Abstract
In case of unstable cone-shaped pitwalls and dumps, the overlying rock weight is of importance. Different weight of overlying rocks generates different vertical pressures per horizontal sections of pits and dumps. In case that the type of a failure surface is known for the present slop of pitwall or dump, it is possible to detect a critical section of the maximum pressure. The location of the critical section is governed by the height and the bottom radius of a pit or a dump. This study relates the destruction zone location with the height and bottom radius of open pits (dumps). The results of the theoretical and experimental studies are reported.
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