「continuous mining」を含む例文一覧(1)

  • The method comprises a step of forming a continuous underground wall above the underground cavity formed by the past mining in which pillars are left as supports, and a step of strip-mining a region enclosed by the continuous underground wall, and quarrying stones existing at least in one of a ceiling portion, column portions, and a floor portion of the underground cavity.
    残柱式採掘方法により形成された石材の地下空洞の上方に連続地中壁を形成する工程と、連続地中壁に囲まれた領域を露天掘りして、地下空洞の天井部、柱部、床部の石材の少なくともいずれかを採石する工程と、からなる。 - 特許庁

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