Study On Deformation And Failure Characteristics And Control Of High And Steep Rock Slope

The stability of the high and steep rock slope with joint cracks is different from that of the general slope.Due to the uncertainty of the distribution of the structural plane and joint cracks,the failure characteristics and stability of the high and steep rock slope have special characteristics.Due to the relatively few studies on the stability of high and steep rock slopes with jointed fissures,the understanding of the stability of high and steep rock slopes is not clear enough,leading to the occurrence of landslide disasters.Therefore,in this paper,the stability of the high and steep rock slope with joined-fissure is analyzed by combining theoretical analysis,experimental analysis and numerical simulation with the background of the high and steep rock slope in Xinqiao Copper Pyrite Mine.Through field investigation,the information of slope structural plane and joint plane attitude was obtained,and the strike,dip Angle and filling material of slope joint plane were statistically analyzed.The length and width of joint fissure were obtained from 1?10m and 1?30cm respectively.Because the subjects are all intact rock mechanics test,to live the rest of the need to have further study on joints and fissures in rock mass,thus containing prefabricated crack in rock specimen preparation and biaxial shear test,analysis of joints and fissures of different point of view,the failure types of length,width,and the effect of material,such as rock crack expansion mode,The results show that the peak strength and residual strength of rock materials decrease first and then increase with the increase of inclination Angle between joint and loading direction.When the length and width of the joint crack increase,the peak strength and residual strength decrease gradually,and the reduction range decreases gradually.The peak strength and post-peak residual strength of the specimen were lower than that of the dip Angle due to the width and length of the joints.The peak strength and post-peak residual strength of the specimen are the minimum values when the inclination Angle between the joint crack and the loading direction is 40°?50°.Based on the test results,the rock failure mode is studied and the failure mechanism of the jointed crack slope is analyzed.When the inclination Angle of the jointed crack and the loading direction is less than 45°,the shear failure is the main effect of the slope failure.When the dip Angle is greater than 45°,the slope is unstable due to tensile failure.International airport is based on the joint surface site survey and the combination relationship,combined with the actual engineering geology condition and the test result,establish joint fissure and no inclination to 45° joints and fissures of typical working condition of slope geological model,numerical simulation software FLAC 3 d and strength subtraction,it was carried out on the slope stability calculation,safety factor is obtained.The calculation results show that the stability coefficient of the local slope without joint fractures is 1.02,which is in the understable state.The stability coefficient of the partial slope with jointed crack is 0.998,which is in an unstable state,and further control is needed to ensure its safety.Based on the results of slope stability analysis and calculation,the local control technology scheme of high and steep rock slope is proposed.The stability analysis is carried out by numerical simulation technology to evaluate the stability of high and steep rock slope.Figure[69]Table[14]Reference[91]...