Stability Analysis Of Dangerous Rock Mass In Jiaozuo Yuntai Mountion Scenic Region

The world geological park in Yuntai Mountain area to the geological landform and its unique cultural landscape attracts many tourists all over the country.In recent years,with the rapid development of the scenic spots,the importance of geological resources of commercial development,ignore its negative effect is becoming increasingly prominent,dangerous rock body of a certain number of development in the area of Redstone gorge,waterfall gorge,springs waterfall gorge,Mastixia peak attractions such as affected by the new tectonic activity,effects of weathering and erosion and human activities,which has threatened the benign development of tourist and the safety of life and property.In this paper,through the analysis of geological data and field geological geomorphological survey,research area of hydrogeology and engineering geology conditions,regional geological features,the number of statistics,rock mass distribution and classification,analysis of the causes of the scenic spots within the rock,establish the instability mechanism of different types of rock mass;on the basis of the geological mechanics principle,calculation method of static analysis by analyzing the load of rock mass,rock failure to establish numerical model,calculate the stability coefficient for the rocks are unstable;the traditional mechanical principle analysis of movement process of rockfall formed rock mass unstable after the application of Rockfall numerical simulation software to calculate rock movement process,and obtain the numerical results the movement trajectory of movement;and according to the numerical trajectory diagram obtained in the process of rock movement,combined with the traditional rock The prevention and control measures of unstable rock mass in unstable state are determined by body control theory.The main achievements are as follows:(1)according to the field investigation and study area were found in rocks 77,mainly distributed in the upper part of the Redstone gorge,peak,valley area,dogwood road and other parts of the slope or steep cliffs;failure type dump sliding,falling three,to fall;the cause is mainly affected by plate tectonics,earthquake,weathering denudation of neotectonic movement and human engineering activities and geological surface effect;application of mechanics principle research on three kinds of rock unstable failure mechanism.(2)to determine the evaluation criteria of the stability of rock body,fissure water pressure and self load analysis of three main effects of gravity and earthquake force ofdangerous rock stability,a dump sliding falling three types of rock failure numerical calculation model,the stability coefficient of statics calculation method of different load combinations of dangerous rock mass stability evaluation of dangerous rock mass,according to the evaluation criteria to determine the stability of rock body,the evaluation of a total of 12 dangerous rock mass in an unstable state,respectively HW3,HW5,HW6,HW11,HW13,HW14,HW15,HW16,GW13,JW20,JW21,JW23,three kinds of failure types are involved.(3)the application of two-dimensional kinematics theory,the moving process of rockfall formed rock instability after analysis involves four stages,namely the initial displacement stage,collision,rolling stage and slip stage;using Rockfall 12 numerical instability state of rock instability after the formation of rockfall,impulse speed,bounce height,displacement and motion data were calculated in simulation software,and obtain the motion trajectory,provide theoretical support for the prevention and treatment of dangerous rock mass.(5)according to the numerical simulation of rockfall results,combined with the actual area of the dangerous rock control technology and commonly used in 12,is in an unstable state of the rock body are respectively provided clear,caulking,flexible active protection,bolting,passive protection,flexible stone dam rock safety and effective prevention suggestions.