摘要
水下钻孔爆破设计与施工合理的炸药单耗取值,不仅有利于提高爆破效果,还能节约成本带来良好的经济效益。结合三峡-葛洲坝两坝间莲沱河段航道炸礁整治工程,以瑞典设计方法式为基础,研究水深变化对2号岩石乳化炸药爆速的影响规律,推导出基于提高爆破效果的水下钻孔爆破炸药单耗修正公式,利用修正后的公式计算出该工程的合理单耗值为1.6 kg/m^3。为了进一步说明修正公式的正确有效性,运用ANSYS/LS-DYNA进行数值模拟计算分析,计算出莲沱河段航道炸礁爆破工程的单耗值控制在1.55~1.6 kg/m^3时能够达到较好的爆破效果。修正后的公式计算出的合理单耗值略大于模拟计算结果,且两种方式计算出的合理单耗取值误差约3.2%,误差较小,验证了水下钻孔爆破炸药单耗修正公式的合理性和可靠性。
In the design and conduction of underwater blasting,a reasonable unit consumption value of explosives can not only improve the blasting results,but also save costs of blasting and bring good economic benefits.The effect of water depth on detonation velocity of No.2 rock emulsion explosive was studied based on the channel reef blasting regulation project of Liantuo river between the Three Gorges Dam and Gezhouba Dam with Swedish design method.A modified formula of unit consumption of explosives for underwater blasting was finally obtained in order to improve explosive effects.And a reasonable unit consumption of explosives calculated from this modified formula is 1.6 kg/m^3.In order to prove the effectiveness and validity of the modified formula,ANSYS/LS-DYNA was used to simulate the blasting effect.Then the unit consumption of explosives between 1.55 kg/m^3 and 1.6 kg/m^3 can lead to good results in this project.The unit consumption of explosives derived from modified formula is slightly greater than the simulation result and the error is about 3.2%.The results have proved the rationality and reliability of the modified formula of unit consumption of explosives in underwater blasting.
作者
李国徽
曹棉
肖山
张汉斌
吴立
LI Guo-hui;CAO Mian;XIAO Shan;ZHANG Han-bin;WU Li(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;Changjiang Chongqing Waterway Engineering Bureua,Chongqing 400011,China)
出处
《爆破》
CSCD
北大核心
2019年第4期112-118,共7页
Blasting
基金
国家自然科学基金资助项目(41672260)
中国地质大学(武汉)教学实验室开放基金资助项目(SKJ2018086)
关键词
水下钻孔爆破
炸药单耗
爆速测试
修正公式
underwater drilling & blasting
explosive unit consumption
detonation velocity test
formula correction
