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.