The benches allow equipment and personnel access to the fresh ore (gray) exposed at the bottom of the excavation.
这些平台是使（采矿）设备和工人抵达矿坑底部，到新挖出来的矿石（灰色）面前的通道。
The isolation devices are essentially giant rubber-and-steel pads that are installed at the very bottom of the excavation for a building, which then simply sits on top of the pads.
隔离设备实际上就是安装在建筑物开挖时最底层的巨大的橡胶钢铁垫，建筑物就坐在这些垫子上面。
The slip surface is searched through moving the three geometric control points on the ground surface, the bottom of excavation and the surface at half of the height of the excavation, respectively.
通过分别移动基底、地表水平面和位于基坑高度一半处的水平面上的三个几何控制点，寻找到边坡最危险滑移面并计算出对应的稳定性安全系数。
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