Research Article of Scientific Research and Reviews
Innovative testing technique of rock stress wave propagation
Qing-yu Song1*, Rui Zhang2
1School of Earth Science and Engineering, Hebei University of Engineering, Handan, Hebei 056038, China.
2School of Architectural and Surveying Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China.
Inadequacy of rock mechanics chamber test devices and test systems that cannot accurately simulate gradient static stresses on specimens, this paper presented an innovative testing technique, which relates to the stress wave propagation of rock subjected gradient static stress. The method involves modification of a split Hopkinson pressure bar, such that the test specimen is subjected to gradient static stress and axial impact loading. The device has the features of simple loading and multiple static stress gradients, which verifies the feasibility of stress wave propagation test of red sandstone specimens under linear gradient static stress and conducts stress wave propagation test of red sandstone specimens under linear gradient static stress. Tests on red sandstone specimens with different static stress gradients show that the stress wave propagation of the specimens under gradient static stress is different with their corresponding homogeneous static stress state. The attenuation coefficients of stress waves are different under different conditions, and loading gradient static stress can accelerate the attenuation process. The results of this study will be useful for the analysis of stress wave propagation in deep engineering blasting and the stability analysis of adjacent structures.
Keywords: Stress wave propagation; Rock; SHPB system; Gradient static stress
How to cite this article:
Qing-yu Song, Rui Zhang. Innovative testing technique of rock stress wave propagation. Scientific Research and Reviews, 2021; 14:123. DOI: 10.28933/srr-2021-03-1805
1. Chi L Y, Zhang ZX, Aalberg A, et al. Fracture processes in granite blocks under blast loading. Rock mechanics and rock engineering, 2019, 52(3): 853-868..
2. Hoek E, Diederichs MS. Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and Mining Sciences, 2006, 43(2):203-215.
3. Bonfils B. Quantifying of impact breakage of cylindrical rock particles on an impact load cell. International Journal of Mineral Processing, 2017, 161:1-6..
4. Raina AK. Influence of joint conditions and blast design on pre-split blasting using response surface analysis. Rock Mechanics and Rock Engineering, 2019, 52(10): 4057-4070.
5. Hopkinson B. X. A method of measuring the pressure produced in the detonation of high, explosives or by the impact of bullets. Philo-sophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character, 1914, 213 (497-508): 437-456..
6. Kolsky H. An investigation of the mechanical properties of materials at very high rates of loading. Proceedings of the physical society. Section B, 1949, 62(11): 676..
7. Davies RM. A Critical Study of the Hopkinson Pressure Bar. Philosophical Transactions of the Royal Society of London. Series A, Mathema-tical and Physical Sciences, 1948, 240(821): 375-457.
8. Whittles DN, Kingman S, Lowndes I, et al. Laboratory and numerical investigation into the characteristics of rock fragmentation. Miner Eng, 2006, 19(14):1418–29.
9. Yi J, Boyce MC, Lee G F, et al. Large de-formation rate-dependent stress–strain behavior of polyurea and polyurethanes. Polymer, 2006, 47(1):319-329.
10. Armstrong, W. High strain rate properties of metals and alloys.International Materials Re-views, 2008, 53(3):105-128.
11. Li X, Zhou Z, Lok TS, et al. Innovative testing technique of rock subjected to coupled static and dynamic loads. International Journal of Rock Mechanics and Mining Sciences, 2008, 45(5): 739-748.
12. Tan Y, Yu X, Elmo D, et al. Experimental study on dynamic mechanical property of cemented tailings backfill under SHPB impact loading. International Journal of Minerals, Metallurgy, and Materials, 2019, 26(4): 404-416..
13. Dai F, Huang S, Xia K, et al. Some fundamental issues in dynamic compression and tension tests of rocks using split Hopkinson pressure bar. Rock mechanics and rock engineering, 2010, 43(6):657-666..
14. [Zhu WC, Bai Y, Li XB, et al. Numerical simulation on rock failure under combined static and dynamic loading during SHPB tests. International Journal of Impact Engineering, 2012, 49: 142-157.
15. Wu Q, Li X, Weng L, et al. Experimental investigation of the dynamic response of prestressed rockbolt by using an SHPB-based rockbolt test system. Tunnelling and Under-ground Space Technology, 2019, 93: 103088..
16. Su G, Zhai S, Jiang J, et al. Influence of radial stress gradient on strainbursts: an experimental study. Rock Mechanics and Rock Engineering, 2017, 50(10): 2659-2676.
17. Lok TS, Li XB, Liu D, et al. Testing and response of large diameter brittle materials subjected to high strain rate. J Mater Civil Eng ASCE, 2002, 14(3):262–9.
18. Li XB, Lok TS, Zhao J, et al. Oscillation elimination in the Hopkinson bar apparatus and resultant complete dynamic stress–strain curves for rocks. Int J Rock Mech Min Sci, 2000, 37(7):1055–60.
19. Li XB, Lok TS, Zhao J. Dynamic characteristics of granite subjected to intermediate loading rate. Rock Mech Rock Eng, 2005, 38(1):21–39.
20. Wang YF, Zheng XJ, Wang LP, et al.A similar test system with complete plane strain and applicable gradient stress: China, CN20141000 1118.6 [P]. 2014-04-30.
21. Jin JF, Chang JR,Y , et al. A loading experi-mental method and apparatus for axial asymp-totic static gradient stress: China,CN201610 073926.2[P]. 2016-06-22.
22. Jin JF,Zhang R,Wang XB, et al. Development of a rock gradient stress loading test device and its primary application.Chinese Journal of Rock Mechanics and Engineering, 2020, 39(08): 1547-1559.
23. Huang HJ, Wang JP, Mao YJ, et al. Influence of pretightening force of explosive bolts on impulse response. Journal of Vibration and Shock, 2015, 34(16):166-169.
24. Liu SH, Mao DB, Qi HX, et al. Stress wave propagation mechanism and energy consump-tion of combined coal and rock under static and dynamic loading. ournal of China Coal Society, 2014, 39(S1):15-22.
25. Wang HT, Xian XF. Study of elastic wave pro-pagation characteristics of rocks under complex stress conditions,Journal of Chongqing Univer-sity(Natural Sciences Edition, 1988, (05):52-59.
26. Fan X, Wang MY, Shi CC. study on effects of initial stress on stress wave propagation and block movement law.Chinese Journal of Rock Mechanics and Engineering, 2009, 28(S2): 3442-3446.
This work and its PDF file(s) are licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.