(1. State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;2. Department of Civil Engineering,Luoyang Institute of Science and Technology, Luoyang,Henan 471003,China)
Abstract:The rock mass around blasting hole will be damaged when foundation pit is excavated by blasting. Therefore,it is very important to control safety of blasting excavation in order to ensure the bedrock quality. Based on bedrock blasting excavation in Ningde Nuclear Power Plant,the attenuation laws of site blasting vibration is obtained through in-situ test;and the relationship between damage depth caused by blasting and peak particle vibration(PPV) of rock mass 30 m away from the blasting center is established through the site monitoring and numerical simulation. Accordingly,velocity threshold is determined based on different allowable damage depths of foundation pit excavation by blasting. It is shown that controlling method and velocity thresholds effectively ensure safety of the bedrock under blasting excavation.
谢冰,李海波,刘亚群,夏祥,于崇. 宁德核电站核岛基坑爆破开挖安全控制研究[J]. 岩石力学与工程学报, 2009, 28(08): 1571-1578.
XIE Bing1,2,LI Haibo1,LIU Yaqun1,XIA Xiang1,YU Chong1. STUDY OF SAFETY CONTROL OF FOUNDATION PIT EXCAVATION BY BLASTING IN NINGDE NUCLEAR POWER PLANT. , 2009, 28(08): 1571-1578.