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A high-speed digital camera had been followed to capture the failure means of the coal specimens. The research outcomes show that after the influence velocity is greater than 4.75 m/s, the powerful tensile strength of this straight bedding direction is greater than that of the synchronous bedding course associated with coal examples. Because of the rise in the effect velocity, the powerful stress and ultimate strain rate of two types of coal samples tend to be increased, and also the t
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