基于地质统计学的资源储量估算参数优选研究
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摘要
借助DIMINE矿业软件,综合运用普通克里格法和距离幂次反比法建立了某矿床钻孔数据库、矿体模型和品位块段模型,采用空间多扇区逐步搜索法获得组合样Au品位的实验变异函数,选择球状模拟进行拟合获取理论变异函数参数。针对不同储量估算方法、椭球体搜索方式、搜索距离和有无次级分块等条件,采用正交试验方法,优选6种资源储量估算方案进行估值,获得不同方案的Au品级-矿石量和Au品级-Au品位分布曲线。结果表明:采用各向异性距离能反映品位分布的各向异性;有次级分块估算的矿石量更准确;根据变程进行椭球体分次搜索可有效避免品位均化。研究成果可为基于地质统计学的矿床资源储量估算方法提供指导。
Based on the study of ordinary Kriging and two kinds of distance power inverse ratio method,a mineral drillhole database,orebody modeling and block modeling were all constructed for a mineral deposit using mining software of DIMINE.The experimental variograms of Au-grade of composite samples were calculated by gradual search method for multi-sector space,to which spherical module was used to be fitted,resulting in the theoretical variogram.Six kinds of mineral reserves estimation were selected for evaluation by orthogonal tests in terms of different reserve estimation methods,ellipsoid methods,ellipsoidal distance and sub-blocking.As a result,curves of Au ratings-ore tonnage and Au ratings-Au grade of different reserve estimation were obtained.After comparison and analysis of the results,it is concluded that: anisotropic distance can be used to reflect the anisotropy of metal grade distribution,more accurate ore tonnage estimation can be obtained by using sub-blocking,and grade homogenization can be avoided by using search ellipsoid based on process change.This research result can provide guidance for geostatistical ore-reserve estimation.
Based on the study of ordinary Kriging and two kinds of distance power inverse ratio method,a mineral drillhole database,orebody modeling and block modeling were all constructed for a mineral deposit using mining software of DIMINE.The experimental variograms of Au-grade of composite samples were calculated by gradual search method for multi-sector space,to which spherical module was used to be fitted,resulting in the theoretical variogram.Six kinds of mineral reserves estimation were selected for evaluation by orthogonal tests in terms of different reserve estimation methods,ellipsoid methods,ellipsoidal distance and sub-blocking.As a result,curves of Au ratings-ore tonnage and Au ratings-Au grade of different reserve estimation were obtained.After comparison and analysis of the results,it is concluded that: anisotropic distance can be used to reflect the anisotropy of metal grade distribution,more accurate ore tonnage estimation can be obtained by using sub-blocking,and grade homogenization can be avoided by using search ellipsoid based on process change.This research result can provide guidance for geostatistical ore-reserve estimation.
引文
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[12]梅晓仁,张瑞新,高永胜,等.地质统计学法在露天矿勘探网度优化中的应用[J].中国矿业大学学报,2003,32(4):459-461.
[13]M V KOK,B ULKER.Reserve Estimation Using Geostatistics[J].Energy Sources,Part A:Recovery,Utilization,and Environmental Effects,2008,30(1/4):93-100.
[14]张明明,周涛发,袁峰,等.长江中下游地区玢岩型铁矿床资源储量估算研究[J].地质学报,2011,85(7):1215-1222.
[15]R Mohan Srivastava.Geostatistics:A toolkit for data analysis,spatial prediction and risk management in the coal industry[J].International Journal of Coal Geology,2013,112:2-13.
[16]李翠平,李仲学,郝秀强,等.地矿工程可视化仿真中品位与储量的计算实现[J].北京科技大学学报,2007,29(9):859-862.
[2]朱青凌,罗周全,刘晓明,等.块体模型储量估算原理的应用研究[J].矿冶工程,2012,32(6):9-13.
[3]梅晓仁,张瑞新.基于VRML的煤矿床三维可视化方法研究[J].中国矿业大学学报,2004,33(6):665-667.
[4]李娟,李翠平,李仲学,等.基于支持向量回归机的矿体品位插值[J].北京科技大学学报,2009,31(12):1498-1502.
[5]R Mohan Srivastava.Geostatistics.A toolkit for data analysis,spatial prediction and risk management in the coal industry[J].International Journal of Coal Geology,2013,112:2-13.
[6]T Y Yunser.A practical application of geostatistical methods to quality and mineral reserve modelling of cement raw materials[J].Journal of the South African Institute of Mining&Metallurgy,2012,112(3):239-249.
[7]刘海英,刘修国,李超岭,等.基于地质统计学法的三维储量估算系统研究与应用[J].吉林大学学报(地球科学版),2009,39(3):541-546.
[8]郭奇峰,刘金辉.析取克里格法在可回采资源量的总体估算的应用[J].中国矿业,2012,21(8):20-22.
[9]李庆谋.多维分形克里格方法[J].地球科学进展,2005,20(2):248-256.
[10]Kalyan Saikia,B C Sarkar.Coal exploration modelling using geostatistics in Jharia coalfield,India[J].International Journal of Coal Geology,2013,112:36-52.
[11]李章林,王平,张夏林,等.距离幂次反比法的改进与应用[J].金属矿山,2008(4):88-92.
[12]梅晓仁,张瑞新,高永胜,等.地质统计学法在露天矿勘探网度优化中的应用[J].中国矿业大学学报,2003,32(4):459-461.
[13]M V KOK,B ULKER.Reserve Estimation Using Geostatistics[J].Energy Sources,Part A:Recovery,Utilization,and Environmental Effects,2008,30(1/4):93-100.
[14]张明明,周涛发,袁峰,等.长江中下游地区玢岩型铁矿床资源储量估算研究[J].地质学报,2011,85(7):1215-1222.
[15]R Mohan Srivastava.Geostatistics:A toolkit for data analysis,spatial prediction and risk management in the coal industry[J].International Journal of Coal Geology,2013,112:2-13.
[16]李翠平,李仲学,郝秀强,等.地矿工程可视化仿真中品位与储量的计算实现[J].北京科技大学学报,2007,29(9):859-862.