An extension of the stand‑up time in the Q‑system rock‑mass classification up to 200 years based on the limestone mines in The Netherlands.

Hack H.R.G.K. & Price D.G.

Original article published in: Proc. 6th Congress International Association for Engineering Geology and the Environment (IAEG), Amsterdam. Publ. Balkema, Rotterdam. pp. 3559-3561. (article & presentation)

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