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在采用竖井开拓的矿山中,竖井掘进通常占去矿山总建设时间的35～45％。据美国分析,要建设一个200(万吨/年)煤矿井,需要投资3000万元,用5～7年的时间,而生产寿命只有20～30年。费钱费时间的主要方面在竖井掘进和平巷工程上。因此,随着开采深度的不断增加(如苏联的竖井深度,在1940年时平均为240～250来,而1977年则平均900～970米),相应地要加速矿山建设速度,提高回采强度。许多国家都在不断革新竖井掘进技术,要求创造新的更有效的掘进方法。美国最近拟定了“煤矿快速建设计划”,要求缩短1/4的井筒施工时间,直接费用节省15％,苏联有色金属矿山要求用普通法掘进的竖井,在1975年～1985年间,月平均掘进速度由35～40米提高到70米,掘进工的
In the use of shaft to open up mines, shaft boring usually accounts for the total mine construction time 35 to 45%. According to the analysis of the United States, to build a 200 (million tons / year) coal mine requires investment of 30 million yuan for 5 to 7 years and a production life of only 20 to 30 years. The main aspects of the time and money spent on shaft excavation and roadway engineering. Therefore, with the continuous increase of mining depth (for example, the shaft depth in the Soviet Union averaged 240-250 in 1940 and 900-970 in 1977), correspondingly, the construction speed of mines should be speeded up and the recovery strength should be raised. Many countries are constantly innovating shaft-boring techniques and are demanding the creation of new and more efficient driving methods. The United States recently formulated the “Quick Plan for Coal Mine Construction”, requiring a shortening of one-fourth of the wellbore construction time and a 15% reduction in direct costs. The Soviet Union non-ferrous metal mines require shafts drilled by common law between 1975 and 1985, From 35 to 40 meters to 70 meters, the digger’s