Abstract: Celebrates the coal mine mine pit water treatment take the gate gram to stand as the backing, conducts the research to the mine pit water technology and the operation unit.Sinks in advance through the increase adjustment the pond and bi the water, adjusted the water volume not to be balanced, reduces following processing the load; The design high density labyrinth sloping plate is clear, arranges the side counter current, the elimination main suspension and the emulsified oil; Using “the PLC workstation + on position machine supervisory system” the pattern, guarantees the equipment steady safe operation.And tries after the implementation to move, the craft operation was simple, is advantageous for the movement to maintain and to manage, has achieved the sewage regeneration use process water water quality standard anticipated target.

Key words: Coagulation precipitation, The adjustment sinks in advance, Labyrinth sloping plate, Processing, design and the optimization