10th FIG International Symposium on Deformation Measurements

نویسندگان

  • Linlin Ge
  • Chris Rizos
  • Shaowei Han
  • Howard Zebker
چکیده

Compared to opencut mining, underground coal mining is more common in Australia due to its lesser impact on the environment. Although there are several underground mining methods, such as the longwall, pillar, bord, and miniwall, longwall mining is the most commonly used method due to its high efficiency. However, longwall mining does lead to significant ground subsidence. Mining subsidence is so common that in order to ensure the safety of surface transportation and local residents, current monitoring programs in many mines have included GPS surveys, conventional precise levelling and theodolite surveys, EDM surveys, and remote electronic monitoring (Hebblewhite et al, 2000). These techniques are costly and inefficient compared with remote sensing techniques such as that afforded by Synthetic Aperture Radar Interferometry (InSAR). However, InSAR results may not be accurate enough for this application due to the uncertainties in the SAR satellite orbit and the signal disturbances due to the atmosphere. GPS surveys can be used to account for these biases.

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تاریخ انتشار 2001