The Great Landslides in the East- Maritza Open-cast Mines (Bulgaria_- a Theoretical Paradox in the Engineering Geology
Abstract
The exploitation of the opencast mines in the East-Maritza coal basin was proceeded of detailed explorations and analysis of the engineering geological conditions. Nevertheless, one of the greatest landslides in the engineering geological pragtice occurred within the period of 1966 - 1968. The volume of the sliding masses reached 30 - 75 x 10 m3 • These landslides made questionable some of the classic formulations of the soil mechanics and engineering geodynamics, as for instance : - the possibilty of formation of sliding surfaces with inclination opposite to the direction of sliding; - the validity of the Coulomb-Navier's law in conditions of high confining pressure; - the existence of the so called "pore pressure" within the sliding zones during the deformation process. In the present paper, there could be found certain experimental data and interpretations on some of the above mentioned questions.
The Great Landslides in the East- Maritza Open-cast Mines (Bulgaria_- a Theoretical Paradox in the Engineering Geology
The exploitation of the opencast mines in the East-Maritza coal basin was proceeded of detailed explorations and analysis of the engineering geological conditions. Nevertheless, one of the greatest landslides in the engineering geological pragtice occurred within the period of 1966 - 1968. The volume of the sliding masses reached 30 - 75 x 10 m3 • These landslides made questionable some of the classic formulations of the soil mechanics and engineering geodynamics, as for instance : - the possibilty of formation of sliding surfaces with inclination opposite to the direction of sliding; - the validity of the Coulomb-Navier's law in conditions of high confining pressure; - the existence of the so called "pore pressure" within the sliding zones during the deformation process. In the present paper, there could be found certain experimental data and interpretations on some of the above mentioned questions.
