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A Geophysical Survey of Subsidence area around Limestone Mine Sites
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  • Journal title : Geophysics and Geophysical Exploration
  • Volume 18, Issue 4,  2015, pp.207-215
  • Publisher : Korean Society of Earth and Exploration Geophysicists
  • DOI : 10.7582/GGE.2015.18.4.207
 Title & Authors
A Geophysical Survey of Subsidence area around Limestone Mine Sites
Hong, Jinpyo; Ji, Yoonsoo; Oh, Seokhoon; Choi, Sungoong;
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Electrical resistivity surveys were conducted at two subsidence areas near and at limestone mine sites, respectively, in order to estimate their causes of subsidence and the regions of potential occurrence. In addition, the linkages of mine development with these subsidences were investigated by the rock engineering analysis. Two study areas have different geological setting. One study site is the land subsidence area, which contains clay and sandy soil near the limestone mine, The other study site is the land subsidence area located just above the mine, which is expected to be relevant to the limestone mine. As results of two-dimensional (2D) electrical resistivity surveys at the sites 1 and 2, low resistivity zones, which are 70 ~ 120 ohm-m and 20 ~ 50 ohm-m, respectively, were found under the subsidence zones. For the study site 1, the possibility of subsidence was confirmed by using three-dimensional (3D) inversion performed with 2D resistivity profiles. For the study site 2, the cause of the subsidence and the possibility of subsidence occurrence were confirmed by rock engineering computation with regard to measurement line 7 in which low resistivity accompanied by subsidence area was observed.
Ground subsidence;Limestone;Electrical resistivity survey;Stability analysis;Mine;
 Cited by
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