TENTATIVE STUDY OF DEEP KARST TYPES AND THEIR DEVELOPING INTENSITY IN NORTH CHINA

The deep karst is the definition of those which developed 100 meters below the karst spring discharge base level of limestone（∈—O） or the regional stationary stage. The development of the deep karst is resulted from several factors, including lithology, structure, water kinetics and so on. In accordance with the origin, it is divided into four types, namely the deep circulation type of groundwater （with subtypes）, the type of igneous-carbonate rock contact zone, the burial type （with subtypes）, the mixed dissolution types. It is briefly analysed in the developing depth and the tend of mine water in rush in different ereas.