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近年来,在大规模水利建设和水土保持工程施工中,大搞土石方爆破已成为提高功效,节省劳力,加快施工速度的有效措施。但是,目前由于炸药缺乏,价格昂贵,而现行爆破方法的爆炸能量有效利用率低,抛掷爆破一般为3～7%,松动爆破为14～25%。因此,如何改进爆破方法,提高爆破能量的有效利用,是提高爆破效果,降低工程造价的重要途径。我站结合打坝治沟施工,采用空室装药爆破的方法,炸药消耗系数降低了25～30%,爆破效果提高30～50%,现将初步试验成果整理总结如下:
In recent years, in large-scale water conservancy construction and soil and water conservation project construction, large-scale earthwork blasting has become an effective measure to improve efficiency, save labor and speed up construction. However, due to the current lack of explosives, expensive, and the current blasting method, the effective utilization of explosive energy is low, throwing blasting is generally 3 ~ 7%, loose blasting of 14 ~ 25%. Therefore, how to improve the blasting method and improve the effective utilization of blasting energy is an important way to improve the blasting effect and reduce the construction cost. I stand combined with dam ditch construction, the use of empty chamber charge blasting method, the explosive consumption coefficient decreased by 25 to 30%, the blasting effect increased by 30 to 50%, the preliminary test results are summarized as follows: