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    • 1. 发明授权
    • Longwall mining apparatus
    • 长城采矿设备
    • US3640574A
    • 1972-02-08
    • US3640574D
    • 1969-10-02
    • HANS JOACHIM VON HIPPEL
    • HIPPEL HANS-JOACHIM VON
    • E21D17/02E21C35/14
    • E21D17/0206
    • An underground excavating apparatus having a conveyor for removing material from the face of an underground excavation. The conveyor removes the material in a predetermined direction. An elongated cap is movable into engagement with the roof of the excavation above the conveyor extending transversely to the face and the direction in which the conveyor removes the material. A set of props including first props extending upwardly above the conveyor from one side thereof and of the predetermined direction, and second props extending upwardly above the conveyor from the other side of the latter and of the predetermined direction. The props are thus mutually inclined, meeting above the conveyor and engaging and maintaining the cap means in position above the conveyor.
    • 一种地下挖掘装置,具有用于从地下挖掘的表面去除材料的输送机。 输送机沿预定方向去除材料。 细长的帽可移动地与传送器上方的挖掘顶部接合,该顶部横向于表面和输送器移除材料的方向。 一组道具,包括从其一侧和预定方向向上延伸到输送机上方的第一道具,以及从该输送机的另一侧向上延伸到该预定方向上方的第二道具。 因此道具相互倾斜,会聚在输送机上方,并将盖装置接合并保持在输送机上方的位置。