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通过电磁控制落锤冲击系统对大同塔山矿煤样进行定量循环冲击,冲击破坏后得到煤粉制样,并对其进行红外光谱特征分析。结果表明:煤体中含有大量氢键,氢键在冲击破坏过程中会发生断裂,塔山矿煤样主要表现为光谱波长3 400 cm~(-1)处的羟基自缔合氢键断裂;随着冲击强度的增大,氢键吸收强度降低;随着煤破坏加剧,氢键断裂需要的能量变大,氢键吸收强度下降趋势大大减缓,表现为非线性特征。
Through the electromagnetic control of the falling hammer impact system, the coal samples in Datong Tashan coal mine were quantitatively and cyclically impacted, and the pulverized coal samples were prepared after the impact damage. The infrared spectrum characteristics were also analyzed. The results show that the coal contains a large number of hydrogen bonds and the hydrogen bonds break down during the process of impact damage. The coal samples of Tashan Mine mainly show the self-association of hydrogen bonds at the spectral wavelength of 3,400 cm -1. As the impact strength increases, the hydrogen bond absorption strength decreases. With the increase of coal destruction, the energy required for hydrogen bond breaking increases, and the decrease tendency of hydrogen bond absorption intensity greatly slows down, showing a non-linear characteristic.