Because the safety requirements of underground roof support are very high, those skilled in the art continue to research and make new improvements on the support structure. The currently widely used U-shaped steel support makes it solve the deficiencies of the existing technology, thereby improving the safety of underground roof support.
The U-shaped steel support includes at least two integral brackets. The integral bracket has an arched top beam, one end of the arched top beam is inserted into one end of the first side support beam, and the other end of the arched top beam is inserted into one end of the second side support beam. Both side support beams are curved beam shapes. The other end of the first side support beam is connected to one end of the bottom beam, the other end of the bottom support beam is connected to one end of the second side support beam, and the middle of the bottom beam is a straight beam shape. The two ends of the bottom beam are respectively provided with upwardly bent warping beams. The cross-sectional shapes of the arched top beam, the first side support beam, the second side support beam and the bottom beam are U-shaped. The ends of each beam are Convex teeth or grooves are respectively provided on the head portion, and the convex teeth cooperate with the grooves to form a plug connection between the beams, and the ends of the arched top beam, the first side support beam, the second side support beam and the bottom beam The outer wall of the head is respectively provided with a connecting seat, and a through hole is provided in the connecting seat. Bolts are installed in the through hole. At least two anchor bases are arranged on the outer wall of the U-shaped bottom of the arched top beam, and each two integral brackets are installed between them. Anchor.
The U-shaped steel support meets the pressure requirements of the roof of the roadway, buffers the bearing capacity, and closes the roof, so that all indicators of the support are of high quality, and the safety of the underground support is better guaranteed.
