基于客观赋权物元分析的中深孔采场采空区稳定性研究  

Stability Evaluation of Mined-out area in Medium-deep Hole Stope Based on Entropy Weight Extension Matter-Element Model

作　　者：王堃 刘立顺 沐兴旺 孙承超 卞继伟 WANG Kun;LIU Lishun;MU Xingwang;SUN Chengchao;BIAN Jiwei(BGRIMM Technology Group,Beijing 102628,China;National Center for International Research on Green Metal Mining,Beijing 102628,China;Yiliang Chihong Minging Co.,Ltd.,Zhaotong 657600,China)

机构地区：[1]矿冶科技集团有限公司,北京102628 [2]国家金属矿绿色开采国际联合研究中心,北京102628 [3]彝良驰宏矿业有限公司,云南昭通657600

出　　处：《有色金属工程》2024年第10期107-115,共9页Nonferrous Metals Engineering

基　　金：国家重点研发计划项目(2022YFC2903804);矿冶科技集团有限公司科研基金资助项目(04-2362)。

摘　　要：针对中深孔采矿采空区稳定性评价中随机性、动态性等问题,提出了一种基于改进熵权法与物元分析法的中深孔采场采空区稳定性评价方法。综合考虑了环境、地质及工程三个方面,选取了最大地应力等14个评价指标,利用改进熵权法对评价指标进行客观赋权,构建了客观赋权物元分析模型,制定了一套中深孔采场空区稳定性分级标准。以毛坪铅锌矿河西区H8矿体为研究对象,对沿矿体走向布置的中深孔采场采空区进行稳定性评价。采用数值模拟手段反演了中深孔采矿、充填过程,分析了中深孔采矿后采空区围岩的应力、塑性区以及位移结果,对比验证了中深孔采场采空区稳定性评价方法的可行性。结果表明,毛坪铅锌矿河西区H8矿体中深孔采场空区级别变量特征值为2.27,即B(较稳定)等级,结合现场设备能力及矿体形态,可进一步开展采场结构参数优化工业试验。该模型克服了评价指标权重分析主观性,结果准确,可指导中深孔采场结构参数选定及优化,保障中深孔采场安全高效回采,同时为类似地下矿山中深孔开采技术应用提供理论支撑。To address the problems of randomness and dynamics in the evaluation of the stability of the mined-out area in medium-deep hole mining,a method of evaluating the stability of the mined-out area in medium-deep hole mining based on the improved entropy weight method and the object element analysis method was proposed in this paper.Considering three aspects of environment,geology and engineering,14 evaluation indexes such as maximum geostress were selected,the improved entropy weighting method was utilized,and the 14 evaluation indexes were objectively assigned.An objectively empowered elemental analysis model was constructed,and a set of grading standards for the stability of the mined-out area of medium-deep hole mining was formulated.Taking H8 ore body of Hexi district of Maoping lead-zinc mine as the research object,the stability evaluation of the mined-out area of medium-deep hole mining arranged along the strike of the ore body was carried out.Numerical simulation was used to invert the process of medium-deep hole mining and filling,and analyze the results of stress,plastic zone and displacement of the rock in the mined-out aera after medium-deep hole mining,so as to compare and verify the feasibility of the method of evaluating the stability of the mined-out aera in the medium-deep hole stope.The results show that the eigenvalues of the variables of the medium-deep hole stope mined-out area level in the H8 ore body of the Hexi district of Maoping lead-zinc mine are 2.27,i.e.,B(more stable)grade,and combined with the capacity of on-site equipments and the morphology of the ore body,the industrial test of optimization of the stope structural parameters can be further carried out.The model overcomes the subjectivity of evaluation index weighting analysis,and the results are accurate,which can guide the selection and optimization of the structural parameters of the medium-deep hole mining field,guarantee the safe and efficient mining of the medium-deep hole mining field,and at the same time provide theoretical su

关 键 词：中深孔采场 客观赋权 物元分析 稳定性评价 

分 类 号：TD853[矿业工程—金属矿开采]