Environmental conditions at Deep Navigation Colliery 1981-1982

This report tabulates dust concentrations at Deep Navigation Colliery for the period April 1981 to March 1982. Information regarding seams worked, outputs, methods of working, dust suppression and manpower, together with associated dust concentrations, is presented in a series of face charts.At Deep Navigation Colliers the coalface mean respirable dust concentration was 5.7 mg/m3; the mean total dust concentration was about twelve times greater than this.The only compositional results available are from the control points of faces and these observations indicate very low levels of quartz. Complete compositional data will be reported later.