初始裂隙几何要素对岩石裂隙扩展演化的影响

Influence of initial crack geometrical properties on rock crack propagation

为了探求初始裂隙几何要素对岩石裂隙扩展演化的影响,采用岩石破裂过程RFPA数值分析系统,研究特定应力条件下裂隙长度、无偏置双裂隙的水平间距和竖直间距对裂隙演化的影响。通过大量的数值试验,再现裂隙的发展演化过程,获得了特定条件下裂隙发展演化的一般规律,并对岩块破坏形态进行了描述。所获得的理论成果,对于研究裂隙岩体在外界荷载作用下的裂隙扩展演化规律具有一定的参考价值。

In order to study the influence of initial crack geometrical properties on rock crack propagation,the influences of crack length and crack spacing without bias double crack on crack propagation under the specific stress states are investigated using numerical analysis of rock failure RFPA.Using this method,the phenomena of crack initiation and propagation are well reproduced.Crack propagation characteristics under the specific stress states are obtained based on a large number of numerical tests.Rock failure processes are also described.This work provides a useful theoretical reference for studying rock crack propagation characteristics.