›› 2011, Vol. 32 ›› Issue (12): 3672-3678.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on formation evolution mechanism of waste dumps landslides on loess foundation

WANG Hai-bin1, LI Xiao-chun1, MI Zi-jun2, YANG Li-yuan2, YANG Zhong-lin2   

  1. 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Mining Company, Taiyuan Iron & Steel(Group) Co., Ltd., Taiyuan 030027, China
  • Received:2011-01-08 Online:2011-12-10 Published:2011-12-13

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Abstract: The south waste dump of Jianshan Iron Mine located on weak loess slope foundation due to the unique-selection of the dump site, various degree failures sequentially occurred since 2008. Based on engineering analogism, in-situ investigation, field monitoring and tracking geologic survey technology were used to research the landslide formation evolution mechanism of the waste dumps located on loess foundation, specially the landslide types and failure modes (low-speed and slight-starting, rotational and retrogressive mode), formative mechanism and conditions(overload and lateral compression leading, precipitation trigger), landslide procedure, feature and distribution regulation (supporting course creep-floor heave-loess ridge tensile fracturing-rotational sliding -crack propagation-slip plane-retrogressive fallout). Starting with effect interaction characteristics between the waste dump and the loess slope foundation, the limit height of dumping-site determined by theoretical formula, failure range estimated by engineering analogism and statistical analysis, influence degree on environmental(equipments, human beings, building, etc.) were studied. It was the key countermeasure to adjust and control course safety of substructure, such as intelligently using dumping-site space, adjusting time-space relation during waste dumps emission, controlling emission speed. The conceptual design is submitted that moderately failure should be permited.

Key words: waste dump, weak loess slope foundation, low-speed and slight-starting, retrogressive landslide, formation evolution mechanism, engineering analogism

CLC Number: 

  • TD 824.7
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