ABSTRACT
The big-discharge coal regions are distributed widely over the Perrno-Carboniferous coalfields in North China and Late Permian coalfields in South China. Coal mines suffered from Karat water disaster in these regions.
Since the founding of P.R.China. a great deal of research work on protecting against mine water has been done under the leadership of the Ministry of Coal Industry. Successful results have been obtained in respects of studies on mine water inrush mechanism, dewatering and depression of aquifer, sealing water inrush spots by grouting and cutting-off water flow by cement curtains, protection against water at surface and underground as well as dewatering combined with water supply. Many problems in coal mining have been solved and theory and technology of mine water control with typical Chinese feature have been gradually formed.
