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本文介绍在加拿大矿山应用微震技术描绘活性裂隙、评估应力变化以及判断大规模震动和发生岩爆条件的研究。该研究表明:可利用微震法判断活性裂隙的方位、确定异常应力区范围以及可能发生岩爆的区域、掌握局部应力对剪切破坏所起的作用,并且可确定与远距离诱发岩爆相关的应力变化路径。岩爆可能发生的特征是沿断层面方向微震显著增加并伴随有效应力增高。因此,微震分析法可作为远距离监测采矿引起的岩体性态变化的方法。
This article presents a study of applying microseismic techniques to characterize active fractures, assessing stress changes, and judging large-scale vibrations and rock burst conditions in Canadian mines. This study shows that microseismic method can be used to determine the orientation of active fractures, determine the range of anomalous stress zones and areas where rockburst may occur, grasp the role of local stresses in shear failure, and determine the correlations with long-range induced rockbursts Stress change path. A probable characteristic of rockburst is the significant increase in microseismicity along the fault plane with an accompanying increase in effective stress. Therefore, microseismic analysis can be used as a method of long-distance monitoring of the change of rock mass caused by mining.