Abstract：Large rock slides are a sudden geological hazards with the sudden high power release，which often cause heavy casualties and economic losses. The rock slide of locking section is a main type of large rock slide，and the development process is relatively concealed and the occurrence is quite sudden. In this paper，the locking section of a rock slide was subdivided into five types based on the existing form and the position of the locking section，namely，“three sections type”，“retaining wall type”，anti-slide block type，linear multilevel type and stepped multistage type. The engineering geological characteristics，the development of landslide and the characteristics of sudden instability were compared and analyzed with the specific locking section of landslides. In addition，the precursor information of instability，such as the initiation and coalescence of tensile cracks on the trailing edge of the landslide，the expansion on the leading edge，the deformation of the slope body and the acoustic signal characteristics of micro fractures in rock，were systematically analyzed in terms of the transient characteristics. According to the precursor information of different landslide instability in different stages of development，with the application of InSAR，LiDAR，GPS，3D Laser Scanning and rock microseismic technology，the early warning and control method of landslide instability was proposed by using the integration of the“space-sky-ground- interior”. The acquisition of the precursor information of landslides in different stages plays the important guiding role for the prevention and control of the sudden rock slide of locking section.
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2017, Vol. 36 
