By C. A. Baar
Utilized Salt-Rock Mechanics 1
summary: utilized Salt-Rock Mechanics 1
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Additional info for Applied Salt-Rock Mechanics. The in-situ behavior of salt rocks
Learning how to mine salt deposits certainly is very costly if newscomers start out with laboratory concepts, disregarding facts which are of vital importance. 2 History of salt and potash mining Nobody knows for sure where and when underground salt mining started.
The subsequent wave-front-like growth of the saltstock families took place in a purely halokinetic way, that is, by the move ment of salt under the influence of gravity. 3 mm a year" (Sannemann, 1968, p. 261). 3 Diapirism Modern investigators appear in agreement regarding the need for a trigger ing mechanism to initiate salt diapirism. Tectonics movements, resulting in faulting of competent formations are usually invoked. It may be emphasized with Kupfer (1974) — see preceding sub-section — that expansion tectonics Fig.
Similar brecciation of carnallite and of other salt rocks has occurred more frequently in salt domes and similar structures, due to extensive tectonic deformations. 3 Salt crystallization in voids due to bed separation Another phenomenon related to the loss of volume by carnallite conver sion to sylvite also has remarkable analogies in mining: the separation of salt beds along planes of weakness provided by interbedded layers of clay, opened voids which may have been filled with secondary salts crystallizing from migrating solutions.
Applied Salt-Rock Mechanics. The in-situ behavior of salt rocks by C. A. Baar