摘要
为了研究开挖卸载及临近区域的爆破施工对节理岩体和现有支护结构造成的不利影响,结合大连地下石油储备库洞室群局部不良地质的支护设计,针对节理岩体特点,基于离散单元法开展围岩静力、动力支护效果分析。首先,根据备选支护方案,分析开挖卸载的静力支护效果,获得应力场、位移场结果,研究备选支护方案的可行性及改进之处。然后,依据现场实测结果施加等效爆破荷载,分析临近区域爆破振动的动力支护效果,获得分析点的时程曲线及速度、应力、位移的变化规律。采用的计算方法为实际工程的静力、动力支护分析以及确定爆破振动安全允许标准提供一定的参考价值。
In order to study the effects of rock excavation unloading and adjacent blasting on jointed rock and support structure,based on discrete element method,static and dynamic supporting analyses are carried out for Dalian underground oil storage cavern local jointed rock masses. Firstly,according to alternative support schemes, static supporting analysis of rock excavation is carried out,and the surrounding rock stress field and displacement field are obtained. Simultaneity,feasibility and improvements of alternative support schemes are studied. Then, considering adjacent region blast vibration,the equivalent blasting load derived from field test results is applied. The dynamic supporting effect of adjacent blasting vibration is analyzed. The time curve of monitoring points and the variations of velocity,stress and displacement are got. The numerical calculation method has certain reference value for static,dynamic analysis and determining safety blasting vibration standards.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2013年第S2期3245-3257,共13页
Chinese Journal of Rock Mechanics and Engineering
基金
国家杰出青年基金项目(51025935)
国家重点基础研究发展计划(973)项目(2010CB732001)
关键词
岩石力学
支护分析
数值计算
石油储备
UDEC
爆破振动
rock mechanics
supporting analysis
numerical calculation
oil storage
universal distinct element code(UDEC)
blasting vibration
