In RWE Power AG's opencast mines, lignite is extracted using large-scale mining equipment. In addition to bucket-wheel excavators (BWE) and spreaders, this includes reclaimers in the coal bunkers. During operation, it must be possible to vary the boom height of the equipment as well as to accommodate the loads that occur. This is done with the aid of multiple reeved wire ropes that are guided over several rope pulleys, compensating pulleys and rope drums (Figure 1). The block and tackle principle is used to reduce both the rope force and the drive torque of the hoisting winches. However, a durable design of wire ropes is not possible due to the complex states of stress that occur within wire ropes as well as external environmental influences.
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机译：在RWE Power AG的露天矿中，褐煤是使用大型采矿设备提取的。除了斗轮挖掘机（BWE）和撒布机外，还包括煤仓中的取料机。在运行过程中，必须能够改变设备的吊臂高度，并适应发生的负载。这是借助多个钢丝绳完成的，这些钢丝绳被引导到多个钢丝轮、补偿滑轮和钢丝绳卷筒上（图 1）。滑车原理用于降低起重绞车的绳索力和驱动扭矩。然而，由于钢丝绳内部发生的复杂应力状态以及外部环境影响，钢丝绳的耐用设计是不可能的。
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