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美国爱达荷大学矿冶工程系参与了幸运星期五矿的矿山设计研究工作。其目的是从矿山条件出发研究和使用下向分层充填壁式采矿法。此法包括用致密的尾砂胶结充填料充填采空区。充填体养护后,在其下面进行采矿。矿山岩体的水平应力很大,告爆是个普遍的问题。水平应力与垂直应力之比为2:1,在1295米水平最大水平应力达65兆帕。在这种应力条件下采用这种采矿方法,希望
Department of Mining and Metallurgy, University of Idaho, USA, participated in the mine design and research work of the Lucky Friday mine. Its purpose is to study and use down-fill layered wall mining methods starting from mine conditions. This method includes filling the gob with a dense tailings-cemented filling material. Following conservation of the filler body, mining is carried out below it. The level of stress of mine rock is very big, warning explosion is a common problem. The ratio of horizontal stress to vertical stress is 2: 1, and the maximum horizontal stress at 1295 meters reaches 65 MPa. In this stress conditions using this mining method, hope