ABSTRACT:

By adopting the research methods of in-situ investigation, laboratory test and theoretical analysis, the slope sliding mechanics and key factors of effecting stability of the slop in catastrophe was analyzed at Shenli open mine. The working slope was divided into four zones including land sliding zone, potential sliding zone, relatively stable zone and importance engineering zone by analyzing the engineering geological condition and lithological characteristics of slope. By the application of the in-situ monitoring data, the model of forecasting the landslide was built up. Combined with the modified grey model and mutation forecasting model, the suitable method of landslide catastrophe forecasting was given. The in-situ monitoring data and the land sliding condition were verified, which proves the feasibility of the forecasting method.

1 INTRODUCTION

With the rapid growth of demand for coal, open coal mining scale and speed got rapid development. Open stope has deepened. The height of slope exposure, area and maintain time has also increased. This leads to open mining slope instability of landslide incidents. Not only the normal production of mine was disturbed in order, the economy of the country suffered, but also constituted a serious threat to the safety of life[1]. Therefore, making scientific prediction on the stability of the slope engineering effectively has an important guiding significance to the safety and efficiency mining of open-pit mines.

2 THE SERIOUSNESS OF SHENGLI PIT SLOPE SLIDE

ShengLi first open coal mine is located in the Midwest ShengLi coal mining area which is the main coalfields. After years of opencast mining, by the end of 2006, it had formed a mining pit which north-south length was 1.8 km and east-west width was 0.9 km. Now the mining depth was 930m level and the height of the side slope was 50∼60 m.

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