Abstract
The glaciological aspects related to application of ice to support the rock walls in underground mining operations, are shortly discussed. Simple models for the states of stress and deformation in an ice body sinking into a vertical shaft are developed. Even if possible ice melt along the rock walls is neglected, it is concluded that the ice body is in general unstable, because cross contraction of the ice body will gradually reduce the intrusion depth of the wall obstacles into the ice. In order to avoid fall, the ice body should at intervals be supported by the shaft bottom, so that the necessary contact with the rock walls can be re-established. Estimates of the sink rate of the ice body are given.
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