Author:
Lv Junlin,Liu Zhen,Huang Junhong
Abstract
AbstractWith the increase of the scale of an underground cavern, more and more towering underground side walls are left behind by blasting operation, which leaves a huge hidden danger to the structure safety of an underground cavern. Taking the propagation mechanism and damage distribution characteristics of blasting vibration along the elevation direction as the research subject, the propagation mechanism of blasting vibration along the elevation direction of high side wall of a deep-buried underground cavern can be obtained by comprehensive application of theoretical analysis, dimensional analysis, formula derivation, numerical analysis, and other research methods. Through multiangle comparative analysis, the internal mechanism of blasting vibration under elevation effect in underground caverns is revealed, and combined with the relationship between surrounding rock damage and blasting vibration velocity, the distribution characteristics of blasting vibration and damage under the elevation effect are proposed. In addition, through the establishment of a mechanical model of the response of blasting vibration of underground high side walls, the prediction formula of particle vibration velocity along the elevation direction under blasting vibration condition is analyzed, and the formula is adjusted and modified, which can meet the developing requirements of surrounding rock damage control precision.
Funder
The Doctoral Scientific Research Foundation of Shandong Technology and Business University, China.
The Doctoral Scientific Research Foundation of Shandong Technology and Business University, China
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
Mechanical Engineering,Aerospace Engineering,General Materials Science,General Chemical Engineering
Reference33 articles.
1. Cai, M., Kaiser, P.K., Tasaka, Y., et al.: Generalized crack initiation and crack damage stress thresholds of brittle rock masses near underground excavations. Int. J. Rock Mech. Min. Sci. 41(5), 833–847 (2004)
2. Grady, D.E., Kipp, M.E.: Continuum modelling of explosive fracture in oil shale. Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 17(3), 147–157 (1980)
3. Huang, J., Li, X., Luo, Y., Liu, T., Dong, Q., Xu, K.: Numerical simulation of influence of filled joint on the crack formed by notch hole blast. Eur. J. Environ. Civ. Eng. 24(4), 423–439 (2020). https://doi.org/10.1080/19648189.2017.1392366
4. Kuszmaul, J.S.: A new constitutive model for fragmentation of rock under dynamic loading. Oil Shales and Tar Sands (1987)
5. Li, Y., Ma, S.: Explosion Mechanics. Science Press, Beijing (1992)