmental compliance standards without excessive water use or energy cost.