Study On The Basic Characteristics Of The Xieliupo Landslide And The Prediction Of Blocking The River In Zhouqu County Gansu Province

Landslide is one of geological disaster of the highest frequency of mined-out area in type,Once the landslide instability will bring serious harm to people's life and property.The river of bailongjiang basin in the study area of zhouqu county is the concentrated distribution area of geological disasters,large or giant landslide is develo-pment,the region's population density is bigger,in the event of the loss caused by landslide disaster,especially cause plugging river is enormous.Therefore,the study of the regional landslide is particularly important.Based on the discharge of slope landslide as the research object,on the basis of the basic engineering geological conditions,the basic features of the landslide in detail analyzed;Then,explain the landslide formation mechanism,analyses the discharge of slope landslide deformation and failure mechanism,and carry on the study of numerical simulation.Finally,the application of the theory of engineering geological analysis method,limit equilibrium method for the landslide as a whole and its various secondary sliding body stability evaluation.At the same time,using the discrete element numerical simulation,the situation of the landslide blocking river forecast analysis,and using the theory of landslide kinematics of the landslide possibility the prediction calculation of blocking the height of the river.To obtain the main results are as follows:(1)According to the characteristics of the discharge slope landslide deformation and failure from the trailing edge to leading edge will discharge the slope landslide in turn divided into landslide I area to landslide IV,and on the deformation characteristics of each partition has carried on the detailed description.The stability evaluation and the possible scale forecast of the unstability landslide provides the basis.(2)On the analysis of the main controlling factors of the landslide formation,based on the formation mechanism of the landslide are analyzed;Illustrates the cause of the mechanism of the landslide is mainly by faulting and earthquake action,slip-cracking.(3)According to discharge the slope landslide geological engineering conditions and basic characteristics of the geological model was established,using the finite difference method,the discharge of slope landslide deformation and failure mechanism are simulated,and connecting with the discharge of slope deformation and failure characteristics of landslides and the monitoring data,Discharge of slope landslide deformation damage mechanics model is determined:creep-cracking;At the same time,the deformation and failure mechanism of each partition is elaborated,Landslide I area and landslide ? area is passed type creep cracking,landslide II area for passage drawing composite creep cracking,landslide ? area for traction type creep cracking.(4)On the basis of the partition,according to the discharge of slope landslide deformation and failure characteristics,the projections for discharge scale landslide slope instability is calculated,Then,choose discharge slope landslide ? area as the object of the numerical simulation,Using the discrete element into the process of discharge slope landslide blocking river made a reasonable explanation.Landslide kinematics theory,the different size caused by the instability of the theoretical calculation of blocking river height prediction of landslides blocked river harm was determined.The buckling of the landslide disaster prevention and mitigation provides a theoretical basis.