Research On Deformation And Instability Mechanism Of Perilous Rock And Its Control Techniques

The stability of rock slopes under the action of earthquake is one of the hot topics in slope engineering. Our country is mountainous and seismic. There were many strong earthquakes happened in history. Slope failure during earthquake that is comman occurance. Recently, recognition of dangerous rock hazard has been focused on and plenty of research gained some achievements. On the base of research production this paper study dynamic the stability of wedge-shaped perilous rock, which combines with the project"the tridimension dynamic stability analysis and disposition of the rock wedge-shaped block"by Chongqing communications research & design institute. The main study contents were represented as follows:Firstly, Research on the formation condition and influencing factors of the perilous rockAccording to mechanism of unstable rock, author classified the formation conditionand and influencing factors related internal factors and external factors. Empirical computation of seismic force and control fissure in unstable rock were analyzed.Secondly, Research on dynamic analysis of perilous rockOn the base of qualitative and quantitative analysis, This paper calssified dynamic analysis computation of perilous rock,which mainly include analysis of engineering geology, compared identification method, static force analytical method, numerical simulation method, reliability method and model test method. The paper detail analyzed static force analytical method and fast lagrangian analysis of continua . This paper used FLAC3D simulating the dynamic analysis of the perilous wedge-shaped rock, which come to the important conclusion that the perilous rock destructs from control fissure in unstable rock, acceleration of seismic force on gridpoint are different in rock mass slope and perilous rock.Thirdly, Simulate the falling path of perilous rockThis paper used Rocfall simulating the falling path of perilous rock ,which came to the important conclusion that can determine disaster region, thus which can provide evidence for prevention measures.Fourthly, Research on the control techniques of perilous rockControl techniques of perilous rock can classify three types, active methods, passive methods and disaster warning, which combined with preventive and controlling principle and analyzed the formation condition of the perilous rock.