Experimental Study on the Correlation between Mechanical Parameters of Red Mudstone and Acoustic Velocity

TAN Xin; PU Yu; PENG Wei

doi:10.3969/j.issn.1001-5485.2014.11.0112014,31(11):51-55

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Journal of Changjiang River Scientific Research Institute ›› 2014, Vol. 31 ›› Issue (11) : 51-55. DOI: 10.3969/j.issn.1001-5485.2014.11.0112014,31(11):51-55

CHARACTERISTICS AND TESTS OF ROCK MECHANICS

Experimental Study on the Correlation between Mechanical Parameters of Red Mudstone and Acoustic Velocity

TAN Xin¹,PU Yu²,PENG Wei³

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Abstract

The velocity of acoustic wave propagation is closely related with rock mass strength and deformation characteristics. Uniaxial compressive strength tests, uniaxial compression tests and sound velocity test were conducted on 169 red mudstone samples from the red-layer region in Chongqing. Relationships between uniaxial compressive strength R, elastic modulus E_e and wave velocity V_P are established by different functional relationships. Comparative analysis results show that their relationship expressed using second-order polynomial is the best. The empirical relationship between R and V_p could be expressed by R=4.7×10^-6×V²_P-0.023 4V_P+33.771, and the relationship between E_e and V_p is E_e=0.003 7×V²_P-19.312V²_P+27 333. The rock mechanics parameters of an engineering example were calculated and analyzed by using the established relationships. It was found that the recommended value of uniaxial compressive strength of the example is 5-6 MPa, and the elastic modulus is 2 000-3 000 MPa.

Key words

red mudstone / acoustic velocity / uniaxial compression strength / elastic modulus / second-order polynomial

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TAN Xin,PU Yu,PENG Wei. Experimental Study on the Correlation between Mechanical Parameters of Red Mudstone and Acoustic Velocity[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 51-55 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0112014,31(11):51-55

References

[1] 李维树.三峡工程坝区岩体变形特性的动静对比分析. 长江科学院院报,1995,12(4):44-50.(LI Wei-shu. A Comparative Analysis between Dynamic and Static Experiments of Rock Deformation Characteristics in Dam Area of Three Gorges Project. Journal of Yangtze River Scientific Research Institute,1995,12(4):44-50.(in Chinese))
[2] 李岩,胡景松,尤春峰.岩块抗拉强度与声波速度关系初探. 黑龙江水利科技,2003,(3):12-14. (LI Yan, HU Jing-song, YOU Chun-feng. A Preliminary Study on the Relationship between Tensile Strength and Acoustic Velocity of Rock. Heilongjiang Science and Technology of Water Conservancy,2003,(3):12-14.(in Chinese))
[3] 兰光裕.板岩的力学特征及其与超声波速的相关性分析. 人民珠江,1997,(4):16-19. (LAN Guang-yu. Analysis of Mechanical Characteristics of Slate and Its Relationship with the Ultrasonic Velocity. Pearl River, 1997,(4):16-19. (in Chinese))
[4] 赵明阶,徐蓉.岩石损伤特性与强度的超声波速研究. 岩土工程学报,2000,22(6):720-722. (ZHAO Ming-jie, XU Rong. The Rock Damage and Strength Study Based on Ultrasonic Velocity. Chinese Journal of Geotechnical Engineering,2000,22(6):720-722.(in Chinese))
[5] 燕静,李祖奎,李春城,等.用声波速度预测岩石单轴抗压强度的试验研究. 西南石油学院学报,1999,21(2):13-15. (YAN Jing, LI Zu-kui, LI Chun-cheng, et al. Experimental Study on Rock Uniaxial Compression Strength Prediction by Using Acoustic Velocity. Journal of Southwest Petroleum Institute,1999,21(2):13-15.(in Chinese))
[6] 刘洋,赵明阶.岩石声学参数与应力相关性研究综述. 重庆交通学院学报,2006,25(3):54-58. (LIU Yang, ZHAO Ming-jie. Research Overview of the Relation between Ultrasonic Parameters and Stress on Rock. Journal of Chongqing Jiaotong University,2006,25(3):54-58.(in Chinese))
[7] 李维树,黄志鹏,谭新.水电工程岩体变形模量与波速相关性研究及应用.岩石力学与工程学报,2010,29(增1):2728-2733. (LI Wei-shu, HUANG Zhi-peng, TAN Xin. Research and Application of Correlation between Deformation Modulus and Wave Velocity of Rock Mass in Hydroelectric Project. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(Sup.1): 2728-2733.(in Chinese))