大规模多中段矿体回采顺序优化研究

Optimization Research on the Stoping Sequence of Orebody with Large Scale and Multiple Sublevels

传统数值模拟分析方法主要采用定量分析模型的位移和应力、定性分析模型的塑性区,因而在多个相似方案比较时,经常会出现定量结果很相近而定性结果的说服力又不强的尴尬局面。为此,提出塑性区量化的"破坏比例"概念来解决优化方案区分问题。在FLAC3D数值模拟的基础上,采用FISH语言编程,统计得出研究区域的位移、应力和塑性区"破坏比例",实际案例应用证明,综合传统的分析方法和"破坏比例"法分析模拟结果,各方案的优缺点一目了然,这一改进方法也弥补了数值模拟软件在塑性区分析时只能定性的不足。

The traditional numerical simulation, mainly using the displacement, stress and plastic zone of quantitative analysis method, often leads to the similar quantitative results and the unpersuasive qualitative results in the contrast of multiple similar schemes. Therefore, a quantitative concept, calling failure rate of plastic zone, was proposed to solve the distinguish problems of optimization scheme. Based on FLAC^3D numerical simulation, the displacement, stress and failure rate of stopes were obtained by FISH language pro- gramming. The applications of actual cases showed that the advantages and disadvantages of each scheme were very clear at a glance by comprehensively using traditional method and ＂failure rate＂ method to analyze the simulation results. The improved method also recovered the shortage of numerical simulation software, which only could be used for qualitative research during analyzing the plastic zone.