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研究含瓦斯煤层所处的地球物理场对煤瓦斯吸附特性的影响 ,对煤矿安全开采、煤瓦斯的抽放利用以及煤瓦斯突出的预测预报具有重要意义。笔者总结了地球物理场对煤吸附瓦斯特性的影响 ,认为地电磁场对煤瓦斯吸附作用机理还有待进一步的研究。并重点探讨了在交变电场作用下煤的吸附特性。利用容量法对 3种不同煤样在交变电场作用下的吸附特性进行了实验研究。结果表明 :交变电场的作用 ,并没有改变煤表面的化学性质和物质成分 ,煤的吸附和解吸仍很好地遵从Langmuir方程和二常数经验公式 ,并且由于交变电场作用使煤的表面势能增大和焦耳热效应使煤体温度增高 ,从而减弱了煤的吸附能力 ,减缓了解吸过程。
Studying the influence of the geophysical field containing gas and coal seam on the characteristics of coal gas adsorption is of great significance to coal mine safety exploitation, coal gas drainage and utilization and coal gas outburst prediction. The author summarizes the influence of geophysical field on the gas characteristics of coal adsorption, that the mechanism of the electromagnetic field on coal gas adsorption remains to be further studied. The adsorption characteristics of coal under alternating electric field are discussed emphatically. The adsorption capacity of three different coal samples under the action of alternating electric field was studied by the volumetric method. The results show that the effect of alternating electric field does not change the chemical properties and material composition of the coal surface. The adsorption and desorption of coal follow well the Langmuir equation and empirical formula of two constants, and the surface potential of coal Increasing and Joule heat effect makes the coal body temperature increase, thus weakening the adsorption capacity of coal and slowing the desorption process.