Wattle Dam Gold Mine has successfully mined a significant gold orebody in very weak rock, where some of the ore strength was less than 1 MPa. Almost 100% ore recovery was achieved despite the weak rock. Conventional rockbolts did not achieve high anchorage capacities in this material. As mining extended to depth, squeezing developed in the rock mass. The mine trialled several ground control options in response to developing hazards and implemented two of them successfully. The first was shotcrete ribs for long-term control. The ribs were installed after allowing some squeezing movement to occur. Novel methods were developed to easily fabricate mesh for the ribs. The second option was cemented rock fill (CRF)for backfill of stope panels in order to control convergence and overbreak. Novel crush firings were used to allow blasting of stopes without conventional rises being required.
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机译：Water Dam Gold Mine已成功开采了一个非常弱的岩石中的重要金矿体，其中一些矿石强度小于1 MPa。尽管岩石岩石，但仍然实现了几乎100％的矿石恢复。传统的岩波在该材料中没有达到高锚固能力。由于采矿延伸到深度，挤压在岩石质量中开发。该矿井以响应发展危害并成功实施了两种地面控制方案。第一个是用于长期控制的喷射肋。在允许发生一些挤压运动之后安装肋骨。开发了新的方法以容易地制造肋骨的啮合物。第二种选项是粘液岩石填充（CRF），用于控制堆叠面板，以控制收敛和悬浮。使用新型挤压烧制来允许在不需要常规上升的情况下爆破停止。
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