煤样变形破坏过程中全应变场分布规律

发布时间：2018-05-11 20:43

本文选题：数字散斑 + 单轴破坏　；参考：《煤矿安全》2017年12期

【摘要】：为了研究煤样变形破坏过程中全应变场的分布规律,利用TYJ-500KN微机控制电液伺服剪切流变试验系统和XTDIC三维光学数字散斑系统对煤岩样进行单轴压缩试验。根据数字散斑的计算结果对煤样全程的加载过程的位移演化进行研究。得到结论,在煤样剪切破坏时,数字散斑图像中位移集中带出现较早,且位移集中区域辨别明显。通过对煤加载破坏全过程监测,数字散斑系统可以准确预测破坏形式和试样的破坏位置。因此,对于煤样的破坏,数字散斑监测数据分析判别为较准确预测试样破坏位置起到重要作用,对探究煤样破坏位置及变化集中带分布规律也具有重要意义。
[Abstract]:In order to study the distribution of total strain field in the process of coal sample deformation and failure, uniaxial compression tests of coal and rock samples were carried out by using TYJ-500KN microcomputer controlled electro-hydraulic servo shear rheological test system and XTDIC three-dimensional optical digital speckle system. Based on the results of digital speckle calculation, the displacement evolution of the whole loading process of coal samples is studied. It is concluded that the displacement concentration zone appears earlier in the digital speckle image during the shear failure of the coal sample, and the area of displacement concentration is distinguished obviously. By monitoring the whole process of coal failure under loading, the digital speckle system can accurately predict the failure form and the failure position of the sample. Therefore, the digital speckle monitoring data analysis and discrimination plays an important role in accurately predicting the failure location of coal samples, and it is also of great significance to explore the failure location of coal samples and the distribution law of the change concentration zone.
【作者单位】：黑龙江科技大学黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室;黑龙江科技大学矿业工程学院;
【基金】：国家自然科学基金资助项目(51574115,51374097)
【分类号】：TD821

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