论文部分内容阅读
应用固定质量法对煤样冲击破坏过程中电磁辐射信号的多重分形维数进行计算。结果表明:煤样冲击破坏过程中产生的电磁辐射具有分形特征;曲线D_q-q的陡峭程度与试样的应力水平有密切联系,并用曲线斜率k来表征应力大小。分析发现斜率k的变化与煤岩失稳破坏过程具有较好的一致性,为电磁辐射预测预报煤岩冲击破坏提供了一种分析手段。
The fixed mass method was used to calculate the multifractal dimension of electromagnetic radiation signals during the impact damage of coal samples. The results show that the electromagnetic radiation generated during the impact damage of coal sample has fractal characteristics. The steepness of curve D_q-q is closely related to the stress level of the sample, and the slope of the curve k is used to characterize the stress magnitude. The analysis shows that the change of slope k has good consistency with the failure process of coal and rock, and provides an analytical method for predicting and predicting coal rock impact damage by electromagnetic radiation.