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奥钢联美国公司研制了一种既可用于隧道掘进又可用于井筒开凿的SCM系列两用掘进机。该机按切割刀具与井筒或工作面的接触方式不同而分为全断面和部分断面掘进机。有关这种掘进机在北美进行岩土开掘作业的成本及其性能数据为: (1)刀具消耗与岩石的单轴抗压强度、抗拉强度、研磨等性质有关。刀具的消耗费用对软岩和非研磨性岩层为5美分/m~3,对硬岩和研磨性岩层为4美
VAI America has developed a SCM series dual-head boring machine that can be used for both tunneling and wellbore excavation. The machine according to the cutting tool and the wellbore or face contact with different ways and is divided into full-faceted and some section boring machine. The cost and performance data of this roadheader in North American geotechnical excavation are: (1) Tool consumption is related to the uniaxial compressive strength, tensile strength and grinding properties of the rock. Tool costs are 5 cents / m 3 for soft and non-abrasive formations, 4 for hard and abrasive formations