Diffusion in the Matrix of Granitic Rock. Field Test in the Stripa Mine

Summary

A migration experiment with the objective to investigate the existence of a connected pore system in undisturbed rock has been performed in the Stripa mine at the 360 m-level.

Since all three tracers (Cr-EDTA, I and Uranine) that were used in the experiment migrated at least 11 cm into the rock under a three month period, this experiment indicates the existence of a connected pore system in “undisturbed” rock.

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Abbreviations

c:

concentration in liquid mol/m3

co:

injection concentration mol/m3

DP:

diffusivity in water in pores m2/s

Kp:

hydraulic conductivity m/s

L:

length m

p:

pressure Pa

r:

radial distance m

t:

time s

tc:

contact time s

vr:

radial velocity m/s

εp:

porosity m3/m3

φ:

diameter m

References

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Correspondence to Lars Birgersson.

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Birgersson, L., Neretnieks, I. Diffusion in the Matrix of Granitic Rock. Field Test in the Stripa Mine. MRS Online Proceedings Library 11, 519 (1981). https://doi.org/10.1557/PROC-11-519

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