| The slope landslide of open-pit mine slope is primarily caused by slope stability. It is a problem of security technologies that is encountered and should be solved firstly in the process of mining design and production, and the slope stability has been attached high importance at home and abroad. Over the years, a lot of researches, with a combination of theories and examples, has formed a mature method for analyzing the stability of the slope and generality, and has high use value. However, different open-pit mine has different characteristics, for every slope is unique, and the use of analysis methods are also different.Aiming at the landslide events happened in black Cloudy Bay adai groove of open-pit mine, related literatures and research project of a preliminary bold ideas under the main influencing factors of landslide for water, is based on the comparison of4outer dumps around the black site adai ditches mine-north rows, west, east and eastern refuse dump, against an inner dump. The influence of the content is as follows:Cloudy Bay mine bears the larger drained stripping because of the2013stope diversion through data access and the field investigation. Moreover, the coal drainage of southern cloudy bay has soaked into the cloudy bay base for a long time, leading to the die-off of basic bearing capacity and affecting its stability.With the application of engineering geological drilling, geological drilling samples of landslide area are used to make an indoor geotechnical physical and mechanical test. Through indoor test and the comprehensive research of back analysis, it can be determined that the shear strength indexes of the sliding zone. Through the comprehensive analysis of engineering geological, hydrogeological conditions and geotechnical physical mechanics, the cause of landslide.in Cloudy Bay has been basically found.The physical and mechanical parameters conducted by the back analysis, combining with SLOPE/W to calculate Cloudy Bay section YW-1,2, YW-3YW-SLOPE safety factor, and according to this to establish YW-1profile as the main research object. Adopting the method of dumping pressure feet, the weight of rock mass slope bottom area has increased, improving the whole sliding resistance of landslide area; but eliminating the free surface of the cut on the potential sliding body, and inhibiting the potential sliding body along the critical slip surface cut exported removal function to enhance the overall stability of the slope. Considering the presser foot to+1170m and+1200m flat, the two cases, using the limit equilibrium analysis to select typical profile and make sure the dumping stability gotten by pressure foot satisfy the requirement after these two situations.Setting a ground waterproof and drainage system in the dumping region of pressure foot. Designing and adopting the comprehensive waterproof and drainage system which is a four-in-one combined with using, display, storage and taking.Based on Lagrange explicit difference (FLAC) infinite difference method, the discharged adopts Moore-coulomb model according to Cloudy Bay mine engineering geological model. The bedrock adopts ideal elastic-plastic model to depict, and the slope inclined length of560m, vertical slope top height is135m, setting up FLAC3D calculation model to make a numerical analysis of the slope stability after dumping slope governance. |
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