An experimental study on stress wave propagation and attenuation of sandstone during stress unloading process

被引：0

作者：

Cheng Y. ^{[1
]}

Song Z. ^{[1
,2
]}

Jin J. ^{[3
]}

Wang J. ^{[1
,2
]}

Yang T. ^{[2
,4
]}

机构：

[1] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an

[2] Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi'an

[3] School of Architectural and Surveying Engineering, Jiangxi University of Science and Technology, Ganzhou

[4] China Railway Bridge Engineering Bureau Group Co., Ltd., Tianjin

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 08期

关键词：

Attenuation characteristics; P-wave velocity; Stress wave; Wave peak; Waveform;

D O I：

10.13465/j.cnki.jvs.2020.08.022

中图分类号：

学科分类号：

摘要：

Due to the complexity of excavation and unloading of rock mass and redistribution of original rock stress, surrounding rock mass was usually in complex stress unloading environment. For the purpose of investigating the propagation and attenuation characteristics of stress wave in sandstone during stress unloading process, a strip specimen with length to diameter ratio L/D≈65 was designed, and small disturbance impact tests under different axial unloading stresses were carried out by dynamic and static combined loading test devices. The stress wave signals of sandstone were measured, and the effects of different unloading stress on wave waveform, P-wave velocity, temporal-spatial attenuation characteristics, wave peak, and attenuation rate of wave peak were studied, and the empirical models were established. The results show that whether the sandstone had unloading stress or not had significant effect on waveforms. With the stress unloading, the P-wave velocities attenuated in the form of "approximately linearly stage+nonlinear stage", and wave peak and its attenuation rate were exponentially changed. With the increase of distance and time, the wave peaks show an exponential attenuation, and temporal-spatial attenuation of wave peaks at different unloading stress stages had different sensitivity. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：151 / 158

页数：7

共 27 条

[1] SONG Zhanping, LI Shihao, ZHANG Xuegang, Et al., Study on strata settlement regular pattern induced by tunnel construction based on Peck formula, Journal of Xian University of Architecture and Technology (Natural Science), 50, 2, pp. 190-195, (2018)
[2] SONG Z P, YANG T T, JIANG A N, Et al., Experimental investigation and numerical simulation of surrounding rock creep for deep mining tunnels, Journal of the Southern African Institute of Mining and Metallurgy, 116, 12, pp. 1181-1188, (2016)
[3] ABOLFAZLZADEH Y, HUDYMA M., Identifying and describing a seismogenic zone in a sublevel caving mine, Rock Mechanics and Rock Engineering, 49, 9, pp. 1-17, (2016)
[4] RESENDE R, LAMAS L, LEMOS J, Et al., Stress wave propagation test and numerical modelling of an underground complex, International Journal of Rock Mechanics and Mining Sciences, 72, pp. 26-36, (2014)
[5] PAN Bo, GUO Lianjun, NING Yuying, Et al., Analysis of rocks dynamic response under cyclic dynamic loading, Mining Research and Development, 38, 8, pp. 39-44, (2018)
[6] FAN L F, SUN H Y., Seismic wave propagation through an in-situ stressed rock mass, Journal of Applied Geophysics, 121, 13, pp. 13-20, (2015)
[7] LI D, ZHAO F, ZHENG M., Fractal characteristics of cracks and fragments generated in unloading rock burst tests, International Journal of Mining Science and Technology, 24, 4, pp. 819-823, (2014)
[8] OMER, AYDAN, KUMSAR H., an Experimental and Theoretical Approach on the Modeling of Sliding Response of Rock Wedges under Dynamic loading, Rock Mechanics and Rock Engineering, 43, 6, pp. 821-830, (2010)
[9] MA G W, FAN L F, LI J C., Evaluation of equivalent medium methods for stress wave propagation in jointed rock mass, International Journal for Numerical and Analytical Methods in Geomechanics, 37, 7, pp. 701-715, (2013)
[10] SAINOKIATSUSHI, MITRIHANI S., Numerical simulation of rock mass vibrations induced by nearby product, Canadian Geotechnical Journal, 51, 11, pp. 1-10, (2014)

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