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2018 Vol. 24, No. 3
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Wei XIONG, Ke LIU, Wen FAN. ANALYSIS ON INTERNAL DYNAMIC GEOLOGICAL GENESIS OF SHALLOW LANDSLIDE IN QIN-BA MOUNTAIN AREA[J]. Journal of Geomechanics, 2018, 24(3): 424-431. doi: 10.12090/j.issn.1006-6616.2018.24.03.044
Citation: Wei XIONG, Ke LIU, Wen FAN. ANALYSIS ON INTERNAL DYNAMIC GEOLOGICAL GENESIS OF SHALLOW LANDSLIDE IN QIN-BA MOUNTAIN AREA[J]. Journal of Geomechanics, 2018, 24(3): 424-431. doi: 10.12090/j.issn.1006-6616.2018.24.03.044
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ANALYSIS ON INTERNAL DYNAMIC GEOLOGICAL GENESIS OF SHALLOW LANDSLIDE IN QIN-BA MOUNTAIN AREA

  • 1.

    Guangxi Communications Investment Group Co. Ltd., Nanning 530028, Guangxi, China

  • 2.

    Department of Geological Engineering, Chang'an University, Xi'an 710054, Shaanxi, China

  • 3.

    Key Laboratory of Western China Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, Shaanxi, China

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Received Date:  11 February 2018
Revised Date:  08 April 2018
    Abstract
  • Taking the Diangou shallow landslide in Qin-Ba Mountain Area as an example, deformation destruction characteristics and internal dynamic geological genesis are analyzed in detail and multi-scale through regional macrostructure, side slope microstructure and rock microstructure. The study results show that the formation mechanism of shallow landslides in Qin-Ba Mountain Area is closely related to the internal dynamic geological conditions. Landslides usually developed in weak metamorphic areas and affected by regional tectonic activities. Folds, faults and other macro-structures were continuously and crossly distributed in the area which resulted in the deformation, elongation and shear of minerals in the rock, forming a ductile shear zone and a large number of micro-cracks. The filling and intersecting of multi-stage cracks made the rock mass more deteriorated. When the stress exceeded the rock strength, a series of micro-deformation occurred in the internal lamellar structure, such as bending, breaking and fracturing, which are the main deformation and failure modes of metamorphic rocks. The oblique crossing of faults and landslides, the same direction and inclination of the rock layers and folds with the slope aspect, providing a good forming condition of landslide. This relatively fragile geological environment affected by external factors, such as human activity and heavy rain, can easily lead to shallow landslides. It would be serious threats for nearby residents and constructions.
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