EFFECT OF SEISMIC LOAD ON THE STABILITY OF A DOLOMITE QUARRY IN HUNGARY

The rock slope stability in seismically active regions is a critical aspect for safe and sustainable quarrying. This study investigates the effect of seismic loading on the stability of a dolomite quarry, integrating traditional analytical methods with advanced two-dimensional finite element models. The site, located near a historically active earthquake zone, provides an ideal environment to explore slope stability under both static and dynamic conditions. Site measurements and rock mass data, supplemented by geological data from comparable formations, inform the development of a comprehensive geotechnical model. The methodology follows the slope design framework of Read and Stacey (2009), emphasizing kinematic analysis and failure mode evaluation, particularly relevant to the structural integrity of strong, jointed rock masses like dolomite. Regulations, including Eurocode 7 partial factors and criteria for safety and failure probability, frame the analytical approach. Slope stability is first assessed through empirical techniques, such as SMR and Q Slope, then through detailed analytical solutions using RocScience software. Through RocScience RS2 could examine the application of seismic load in finite element models and highlight potential failures under earthquake conditions. While optimization of mining slopes is outside the scope, this analysis emphasizes model sensitivity to seismic inputs, joint geometry, and mesh size, demonstrating critical conditions under dynamic loading. Limitations in data availability, particularly historical earthquake data, are addressed with approximate time-history data.