Abstract
The paper reports on a series of conductivity experiments under straight flow conditions performed on an artificial granite fracture closed by various compression loads. Among the results reported is that with a constant load applied on the sample, the relationship between discharge and head gradient was linear only at low pressure gradients; a conductivity coefficient could be computed by linear regression. Regression analysis carried out on the calculated conductivity coefficients and the joint closure data shows that the parallel-plates cubic law is applicable to closed joints provided an initial aperture is introduced which is computed from the conductivity-closure data. The nonlinearity observed between the discharge and the head gradient was attributed to the deformation of the joint caused by a change of the effective stress across the fracture.
| Original language | English (US) |
|---|---|
| Pages | 168-173 |
| Number of pages | 6 |
| State | Published - Jan 1 1980 |
| Event | Can Rock Mech Symp Proc 13th, Underground Rock Eng, The H. R. Rice Mem Symp - Univ of Toronto, Ont Duration: May 28 1980 → May 29 1980 |
Other
| Other | Can Rock Mech Symp Proc 13th, Underground Rock Eng, The H. R. Rice Mem Symp |
|---|---|
| City | Univ of Toronto, Ont |
| Period | 5/28/80 → 5/29/80 |