基于主成分分析法的嗣后充填采场矿柱及充填体强度研究  

Study on Pillar Width and Backfill Strength of Subsequent Filling Stope Based on Principal Component Analysis

作　　者：王作鹏 金爱兵[2] 庞如顺 孙文斌 陆通 WANG Zuopeng;JIN Aibing;PANG Rushun;SUN Wenbin;LU Tong(Shandong Dongping Hongda Mining Co.,Ltd.,Tai'an,Shandong 271509,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]山东东平宏达矿业有限公司,山东泰安市271509 [2]北京科技大学土木与资源工程学院,北京100083

出　　处：《矿业研究与开发》2023年第3期45-52,共8页Mining Research and Development

基　　金：国家自然科学基金资助项目(52174106)。

摘　　要：空场嗣后充填矿山采场留设矿柱是地下采矿空间的重要结构,其尺寸会影响矿山生产安全、资源回采率以及企业经济效益,针对此类问题,以大牛铁矿为研究背景,基于主成分分析法(Principal components analysis, PCA),根据数值模拟获得的不同矿柱宽度和充填体强度下矿柱最大压应力和剪应力、位移及塑性区占比,构建矿柱稳定性综合评价指标;并以矿柱稳定和经济效益最优为目标,最终确定矿柱宽度和充填体强度。研究表明:(1)融合数值模拟得到的矿柱压剪应力、变形和塑性区的PCA综合评价指标显示,当充填体单轴抗压强度σ=1.5 MPa时,矿柱宽度b=9 m可保证稳定;(2)当矿柱宽度b=10 m时,充填体单轴抗压强度σ可降低至0.5 MPa;(3)当b=10 m、σ=0.5 MPa时,矿柱稳定和矿山效益综合最优。研究方法和成果可供类似工程借鉴。The pillar reserved in the stope of the open stope and subsequent filling mine is an important structure of the underground mining space, and its size will affect the mine production safety, resource recovery rate and enterprise economic benefits. Aiming at such problems, taking Daniu Iron Mine as the research background, based on the principal component analysis(PCA), the maximum compressive stress, the maximum shear stress, the displacement and the plastic zone proportion of the pillar under different pillar widths and backfill strength were obtained by numerical simulation. Therefore, comprehensive evaluation indexes of pillar stability were established. The pillar width and backfill strength were finally determined with the goal of pillar stability and optimal economic benefits. The research results are drawn as follows. Firstly, PCA comprehensive evaluation index of compressive shear stress, deformation and plastic zone of pillar obtained by numerical simulation shows that when the uniaxial compressive strength of backfill σ is 1.5 MPa and the pillar width b is 9 m, the stability can be ensured. Secondly, when b is 10 m, σ can be reduced to 0.5 MPa. Thirdly, when b is 10 m and σ is 0.5 MPa, the pillar stability and mine benefits are the best. The research methods and results can be used as reference for similar projects.

关 键 词：嗣后充填 采场矿柱 充填体强度 主成分分析 综合评价 

分 类 号：TD853.391[矿业工程—金属矿开采]