|本期目录/Table of Contents|

[1]刘佳亮,张娣.水力侵彻煤岩液固非接触区应力波传播特性研究[J].中国安全生产科学技术,2018,14(7):92-98.[doi:10.11731/j.issn.1673-193x.2018.07.014]
 LIU Jialiang,ZHANG Di.Study on propagation characteristics of stress wave in liquidsolid noncontact area of coal rock with hydraulic penetration[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(7):92-98.[doi:10.11731/j.issn.1673-193x.2018.07.014]
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水力侵彻煤岩液固非接触区应力波传播特性研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年7期
页码:
92-98
栏目:
职业安全卫生管理与技术
出版日期:
2018-07-31

文章信息/Info

Title:
Study on propagation characteristics of stress wave in liquidsolid noncontact area of coal rock with hydraulic penetration
文章编号:
1673-193X(2018)-07-0092-07
作者:
刘佳亮12张娣1
(1.重庆交通大学 土木工程学院,重庆 400074;2.交通土建工程材料国家地方联合工程实验室,重庆 400074)
Author(s):
LIU Jialiang12 ZHANG Di1
(1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;2. National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials, Chongqing 400074, China)
关键词:
水力侵彻煤岩应力波传导
Keywords:
hydraulic penetration coal rock stress wave conduction
分类号:
X936;TD82
DOI:
10.11731/j.issn.1673-193x.2018.07.014
文献标志码:
A
摘要:
为探索水力作用下煤岩液固非接触区应力波波动规律,以及岩性、水力参数对应力波传导的影响特征,基于流体力学、损伤力学及流固耦合罚函数算法等,建立了水力侵彻煤岩三维数值模型。研究结果表明:水力侵彻煤岩液固非接触区应力波沿射流径向由非线性波动渐变为弹性波动,应力波波形渐宽,周期增长,振幅减小;波阵面传导速度随距离增加显著降低;应力峰值呈强衰减、缓衰减以及稳定衰减三阶递减趋势;水力侵彻下焦煤内水力诱发应力波的传导速度高于无烟煤,而相同位置处无烟煤的应力峰值要大于焦煤;射流速度与应力峰值具有显著的正相关性,射流速度越大应力波衰减也越为迅速;应力波传播到不同属性分界面会发生明显的反射、透射及绕射现象,应力波穿过分界面时发生了大幅衰减。
Abstract:
In order to explore the fluctuation laws of stress wave and the influence of lithology and hydraulic parameters on the conduction of stress wave in the liquidsolid noncontact area of coal rock under the hydraulic effect, a threedimensional numerical model of coal rock with the hydraulic penetration was established based on the fluid mechanics, the damage mechanics and the fluidsolid coupling penalty function algorithm. The results showed that the stress wave in the liquidsolid noncontact area of coal rock with the hydraulic penetration transformed from the nonlinear fluctuation to the elastic fluctuation gradually along the radial direction of jet flow, and the waveform of the stress wave grew wider, the cycle got longer, and the amplitude became smaller. The conduction velocity of wave front decreased significantly with the increase of distance. The peak stress presented the threeorder decline trend, including the strong attenuation, slow attenuation and stable attenuation. The conduction velocity of stress wave by the hydraulic induction in the coking coal with the hydraulic penetration was higher than that in the anthracite, while the peak stress of the anthracite was higher than that of the coking coal at the same location. The velocity of jet flow had a significant positive correlation with the peak stress, and the higher the velocity of jet flow, the more rapid the attenuation of stress wave. The obvious phenomena of reflection, transmission and diffraction would occur when the stress wave propagated to the interface of different properties, and the stress wave attenuated dramatically when it passed through the interface.

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备注/Memo

备注/Memo:
国家自然科学基金项目(51608082);重庆市科委基础与前沿研究项目(cstc2016jcyjA0374);重庆市教委科学技术研究项目(KJ1500509)
更新日期/Last Update: 2018-08-09