Development of a geomechanical model based on suitable estimations of GSI and UCS in mining production slopes at the TilTil district, central Chile
Development of a geomechanical model based on suitable estimations of GSI and UCS in mining production slopes at the TilTil district, central Chile
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DOI：
10.1016/j.ijrmms.2023.105390
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发表时间：
2023-07
影响因子：
7.2
通讯作者：
Félix Del Pozo;E. Córdova;C. Marquardt;Rodolfo Cabezas G;P. Benson;N. Koor;John Browning;Rocío Rudloff
中科院分区：
文献类型：
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作者：
Félix Del Pozo;E. Córdova;C. Marquardt;Rodolfo Cabezas G;P. Benson;N. Koor;John Browning;Rocío Rudloff
由于有效地应用地质力学模型需要时间、费用和技术知识，大多数应用的地质力学模型不太适合用于小规模采矿作业。这意味着通常不可能准确地获得先进矿区岩石特性的充分说明，这可能导致与地质力学相关的问题，如落石和边坡破坏。在这里，我们提出了对现有方法的调整，该方法允许构建一个简单的地质力学模型，该模型可以根据采矿发展进行调整，并用于为小规模露天矿作业中的采矿生产斜坡的设计参数制定建议。调整后的模型考虑了在地区一级收集的岩石上使用岩石力学试验，以及UCS估计、GSI表征和FEM建模，其基础是对由1导出的参数的估计；即材料常数mi、mb、s和a。结果表明，当现场估算值和直接取样值均在一定范围内时，修正地质力学模型中同一区域岩石的单轴抗压强度（UCS）可以充分估计推进矿区的具体UCS。
The majority of applied geomechanical models are poorly suited for use in small-scale mining operations owing to the time, costs, and technical knowledge needed to usefully apply them. This means that it is often not possible to accurately obtain an adequate account of rock properties in advancing mining areas, which can lead to geomechanical related problems such as rockfalls and slope failures. Here we propose an adaptation to an existing methodology which allows the construction of a simple geomechanical model, that can be adjusted depending on mining developments, and used to develop recommendations for the design parameters of mining production slopes in small-scale open-pit operations. The adapted model, which considers the use of rock mechanics tests on rocks collected over a district level, along with UCS estimation, GSI characterization and FEM modelling, is based on an estimation of the parameters derived by1; namely material constants mi, mb, s, and a. Results show that the Uniaxial Compressive Strength (UCS), measured for rocks in the same district, serves as an adequate estimation of the specific UCS in the advancing mining area in the modified geomechanical model when both the field estimates and direct sampling are within a determined range.