长期矿震作用对露天矿边坡岩体状态的影响研究.

To study the influence of long-term mine earthquakes on the stress-strain state of slope rock mass and the possibility of influence accumulation, a mine earthquake scene was set to simulate the change of rock mass state in the process of mine earthquakes. The scene is set as 45 years, divided into 9 simulations, and the period is 5 years. In each period, there are 3 times mine earthquakes with magnitude 3 randomly. The representative rock mass state characterization quantities, including plastic zone, displacement and the maximum principal stress, are selected to analyze the law. This paper studies the action forms of mine earthquakes on open pit mine slope, analyzes the reasons for the change of rock mass state caused by these actions, and establishes the relationship between the plastic zone, displacement, the maximum principal stress and mine earthquake vibration. The results show that the displacement of rock mass is mainly affected by mine earthquakes, followed by the plastic zone, and the influence on the principal stress is very small. It has a great influence on the plastic zone and displacement of rock mass with large elevation difference, and the cumulative effect of displacement is obvious, while the cumulative effect of plastic zone is small. It has little effect on the principal stress and does not accumulate. In the long run, the weakening of slope rock mass caused by mine earthquakes is a long-term cumulative process. Only when the rock mass structure is loose can the mine earthquake quickly lead to landslide instability. [ABSTRACT FROM AUTHOR]