露天地下联合采矿联合保留层参数的自组织优化

Self-Organizing Optimization of the Parameters of the Jointly Reserved Layer for Combined Open Pit and Underground Mining

露天地下联合开采同一矿体时 ,其采动效应相互影响和相互叠加 ,具有自组织特性。利用系统本身的自组织能力 ,采用差分法FLAC的非线性大变形程序进行露天地下联合采矿模拟研究 ,得出了在两种不同空间位置上开采造成边坡位移叠加的结果。将计算得出的边坡最大水平位移与边坡破坏时的极限位移进行比较 ,确定出合理的表征露天地下联合采矿的特征参数———联合保留层厚度 ,从而安全而又快速地实现矿山最终转为地下开采的目的。

When the same orebody is being mined in a combined open pit and underground mining system, there is an interaction and overlapping of mining inducement which exhibits self-organizing behavior. Using the self-organizing ability of the system and the nonlinear big deformation program of the deviation square FLAC, a simulation was carried out of the combined open pit and underground mining system. Mining-induced slope displacement results were obtained at two different spatial positions. A comparison was made between the maximum slope horizontal displacement and the ultimate displacement at a slope failure so as to determine the reasonable thickness of combined reserve layer, a parameter characteristic of combined open pit and underground mining, thereby ultimately turning the open pit mining into underground mining in a safe and quick way.