Based on the theory of multi-phase media continuum mechanics, the coupling instability theory of coal-methane outburst is proposed under finite deformation.

本文在多相介质力学的理论基础上，提出了煤体有限变形下煤与瓦斯突出的耦合失稳理论。

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Finaly, the instability time is calculated by the mechanics model and the prophase creeping velocity.

最后基于流变模型并根据前期蠕滑速率推测出失稳时间。

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In some cases, eccentricity spilled over into mental instability: Paul Ehrenfest's desire to keep up with developments in quantum mechanics eventually drove him to suicide.

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