Pneumoconiosis Field Research: Environmental conditions at Coventry Mine 1973/74

This report tabulates respirable dust concentrations and compositions at Coventry Mine for the period April, 1973 to March, 1974. Information regarding methods of working, outputs and manpower is also given.3The mine had a mean coalface respirable dust concentration of 3. 7mg/m3 .The mean ash content of the respirable dust was 40 .2 percent and the mean quartz content 4. 1 per cent (concentration of 0. 15 mg/m3 ).Total dust concentrations are tabulated and, on average, for underground samples were nine times higher than the respirable dust concentrations. “”