Recently, Shengli Energy has successfully established a three-dimensional geological model for potential landslide area identification and stabilization and control measure research in its open-pit mine, marking a transition of slope geological condition perception from rough approximation to detailed visual representation.
Based on the outcomes of geophysical exploration and engineering geological drilling research, potential landslide areas such as water-rich and fractured zones were identified at the southern and northern end slope of the mine through inversion inference. By systematically conducting rock microstructure analysis tests, physical and mechanical property tests according to the distribution of abnormal areas that has been deciphered, the physical and mechanical parameters of rock-soil body in different strata were obtained. In response to the strong disintegration characteristics of rocks when encountering water, the mine conducted innovative rock mechanical experiments under different moisture conditions through the remodeling experiment method to understand the uniaxial and triaxial compressive strengths and shear strength of remodeled samples under different moisture conditions. Through comparative analysis of mechanical characteristics, the strength relationship between intact sample and remolded sample was clarified to summarize the strength change regulation under different moisture conditions. Finally, combined with experimental results, a comprehensive modeling method integrating geological plane maps, borehole data, and profile maps was adopted to construct a three-dimensional geological model of the mining area.
The three-dimensional geological model provides the mine with concise and clear information on slope strata, enabling a visual picture of the three-dimensional spatial distribution and changes in geological structures. It can also generate two-dimensional picture such as structural maps and lithofacies distribution maps. Combined with annual and monthly mining plans, stabilization control measures are proposed to accurately guide open-pit mining, ensuring the stability of the mine slope to the greatest extent during the mining process.
