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1. 发明授权

US4596496A Mine roof supporting truss system 失效
标题翻译：矿顶支撑桁架系统
公开(公告)号：US4596496A
公开(公告)日：1986-06-24
申请号：US643042
申请日：1984-08-22
申请人： Gary D. Tyrell , Robert W. Hill , Jerry Frease
发明人： Gary D. Tyrell , Robert W. Hill , Jerry Frease
IPC分类号： E21D11/00 , E21D21/00 , E21D20/00
CPC分类号： E21D11/006 , E21D21/0086
摘要： A truss system is disclosed for use in supporting the roof of a mine. The system comprises an assemblage of elements which permit more rapid and efficient installation than prior art truss systems which have generally been installed as a secondary operation, after the standard, required bolting pattern is in place. The present system, on the other hand, may be installed concurrently with and in fact may become part of, the standard bolting system. The system includes a pair of roof bolts installed in conventional fashion in drill holes extending at divergent angles into the mine roof on opposite sides of the mine opening. The bolts each extend through aligned openings in a bearing support plate and a separate angle block having a curved outer surface. The closed ends of a U-bolt, having a curvature corresponding to the surface of the angle block, extend around the two blocks with the open, threaded ends of the U-bolts facing one another. A pair of blocks having three parallel openings therethrough are placed on the two U-bolts, the open ends thereof extending through the outer openings, and secured with nuts. A rod threaded at both ends, or a plurality of such rods joined by a threaded coupler, extends through the center opening of the block, thereby joining the two U-bolts, and is secured by nuts on each end. The truss is tensioned to a desired degree by threaded advance of the nuts on the U-bolts and/or coupling rods. The angle blocks are disclosed in two embodiments, the first having a planar surface engaged by the bolt head or a flat washer, and the second having an inwardly curved cavity surrounding the opening through which the bolt passes and is engaged by a mating washer on the bolt head. The design of the second embodiment permits considerable variation in the relative angular orientations of the truss elements.
摘要翻译：公开了一种用于支撑矿山屋顶的桁架系统。该系统包括组件，其允许比现有技术的桁架系统更快速和有效的安装，这些桁架系统通常被安装为辅助操作，在标准的所需螺栓模式就位之后。另一方面，本系统可以与标准螺栓系统同时安装并且实际上可以成为标准螺栓系统的一部分。该系统包括以常规方式安装在钻孔中的一对屋顶螺栓，其以发散角延伸到矿井开口相对侧的矿顶。螺栓各自延伸穿过轴承支撑板中的对准开口和具有弯曲外表面的单独角度块。具有对应于角块的表面的曲率的U形螺栓的封闭端在两个块之间延伸，其中U形螺栓的敞开的螺纹端彼此面对。一对具有三个平行开口的块被放置在两个U形螺栓上，其开口端延伸穿过外部开口并用螺母固定。在两端螺纹连接的杆或通过螺纹联接器连接的多个这样的杆延伸穿过块的中心开口，从而接合两个U形螺栓，并且在每个端部上由螺母固定。通过将螺母螺纹推进U形螺栓和/或联接杆上来将桁架张紧到所需的程度。在两个实施例中公开了角块，第一具有由螺栓头或平垫圈接合的平面，并且第二具有围绕开口的向内弯曲的空腔，螺栓穿过该开口，并且通过其上的配合垫圈接合螺栓头。第二实施例的设计允许桁架元件的相对角度取向的相当大的变化。

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