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大直径深孔天井掘进法具有作业安全、成本低、效率高的突出优点,随着地下大直径潜孔钻机在西方各国的推广使用,此法将被列为先进的天井掘进方法之一,如果能更好地解决其炮孔偏斜问题则将扩大使用范围与天井钻进法为之媲美。大直径深孔天井掘进法可分为全高爆破掘进和分段装药爆破掘进两类;按其装药结构又可分为柱状药包爆破与球状药包爆破两种,本文将以后面两种方法为主简述于后。
Large-diameter deep-hole pavement excavation method has prominent advantages of safe operation, low cost and high efficiency. With the popularization and application of underground large-diameter down-hole drilling rig in various countries in the West, this method will be listed as one of the advanced ways of tunnel excavation. If A better solution to the problem of borehole deflection would be to expand the range of use comparable to that of a well-drilling method. Large-diameter deep-hole pavement excavation method can be divided into full-height blasting excavation and segmented charge blasting two categories; according to the charge structure can be divided into columnar packet blasting and spherical packet burst two, this article will be followed by two The main method outlined in the post.