School of Resources and Environment,Henan Polytechnic University

煤体变质程度和变形结构不同,其对甲烷的吸附/解吸能力及特征也不同,通过对河南典型矿区5种中高煤阶构造变形煤的等温吸附/解吸试验研究,结果表明:中-高煤阶弱脆性构造变形煤的甲烷吸附能力随着煤变质程度的增加而增大;甲烷吸附量增量随着压力升高逐渐减小趋近于0,且甲烷吸附量增量随变质程度的增加而增大。单位压力段内甲烷解吸量随压力降低呈幂函数增大趋势,且变质程度越高,单位压力段内甲烷解吸量越大。不同类型构造变形煤单位压力段解吸量随压力降低呈单调递增的对数函数,且甲烷解吸量随着构造变形程度的增强而增大。

The methane adsorption 1 desorption capacity and characteristics were related to the degree of coal metamorphism and deformation structure. The isotherm al adsorption 1 desorption experiment of five medium and high rank tectonic deformation coals samples at typical mining fields in Henan Province were conducted,the result s showed that the methane adsorption capacity of weak brttle tectonic deformation coals of medium and high rank increased with increasing along with the degree of coal metamorphism.As the pressure rised,the increment of methane absorption quantity decreased gradually and tended to zero,while the increment of methane absorption qua ntity increased with the increment of the degree of coal metamorphism. The methane desorption quantity during unit pressure within the period increased with power functi on with the pressure decreasing. With the degree of coal metamorphism increased,the methane desorption quantity during unit pressure within the period increased.The me thane desorption quantity curve was monotone increasing logarithmic function with pressure decreased to different tectonic deformation coals ,the methane desorption quan tity was improved with the increasing tectonic deformation degree.

国家科技重大专项资助项目(2011ZX05060-005)；国家自然科学基金资助项目(41372161)；河南省高校科技创新人才支持计划资助项目(13HASTIT030)；