阶段嗣后充填采场结构参数的多目标多属性优化

来源期刊:中南大学学报(自然科学版)2019年第2期

论文作者:刘志祥 兰明 李夕兵

文章页码:375 - 384

关键词:嗣后充填采场;结构参数;数值分析;响应面法;多目标优化;理想点法

Key words:stage backfilling stope; structure parameters; numerical analysis; response surface method; multi-objective optimization; ideal point method

摘    要:为确定某金矿阶段嗣后充填采场最优开采参数,采用弹性厚板理论,分析不同跨度下顶柱厚度与最大拉应力的关系;结合矿山实际开采条件,通过中心复合试验设计及数值模拟计算得到不同结构参数下的力学响应;构建最大拉应力、最大压应力和最大竖向位移的二阶响应面模型,研究各响应量之间的关系;通过多目标优化及多属性决策的方法最终实现采场结构参数的综合优化。研究结果表明:顶柱最小厚度为4.00 m;矿柱跨度及顶柱厚度对采场力学响应产生显著影响,采场最优开采尺寸是矿房跨度为29.90 m,矿柱跨度为31.40 m,顶柱厚度为5.24 m。

Abstract: In order to determine the optimum dimensions of the stage backfilling stope of a gold mine, the relationship between the roof thickness and the maximum tensile stress under different spans was analyzed by using the elastic thick plate theory. With consideration of the actual mining conditions of the mine, the mechanical responses under different structural parameters were obtained by means of the central composite test design and the numerical simulation. In addition, the second order response surface models of the maximum tensile stress, the maximum compressive stress and the maximum vertical displacement were performed to investigate the relationship among each response. Finally, the comprehensive optimization of stope structural parameters was realized with the multi-objective optimization and the multi-attribute decision making method. The results show that the minimum roof thickness is 4.00 m. The pillar span and roof thickness have significant impact on the mechanical response. The optimal parameters are determined as follows: the scheme of chamber span is 29.90 m, the pillar span is 34.10 m and the roof thickness is 5.24 m.

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