In this paper the stress and deformation fields about a locked fault in depth have been imitated using 3-dimensional finite element method and their time-space variation features have been analysed. The authors consid...In this paper the stress and deformation fields about a locked fault in depth have been imitated using 3-dimensional finite element method and their time-space variation features have been analysed. The authors consider tentatively that the horizontal stresses about an active fault decrease slightly near the fault. The distributions of stress increasing and decreasing regions due to the locking of a fault are skew-symmetrical about the fault. The stresses about the locked region are increased in a larger range, where great elastic strain energy is accumulated and a stronger earthquake is more easily developed than at the ends of the fault. Reverse variations of crustal stress and deformation may be related to the different stages of the seismogeny of an earthquake focus.展开更多
The effect of seepage of underground fluid on stability of rock blocks is a very important problem and has been studied by D. T. Snow and many other researchers. This note deals with the problem by means of catastroph...The effect of seepage of underground fluid on stability of rock blocks is a very important problem and has been studied by D. T. Snow and many other researchers. This note deals with the problem by means of catastrophic theory to study the stability of rock system and the corresponding seismic process.展开更多
文摘In this paper the stress and deformation fields about a locked fault in depth have been imitated using 3-dimensional finite element method and their time-space variation features have been analysed. The authors consider tentatively that the horizontal stresses about an active fault decrease slightly near the fault. The distributions of stress increasing and decreasing regions due to the locking of a fault are skew-symmetrical about the fault. The stresses about the locked region are increased in a larger range, where great elastic strain energy is accumulated and a stronger earthquake is more easily developed than at the ends of the fault. Reverse variations of crustal stress and deformation may be related to the different stages of the seismogeny of an earthquake focus.
基金Project supported by the National Natural Science Foundation of China.
文摘The effect of seepage of underground fluid on stability of rock blocks is a very important problem and has been studied by D. T. Snow and many other researchers. This note deals with the problem by means of catastrophic theory to study the stability of rock system and the corresponding seismic process.
