基于3DEC数值模拟的矿山边坡关键块体稳定性研究

Study on Stability of Key Blocks in Mine Slope Based on 3DEC Numerical Simulation

以河北钢铁集团研山铁矿节理岩质边坡作为主要研究对象,使用Shape Metri X 3D高精度三维不接触边坡扫描仪对边坡中结构面信息进行采集。通过分析数据得到优势结构面并采用赤平极射投影方法进行边坡临空面中关键块体的搜索,通过矢量运算方法得到关键块体的稳定性系数及失稳模式。并结合3DEC数值模拟软件,建立关键块体的三维模型,反演了不同优势结构面组合下关键块体发生失稳的过程,从而验证了数值计算的正确性,为矿山治理边坡稳定性提供了可靠的科学依据及技术支撑。

Taking the joint rocky slope of Yanshan Iron Mine in HBIS Group Mining Company as the main research object,the 3D Non-contact Slope Scanner called Shape Metri X 3D was used to acquire the structural surface information in slope. The preferred structural plane was obtained by analyzing the data and the key blocks in the scarfing surface of slope were searched by the stereographic projection method. Through the vector operation method,the stability coefficient of and the instability mode of the key block have been obtained separately. With the aid of 3DEC numerical simulation software,the 3D model of key block was established to inverse the instability process of key blocks under different combinations of preferred structural planes,which verifies the correctness of the numerical calculation. This provides a scientific basis and technical support for the slope stability in mine management.