Experimental and simulation researches of loaded stress and gas environment on dynamics properties of gas-bearing coal during impact failure process

Kong, Xiangguo; Zhan, Mengzhao; Cai, Yuchu; Zhang, Chaolin; Wang, Enyuan; Li, Shugang; Yang, Songrui; He, Di

doi:10.1007/s10064-023-03519-3

Cited by 10 publications

(1 citation statement)

References 47 publications

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“…The behavior before and after fire load is determined 16 . Through the experimental and simulation study of the dynamic characteristics of the impact failure process of gas-bearing coal under loading stress and gas environment, Kong et al 17 found that there were significant differences in the influence of initial pore cracks on the strength of coal. The destructive mechanical behavior of granite at high temperature 18 , Wanne, T. S. et al 19 used the PFC2D program to develop a numerical model of granite with different mechanical parameters, and Kumari et al investigated the mechanical behavior of granite under in-situ stress and temperature conditions 20 , which simulated the expansion and rupture of the center of granite due to heat.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation study on the evolution law of mechanical properties of different metamorphic coals after heat treatment

Zhang,

Lai,

Huang

et al. 2024

Sci Rep

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In order to study the effect of temperature on the structure and mechanical properties of coal with different metamorphic degree. Three coal samples with varying degrees of metamorphism were chosen for analysis. The discrete element software PFC2D is used to simulate the heat treatment and compression of coal. The findings indicate that during the heating process, low-order coal exhibits noticeable thermal cracks at an early stage, while thermal crack development in middle-order coal is concentrated in the later stages. In contrast, high-order coal demonstrates a more stable macroscopic structure. The strength and stiffness of low rank coal show the lowest value and decrease significantly within 135 °C. However, the strength and stiffness of medium rank coal decrease significantly after 135 °C. The changes of mechanical properties and damage modes of coal caused by thermal damage are often ignored, which may lead to the deviation of design and research results from the actual situation. Therefore, this study is of great significance to the prevention and control of coal mine disasters.

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