杨玉银;陈长贵;黄浩;刘志辉;张永强;张健鹏;廖志华;
YANG Yu-yin;CHEN Chang-gui;HUANG Hao;LIU Zhi-hui;ZHANG Yong-qiang;ZHANG Jian-peng;LIAO Zhi-hua;Sinohydro Bureau 5 Co.,Ltd.;

• 1:中国水利水电第五工程局有限公司

摘要(Abstract)：

为了解决乌干达卡鲁玛尾水隧洞10#施工支洞钻孔利用率低、进度滞后、光爆效果差等问题,组织爆破工程技术人员深入施工现场,对现有爆破方案进行优化,提出了"分部楔形掏槽"的概念。并与水平V形掌子面相结合,成功的将硬岩开挖爆破钻孔利用率从79.4%提高到98.5%以上;将平均单循环进尺从2.62m提高到3.25m,有效加快了开挖进度、降低了炸药、雷管单耗;通过调整光爆参数、装药结构,将光面爆破半孔率提高到90%以上。
In order to solve the issues of low utilization of borehole,lagging progress and poor effected smooth blasting during the Adit-10 tunnel construction in Uganda Karuma HPP TRT Project and the engineers and technicians were organized to the site to optimize the existing blasting scheme.The concept of " Sectional Wedge Cutting" was finally proposed,which combined with horizontal V-shaped working face.Many improvements were achieved by the application of this new scheme,including that blasting and drilling utilization of hard rock excavation increased from 79.4%to 98.5%and the average single cycle footage increased from 2.62 mto 3.25 m.The progress of excavation was effectively speeded up,the consumption of explosive and detonator was reduced,and the half-borehole ratio of smooth blasting was increased to more than 90% by adjusting the smooth blasting parameters and charge structures.

关键词(KeyWords)： 硬质岩石;隧洞开挖;分部楔形掏槽;钻孔利用率;单循环进尺;炸药单耗;光面爆破
Hard rock;Tunnel excavation;Sectional wedge cutting;Drilling efficiency;Single cycle footage;Explosive consumption;Smooth blasting

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 杨玉银;陈长贵;黄浩;刘志辉;张永强;张健鹏;廖志华;
YANG Yu-yin;CHEN Chang-gui;HUANG Hao;LIU Zhi-hui;ZHANG Yong-qiang;ZHANG Jian-peng;LIAO Zhi-hua;Sinohydro Bureau 5 Co.,Ltd.;

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