The inversion of the seismic moment tensor allows for a characterization of failure components. An original technique is proposed, using time domain equivalent low-frequency spectral displacements with first arrival polarities attached. The identification of each particular wave-type is based on wave energy functions and polarization criteria. The technique is applied to microseisemic events recorded at the Kidd mine, Ontario, with their underground microseismic array. This array includes 20 uniaxial and 8 triaxial accelerometers and monitors a volume of about 300 X 300 X 400 m. Inversions are carried out for pure shear, complex shear, and a general mechanism, including both shear and tensile components. The results show that distinct mechanisms are responsible for the stress transfer effects observed in different regions of the mine. Events that occur within a pillar on the 4,700 Level have positive tensile components, whereas events that occur outside the orebody are characterized as pure-shear failures, similar to those induced in a fractured rockmass on the 5,600 Level.
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机译：地震矩张量的倒置可以表征破坏分量。提出了一种原始技术，使用时域等效低频频谱位移并附加了第一到达极性。每种特定波类型的识别都是基于波能量函数和极化准则。该技术应用于在安大略省的基德（Kidd）矿场及其地下微震阵列记录的微震事件。该阵列包括20个单轴和8个三轴加速度计，并监视约300 X 300 X 400 m的体积。可以对纯剪切，复剪切和包括剪切和拉伸分量在内的一般机制进行反演。结果表明，在矿山不同区域观察到的应力传递效应是由不同的机理引起的。在4,700级的柱子内发生的事件具有正的拉伸分量，而在矿体外部发生的事件则被表征为纯剪切破坏，类似于在5,600级的裂隙岩体中引起的事件。
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