Residual subsidence over abandoned mine : A case Study

Ground movement takes place even if the mine is abandoned not active due to the existence of underground voids or undersized supporting pillars. Subsidence over the abandoned coal mines is difficult to predict and hence, the exact magnitude of the triggered subsidence is not obtained. The subsequent measurement of the ground movement is generally much smaller than that attained in the active mines. Subsidence investigations were conducted for a year along with probing of probable causes in Kendwadih abandoned mine of Bharat Coking Coal Limited as dealt in this paper