Prologue
发表于 2025-3-28 15:17:32
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爱国者
发表于 2025-3-28 22:42:20
Leitfaden für Bausachverständige/ring blasting due to the absence of sufficient free face for the movement of the blasted rock mass. To address this issue, slot raises are excavated step-wise using drop raise method. However, the drop raise method is time intensive and hence not feasible in order to enhance the pace of production.