论文部分内容阅读
为了研究不同煤体结构煤的吸附行为差异和作用机理,以焦作煤田为研究区,对煤体破坏严重的糜棱煤和原生结构煤的岩石学组成、吸附性和孔隙性进行了测试,结果表明:煤体破坏后,吸附、解吸能力增大;温度增加,煤的吸附能力均为下降,解吸能力增加.相比于原生结构煤,随着温度增加,糜棱煤吸附能力下降趋势和解吸能力增大趋势比原生结构煤更为明显.研究认为:煤体破坏后,不同孔径段的孔隙数量均有增大,使得煤样容纳气体的能力增大.特别是大中孔含量的增大,导致了糜棱煤样更容易发生解吸.另外,煤体破坏后的煤级增高、镜质组含量增大和惰质组含量减小也对吸附能力增大具有重要作用,而灰分含量不是决定两类煤吸附性差异的主要因素.
In order to study the difference and mechanism of adsorption behavior of coal with different coal structure, taking Jiaozuo coalfield as research area, the petrology composition, adsorption and porosity of mylonitized coal and primary structural coal with serious coal damage were tested. The results The results show that the adsorption and desorption capacities increase when the coal is destroyed, and the adsorption capacity of coal descends and desorption capacity increases with the increase of temperature.Compared with the primary structure coal, the adsorption capacity of millage coal descends and desorbs The trend of capacity increase is more obvious than that of primary structural coal.The study shows that: after the destruction of coal, the pore number of different pore size increases, which makes the ability of coal sample to contain gas increased.Especially the increase of large and medium pore content , Which led to more desorption of millain coal.In addition, the coal grade after the destruction of coal increased, increased vitrinite content and reduced inertinite content also plays an important role in the adsorption capacity, and the ash content is not decided The main factors of difference of two types of coal adsorption.