摘要
针对当前硬岩中爆破扩壶效率低、成腔小等难题,提出了组合孔微差爆破扩孔成腔技术方案。通过钻取中心主孔、周边孔和合理设计装药及起爆顺序,仅一次爆破可在硬岩中形成立方米级的空腔。数值模拟分析了4个和6个周边孔方案的爆破损伤演化过程和扩腔效果,并通过实爆验证了技术方案的可行性。实爆试验结果表明,4个和6个周边孔方案实际爆破扩腔后腔体体积分别为0.722 m^(3)和1.010 m^(3),比数值模拟结果略小,可通过组合孔微差爆破扩腔技术在硬岩中高效形成立方米级的大体积空腔。所提技术可为硬岩中快速开辟立方米级的空腔提供技术支撑。
To address the current challenges of low efficiency in blasting crater expansion and small cavity formation in hard rock,a combined-hole millisecond delay blasting method for cavity formation by hole enlargement is proposed.By drilling a central main hole and surrounding holes,and by rationally designing the charge and initiation sequence,a cubic-meter-level cavity can be formed in hard rock with a single blast.The numerical simulations were used to analyze the blasting damage evolution process and cavity expansion effects for the schemes with 4 and 6 surrounding holes.The feasibility of the technical solution was then verified through field blasting tests.The results of the field tests show that the actual cavity volumes after blasting for the 4-hole and 6-hole schemes were 0.722 m^(3) and 1.010 m^(3),respectively,which are slightly smaller than the numerical simulation results.Nevertheless,it is demonstrated that large-volume,cubic-meter-level cavities can be efficiently formed in hard rock using this combined-hole millisecond delay blasting technology.The proposed technology can provide technical support for the rapid creation of cubic-meter-level cavities in hard rock.
作者
王灿林
王俊辉
李超
张柏林
张润旭
邢灏喆
WANG Canlin;WANG Junhui;LI Chao;ZHANG Bailin;ZHANG Runxu;XING Haozhe(College of National Defense Engineering,Army Engineering University of PLA,Nanjing 210007,China;College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《陆军工程大学学报》
2025年第4期30-35,共6页
Journal of Army Engineering University of PLA
基金
国家重点研发计划(2024YFF0508204)
国家自然科学基金面上项目(12372378)
江苏省自然科学基金优秀青年基金(BK20240201)。
关键词
硬岩
扩孔成腔
组合孔微差爆破
数值模拟
hard rock
cavity formation by hole enlargement
combined-hole millisecond delay blasting
numerical simulation
