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公开(公告)号：US20160326873A1
公开(公告)日：2016-11-10
申请号：US15148329
申请日：2016-05-06
CPC分类号： E21D21/0053 , E21D20/02 , E21D21/008
摘要： A locally-anchored, self-drilling, deformable, hollow rock bolt has one or more intermediate local anchors each of which is flanked by two relatively elongateable shank segments. After grout is supplied through the hollow interior of the rock bolt while the rock bolt is in the drilled borehole, each anchor fixes the bolt to the rock mass, whereas the adjacent smooth shank segments can deform and even yield to accommodate rock fracture. The local anchors may be of relatively short extent when compared to the shank segments. One or more of the intermediate anchors could be formed by a coupler connecting adjacent bolt sections together and/or by shaping the bolt and/or by providing an external anchor. The innermost end of the rock bolt may be formed from or bear a drill bit. The drill bit can have dual functions of drilling the borehole and serving as the innermost anchor of the bolt.
摘要翻译： 局部锚定的自钻孔，可变形的中空岩石锚杆具有一个或多个中间局部锚固件，每个锚固件侧面是两个相对可伸长的杆段。 当岩石锚杆在钻孔中时，通过岩栓的中空内部提供水泥浆后，每个锚固件将螺栓固定在岩体上，而相邻的平滑杆段可以变形甚至屈服以适应岩石断裂。 当与锚杆段相比时，局部锚可以具有相对较小的程度。 一个或多个中间锚固件可以由将相邻螺栓部分连接在一起和/或通过成形螺栓和/或通过提供外部锚固件的联接器形成。 岩石螺栓的最内端可以由钻头形成或承载钻头。 该钻头可以具有钻孔的双重功能，并且用作螺栓的最内锚。
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公开(公告)号：US09845678B2
公开(公告)日：2017-12-19
申请号：US15148329
申请日：2016-05-06
CPC分类号： E21D21/0053 , E21D20/02 , E21D21/008
摘要： A locally-anchored, self-drilling, deformable, hollow rock bolt has one or more intermediate local anchors each of which is flanked by two relatively elongateable shank segments. After grout is supplied through the hollow interior of the rock bolt while the rock bolt is in the drilled borehole, each anchor fixes the bolt to the rock mass, whereas the adjacent smooth shank segments can deform and even yield to accommodate rock fracture. The local anchors may be of relatively short extent when compared to the shank segments. One or more of the intermediate anchors could be formed by a coupler connecting adjacent bolt sections together and/or by shaping the bolt and/or by providing an external anchor. The innermost end of the rock bolt may be formed from or bear a drill bit. The drill bit can have dual functions of drilling the borehole and serving as the innermost anchor of the bolt.
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