bn:02112266n
Noun Concept
Categories: Underground mining
EN
underground mining  Underground soft-rock mining  Coal skimming  deep seam mining  Sink and float method
EN
Underground soft-rock mining is a group of underground mining techniques used to extract coal, oil shale, potash, and other minerals or geological materials from sedimentary rocks. Wikipedia
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EN
Underground soft-rock mining is a group of underground mining techniques used to extract coal, oil shale, potash, and other minerals or geological materials from sedimentary rocks. Wikipedia
A group of underground mining techniques used to extract minerals Wikipedia Disambiguation
Production of underground cavities in the mountains in a closed construction Wikidata
Mining techniques used to extract minerals/materials from sedimentary rock Wikidata