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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Keyblock stability analysis of longhole stopes
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Keyblock stability analysis of longhole stopes

机译：长孔停止的keyblock稳定性分析

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The orientations of discontinuity sets and major geological structures greatly influence the stability of an excavation. Excavations should therefore, where possible, be orientated such that major discontinuity sets and structures are considered, allowing the likelihood of rockfalls in a longhole stope to be kept to a minimum. The longhole stopes are non-entry excavations, which are remote cleaned to avoid exposure of personnel. However, excessive rockfalls can significantly influence productivity and cause damage to mining machinery. This paper presents a risk-based approach to design, where the failure potential of mining stopes for the Platreef mine was determined considering the influence of major structures. The probabilistic keyblock analysis software JBlock was used in this capacity. In this study, the failure potential of keyblocks was determined in JBlock for the longhole stopes of various proposed orientations, considering structural domains and a major geological fault which was identified across the project area. Results of the analysis indicated that stopes orientated sub-parallel to Platreef s major fault (Tshukudu Fault) resulted in the largest rockfalls. Overall, JBlock was used successfully as a design tool to assess the stability of the longhole stopes. Outcomes of the study have provided Platreef mine with valuable infonnation that will assist in the decision-making process when finalizing stope orientations. This study therefore attempts to serve as a reference point for solutions to similar situations, with the objective that risk-based designs are called upon more frequently in the future.
机译：不连续集合的方向和主要地质结构极大地影响了挖掘的稳定性。因此，在可能的情况下，挖掘应考虑到使得考虑主要的不连续组和结构，从而允许长孔落的可能性保持在最低限度。长孔停止是非进入挖掘，遥远的清洁，以避免曝光人员。然而，过度的岩石可能会显着影响生产力并导致采矿机械损坏。本文提出了一种基于风险的设计方法，考虑到主要结构的影响，确定了Platreef矿山矿山停止的故障潜力。概率键盘分析软件JBLOCK以这种容量使用。在这项研究中，考虑到结构域和在项目区域中确定的主要地质故障，在Jblock中确定了Keyblocks的失效潜力。分析结果表明，止止到Platreef S的主要故障（TShukudu故障）导致最大的岩石。总的来说，JBLOCK成功使用作为设计工具来评估长孔停止的稳定性。该研究的结果提供了Platreef Mine，具有有价值的信息，可在最终确定Stope方向时协助决策过程。因此，该研究试图作为对类似情况的解决方案的参考点，其目的是在未来更频繁地调用基于风险的设计。

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