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1. 发明授权

US4411559A Mining system 失效
标题翻译：采矿系统
公开(公告)号：US4411559A
公开(公告)日：1983-10-25
申请号：US275019
申请日：1981-06-18
申请人： Aunald Jopling
发明人： Aunald Jopling
IPC分类号： E21D23/00
CPC分类号： E21D23/0052 , E21D23/0017
摘要： Coal in the roof of a seam being mined by the long wall method is recovered by supporting an elongated area of the seam roof using a plurality of cradle supports, the front cradles being moved forward stepwise parallel to the long wall to form a passage with cantilevered roof supporting arms of the rear cradles. When the rear cradle at one end of the passage is moved forward into engagement with the front cradles, the coal in the roof is left unsupported, is collapsed, and is removed via a conveyor and a loader in the passage.
摘要翻译：通过长壁方法开采的接缝的屋顶中的煤被回收，通过使用多个支架支撑来支撑接缝屋顶的细长区域，前托架平行于长壁逐步向前移动以形成具有悬臂的通道后支架的屋顶支撑臂。当通道一端的后支架向前移动与前托架接合时，屋顶中的煤不被支撑，被折叠，并且通过通道中的输送机和装载机移除。

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