Surrounding Rock Mass Quality Evaluation of Huangdao Water Sealed Underground Oil Tank

Abstract:

Huangdao water sealed underground oil tank, which lies in Qingdao, Shandong province, is one of strategic reservoir of oil in China. Targeting at a real pragmatic problem that sometimes the rock mass integrity index is more than 1 and taking Huangdao water sealed underground oil tank as an example, the rock sample wave velocity-stress relation tests are carried out. Then unloading index is put forward and formula of raock integrity index is modified so as to improve rock quality classification method. In the end, the improved rock quality classification method is applied to Huangdao water sealed underground oil tank engineering. The result shows that the quality of most rock masses here is level I or II.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 1877-1881
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.1877
• Online since: May 2011
• Authors: Xiang Chen, Xiao Bo Qi, Zhao Yi Xu
• Keywords: Evaluation of Rock Mass Quality, Huangdao Water Sealed Underground Oil Tank, Unloading Index, Wave Velocity-Stress Relation

References

[1] Li Xiaozhao, An Yingjie, Yu Jin, et al. Acoustic responses to rock core unloading-disturbance and unloading-sensitive rock mass[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(12): 2086 ~ (2092)

[2] Bian Zhihua, Li Weishu. Research on engineering mechanics properties of rock foundation under second Changjiang bridge in Nanjing[J]. Journal of Yangtze River Scientific Research Institute, 1999, 16(4): 42~45

[3] Gao Longsheng, Ge Huanchen. A preliminary study of P- and S-wave velocities under high pressure of rock samples from the mainland of China[J]. Acta Geophysica Sinica, 1975, 18(1): 26~38

[4] Cai Zhongli, Liu ke, Wu Jinba, et al. The research on acoustic properties of granite under uni-axial compression condition[J]. Rock and Soil Mechanics, 1986, 7(2): 27~36

[5] Huang Chengxian, Song Dawei. Study on elastic wave velocity of rock under confining pressure [J]. Chinese Journal of Geotechnical Engineering, 1991, 13(2): 32~41

[6] Liu Weiguo, Shan Yuming, Xu Guosheng, et al. Relationship between S-wave velocities and macroracks in sandstone during the heating triaxial test[J]. Journal of Chengdu University of Technology, 1999, 26(4): 392~395

[7] Ding Wuxiu. A recent study on the relation between elastic wave velocity and stress of rock (Rockmass)[J]. Journal of Geological Hazards and Environment Preservation, 1997, 8(3): 43~47

[8] Wu Delun, Zhao Mingjie. An inverse study on micromechanical parameters of rock[J]. Chinese Journal of Rock Mechanics and Engineering, 1996, 15(Supp.): 433~439