摘要
在锦屏二级水电站地下厂房岩壁梁爆破开挖施工中,为了获得较好的岩台成型效果,进行了不同方案的爆破试验,并在试验时进行了爆破振动监测。试验结果表明:爆破孔孔距为30cm的爆破效果好于孔距为40cm的爆破效果;孔距为30cm的不耦合系数大于孔距为40cm的不耦合系数,故增加不耦合系数,可以有效提高岩面平整度,减少爆破振动对岩壁面的损伤。
For formation of a better quality rock bench in the blasting excavation of an underground workshop’s rock anchor crane beam for the Jingping Secondary Hydropower Station,optimization of drilling and blasting parameters as well as the charging constitution was carried out through extensive comparative tests with different schemes and blasting vibration monitoring.The results indicate that the blasting effect of 30 cm hole spacing is better than that of 40 cm hole spacing.Furthermore,the coupling coefficient of 30 cm hole spacing is also greater than that of 40 cm hole spacing.Therefore,an increased coupling coefficient could lead to a smoother rock surface and less damage induced by the blasting vibration.
出处
《水利水电科技进展》
CSCD
北大核心
2012年第3期56-58,94,共4页
Advances in Science and Technology of Water Resources
基金
武汉市科技局社会发展科技攻关计划(201160823268)
中国地质大学(武汉)教学实验室开放基金(SKJ2011125)
关键词
岩壁梁
岩台
爆破试验
爆破振动
地下厂房
锦屏二级水电站
rock anchor crane beam
rock bench
blasting test
blasting vibration
underground workshop
Jingping Secondary Hydropower Station
