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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Optimizing the life of ore passes in a deep-level gold mine
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Optimizing the life of ore passes in a deep-level gold mine

机译：优化深层金矿中矿石的使用寿命

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Moab Khotsong is planned to be among the deepest shafts in the world and is the deepest shaft in the Vaal River Basin, which is situated approximately 180 kilometres southwest of Johannesburg, South Africa. The mine is designed to exploit the Vaal Reef package, which is sited at 2 400 m to 3 200 m below surface, within the Moab Khotsong lease area. Several other mines in the vicinity are currently mining the Vaal Reef at depths of 1 300 m to 2 330 m below surface. Moab Khotsong is a single bratticed shaft, with a diameter of 10.75 m and a single drop from surface down to 3 132 m, making Moab Khotsong the longest single drop shaft in the world. The sinking of the shaft had its own set of unique problems, which have been dealt with in separate publications. The tunnels towards the ore reserves traverse several different rock types ranging from hangingwall quartzite with uniaxial compressive strength (UCS) values of 200 to 260 MPa, to footwall quartzite with an average UCS of 172 MPa. Tunnels have also been mined through various formations of shale with UCS varying from a high of 155 MPa down to 83 MPa. Virgin stress levels range from 71 MPa at 85 level, which is 2 604 m below surface, to 83 MPa on 101 level, which is 3 054 m below surface. A broad-base classification of a deep-level mine is one in which the virgin stress levels approach or exceed half of the UCS of the host rock; and quite clearly Moab Khotsong can be classified as a deep-level gold mine.
机译：Moab Khotsong计划成为世界上最深的竖井之一，并且是Vaal流域中最深的竖井，该河流域位于南非约翰内斯堡西南约180公里处。该矿的目的是开采莫阿布·霍特松（Moab Khotsong）租赁区内地下2400 m至3200 m的Vaal Reef矿藏。附近的其他几处矿山目前正在开采地表以下1 300 m至2 330 m的Vaal Reef。 Moab Khotsong是单根硬质合金竖井，直径为10.75 m，并且从地面到3 132 m处都有一滴下落，这使Moab Khotsong成为世界上最长的单下落竖井。轴的下沉有其自身的一系列独特问题，这些问题已在单独的出版物中进行了处理。通往矿石储层的隧道横穿了几种不同的岩石类型，从具有200至260 MPa单轴抗压强度（UCS）值的上盘石英岩，到平均UCS为172 MPa的下盘石英岩。隧道还通过UCS从155 MPa降低到83 MPa的各种页岩开采。原始应力水平范围从85英尺下71 MPa（低于地面2 604 m）到101 MPa处83 MPa（低于地面3 054 m）。对深层矿山的广泛分类是指原始应力水平接近或超过母岩UCS的一半。显然，莫阿布·霍松（Moab Khotsong）可以归类为深层金矿。

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