RESEARCH ON THE STATIC AND DYNAMIC PROPERTIES OF THE GRANITE IN XINJIANG PROVINCE TIANHU AREA FOR THE GEOLOGICAL DISPOSAL OF HIGH LEVEL RADIOACTIVE WASTE
MAN Ke1,2，LIU Xiaoli3，GONG Fengqiang4，MA Hongsu1,2，CHEN Zhenming5，WANG Ju1,2
1. Division of Environment Engineering, Beijing Research Institute of Uranium Geology, Beijing 100029, China;
2. Key Laboratory of China National Nuclear Corporation on high level radioactive waste geological disposal, Beijing 100029, China;
3. State Key Laboratory of Hydroscience and Hydraulic Engineering, Tsinghua University, Beijing 100084, China;
4. School of Resources and Safety Engineering, Central South University, Hunan 410083, China;
5. Institute of Civil and Environment Engineering, University of Science and technology Beijing, Beijing 100083, China
Abstract：Based on the MTS815 Flex Test GT and SHPB (Split Hopkinson Pressure Bar), the static and dynamic properties of the granite in Xinjiang province Tianhu area have been studied deeply, which is a preselected area for the HLW (High Level radioactive Waste) geological disposal. For the granite in the borehole, the tension testing, uniaxial compression testing, dynamic tension testing, dynamic compression testing and the one dimensional coupled static and dynamic loading testing have been carried out separately. Specifically, all the rock tested is from the same borehole under one same depth, i.e. 360m, therefore, the testing results could be considered much more representative of the granite. The tension strength is about 11.75MPa, and the uniaxial compression strength is 175MPa or so, which is about 14 times than the tension strength. With the dynamic loading, the dynamic tension strength is about 25MPa~35MPa under the stress rate is 0.34×106MPa/s~0.51×106MPa/s. And the dynamic compression strength located in 138MPa~208MPa under the strain rate 80/s~160/s. With the loading rate increases, the strength is also increase, whatever the tension strength or the compression strength, which shows the loading rate effect of the rock. Furthermore, the one dimensional coupled static and dynamic tension loading testing has been carried out. It is found that with the precompression stress increases, the impact dynamic strength increases firstly, and then decreases stably. It could reach maximum when the precompression stress is about 50% of the static tension strength. Meanwhile, with the precompression stress increases, the coupled static and dynamic strength increases obviously, especially it could reach about three times compared with the static tension strength, and about one and half times of the dynamic tension strength. The testing results show that the failure model of the coupled static and dynamic loading is also tension failure, which is the same as the static tension and conventional dynamic loading test. Through a series of the testing above, rock in this area maybe considered stable and this area could be a selected area for the HLW geo-disposal. However, the testing result is inadequate, and the other testing, for example, the seepage testing, the in site stress testing and others should be moved forward, not only in one borehole, but also in different kinds of borehole in diverse depth. Then, rock in this area could be researched in detail, and the testing result and the theoretical knowledge could be applied to the blasting and excavation of the deep geo-engineering and the HLW geo-disposal.
满 轲1,2，刘晓丽3，宫凤强4，马洪素1,2，陈振鸣5，王 驹1,2. 高放废物地质处置新疆预选区天湖地段花岗岩的静态及动态力学特性研究[J]. 振动与冲击, 2017, 36(17): 146-156.
MAN Ke1,2，LIU Xiaoli3，GONG Fengqiang4，MA Hongsu1,2，CHEN Zhenming5，WANG Ju1,2. RESEARCH ON THE STATIC AND DYNAMIC PROPERTIES OF THE GRANITE IN XINJIANG PROVINCE TIANHU AREA FOR THE GEOLOGICAL DISPOSAL OF HIGH LEVEL RADIOACTIVE WASTE. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(17): 146-156.
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