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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Merensky pillar strength formulae based on back-analysis of pillar failures at Impala Platinum
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Merensky pillar strength formulae based on back-analysis of pillar failures at Impala Platinum

机译：基于对Impala Platinum支柱破坏的反分析的Merensky支柱强度公式

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摘要

The Bushveld platinum group metal deposits are two distinct, shallow-dipping stratiform tabular orebodies and strike for many hundreds of kilometres. Mining is extensive, with depths ranging from close-to-surface to 2 000 m. The mining method is a variation of planar open stoping. Pillars are widely used to support the open stopes. Little work has been done in the past to determine pillar strength and pillars have been designed using experience and formulae developed for other hard-rock mines. This has led to oversize pillars with consequential loss of ore or undersize pillars resulting in potential collapses or pillar bursts. This paper describes a back-analysis of pillar failures at Impala Platinum, just north of Rustenburg, and provides insights into pillar behaviour. Strength formulae are presented for Merensky Reef pillars at Impala. These formulae may be used cautiously on other platinum mines with similar geotechnical and geomechanical conditions.
机译：Bushveld铂族金属矿床是两种不同的浅层状层状板状矿体，走向数百公里。采矿范围广泛，深度范围从近地表到2000 m。采矿方法是平面露天采矿的一种变体。支柱广泛用于支撑露天采场。过去几乎没有做任何工作来确定立柱的强度，而立柱是根据为其他硬岩矿山开发的经验和公式来设计的。这导致了超大的柱子，从而导致矿石流失或柱子尺寸过小，导致潜在的倒塌或柱子爆裂。本文描述了在Rustenburg北部的Impala Platinum的支柱故障的反向分析，并提供了有关支柱行为的见解。在黑斑羚（Impala）提出了梅伦斯基礁石柱的强度公式。在具有相似岩土和岩土力学条件的其他铂金矿中，可以谨慎使用这些公式。

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