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金伯利岩管状金刚石矿体的平面形状近似椭圆形,平面尺寸为900×450米,管状矿体在深370米处被一厚约75米几乎成水平的较幼年辉长岩脉所横切。在管状矿体的东南部首先用三个大采场回采辉长岩脉下部的矿体,采场的设计尺寸:宽80米,高65～80米,长125米。矿柱宽40米,高80米。矿体和围岩接触明显,矿体平均倾角85°。围岩
The planar shape of the kimberlite tubular diamond ore body is approximately elliptical with a planar dimension of 900 × 450 m. The tubular ore body is intersected by a nearly 75-m-thick, younger gabbro at a depth of 370 m. In the southeastern part of the tubular ore body, the ore bodies below the gabbro are recovered from three large stopes. The stope is designed to be 80 meters wide, 65 to 80 meters high and 125 meters long. Pillar width 40 meters, 80 meters high. The contact between the ore body and the surrounding rock is obvious, and the average inclination angle of the ore body is 85 °. Surrounding rock