Research purposes: Giant deep rock landslides have the characteristics of complex genesis, large scale, and difficulties in investigation and processing. Due to the limitations of topographic and geological conditions and the applicability of geophysical methods, a single geophysical method often can't fully and effectively reveal the scope of landslides and the spatial form of sliding surface. In this paper, the exploration of the giant deep tuff landslide in Xiageliao was taken as an example. Based on factors such as geological conditions, exploration purposes, and exploration methods, the exploration model suitable for comprehensive geophysical exploration of giant complex rock landslides was studied.
Research conclusions: (1) It is very beneficial to adopt the comprehensive geophysical prospecting first survey procedure based on geological surveys for complex deep rock landslides. The physical detection line shall be laid out in a mesh along the main axis and the vertical slope. (2) High-frequency magnetotelluric method, high-density electrical method, shallow seismic reflection method and borehole TV comprehensive geophysical exploration have the advantages of multi-physical and multi-scale detection, and can effectively detect the spatial distribution shape, perimeter and sliding zone characteristics of landslides. (3) The results of geophysical exploration and interpretation more reliably reflect the spatial distribution pattern and law of the sliding surface, which can be used as an important basis for guiding drilling layout and landslide stability analysis. (4) The research conclusions are applicable to the investigation of giant deep landslides.
Key words
rock landslide /
high-frequency magnetotelluric method /
high-density electrical method /
shallow seismic reflection method
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