A STUDY ON COAL FIELD WATER CHARGING AQUIFERS AND AQUITERDS

By combining use of data attained during mining operation and field exploration,this paper discussed regionally the regularaties of deposition and water-abundance change of the main coal field charging aquifers in the North China——the mid-Ordovician limestone,Taiyuan group limestone and the Quaternary loose deposit. Studied into detail the Benxi group which acts as an reginal aquitard in the North China.