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国内外竖井施工中,采用深孔爆破技术是提高竖井掘进速度的基本条件之一。深孔爆破的优越性在于:增加了每茬炮的进度,相对减少了每米井筒的辅助时间,更大程度地发挥了环形或伞形钻架、大抓岩机、大吊桶、大提升机等机械化设备的能力,从而缩短了建井工期,节约了工程成本,提高了工程的经济效益,因而愈益为建井现场所重视和应用。近若干年来,我国部分竖井施工中采用深孔爆破的情况见表1,
In the construction of shaft at home and abroad, the use of deep-hole blasting technology is one of the basic conditions to improve the speed of shaft excavation. The advantages of deep-hole blasting lie in: increasing the progress of each gun, relatively reducing the auxiliary time per well, and giving more play to the annular or umbrella-shaped drilling frame, big grasping rock machine, big bucket, large hoist Such as the ability of mechanized equipment, thereby shortening the construction period, saving the cost of the project and improve the economic benefits of the project, so more and more attention and application of well site. In recent years, the use of deep-hole blasting in some of the shaft construction in China is shown in Table 1,