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- Title
Response spectrum characteristics of roadway surrounding rock under blasting load.
- Authors
SONG Chunhui; LI Xianglong; FAN Tianlin; CHEN Hao; SONG Fei
- Abstract
In order to study the dynamic response law of roadway surrounding rock under downhole blasting dynamic load, the vibration test data were processed by MATLAB, and the derived vibration velocity, displacement, absolute acceleration response spectrum and absolute acceleration standard response spectrum were studied in depth. The research results indicated that; the peak number of velocity response spectra with a detonation distance of 185 m appeared in the period of 2 s, more than the peak number of velocity response spectra with a detonation distance of 86 m. The harmonic component below 10 Hz with a detonation distance of 185 m was higher than that with a detonation distance of 86 m. The blasting effect showed a greater impact on the damage of surrounding rocks at blast center distance of 185 m. When the blasting distance was 185 m and the damping ratio was 0.05, the amplification factor was 1, indicating it easy to cause damage to the surrounding rock. The research can provide guiding significance for the surrounding rock support.
- Publication
Nonferrous Metals (Mining Section), 2019, Vol 71, Issue 6, p13
- ISSN
1671-4172
- Publication type
Article
- DOI
10.3969/j.issn.1671-4172.2019.06.004