Study on the control effect of local basement replacement on the stability of dump

Area of Science:

• Geotechnical Engineering
• Slope Stability Analysis
• Waste Management

Background:

• Landslides in soft rock open-pit dumps pose significant risks to capacity and safety.
• Optimal utilization of external dump sites is crucial for mining operations.
• Existing methods may not adequately address stability issues in complex geological conditions.

Purpose of the Study:

• To propose and validate a local filling method for soft rock dump bases to control landslides.
• To determine the optimal basement replacement rate for enhanced slope stability.
• To assess the engineering applicability of the proposed method through numerical simulations.

Main Methods:

• Application of limit equilibrium theory and equivalent shear strength parameters.
• Derivation and improvement of the slope stability coefficient using the Morgenstern-Price method.
• Numerical simulations to analyze landslide mechanisms post-basement replacement.

Main Results:

• The local filling method is effective for slopes prone to landslides from cutting, bedding, and swelling layers.
• Increased local replacement rates progressively improve the slope stability coefficient.
• The K-Fs ratio plays a significant role in slope stabilization.

Conclusions:

• The local filling method offers a practical and effective solution for controlling landslides in soft base dump slopes.
• Choosing the lowest step for construction enhances practical implementation.
• The study provides strong evidence for the engineering applicability of the local basement replacement technique.