Experimental study on dynamic mechanical property of coal under different impact velocities

机译：不同冲击速度下煤动力力学特性的实验研究

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The impact compression test of coal under different strain rate was carried out by Split-Hopkinson Pressure Bar of 75 mm in diameter.The dynamic compressive strength and elastic modulus of the coal, and the relationship between them and strain rate has been studied.The experimental result show that, the whole deformation process of coal includes four stages basically: compaction stage, elastic deformation stage, plastic stage and destruction stage;Coal has good linear elastic deformation characteristics before peak stress;The dynamic compressive strength and peak strain of coal depend on strain rate obviously, which both increased with the strain rate exponentially.

机译：通过直径为75mm的Split-Hopkinson压力棒对煤在不同应变率下的冲击压缩试验进行了研究，研究了煤的动态抗压强度和弹性模量以及它们与应变率之间的关系。结果表明，煤的整个变形过程主要包括四个阶段：压实阶段，弹性变形阶段，塑性阶段和破坏阶段；煤在峰值应力之前具有良好的线性弹性变形特性；煤的动态抗压强度和峰值应变取决于应变率很明显，两者都随应变率呈指数增加。

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来源
《Theory and Technique of Coal Mining and Disaster Prevention in Deep Mines: Proceedings of International Mining Conference 2014》|2014年|335-338|共4页
会议地点 Huainan(CN)
作者
ZHANG Wen-qing; SHI Bi-ming; XU Wei-bin;
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作者单位

School of Energy and Safety, Anhui University of Science and Technology, Huainan 232001, China;

Key Laboratory of Mine Safety and High-efficiency Mining, Ministry of Education , Anhui University of Science and Technololgy , Huainan 232001, China;

School of Energy and Safety, Anhui University of Science and Technology, Huainan 232001, China;

Key Laboratory of Mine Safety and High-efficiency Mining, Ministry of Education , Anhui University of Science and Technololgy , Huainan 232001, China;

Huainan Mining Industry Group, Huainan 232001, China;

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原文格式 PDF
正文语种 eng
中图分类矿山开采;
关键词
coal; split-Hopkinson pressure bar; strain rate; dynamic mechanical property;

机译：煤;分裂霍普金森压力棒;应变率;动态力学性能;

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Experimental study on dynamic mechanical property of coal under different impact velocities

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