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悬臂式掘进机在数量不断增加的同时,为了能截割更硬的岩石和改善机器的可靠性,其尺寸和功率也在不断地加大。第一台多斯科掘进机截割头的功率为22千瓦或37千瓦,现在多斯科MK3型的截割头功率已达142千瓦,安德森RH1/4型为112千瓦;诺辛泰坦的是97/194千瓦;设计中的盎格鲁/索维埃特的是149千瓦;采矿研究所设计的隧道钻巷机(也是悬臂式掘进机型)为224千瓦。机器的重量最初为18～20吨,现在重型掘进机已达70～80吨,最近德国的波拉特型已超过了100吨。
As the number of cantilever roadheaders continues to increase, their size and power are constantly increasing in order to cut harder rocks and improve machine reliability. The first Dorsk boring machine cutting head power of 22 kilowatts or 37 kilowatts, and now the Dorset MK3 cutting head power has reached 142 kilowatts, Anderson RH1 / 4 type is 112 kilowatts; Nocinta Titan is 97/194 kilowatts; 149 Angstroms for the Anglo-Suvéritic design; and 224 kilowatts for tunnel boring (also a cantilever boring machine) designed by the Institute of Mining. The weight of the machine was originally 18 to 20 tons, and now heavy-duty roadheaders have reached 70 to 80 tons. The recent Borat-type in Germany has exceeded 100 tons.