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In-situ stress characterization and applications (view source)
Revision as of 15:55, 29 April 2022
, 15:55, 29 April 2022→Vertical Component
===Vertical Component===
===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:
v = z+Pa (measured in Mega Pascal)
v = z+Pa (measured in Mega Pascal)
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].
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:
v = aza+ bzb+czc...
v = aza+ bzb+czc...
where a, b, and c represent different layers.
where a, b, and c represent different layers.