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3D modelling of groundwater flow in
fractured porous media— a coupled Hydro-
mechanical analysis
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Coupled hydro-mechanical numerical analysis
was carried out 3D to investigate the
effects of boundary conditions on
groundwater flow through a fractured porous
rock mass, toward a cavity. The findings of
this study show that the induced stress
field has a significant influence on
flow-deformation characteristics, depending
on the orientations and interconnectivity of
the joints. Beyond an insitu horizontal to
vertical stress ratio of 1.0, the change of
joint flow rate is marginal for the trialled
models. Moreover, the study suggests that
the most appropriate block size to be used
for flow calculation in a fractured rock
mass is 10-12 times the maximum dimension of
the excavation. This study was done on a
special request from a Faulty member from
Monash University, Australia. |
Fig a. Total flow rate toward the tunnel for
differing flow rates and boundary block
sizes |
Fig b Water ingress to the cavity with
normalized block size |
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