Development of coal deposits under water bodies
Abstract
One of the most difficult tasks in mining is the development of deposits under water bodies and large aquifers. Mining operations under water bodies are insufficiently studied. As a result, in some cases a lot of coal is lost in safety and barrier pillars, and in other cases improper mining leads to water breakthroughs causing disruption of operations and accidents with people. For example, the U.S. Bureau of Mines cites seven cases of catastrophic flooding of mines in Pennsylvania, mostly as a result of improper mining of barrier pillars. At the same time, according to the data of this bureau, according to the data of this bureau, with the correct choice of the mining system, methods of pillar mining and roof management it was possible to recover up to 35% of the reserves lost in the barrier pillars, i.e. 250 mln. m of anthracite. It would allow to prolong the work of mines for 5 years.
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