Abstract

The geomechanical conditions of underground gold ore mining in thin and steeply dipping ore body under open pit bottom are assessed using the dedicated 3D parameter-oriented model of mine design. The numerical model has produced the forecast stress pattern maps of ore and rock mass disturbed by mining operations. Stability justification is implemented for a sill pillar at a depth of 140 m in case of active stoping two levels above and below the pillar. Safe parameters and conditions are determined for the cut-and-dry fill mining operations.

中文翻译：

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自底向上挖坑充填法开采露天矿底底下的黄金储备的理由

摘要

使用专用的3D参数导向的矿山设计模型，评估了露天矿井底薄而陡峭的矿体中地下金矿开采的地质力学条件。数值模型已经生成了受采矿作业干扰的矿石和岩体的预测应力模式图。在主动停止支柱上方和下方两个高度的情况下，对140 m深度的门槛支柱实施稳定性论证。确定了干散矿开采作业的安全参数和条件。