| 摘要 |
A solid filling material feeding pipe, comprising a three-layer structure feeding pipe (3) arranged in a feeding drill hole (2). Concrete (7) is poured between the three-layer structure feeding pipe (3) and the feeding drill hole (2). From the outside to the inside, the three-layer structure feeding pipe (3) is sequentially a protective layer (4), an intermediate layer (5) and an abrasion-resistant layer (6). The protective layer (4) and the intermediate layer (5) are both seamless steel pipes, an outer wall of the intermediate layer (5) is in close contact with an inner wall of the protective layer (4), the intermediate layer (5) and the protective layer (4) are connected via welding, and the abrasion-resistant layer (6) uses an abrasion-resistant material centrifugally cast on an inner wall of the intermediate layer (5). The feeding pipe implements continuous inputting and conveying of solid filling material from surface to underground, and a long service life and low usage costs are ensured. |
