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| SUPPORTING ANALYSIS OF JOINTED ROCK BASED ON DISCRETE ELEMENT METHOD |
| YU Chong1，LI Guowen2，XIA Xiang1，ZHOU Qingchun1 |
| (1. State Key laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. Daqing Oilfield Engineering Co.，Ltd.，Daqing，Heilongjiang 163712，China) |
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Abstract 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.
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Received: 18 July 2012
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2013, Vol. 32 
