Assessing stope performance using georeferenced octrees and multivariate analysis

B. McFadyen, M. Grenon, K. Woodward, Y. Potvin
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引用次数: 1

Abstract

ABSTRACT This paper presents the first steps towards a new stope design approach, where stope overbreak (OB; rock mined outside of the design) and underbreak (UB; planned rock left behind) is assessed using statistical multivariate analysis (principal component analysis [PCA] and partial least square [PLS]) and georeferenced data measured at an approximately cubic metre resolution (octrees). Results showed that OB is observed in areas of the stope where there is a large blasting energy proxy, large undercut and towards the middle of the face. UB tends to be observed near the border of the faces and where there is large blasting standoff and toeing of the rings. The resolution of the data and the use of multivariate analysis have enabled the depiction of an accurate interpretation of the variation of stope performance along the design surface, going beyond the simple per face analysis.
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利用地理参考八叉树和多变量分析评估采场性能
本文介绍了一种新的采场设计方法的第一步,其中采场超断(OB;在设计外开采的岩石)和溃底(UB;使用统计多变量分析(主成分分析[PCA]和偏最小二乘[PLS])和以大约立方米分辨率(八叉树)测量的地理参考数据对规划遗留岩石进行评估。结果表明:在采场爆破能量代理大、切槽大、靠近工作面中部的区域出现OB;UB倾向于在面边界附近以及有大爆破距离和环的脚趾处观察到。数据的分辨率和多变量分析的使用使得沿着设计面的采场性能变化的描述能够准确解释,而不是简单的逐面分析。
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来源期刊
CiteScore
2.20
自引率
9.10%
发文量
5
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