一露天采场高陡边坡危岩体稳定性分析

Stability Analysis of Dangerous Rock Mass in an Open-pit Stope with High and Steep Slope

危岩体是指高陡边坡上被多组不连续结构面切割,在重力、风化营力、地应力、地震、水体等外力作用下与母岩逐渐分离,稳定性较差的岩体。其破坏方式有滑移式、坠落式、倾倒式3种。岩质边坡稳定性分析的方法较多,例如岩体结构分析法、块体理论法、极限平缓法、数值计算法等。以一露天采场高陡边坡上的危岩体为例,采用计算稳定性系数的方法对该高陡边坡上的危岩体进行稳定性分析,根据计算结果及评价验证了采用该方法确定危岩体的稳定性是合理的。

Dangerous rock mass refers to the rock mass with poor stability,which is cut by several groups of discontinuous struc-tural planes on the high and steep slope and gradually separated from the parent rock under the action of external forces such as gravity,weathering,geostress,earthquake and water.There are three kinds of failure modes,sliding,falling and toppling.There are many methods to analyze the stability of rock slope,such as rock structure analysis method,block theory method,limit gentle method,numerical calculation method,etc.Taking the dangerous rock mass on the high and steep slope of an open-pit stope as an example,this paper analyzed the stability of the dangerous rock mass on the high and steep slope by using the method of calculating the stability coefficient.The results of calculation and evaluation verify that the method is reasonable to determine the stability of the dangerous rock mass.