Abstract
Abstract Borehole log data gathered during a subsidence investigation in 1978–79 are used to derive a classification scheme for Coal Measure rocks. The results of height of void migration above workings are compared to those arising from use of Piggott & Eynon’s (1977) geometrical collapse zone method and Bienawski’s (1980) Rock Mass Rating scheme. It is concluded that the analysis helps to assess areas of greatest instability, which thus aids land-use planning and also the planning of ground investigations, ground stabilization, and re-development.
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