Research On Intelligent Prediction And Parameter Sensitivity Of Stability Of High And Steep Rocky Slope

Based on the Huangzangsi Water Conservancy Project in the mountainous area of southwest China,this paper carried out the basic mechanical parameter test of chlorite mica schist,and used the intelligent learning algorithm TensorFlow to determine the stability and damage of the high and steep rock slope on the left bank of Huangzang Temple.The model is used for prediction,the 3DEC numerical simulation is carried out for the high and steep slope on the left bank of Huangzang Temple,and the bonded block model(BBM)and the discrete fracture network model(DFN)are introduced into the construction of the slope model.A complex new slope rock mass structure model suitable for the rock mass structure characteristics of the left bank of Huangzang Temple.The main research results are as follows:(1)Through indoor uniaxial and triaxial compression tests,the evolution law of rock strength changing with schist angle is obtained;the mechanical parameters of natural chlorite schist are higher than those of saturated chlorite schist;different schist angles Different fracture surface forms of rocks;changes in confining pressure lead to changes in the mechanical properties of chlorite schists;and comparing the results of triaxial tests and uniaxial tests to determine the physical and mechanical parameters of the complete chlorite mica schist.(2)The calculation results of the intelligent learning algorithm TensorFlow show that considering the slope height,slope angle,degree of weathering,rock mass structure,groundwater conditions,rock cohesion,friction angle in the rock,whether there is support,and joints Under the 15 factors of internal friction angle,joint cohesion,number of inwardly inclined joints,number of outwardly inclined joints,number of bedding joints,number of oblique joints,and number of effective joints,the learning effect meets expectations.And the prediction of the slope on the left bank of Huangzang Temple is closer to the real slope.(3)The BBM-DFN coupling numerical model was established based on the actual situation of the cliff slope on the left bank of Huangzang Temple,and the study was carried out by using the multi-factor strength reduction method and sensitivity analysis of parameters.Through the optimal reduction method,the safety factor of the steep cut is 1.85.Through the sensitivity analysis of meso-joint parameters,it is found that the change of cohesive force,tensile strength parameters,chipping Angle and block size will affect the stability and failure mode of the slope,but the change of internal friction angle has little effect on it.