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      https://www.ias.ac.in/article/fulltext/jess/127/08/0107

    • Keywords

       

      Geophysical; thermography; resistivity meter; self-potential (SP); magnetometer; thermal imaging camera.

    • Abstract

       

      Coal mine fire is a serious problem in Jharia coal field, India. The coal mine fire can be detected with different techniques such as borehole temperature measurement, thermo-compositional analysis, remote sensing techniques, thermo-graphic measurement and geophysical methods. In this study, various geophysical methods were used to detect the surface and subsurface coal mine fires. Geophysical techniques used in the present study are apparent resistivity, self-potential (SP), magnetic method and thermography. Geophysical anomalies such as low SP value of $-$60 mV, high negative magnetic response and low apparent resistivity value helped us to detect and delineate the fire and non-fire areas laterally as well as depthwise. Furthermore, the thermography survey was carried out in the coal field using thermal imaging camera in order to substantiate the geophysical methods. This integrated approach was found to be more advantageous for the detection and delineation of surface and subsurface fire with respect to use of any specific techniques. Moreover, the level of threat towards the locality, national railway line was also assessed unambiguously using the above techniques. Hence, proper planning and implementation towards the mitigation of hazard can be achieved on the basis of the reported results.

    • Author Affiliations

       

      Rakesh Kumar Mishra1 Roy P N S2 3 4 Virendra Kumar Singh1 Jai Krishna Pandey1

      1. CSIR-Central Institute of Mining and Fuel Research (CIMFR), Dhanbad, India.
      2. Department of Applied Geophysics, Indian Institute of Technology (ISM), Dhanbad, India.
      3. The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy.
      4. Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, India.
    • Dates

       
  • Journal of Earth System Science | News

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