裂隙岩石破裂机理研究
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摘要
应用伪张力法和断裂力学原理对在受压状态下裂隙岩石的破裂机理作了进一步的理论和实验研究。研究表明，裂隙岩石的宏观破裂与岩石的微裂隙分布及其相互作用密切相关，在一定载荷条件下，岩石内部微裂隙的扩展和聚集方式呈现一定的规律性，从而使得裂隙岩石宏观破裂的形成和扩展也具有一定的规律。文中引入了等效系数和有效剪应力，并通过实验观测，进一步证明了本文的理论分析与实验结果的一致性。最后，作为实例分析了雁形裂纹的形成和扩展机制。
A further investigation of mechanism of cracked rock failure under compression was made. The method of pseudo-tension and the fracture mechanics are applied in order to reveal features of the cracked rock . The paper analyzed theoretically and experimentally mechanism of macro-failure of brittle rock. The results showed that macro-failure of the cracked rock was closely related to distribution of micro-cracks and their interaction. Under given load condition, the interaction and coalescence of micro-cracks follow a certain rules. The development of macro-failure is also typical. The consistency between theoretical analysis and test results was verified. Finally, the formation and development mechanism of echelon cracks were described as an example.
A further investigation of mechanism of cracked rock failure under compression was made. The method of pseudo-tension and the fracture mechanics are applied in order to reveal features of the cracked rock . The paper analyzed theoretically and experimentally mechanism of macro-failure of brittle rock. The results showed that macro-failure of the cracked rock was closely related to distribution of micro-cracks and their interaction. Under given load condition, the interaction and coalescence of micro-cracks follow a certain rules. The development of macro-failure is also typical. The consistency between theoretical analysis and test results was verified. Finally, the formation and development mechanism of echelon cracks were described as an example.
引文
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