Studies of stress distribution during undercutting were carried out using Boundary Element Method for Tongkuangyu Copper Mine.
文章根据铜矿峪铜矿开采条件，运用边界元法进行了矿块崩落法拉底过程中应力分布规律的研究。
New City has a long history, the Old Stone Age 28,000 years ago, the late "Tongkuangyu Zhi", in relation to live in this dwelling.
朔城区历史悠久，28000年前的旧石器时代晚期“峙峪人”就在此栖居生息。
Three types of copper ores have been recognized in this region, namely, the Henglingguan type, the Tongkuangyu type and the Bizigou type.
区内分布的铜矿类型主要有横岭关，铜矿峪、篦子沟三种类型。
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