Effects of shear heating and dilatancy on slip instability of a fluid-infiltrated fault with rate/state depen- dent friction
نویسندگان
چکیده
where the expression following the first equality is the force in the spring and that following the second is the frictional resistance to sliding of the block (both expressed for a block of unit area). The load point velocity vo is the product of the imposed rate of tectonic strain rate γ̇ in the crustal block and the characteristic length of the block. The effective spring stiffness k is the shear modulus G of the material surrounding the fault divided by . The frictional resistance is the product of the effective compressive stress (σ − p) (the difference between the total constant compressive stress and the pore pressure) and a friction coefficient μ, which in general may depend on the amount of slip, slip velocity, and the state of the frictional contact. We utilize the well-known model of fault friction which depends on the instantaneous sliding velocity v = δ̇ and a state variable θ with the meaning of the average asperity contact time, (Dieterich 1979)
منابع مشابه
Induced Seismicity
s and Conference Proceedings Segall, P. and J.R. Rice, Dilatancy, compaction, and slip instability of a fluid-infiltrated fault, EOS. Transactions, American Geophysical Union, Vol. 75, No. 44, p. 425,1994. MOSSOP, Antony, and P. Segall. Induced seismicity at The Geysers, Northern California (EOS, TRANSACTIONS, AMERICAN GEOPHYSICAL UNION ; Vol. 75, No. 44, Suppl., p. 444, 1994). MOSSOP, Antony. ...
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