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六十年代至七十年代以来，采掘技术的发展进入了一个新阶段，以柴油机为动力的无轨设备在国外矿山如雨后春笋，迅速发展起来，如瑞典、美国、加拿大等国家井下使用的无轨设备已达到60—80％，而且日益增加。无轨采矿较有轨采矿效率提高1—5倍，每吨矿石成本降低25.7％，劳动力节约83—88％，设备减少一半，投资减少42％，建矿周期缩短一半。无轨设备的优点归纳起来有如下几点：
From the 1960s to the 1970s, the development of mining technology has entered a new stage. Diesel-powered trackless equipment has mushroomed in foreign mines and developed rapidly. The trackless equipment used in countries such as Sweden, the United States, and Canada has been used underground. Achieve 60-80%, and increasing. The efficiency of trackless mining is 1-5 times higher than that of on-orbit mining, the cost per ton of ore is reduced by 25.7%, the labor saving is 83-88%, the equipment is cut in half, the investment is reduced by 42%, and the construction period is cut in half. The advantages of trackless devices summed up in the following points: