摘要
研究了四川白皎无烟煤电导率与甲烷压力和外加电压的关系。煤吸附甲烷后其交流和直流电导率都将增大。在直流电场中，煤的电导率σ与外加电压Ｕ和甲烷压力ｐ 成正比，其双变量方程为σ（ｐ，Ｕ） ＝ １ ．４６４ ＋ ０ ．７０５ｐ ＋ ２．３５５ ×１０－ ３ Ｕ＋ ２ ．９３０ ×１０ － ３ Ｕｐ 或σ（ｐ，Ｕ） ＝ １ ．４８１ｅｘｐ（０ ．３６９７ｐ） ＋ ２ ．５４８ ×１０ － ３ Ｕｅｘｐ（０ ．６８５８ｐ） ；在交变电场中，电导率随甲烷压力的升高而增大，但与外加电压值无关。
The effect of pressure of methane and voltage on conductivity of Baijiao anthracite has been studied.The direct current and alternating current conductivities of methane adorbing coal are greater than those of original coal.In direct current electric field,the conductivity of coal is directly proportional to the voltage and pressure of methane,respectively.The two variables equation of σ DC is as follows: σ(p,U)=1.464+0.705p+2.355×10 -3 U+2.930×10 -3 Up or σ(p,U)=1.481 exp (0.3697p)+2.548×10 -3 U exp(0.6858 p ).In altenating current electric field, σ AC is indepartment of voltage,and it increases with the increase of pressure of methane.Under the same of voltage and pressure of methane,altanating current apparent conductivity is greater than the direct current conductivity.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
1999年第5期133-137,共5页
Journal of Chongqing University
基金
国家教委博士点专项基金
