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首页> 外文期刊>International Journal of Rock Mechanics and Mining Sciences >CROWN PILLAR STABILITY ASSESSMENT IN AN UNDERGROUND COPPER MINE USING ACOUSTIC EMISSION
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CROWN PILLAR STABILITY ASSESSMENT IN AN UNDERGROUND COPPER MINE USING ACOUSTIC EMISSION

机译：声发射法在地下铜矿山中的顶柱稳定性评估

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摘要

Impending failure in stressed rocks can often be predicted by the pattern of Acoustic Emission (AE). A fundamental difference between acoustic emission and other techniques involving wave propagation is that a wave is generated & transmitted in the rock itself in case of acoustic emission as opposed to being introduced into the rock by an external source. The transition from stable to unstable cracking is marked by rapid rise of stronger events and a declining trend of weaker events during the course of rock deformation. The paper deals with the study involving analysis of the characteristics of the individual AE signals, and analysis of AE events sequence including time sequences and frequency-count patterns at Khetri Copper underground mine of Hindustan Copper Limited to assess the crown pillar stability at 300 m level. The crown pillar stability came into focus when the borehole extensometer (BX6) showed cumulative displacements but a load cell installed beside it displayed no increase in load.
机译：通常可以通过声发射（AE）模式来预测应力岩石中即将发生的破坏。声发射与其他涉及波传播的技术之间的根本区别是，在发生声发射的情况下，在岩石本身中会生成并传输波，而不是通过外部源将其引入岩石中。从稳定的开裂到不稳定的开裂的特征是，在岩石变形过程中，较强的事件迅速上升，而较弱的事件则呈下降趋势。本文进行的研究涉及分析单个AE信号的特征，并分析印度斯坦铜业有限公司Khetri Copper地下矿山的AE事件序列，包括时间序列和频率计数模式，以评估300 m水平的顶冠稳定性。当井眼引伸计（BX6）显示出累积位移时，但其旁边安装的称重传感器未显示出负荷增加的情况，因此凸台柱的稳定性成为焦点。

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