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百年矿体(Centennial Mihe)于1970年发现,因这年正值曼尼托巴的百年纪念,故取名为百年矿。该矿体相当小,矿石储量约200万吨。走向长度为130～200米,宽度为3—18米,倾斜75度。低的品位和便宜的金属价格要求低的采矿费用。矿山是按常规的分段回采法进行开拓的。由于整个矿体埋藏于一个大湖之下,所以必须避免影响地表,矿房用水力充填料充填。 1973年末,萨德伯里地区的茵科(Inco)公司为了回收已充填好的矿房之间的矿柱而采用了垂直深孔球形药包采矿法(以下简称VCR法),其效果令人满意。这种方法有某些优点,所以在百年矿选择了一个矿房采用垂直深孔球形药包采矿法开采,而生产由深孔开采矿房来维持。这个试验矿房是安全的,并且表明采准费用低,缩短了打眼时间,炸药系数有所改善,破碎粒度良好。垂直深孔球形药包采矿法现在在赫德森湾矿冶有限公司已得到采用,并且正在日益推广。
Centennial Mihe was discovered in 1970 and was named Centennial Mine because of the centennial celebration of Manitoba this year. The ore body is quite small with about 2 million tons of ore reserves. To the length of 130 ~ 200 meters, the width of 3-18 meters, inclined 75 degrees. Low grade and cheap metal prices require low mining costs. Mining is carried out according to the conventional sub-mining method. Due to the fact that the entire ore body is buried beneath a large lake, it is necessary to avoid affecting the earth's surface and to fill it with hydraulic filling material. In late 1973, the Indom Deepwater Vertical Injector (EPC) mining method (hereinafter referred to as VCR method) was used to recover pillars between the well-mined mines with the effect of satisfaction. There are certain advantages to this approach, so a mined mine at the Centennial Mine was mined using vertical deep-hole spherical kits mining and production was maintained by deep-hole mines. This experimental mine is safe and shows that the cost of acquisition is low, the drilling time is shortened, the explosive coefficient is improved, and the crushing size is good. The vertical deep-hole pellet mining method is now being adopted at Hudson Bay Mines and Smelting Ltd. and is being rolled out.