ON ENERGY ANALYSIS OF ROCK FAILURE
ON ENERGY ANALYSIS OF ROCK FAILURE
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发表时间：
2005
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通讯作者：
Hong-wei Zhou
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作者：
Hong-wei Zhou
从能量的观点出发，研究了岩石的变形破坏过程。并对这一过程中的能量耗散和能量释放行为进行了讨论。理论和实验研究表明，能量在岩石变形破坏过程中起着重要作用。岩石的破坏是由能量的突然释放引起的，是在一定条件下能量耗散的突变。从力学的观点来看，岩石变形破坏过程是从局部耗散到局部破坏，最后到整体灾变的过程;从热力学的观点来看，这个过程是一个包含能量耗散和能量释放的不可逆过程。现有力学理论强调能量耗散和局部破坏，而岩石破坏的主要特征是能量释放。因此，有必要综合考虑消能和放能的作用。本文的实验研究也表明，岩石的破坏特征不能用应力或应变强度来描述。结果表明，即使应力-应变曲线基本一致，岩样的破坏形式也各不相同，但岩样的能量释放量却不同。因此，从能量的角度可以很好地描述岩石的变形和破裂过程。
On the viewpoint of energy,the deformation and failure process of rock are studied. The behavior of energy dissipation and energy release during this process is also discussed. Theoretical and laboratory experimental studies indicate that energy plays an important role during rock deformation and failure. Rock failure is caused by the abrupt energy release,which is the catastrophe of energy dissipation under a certain condition. From the viewpoint of mechanics,rock deformation and failure process are processes from local dissipation to part failure and eventually to whole catastrophe;in addition,from the viewpoint of thermodynamics,this process is an irreversible process which includes energy dissipation and energy release. Current mechanics theories emphasize the energy dissipation and part breakage,however,the main feature of rock failure is energy release. Therefore, it is necessary to consider synthetically the effect of energy dissipation and energy release. Laboratory studies in the paper also demonstrate that the rock failure feature can not be described by the stress or strain strength. It is observed that the failure types of rock samples are different from each other even if the stress-strain curves are almost uniform,but the amount of energy release of rock samples is distinct. Consequently,the rock deformation and fracture process can be well described from the viewpoint of energy.