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一、问题的提出 为了充分发挥TH286型(瑞典)四臂全液压钻孔台车的功能,我们采用5米深孔1～15段非电毫秒爆破一次成形的全断面开挖施工方法。在面积约100平方米的全断面上装药总量为550～1100公斤左右,在1000毫秒左右的瞬间完成5米全断面掘进。对此不少人抱怀疑态度,认为这样大药量、大断面的深孔预裂光面爆破,对围岩的破坏是难以估量的;对山体的
First, the issue raised In order to give full play to TH286 (Sweden) four-arm full hydraulic drilling trolley function, we use a 5-meter deep hole from 1 to 15 non-electric millisecond blasting a full-face excavation construction method. In a total area of about 100 square meters of the total charge of about 550 to 1100 kg, about 1,000 milliseconds to complete the 5 m full-face tunneling. In this regard, many people are skeptical that such a large amount of large-area deep-hole pre-split smooth blasting, the destruction of the surrounding rock is difficult to measure; the mountain