岩土力学2011，Vol.32Issue(10)：2951-2956,2964,7.
基于岩体爆破累积损伤效应的Hoek-Brown准则修正公式
Amended expressions of Hoek-Brown criterion based on blasting cumulative damage effects of rock mass
摘要
Abstract
The disturbance and damage induced by excavation and blasting, especial blasting cumulative damage effects resulted from frequent blasting, will play down the integrity of rock mass, weaken the mechanical parameters of rock.mass and threaten the stability of rock engineering surely. Considered the blasting cumulative damage effects of rock mass, the shortages of Hoek-Brown criterion and its modified expressions were pointed out. The methods of obtaining the value of mb and s which could reflect the blasting cumulative damage effects, blasting disturbed state and the lowering degree of its mechanical parameters, were found by introducing integrity coefficient Kv and damage factor D. The cumulative expanded models of rock mass blasting damage were found with the baseline of rock mass sound velocity reducing ratio η and the models were used in the amended expressions of Hoek-Brown criterion, based on the relationship between sound velocity variation and blasting cumulative damage effects. The analysis of the amended expressions was carried out based on the simulative blasting tests in-situ and the data of sonic measurement. The research results show that the amended expressions of Hoek-Brown criterion taken blasting cumulative damage effects of rock mass into account are reasonable.关键词
岩石力学/爆破累积损伤效应/岩体力学参数/Hoek-Brown准则/修正公式Key words
rock mechanics/ blasting cumulative damage effects/ mechanical parameters of rock mass/ Hoek-Brown criterion/ amended expressions分类
建筑与水利引用本文复制引用
闫长斌,李国权,陈东亮,刘振红,刘建磊..基于岩体爆破累积损伤效应的Hoek-Brown准则修正公式[J].岩土力学,2011,32(10):2951-2956,2964,7.基金项目
国家“十一五”科技支撑计划项目资助(No.2006BAB04A06) （No.2006BAB04A06）
黄河勘测规划设计有限公司自主研究开发项目资助(No.2009-ky01). （No.2009-ky01）
