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icoal mining subsidence raniganj pdf

Old Coal Mine Workings Shaping to Cataclysm A Study at Jharia and Raniganj Coalfields Old Coal Mine Workings Shaping to Cataclysm A Study at Jharia and Raniganj Coalfields Prakash, Amar ; Singh, K.B. 2011-01-01 000000 Cataclysm of underground old/abandoned coal mine workings is a sudden subsidence which occur in the form of trough

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