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This paper discusses the causes of surface deformation as a consequence of mining activities. Surface deformation associated with underground coal mining, named subsidence, is a gradual settling of the earth?s surface. Subsidence effects can result from all mining methods, but especially coal mining. Some of the primary effects of surface subsidence include damages of infrastructure (buildings and roads). The most vulnerable areas for deformation are those where underground mine working are closed to the ground su...

Praid salt deposit is one of the largest in Europe: the salt body has an elliptic shape, with diameters of 1.2 km and 1.4 km, the depth being extended until 2,700 m. The mining methods employed in time are various: be ll-shaped rooms, trapezoidal rooms. Nowadays, the small rooms and square pillars is employed, the method being described in the paper. At 120 m depth, the cure and treatment facility is located. The underground atmosphere is highly ionized and very eff ective in treating respiratory diseases. The Pra...