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The stability of underground works has always occupied an important place in engineering. Their stability depends on how the design and execution of the underground works are done. The instability of underground works, in most cases, also has consequences on the surface because it can affect land and constructions. In the case of salt?s operation with rooms and pillars, the stability of the underground space depends on how the rooms and pillars were dimensioned. But besides designing the geometry of the undergroun...

The paper talks about the development of the geodetic networks using measurements of direction from the fixed points (with their coordinates known) towards the variable points (determined points). It starts from a situation that is given seven geodetic points whose coordinates are known, and an unknown point must be framed in such a network. After observation directions are carried out in three of the seven known points must be determined the coordinates of the unknown point. In order to reduce the large number of...

The paper refers to the way in which some conflicts between the complainants and a mining operator were solved. The mining company had built a dump on a valley and after a short time, several houses and land were damaged. Although the possessions were at a considerable distance from the stockpile, the owners accused that the groundwater and soil water flow was changed after dump construction. The mining company was sued. The court requested an expertise to determine the true cause of degradation homes and verify t...