论文部分内容阅读
百周年纪念矿是1970年,即曼尼托巴省成立一百周年时发现而命名的。矿体较小,贮量约200万吨,走向长度变化在400～600英尺之间,厚度10～60英尺,倾角75°。由于矿石品位低和金属价格的影响,要求降低采矿成本。该矿是采用普通分段采矿法来布置采准工程的。由于整个矿体都埋藏在一个大湖的下面,因此必须防止岩层错动,必须对采场进行水砂充填。1973年底,萨德伯里市的国际镍有限公司,采用垂直漏斗后退式采矿法(VCR 法)回采已充填的矿房之间的矿柱。实践证明,这种采矿方法已取得令人满意的结果,使用结果将由提出此法的加拿大工业公司公开发表。该法似乎有某些优点,百周年纪念矿遂选定一个矿房,用 VCR 法进行开采,而全矿生产则仍继续使用中深孔崩矿法。该试验矿房作业安全,采准费用降低,凿岩时间减少,单位炸药消耗量不高,矿石破碎良好。现在 VCR 法已为哈德逊湾矿冶公司所采纳,其应用范围也正在扩大。
The centennial mine was discovered and named in 1970, the hundredth anniversary of the founding of Manitoba. The ore body is small, with a storage capacity of about 2 million tons, a change in strike length of 400 to 600 feet, a thickness of 10 to 60 feet and an inclination of 75 °. Due to the low grade of ore and the impact of metal prices, mining costs are demanded to be reduced. The mine is the use of ordinary sub-mining method to arrange the mining project. Since the entire ore body is buried under a large lake, it is necessary to prevent rock strata from moving and water sand filling must be carried out on the stope. At the end of 1973, Sudbury International Nickel Ltd. used a vertical funnel retraction mining (VCR) method to recover pillars between filled mines. Practice has proved that this mining method has been satisfactory results, the results will be published by the Canadian industrial company proposed this law. The law seems to have some advantages. The 100th Anniversary Mine has selected a mine house to be mined by the VCR method while the whole mine production continues to use the medium-deep-hole collapse method. The trial mining operation safety, mining costs reduced, drilling time to reduce the unit consumption of explosives is not high, broken ore well. Now that the VCR method has been adopted by Hudson Bay Mining and Metallurgical, its scope of application is also expanding.