K400 Dangerous Rock Mass Deformation And Failure Mecha Nism And Stability Analysis Of Blasting Vibration

Based on the detailed investigation of the dangerous rock body about engineering geolog ical conditions and the analysis of the dangerous rock monitoring data,the structure characte ristics and deformation characteristic of the dangerous rock body in the slope were analyzed a nd summarized.Moreover,the formation mechanism and instability mode of the dangerous rock were estimated.Finally,the early warning model and warning criterion were studied an d the following understanding was mainly obtained:(1)Based on the research of engineering geological condition of dangerous rock mass,it s mechanism of formation and failure model have been analyzed.A landform with high and st eep slope are the necessary condition and the hard lime rock mass exists in the steep cliff is th e material basis of forming dangerous rock body,the intense tectonics and weathered unloade d which formed joint fissure,that provide geometric boundary for forming dangero us rock.B auxite mining is an important inducing factors which lead the formation and development of dangerous rock.The possible failure model of dangerous rock is the transformation from topp ling deformation to slipping deformation which according with b ed rock aspect and Sliding fa ilure finally.(2)By analyzing monitoring data of the dangerous rock mass,the characteristics of the deformation of precarious rock mass have been studied.4 rocks is the maximum amount of d eformation in the X direction,followed by Z direction,and Y direction displacement amount i s minimum.A steady rise in the X direction of the deformation can be observed.Deformation in Z direction can be regarded as uniformdeformation.Deformation in Y direction did not change significantly,so it can be considered as stable.There are total 4 toppling deformation of dangerous rock mass.(3)through the analysis of monitoring data,respectively,it is concluded that the local co llapse deformation failure mode is dumping destruction,as part of the macroscopic overall co llapse,can't decide macro overall collapse failure mode.By analyzing qingchuan 4.5 earthqua ke deformation rate curve analysis,and the characteristics of sliding zone soil strength,it is c oncluded that the dumping of the deformation features of non-control deformation,the failure modes of the collapse of macroeconomic for sliding mode.From the collapse of the slope bo dy found extrusion failure analysis,also shows that the collapse of the body of the lateral extr usion phenomenon,and further proved this conclusion.(4)the detailed analysis of the effects on the stability of the partial collapse of the blasti ng construction,the most dangerous of 1 # wedge,2 #,3 # 2-collapse body stability evaluati on,the overall conclusion is: in certain controll blasting construction of the condition will not result in a collapse of instability.