摘要
为提高某矿回采效率,扩大生产能力,对采场结构参数进行优化。运用ANSYS对12种不同采场结构参数进行了数值模拟分析,得出各个方案采场最大主应力、顶板沉降量、两帮位移量和最大拉应力指标值,分析后保留采场宽、高分别为15 m和14 m以下的9种可行方案;采用正交试验极差法(R法)对这些方案模拟所获取的指标值进行显著性分析计算,确定采场最优宽高组合为宽9 m,高14 m;将最优采场结构应用于现场试验,并对试验采场顶板下沉量进行了实测,模拟结果与实测相对误差为7.48%,模拟结果准确性较高。试验结果表明,采用该法优化的采场结构参数不仅能够保证采场的安全稳定,而且能够大幅提高采场生产能力和回采效率。
For improving the recovery efficiency of mining and increasing its productive capacity, the realization of the optimization of stope structure parameters requires following steps.Firstly, ANSYS software is adopted to carry out the numerical simulation analysis for the stope structural parameters of the twelve different mining programs, and then the relative targeted values are figured out, such as the maximum main stress of a stope, roof subsidence,sides displacement and maximum tension stress.After the careful analysis and selections,the following nine various feasible programs are finally selected out and each stope with the height of less than 14 m and the width of less than 15 re.Secondly, the orthogonal test range method （R Method） is carried out to take the significance analysis and calculation for the targeted values,which are obtained through the demonstrations of above programs, and finally we affirm that the optimal combination of the width and the height of the stope structure is respectively 9 m and 14 m.By applying the optimal stope structure into the field experiment, and taking the actual measurement for the roof subsidence of the stope, we come to obtain the maximum value with 19.91 mm, which makes the relative error of 7.48% comparing with the simulated results.Thus it shows and verifies the high accuracy of the simulated result.The finished stope experiment shows that if the optimal structural parameters by using the ANSYS-R method is carried out,which can not only ensures security and stability of the stope,but also can greatly improve the recovery efficiency and productive capacity of the stope.This method is also proved to be reasonable and reliable through the above experiment, and so that it can provide a decision-making basis for optimization ofstope structure parameters design.
出处
《黄金科学技术》
CSCD
2015年第6期81-86,共6页
Gold Science and Technology
基金
国家高技术研究发展计划(863计划)项目"地下金属矿开采智能调度与控制"(编号:2011AA060407)资助
关键词
数值模拟
采场结构
极差分析
numerical simulation
stope structure
the range analysis
