Leading practices

Below is a summary of available MOSH dust practices for industry. Complete practice guides can be uploaded from the “documents” folder.

Leading practice

Continuous Real-time Monitoring of Airborne Pollutant Engineering Controls

This practice allows for immediate intervention when the continuous real-time monitoring system detects excessive airborne pollutant levels.




The installation of fogger/mist-spray systems to capture airborne respirable dust:

  • Station ore-pass systems – gold mines
  • Main intake airways with conveyer belts – coal mines
  • Transfer points on surface – coal mines
  • Fogger
  • Simple leading practice

    Footwall/sidewall treatment

    The wetting of footwalls and sidewalls with water and surfactants. Spray cars, drawn by a locomotive, spray the solution onto the foot and side walls so as to consolidate the dust and to prevent it becoming airborne.

    Multi-stage filtration system (MSFS)

    The principle of multi-stage filtration system ensures that contaminated air is drawn/extracted by means of a fan through the filtration unit where it undergoes the following stages of filtration:

    • Stage 1: A pre-filtration system removes large dust particles
    • Stage 2: This stage consists of two layers of oil-wet fibre pads
    • Stage 3: An H-grade High Efficiency Particulate Air Filter (HEPA) is used to ensure complete removal of harmful dust

    Winch cover

    In principle, the winch cover simply involves fitting a cover to the winch drum guard or to the winch casing of existing winches thereby reducing winch operators' exposure to harmful dust.