3D Modelling
slope stability

Post failure slope conditions

Revolutionising Open Cut Coal Mine Slope Stability Assessment with 3D Modelling.

In the dynamic world of mining, the assessment of slope stability plays a critical role in ensuring safe and efficient operations. At Encompass Mining, we have embraced the evolution of technology to elevate our expertise in this field. This white paper showcases our successful utilisation of 3D limit equilibrium modelling to assess open cut coal mine slope stability, marking a significant milestone in our commitment to innovation and excellence.

Over the past five years, the application of 3D modelling in slope stability assessments has witnessed a remarkable surge.

One of the key advantages of 3D modelling lies in its ability to account for the complex interactions between structural elements and the breakdown of rock bridges. This trend is fuelled by the increasing availability of user-friendly 3D modelling software that empowers us to deliver more accurate and comprehensive analyses. We believe in harnessing the full potential of this technology to provide our clients with unparalleled insights and solutions.

By embracing the anisotropic nature of the rock mass under investigation, we can accurately capture the failure mechanisms and provide a more realistic representation of slope behaviour. Furthermore, 3D modelling is indispensable when analysing slopes with varying or confining geometries that cannot be adequately captured in a traditional 2D model.

Predicted critical failure surface, FOS ~ 0.95

Perspective view showing predicted critical failure surface (red polygon) and actual failure dimensions (white polygons)

It is essential to note that generic material parameters derived from 2D cases should not be directly applied to 3D models. Our meticulous approach involves back analysing material strengths specific to each 3D model, ensuring that the calculated strengths align with the actual failure mechanisms observed in the pit. This critical distinction sets our methodology apart from oversimplified 2D modelling, resulting in more precise and reliable slope stability assessments.

Within this white paper, we present four compelling case studies that showcase the power of 3D limit equilibrium modelling in open pit coal mines with complex slope geometries. By comparing the back-analysed strengths obtained from 3D and 2D models, we illustrate the substantial differences in the range of strengths calculated using these distinct analysis methods.

Post failure slope conditions

Perspective view map showing predicted critical failure surface (red polygon, FOS ~ 0.95) and actual failure location (greyscale)

Encompass Mining's successful implementation of 3D limit equilibrium modelling reflects our unwavering commitment to providing cutting-edge solutions tailored to the unique challenges of the mining industry.

Through our expertise and the utilisation of advanced technology, we continue to revolutionise slope stability assessments, ensuring the safety and success of our clients' mining operations. To read the full paper visit the link below.