Pneumoconiosis Field Research: Summary report on environmental conditions at Coventry Colliery, 1965-1975

This report summarises the environmental measurements made at Coventry Colliery during Phase II of the Pneumoconiosis Field Research and covers the period from June, 1965 to December, 1975.A brief description is given of the colliery, the seams worked, the mining methods, the technique and results of environmental sampling. The dust concentrations, which are in gravimetric units, are tabulated and discussed in relation to the mining activities.Both respirable and ‘total dust’ concentrations are given for all occupational groups and where there was no direct sampling, estimates have been obtained by comparison with similar groups and conditions. The composition of the respirable dust for the various general environments is also discussed.Throughout this period Coventry Colliery had a coalface (all shifts) mean respirable dust concentration of 4.5 mg/m3. The ash content of the respirable dust was 38. 1 per cent and the mean quartz in sample was 3.3 per cent (concentration 0. 15 mg/m3).