Roof separation water control device for coal mine construction

The utility model discloses a roof separation water prevention and control device for coal mine construction, which relates to the technical field of mine water prevention and control and comprises a ground and a ground drainage drill hole formed in the ground, a first steel sleeve is mounted on the inner side of the ground drainage drill hole, a second steel sleeve is sleeved in the first steel sleeve, and the second steel sleeve is sleeved in the ground drainage drill hole. A bed separation water area is deformed in the ground and located below the second steel sleeve, at least two glass fiber reinforced plastic floral tubes are arranged at the lower end of the second steel sleeve, and a floral tube coupling is connected between the two glass fiber reinforced plastic floral tubes. In the using process, water can be blocked to a certain degree through the first steel casing pipe and the second steel casing pipe, formation of a separation water area is slowed down, meanwhile, water can be drained through a dr