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引言液压埋管时,挤压阻力和复杂的地质情况会严重损伤公称直径1400毫米的钢筋混凝土预制管,受损部分必须截去。但竖井不宽,不允许截总长3米的管子。切割竖埋的管子时,应考虑不能牵连切割点旁边的开采设备,以及相连的未受损伤的管道。因为怕危及四周,不能用重锤拆除管子;用金刚石锯子锯的成本高,又费时间。所以,要寻求一种合适的爆破方法。
Introduction When hydraulically buried pipes are used, extrusion resistance and complex geological conditions can severely damage reinforced concrete precast pipes with a nominal diameter of 1,400 mm, and the damaged parts must be truncated. However, the shaft is not wide. It is not allowed to cut a pipe with a total length of 3 meters. When cutting a buried pipe, consideration should be given not to the mining equipment next to the cutting point and to the connected undamaged pipes. Because of fear of jeopardizing the surroundings, it is impossible to dismantle the pipe with a heavy hammer; the use of a diamond saw is costly and time-consuming. Therefore, we must seek a suitable blasting method.