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In-situ stress characterization and applications (view source)
Revision as of 16:56, 29 April 2022
, 16:56, 29 April 2022→Horizontal Component
===Horizontal Component===
===Horizontal Component===
The horizontal stress due to the tectonic movements, can be estimated using the ratio of the average horizontal stress to the vertical stress, as shown below:
The horizontal stress due to the tectonic movements, can be estimated using the ratio of the average horizontal stress to the vertical stress, as shown below:
σ_h=kσ_v=kz
σ_h=kσ_v=kz
where is the unit weight of the overlaying rock [mN/ m3].
where is the unit weight of the overlaying rock [mN/ m3].
z is the depth to point below surface [m].
z is the depth to point below surface [m].
::k is the ratio of the average horizontal stress to the vertical stress.
The ratio (k) can be determined using the simplified equation provided by Sheorey (1994):
The ratio (k) can be determined using the simplified equation provided by Sheorey (1994):
k=0.25+7E_h (0.001+1/z)
::<math>k = 0.25 + 7E_h (0.001+\frac{1}{z})</math>
where Eh is the average deformation modulus measured in a horizontal direction.
where Eh is the average deformation modulus measured in a horizontal direction.
==Determination Methods of Stress==
==Determination Methods of Stress==