摘要
为保证保护层开采的爆破效果,提高施工效率并降低爆破成本,采用垂直炮孔底部填充波阻抗差异较大的垫层材料的技术进行保护层开采爆破。在分析爆炸应力波的特点、作用范围、反射与透射原理后,选取泡沫混凝土加松砂作为复合垫层材料。使用LS-DYNA对不同保护层开采爆破高度和不同泡沫混凝土高度的保护层开采爆破进行模拟分析,探索保护层开采爆破的合理高度。分析认为,采用25 cm泡沫混凝土加10 cm松砂复合垫层时,保护层开采爆破高度宜为4 m。研究结果在广东太平岭核电站建设中得到运用,建基面岩体得到良好的保护。
In order to ensure the blasting effect of protective layer,improve the construction efficiency and reduce the blasting cost,the technology of filling cushion material with large difference in wave impedance at the bottom of vertical blast hole was used in protective layer excavation blasting.After analyzing the characteristics,scope of action,reflection and transmission principles of explosive stress wave,the foam concrete and loose sand were selected as composite cushion materials.LS-DYNA was used to simulate and analyze the excavation blasting of protective layer with different blasting height of protective layer and different blasting height of foam concrete,to explore the reasonable height of protective layer excavation blasting.Analysis shows that when the 25 cm foam concrete and 10 cm loose sand composite cushion are used,the blasting height of the protective layer excavation is 4 m.This technology has been applied in the construction of Guangdong Taipingling Nuclear Power Station,and the foundation surface rock mass has been well protected.
作者
张紫晗
胡光球
郑建礼
余晖
李庆松
张兆阳
汪啸林
ZHANG Zihan;HU Guangqiu;ZHENG Jianli;YU Hui;LI Qingsong;ZHANG Zhaoyang;WANG Xiaolin(Guangdong Xiyuan Blasting Technology Co.,Ltd,Guangdong Huizhou,516007)
出处
《爆破器材》
CAS
CSCD
北大核心
2022年第3期57-64,共8页
Explosive Materials
基金
广东省爆破工程技术研究中心建设项目(191119075799737)。
关键词
保护层爆破
开采爆破高度
数值模拟
复合垫层
protective layer blasting
excavation blasting height
numerical simulation
composite cushion
