1 shaft minefield belongs to an area with structurally medium complexity,while the direct mine water filling sources are atmospheric precipitation,surface water,coal measures sandstone fissure water,gob water,structure water(through faults and subsided columns),indirect source is Ordovician limestone karstic water.

Thoroughly analyzed Ordovician limestone karstic water water-bearing strata,recharging,runoff and discharging conditions,development and utilization status quo,and probed into vertical changing pattern of Ordovician limestone karstic water as well.

As constructing the tunnels with soluable calcareous rocks whose geological con-ditions are complex, the outflow,mud-flow and surface collapse are usually occurred,caus-ing the construction of tunnels and later thc maintenance in traffic extremely difficult andhardly to be brought under control.

In order to find out the limestone dissolved cavern buried in high way designing area, largeloop Transient Electromagnetic Method was used in the area of limestone.