Influence of water content on dynamic mechanical properties of coal

被引：20
作者：
Gu, Helong [1 ]
Tao, Ming [1 ]
Wang, Jingxiao [1 ]
Jiang, Haibo [1 ,2 ]
Li, Qiyue [1 ]
Wang, Wen [3 ]
机构：
[1] Cent South Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China
[2] Hunan Vocat Inst Safety Technol, Safety Engn Inst, Changsha 410151, Henan, Peoples R China
[3] Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo 454003, Henan, Peoples R China
来源：
GEOMECHANICS AND ENGINEERING | 2018年 / 16卷 / 01期
基金：
中国国家自然科学基金;
关键词：
coal; water content; dynamic mechanical properties; stress wave propagation; failure features; TENSILE-STRENGTH; ROCK; FRACTURE; FAILURE; BAR;
D O I：
10.12989/gae.2018.16.1.085
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Water affects the mechanical properties of coal and stress wave propagation. To comprehensively investigate the effect of water content on the properties of coal, laboratory tests including X-Ray Diffraction (XRD) analysis, P-wave test, S-wave test, static and dynamic compression test with different water contents were conducted. The compressive strength, elastic modulus and failure strain and their mechanism of coal specimen under coupled static-dynamic load with the increased water content were observed. Meanwhile, energy transmission and dissipation characteristics of a stress wave in coal specimens with different water contents under dynamic load and its relation with the failure features, such as fragmentation and fractal dimension, of coal was analyzed. Furthermore, the dynamic interpretation of water infusion to prevent coal burst based on water infusion model of coal seam roadway was provided.
引用
收藏
页码：85 / 95
页数：11
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