一、目前国内外掘进钻车钻臂发展概况在七十年代,世界各国已经普遍地在平巷掘进中用钻车代替气腿式凿岩机凿岩,钻车的品种已基本上能满足各种作业条件的需要。就以钻臂来说,现在已由六十年代的以极坐标和直角坐标式钻臂为代表的较为简单的钻臂发展到能适应多种作业条件的较为复 First, the current domestic and international development of drilling rig drilling arm profile In the seventies, the world has been widely used in the drifting tunnel instead of air leg rock drill drilling, drill the varieties have been basically able to meet a variety of operations Conditions need. As far as the boom is concerned, it has now been developed from a simpler boom represented by polar coordinates and a right-angle boom in the 1960s to a more complex