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Line 51:
Line 51: − v = z+Pa (measured in Mega Pascal) + − + Line 58:
Line 58: − v = aza+ bzb+czc...+
In-situ stress characterization and applications (view source)
Revision as of 16:20, 25 August 2022
, 16:20, 25 August 2022→Vertical Component
The vertical stress (σv) acting on a horizontal plain can be estimated using the weight of the overlaying layers, as shown below:
The vertical stress (σv) acting on a horizontal plain can be estimated using the weight of the overlaying layers, as shown below:
::<math>\sigma_v = \sigma_z + Pa</math> (measured in Mega Pascal)
:where is the unit weight of the overlaying rock [mN/ m<sup>3</sup>3].
:where σ is the unit weight of the overlaying rock [mN/ m<sup>3</sup>].
:z is the depth to point below surface [m].
:z is the depth to point below surface [m].
:Pa is the atmospheric pressure (usually neglected = 0).
:Pa is the atmospheric pressure (usually neglected = 0).
In case the vertical stress is caused by multiple layers of different rock types, it can be estimated using the following formula:
In case the vertical stress is caused by multiple layers of different rock types, it can be estimated using the following formula:
::<math>\sigma_v = \sigma_aza + \sigma_bzb + \sigma_czc ...</math>
:where a, b, and c represent different layers.
:where a, b, and c represent different layers.