Pneumoconiosis Field Research: Environmental conditions at Linby Colliery 1977/78

Respirable dust concentrations and compositions at Linby Colliery are tabulated for the period April, 1977 to March 1978. Information regarding seams worked, outputs, method of working, dust suppression and manpower, together with the associated dust concentrations is presented in a series of face charts.The mean coalface respirable dust concentration was 4.0 mg/m3. The mean ash content was 58.0 per cent and the quartz content was 7.1 per cent (representing a quartz concentration of 0.29 mg/m3).Total dust concentrations are given, and were on the average, five times as high as respirable dust concentrations.Nitrous fumes concentrations are noted. Overall mean shift concentrations were, nitric oxide 1.6 ppm and nitrogen dioxide 0.09 ppm. “”