地下矿山采场结构参数的核主成分分析法优化
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摘要
针对华联矿业卧虎山矿地下开采工程技术条件,采用正交法设计了9组试验方案,基于Dimine-Midas/GTS-FLAC~(3D)耦合技术建立了采场计算分析模型,获得了不同参数下采场的力学特征值,确定了最大拉应力等9个评价指标,利用核主成分分析法建立了采场结构参数的综合评价模型,基于评价函数值优选采场结构参数。结果表明,运用正交试验,有效减少了计算的工程量,提高了分析效率,获得了不同采场结构参数和充填强度下的力学特征值;核主成分分析方法确定最优采场结构参数为矿柱宽3 m、采场宽10 m、矿柱高12.5 m、充填体弹性模量0.1 GPa;与主成分分析法结果对比,2种方法评价结果基本一致,证明了核主成分分析的适用性,更加突出了多因素的综合评价特征。
In view of the technical conditions for Wohushan underground mine of Hualian Mining Company,nine sets of schemes were prepared with orthogonal experimental design,and a stope computation and analysis model was established based on Dimine-Midas/GTS-FLAC~(3D)coupling technique,with which mechanical characteristics of stope with different parameters were obtained,thus 9 evaluation indicators including the maximum tensile stress were determined.Then,a comprehensive evaluation model was established for the stope structural parameters by use of kernel principal component analysis(KPCA)and the structural parameters were optimized with the evaluating function values.Results showed that the orthogonal experimental design effectively reduced the calculated engineering quantity and improved the analysis efficiency,from which mechanical characteristics of stope with different structural parameters and with different backfilling strength were obtained.By means of KPCA,the optimal structural parameters of stope were determined as follows:pillars of 12.5 m in height and 3 m in width,stope of 10 m in width,as well as elastic modulus of 0.1 GPa for the fillings.Based on the comparison with principal component analysis,it is found that two methods can lead to the almost same evaluation results,indicating that KPCA can be used for comprehensive evaluation with multi-factors,with wide applicability.
In view of the technical conditions for Wohushan underground mine of Hualian Mining Company,nine sets of schemes were prepared with orthogonal experimental design,and a stope computation and analysis model was established based on Dimine-Midas/GTS-FLAC~(3D)coupling technique,with which mechanical characteristics of stope with different parameters were obtained,thus 9 evaluation indicators including the maximum tensile stress were determined.Then,a comprehensive evaluation model was established for the stope structural parameters by use of kernel principal component analysis(KPCA)and the structural parameters were optimized with the evaluating function values.Results showed that the orthogonal experimental design effectively reduced the calculated engineering quantity and improved the analysis efficiency,from which mechanical characteristics of stope with different structural parameters and with different backfilling strength were obtained.By means of KPCA,the optimal structural parameters of stope were determined as follows:pillars of 12.5 m in height and 3 m in width,stope of 10 m in width,as well as elastic modulus of 0.1 GPa for the fillings.Based on the comparison with principal component analysis,it is found that two methods can lead to the almost same evaluation results,indicating that KPCA can be used for comprehensive evaluation with multi-factors,with wide applicability.
引文
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[2]程健,张钦礼,薛希龙,等.基于AHP和TOPSIS法的采场结构参数优化研究[J].矿冶工程,2014,34(1):1-5.
[3]王洪武,吴爱祥,杨仕教,等.基于GA-模糊可靠度的采场结构参数优化设计[J].武汉理工大学学报,2010(9):89-92.
[4]汪伟,罗周全,秦亚光,等.无底柱深孔后退式崩矿法采场结构参数优化[J].东北大学学报自然科学版,2016,37(4):578-582.
[5]周科平,翟建波,高峰,等.缓倾斜薄矿体采场伪倾斜布置及参数优化研究[J].广西大学学报自然科学版,2012,37(2):376-381.
[6]杨宫印,陈玉明,王小勇.马鞍山2#矿体无底柱分段崩落法结构参数优化研究[J].矿冶工程,2017,37(2):24-27.
[7]高宏宾,侯杰,李瑞光.基于核主成分分析的数据流降维研究[J].计算机工程与应用,2013,49(11):105-109.
[8]胡伟鹏,胡海峰,顾建权,等.核主成分分析网络的人脸识别方法[J].中山大学学报自然科学版,2016,55(5):48-51.
[9]喻敏,王斌,王文波,等.联合EMD与核主成分分析的激光陀螺信号消噪[J].武汉大学学报信息科学版,2015,40(2):233-237.
[10]Jolliffe I T.Pricipal Component Analysis(2nded)[M].New York:Springer,2002.
[11]邓红卫,胡普仑,周科平,等.采场结构参数敏感性正交数值模拟试验研究[J].中南大学学报自然科学版,2013,44(6):2463-2469.