356 ◾ Risk Assessment and Security
8.9.10 Hazardous Substances
Technological devices to monitor hazardous substance should be installed. Medical
monitoring of hazardous substance exposure should be employed for workers, thus
minimizing health injury.
8.9.11 Fire and Explosion
e tunnel operator and manager must ensure safety measures associated to under-
ground explosion, ammable gas, and hazardous debris. Important considerations
for the risk management plans are delineated as follows:
1. Remediation of incombustible dust roof, sides, and oor of accessible parts of
the mine
2. Clean-up and prevention of dispersions/accumulations of coal dust that may
contribute to an explosion or ignition of ammable gas
3. Employment and sustaining of ...