Abstract Five years of semi-continuous displacement records from extensometers installed though a concrete mine shaft lining are analysed and interpreted. The data includes multiple episodes of contraction which have amplitudes up to 15 mm in individual extensometers. Detailed analysis of extensometer data suggests transient high stresses occur in the shaft lining. The amplitude, wavelength and frequency of the observed transient stresses gives a unique insight into the progressive redistribution of stress around underground infrastructure during mining. The displacement pattern can be modelled as comprising a circular, elliptiical and translational component. The elliptical flattening direction indicates a consistent north-south compression in most events analysed. The typical duration of the wave events is approximately 5 h indicating a slow creep-like mechanism. Although some events appear to occur on a 24 h cycle, comparison with the mining activity record did not show a close association with the stope excavation sequence.

中文翻译：

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昆士兰矿井引伸计数据中记录的慢应力波

摘要 分析和解释了通过混凝土矿井衬砌安装的引伸计的五年半连续位移记录。数据包括在单个引伸计中振幅高达 15 毫米的多次收缩。引伸计数据的详细分析表明，轴衬中会出现瞬时高应力。观察到的瞬态应力的幅度、波长和频率提供了对采矿期间地下基础设施周围应力逐渐重新分布的独特见解。位移模式可以建模为包括圆形、椭圆形和平移分量。在分析的大多数事件中，椭圆扁平方向表明南北压缩是一致的。波浪事件的典型持续时间约为 5 小时，表明是一种缓慢的蠕动状机制。尽管某些事件似乎以 24 小时为周期发生，但与采矿活动记录的比较并未显示与采场开挖顺序密切相关。