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译文介绍奥斯特劳——卡尔温矿区开采保安煤柱的实践和理论认识,确定开采主巷保安煤柱的规则及顶板下沉预报方法。
The article introduces the practice and theoretical understanding of the security pillars in Austereou - Calvin mining area, and the rules for the pillar of coal pillar in the main road and the forecast method of roof subsidence.