Study On Waste Dump Landslide Inducement Mechanism And Monitoring And Early Warning Technology Of Zijinshan Gold And Copper Mine

With the gradual development and utilization of mineral resources in our country, the open-pit mine is entering to the stage of deep mining. The mining slope instability becomes an important threat to safety production of mine. Especially in recent years, the frequent extreme weather conditions, which often induced the mine slope instability, has caused enormous life and property loss. Therefore, it is significant to in-depth research the stability of mine slope. A research on the stability of mine slope is of great significant in theory and has profound influence for long-term, sustainable and healthy development of the mining enterprises.The research firstly attempted to take land-based synthetic aperture radar into application to mine dump slope monitoring, combining with the characteristics of radar monitoring and the actual situation of mining engineering meanwhile a preliminary exploration of the site selection and layout has been carried on. It has certain reference significance for the relating research to take the technology for mine slope monitoring in the future.Through the analysis of landslide development rule, the rule of the dynamic evolution of the mine instability was put forward. Landslide development from the trailing edge crack formation, and the longitudinal "dominoes" thrust, lateral diagonal pull traction, then to the axis down gradually, until the breach of sally port, the whole process of dynamic development was given. The relationship between measuring point position and deformation law was offered.By means of field survey, laboratory test and similarity simulation experiment, the dynamic spatial-temporal evolutional laws of slope buckling failure was put forward in this paper. With the same rainfall intensity, particle erosion at the upper of the slope is more serious than lower while with different rainfall intensity, particle erosion rule goes through different stages of mine slope. As to smaller rainfall intensity, surface of slope body goes through stages of fine particle erosion and surface runoff, while for the condition of torrential rainfall intensity, dump slope goes through fine particle erosion stages, skid and shallow erosion and surface runoff phase. For extreme storm conditions, mine slope goes through fine particle erosion, skid and shallow erosion, surface runoff and failure stage.Finally, Based on the analysis of the relationship of displacement information of monitoring and rainfall, the different step load-unload response ratio model, which combines external inducement with the dynamic response of system based on the algorithm and takes the adjacent continuous load and unload as the calculation cycle was given. It reduced calculation difficulty effectively by avoiding loading or unloading term, and the invalid calculation workload. The results indicate that the new model is high efficient and applicable.