OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 36 Mining

Section 742 Airborne dust

Subsection 742(1)

This subsection requires water spraying to keep coal dust from becoming airborne. Although this helps keep the dust down significantly, a good portion of coal dust remains airborne. Water does not adhere well to coal dust. In winter, some mines draw ventilation air from the outside without heating it. Since the resulting air in the mine is at a temperature much like that of the outside, an alternative to water is recommended to control dust if freezing is a problem.

Subsection 742(2)

Because underground mobile equipment cannot readily accommodate a supply of water for dust suppression purposes, this section exempts equipment such as shuttle cars from that requirement.

Subsection 742(3)

Since the movement of rubber-tired vehicles can generate large quantities of airborne dust when travelling on dry material, this subsection requires that related roadways are treated with dust suppression chemicals or wetted with water to minimize the creation of airborne dust.

Subsection 742(4)

This requirement for monitoring respirable dust concentrations reinforces the requirements specified by Part 4. The respirable portion of coal dust is a primary cause of pneumoconiosis among coal miners.

Subsection 742(5)

The Director may decide to use this authority to require the installation of dust collectors on exhaust fans if the exhaust air has the potential to become a visibility, fire, explosion or health hazard to workers.