Study on Damage Characteristic of Underground Cavern Blasting Excavation Based on Dynamic Damage Constitutive Model

DOI

10.2991/aeece-15.2015.133How to use a DOI?

Keywords

Blasting damage model, Damage criteria, Smooth blasting, Blasting parameters

Abstract

The dynamic disturbance to the remaining surrounding rock mass of underground caverns produced by blasting excavation can not be ignored. Considering the rock mass damage induced by compression-shear stress in the zone near the blasthole, the KUS dynamic damage constitutive model was improved, and adding the defined damage discrimination value to the KUS model.Using the improved KUS damage model to conduct the numerical calculation of the Xiluodu hydropower station left-bank underground powerhouse, to study the recommended smooth blasting parameters of side wall protective layer rock mass of underground powerhouse. The results show that the damage depth of rock mass around the blasthole was influenced by the cartridge diameter of blasthole, the increasing of the hole spacing only changed the shape of the damage zone, and can not reduce the maximum damage depth.In engineering design, the cartridge diameter of blasthole and the hole spacing can not be enlarged optionally, must be strictly in accordance with the requirements of the blasting design.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qian Dong
AU  - Xinping Li
AU  - Hang Zhao
PY  - 2015/09
DA  - 2015/09
TI  - Study on Damage Characteristic of Underground Cavern Blasting Excavation Based on Dynamic Damage Constitutive Model
BT  - Proceedings of the International Conference on Advances in Energy, Environment and Chemical Engineering
PB  - Atlantis Press
SP  - 668
EP  - 672
SN  - 2352-5401
UR  - https://doi.org/10.2991/aeece-15.2015.133
DO  - 10.2991/aeece-15.2015.133
ID  - Dong2015/09
ER  -