Hole sealing structure

The utility model discloses a hole sealing structure which comprises a gas collecting pipe and a grouting pipe, wherein the gas collecting pipe and the grouting pipe are arranged inside a drill hole, a front clogging head and a rear clogging head are respectively arranged on the periphery faces of two end portions of the gas collecting pipe and comprise soft fabrics and expanding cement, wherein the soft fabrics are arranged on the periphery faces of the two end portions of the gas collecting pipe in a twining mode, the expanding cement is coated on the soft fabrics when the expanding cement is wet and scattered, and the expanding cement is matched with the outer wall of the gas collecting pipe and the inner wall of the drill hole in a sealed mode after the expanding cement expands and is solidified. The grouting pipe is arranged on the front clogging head in a penetrating mode, and an outlet of the grouting pipe is located between the front clogging head and the rear clogging head. The front clogging head and the rear clogging head are formed after the expanding cement coated on the two ends of the gas collecting pipe expands, quite expanding seal is achieved mutually among the expanding cement and the hole wall of the drill hole and the gas collecting pipe after the expanding cement expands, grouting towards the drill hole from the grouting pipe is carried out, crevices on the periphery of the drill hole can be preferably sealed, maintenance of pressure-bearing condition inside the seal hole cavity is achieved, setting time of the expanding cement is fast, and cost of sealing the hole is low, and high-voltage equipment is not need purchasing separately.