The state of knowledge of the issues of exploitation of mineral deposits in permafrost conditions
Authors:
Abstract
There are almost no comprehensive data on the operating conditions of mineral deposits in the permafrost zone. The available information usually provides a one-sided assessment of the operating conditions, so it is necessary to approach them critically. Most often, permafrost is considered a positive factor that facilitates the construction and maintenance of mine workings, drainage and reduces the risk of underground fires of endogenous origin, gas emission and dust formation. With a short service life of underground workings driven in the stable permafrost zone, their maintenance is indeed facilitated and the water inflow is reduced. Meanwhile, some theoretical premises and practical data force us to reconsider this position. With an unstable permafrost regime, which is explained by the heterogeneity of the geothermal regime of the region and the influence of construction, the construction and maintenance of mine workings of an especially long service life may be even more difficult and expensive than under normal conditions, and the influx of water can create a threat to the very existence of the mine. It is characteristic that even authors who consider permafrost to be a positive factor point out these difficulties.
Область исследования:
Mining
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