Abstract
Surface ground movements are usually described by a number of characteristic indices such as vertical displacement, horizontal strain and slope, which are an inevitable consequence of underground mining. Every point at the surface over a panel is subjected to strain and slope during mining and its investigation is essential to assess the safety of surface structures. Therefore, the behaviour of dynamic active and residual subsidence was studied for a few panels of Jharia coalfield. The subsidence and slope were linearly related to time. Compressive and tensile strains showed typical fluctuating characteristic behaviour. The rate of mining being a key and controlling parameter for rate of subsidence their inter-relationship was developed, which showed a rational trend. Compressive and tensile strains and slope showed poor correlation with rate of face advance.
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Acknowledgments
The financial support extended by Tata Steel to undertake this study is sincerely acknowledged. The authors are highly thankful to the Director, Central Institute of Mining and Fuel Research, Dhanbad, for permitting to publish the paper. Subsidence monitoring team are also sincerely acknowledged for data generation at regular intervals to carry out this study. The views expressed in this paper are those of authors and not necessarily of the organizations they represent.
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Prakash, A., Kumar, A. & Singh, K.B. Dynamic Subsidence Characteristics in Jharia Coalfield, India. Geotech Geol Eng 32, 627–635 (2014). https://doi.org/10.1007/s10706-014-9738-7
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DOI: https://doi.org/10.1007/s10706-014-9738-7