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选取层理面与轴向夹角θ为0°、30°、45°、60°和90°的无烟煤样,采用CHI660E型电化学工作站,在0~95℃温度下测试煤样的I-V曲线,提出串并联主导程度概念,采用最小势能原理和电荷极化原理,分析和研究不同温度下层理结构对电阻率的影响机理及规律.结果表明:无烟煤电阻率随温度升高呈现较强的规律性,当θ为0°时在55℃时出现拐点,其余均在35℃时出现拐点;串并联主导程度解释了层理结构对电阻率的影响机理,由关键层理面的数量和开始通过时间来决定;无烟煤电阻率受层理结构影响显著,随θ增大呈现递增规律;无烟煤各向异性系数随温度升高而增大,在35~65℃范围内,增大近2倍.
The anthracite samples with 0 °, 30 °, 45 °, 60 ° and 90 ° axial angles were selected. The IV curves of coal samples were tested at 0 ~ 95 ℃ using CHI660E electrochemical workstation, Based on the principle of minimum potential energy and charge polarization, the mechanism and rule of the influence of bedding structure on electrical resistivity under different temperatures are analyzed and discussed.The results show that the resistivity of anthracite exhibits a strong regularity with increasing temperature When θ is 0 °, the inflection point appears at 55 ° C, and the rest are inflexion point at 35 ° C. The leading degree of series-parallel connection explains the mechanism of the influence of the layer structure on the resistivity. The critical layer surface number and the start transit time The resistivity of anthracite is significantly affected by the bedding structure and shows an increasing law with the increase of θ. The anisotropic coefficient of anthracite increases with the increase of temperature and increases by nearly 2 times in the range of 35 ~ 65 ℃.