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对泥岩、砂质泥岩2种软弱岩石利用分离式霍普金森实验系统进行冲击动载实验。通过实验研究及理论分析发现,深井软弱岩石在冲击动载下动态抗压强度、动态弹性模量、泊松比随随应变率的增大而增加;破碎尺寸随应变率的增大而减小。破坏模式为拉伸破坏和剪切破坏。
Two kinds of weak rocks, mudstone and sandy mudstone, were tested by using the separate Hopkinson test system. Through experimental study and theoretical analysis, it is found that the dynamic compressive strength, dynamic elastic modulus and Poisson’s ratio increase with the increase of strain rate in the weak rock under impact loading. The size of the crushing decreases with the increase of strain rate . Damage modes are tensile failure and shear failure.