近20年来,天井钻进法在原苏联已得到全面推广应用。仅在原苏联每年就要掘进和装备700多公里天井。实际上世界各国在不同硬度和稳固性的岩石中都在使用钻进法掘进天井。大直径井孔钻进法的广泛应用始于本世纪60年代,当时主要是用在稳固的硬岩中掘进天井,无需支护。现在,随着大直径 In the past 20 years, the Patio Drilling Method has been fully popularized and applied in the former Soviet Union. Only in the former Soviet Union each year more than 700 kilometers of tunnels have to be excavated and equipped. In fact, all countries in the world use drilling methods to excavate patios in rocks of different hardness and stability. The widespread use of large diameter borehole drilling methods began in the 1960s, when mainly used for tunneling in stable, hard rock without support. Now, with the big diameter