Hydrogeology & engineering geology are scientific disciplines dealing with the interaction of groundwater as complex solutions, and rock as multi-phase systems, together with the phenomena occurring in rock strata as a result of various engineering activities. Implementation of the advances in hydrogeology and engineering geology reflected in this book makes possible the assessment of rock properties & planning of mining activities, together with the forecast of stratium behaviour upon construction & operation of mines, & the design of special technological measures aimed at providing safe & economic mining, combined with environmental protection.