Rock’s instability after mining activity [articol]

Abstract

The abandoned or insufficiently clean-upped mining activities give a high risk to disasters because: - After many years from the stopping of the mining activities, those areas are more difficult access and is very hard to identified; - The geography and the topography of the underground works can not be founded and the specialists leaved the affected working areas; - For the surface mining works were forgot the underground mining works; - The underground waters are uncontrolled, dissolve the ore and the natural pillars in the galleries, oxidizing the metals from the pillars supporting the galleries, and finally pollute many areas;