Research on the Damage Fracture of Rock Blasting Based on Velocity Response Spectrum
The damage caused by blasting vibration on rock mass is an extremely complex process, and has certain impact on the mechanical properties and bearing capacity of the rock, which will affect the overall stability and safe operation of the construction. Therefore, studying on the damage effect of blasting vibration is very necessary. Taking Laxiwa hydropower station project as a background, the paper computed relative velocity response spectrum using monitoring and measuring blasting velocity as an excitation, then analysis was carried out to study the relationship between the depth of rock blasting and the integral value of relative velocity response spectrum as well as the index of cooperation of the integral value and the blast vibrations duration time. The results show that using three-parameter (velocity, frequency, duration time) was clearly superior to two-parameter(velocity, frequency) on studying the damage fracture of rock blasting, and two-parameter was better than one-parameter(velocity) by analogy.
Rock damage Blasting vibration Excitation Relative velocity response spectrum
Xin Jian Sun Jian Sheng Sun
Tianjin University, Tianjin 300072, China Taiyuan University of Technology, Taiyuan 030024, China
国际会议
上海
英文
1521-1527
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）