Research On Mechanism Of Slope Instability Induced By Caving Mining Method

The hanging mines are due to various factors that remain in the orebody under the open-air final slope.The core of induced caving combined with non-pillar sublevel caving is to use artificial method to make slope rock mass collapse so as to achieve the purpose of mining and hanging ore.The application of this method will lead to the large-scale instability of the slope.Therefore,it is necessary to study the slope stability.In this paper,a numerical model of tensile failure is established to study the instability of slope under different conditions.When the influence of slope dip angle,orebody dip angle and orebody burial depth on the slope stability is considered.The results show that when other conditions are fixed,the slope dip angle is greater than 40,the orebody dip angle is less than 30,and the orebody burial depth is less than 115 m.The slope is very destructive and the goaf can not fully accommodate loose rock mass and can not guarantee the safety of production.Considering the weak layer length,depth and dip angle of three factors to explore the effects of different conditions of weak layer on the slope stability,the results show that the longer the length of the weak layer,the smaller the angle,the greater the effect on the slope range.Considering the influence of weak layer parameters on slope stability,three parameters are selected to simulate.The results show that the larger the value of elastic modulus,the less likely the slope is damaged.In this paper,whether the mined area formed by mining can accommodate the loose rock mass caused by the collapse of the slope and the slope instability range are used as judgments basis to discuss whether this method can ensure the production safety under different conditions and provide a certain reference for the actual slope engineering.