Qualitative Assessment of Strata Control in an Indian Underground Coal Mine

A prerequisite to reduction in the number of roof/side fall occurrences—a stated goal of DGMS for enhancing workmen safety in underground coal mines—is risk identification through application of appropriate assessment techniques. This article presents the outcome of a study undertaken to identify, analyse and evaluate the roof/side fall risks. WRAC and Risk Matrix tools have been used to provide a qualitative measure of the risk magnitude. Outcomes of a case study performed in an Indian underground coal mine are presented in the present work. It could be inferred that hazard severity increased because of the existence of “geological disturbances and weak roof and sides”. Operational lacunae, such as non-determination of RMR, non-framing of SSR, and non-availability of support material, enhance roof/side fall risks.