Abstract: in order to ascerain the depotion condition of the concentrated runof zone in the Canmbrian limestone underground water in No.2 Mine and Wzhai Mine of ingdingshan Ccafield based on the geogical aut development features of the proved mining area.the underground conmection test was applied to study the distribution and causes of the underground water concentrated runoffzone and the water control ole. The stidy resuts showed that the fiow velocity of Cambria limestone underground water in No.2 Mine and Wzhai Mine was3 320.05 n d,the permeailityco ficient of the aquifer was 36 911.11 mid and the ccurence of the underground waerconcentrated unof zone was proved.The occurences of the reverse fault and the broken crack zone in No.2 Mine would be the key factor affected to the space distibuion of the concentrated runof zone in the Cambrian limestone underground water.The concentrated runof zone geneall controlled the movement of theCambrian limestone underground water from the south-west to north-east and from a shallw to deep.The determination on the disribuionfeatues of the concentratedrunoffzone in Cambrian limestone underground water could set up the base to prevent and control the seam floor water disaster.