【摘要】 了解矿区初始地应力场分布规律是进行巷道设计、支护计算和稳定分析的前提条件。依据淮南望风岗矿区现场地应力测试资料,对初始地应力场进行反演分析。通过采用具备全局优化能力的变参数DCD(dynamic canonical descent)算法,避免了非线性反演中一般优化算法仅收敛到局部最小值的状态,提高了反演算法的可靠度;通过在优化反演的程序中,调用ABAQUS进行有限元计算,提高了计算分析速度。对实测点的反演值与现场实测值进行了比较,两者在量值及其方向上接近,表明变参数DCD算法显示出了良好的非线性反演能力,较合理的给出了初始地应力场的分布规律。更多还原

【Abstract】 The understanding of initial geostress field distribution law is the precondition for the design of mine roadway and its supporting calculation and stability analysis. According to the measured geostress data of Wangfenggang mine in Huainan,the back analysis of initial geostress field was made. In the nonlinear back analysis,a mutative dynamic canonical descent( DCD) algorithm with capability of global optimization was introduced to avoid the convergence to a local minimum value,so the reliability of back analysis was improved. ABAQUS software was called for finite element calculation in the optimal back analysis program,the speed of back analysis was improved. The comparison be-tween computed and measured geostress values of measuring points was made,the result showed that the two was similar in direction and value,this demonstrated that mutative DCD algorithm is a good nonlinear back analysis method which can reasonably give distribution law of initial geostress field.更多还原