Bharti, Abhay Kumar2017-11-142017-11-142016-06http://hdl.handle.net/123456789/579enTomographyElectrical resistivityCoalmineCoal fieldGeology of Jharia coalfiledGeology of Raniganj coalfieldGondwana coal fieldsAGPPh.DElectrical resistivity tomography for mapping of coal mine voids over parts of Jharia and Raniganj coal fields, IndiaThesis