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选取赵各庄和忻州窑的2组煤样,放置于不同压力的二氧化碳气体环境中,观测煤样的径向和轴向变形,并对煤样进行了低温液氮吸附,同时采用Langmuir方程表征煤样应变与气体压力的关系,拟合参数εmax和pL分别反映了煤的最大变形值和煤体变形随气体压力的变化程度;忻州窑煤样的吸附变形和比表面积均大于赵各庄煤样,小孔和微孔含量丰富是造成煤样比表面积和吸附变形增加的根本原因。
Two sets of coal samples from Zhaogezhuang and Xinzhou kilns were selected and placed in carbon dioxide gas atmospheres with different pressures. Radial and axial deformations of the coal samples were observed. Low temperature liquid nitrogen adsorption was also performed on coal samples. Meanwhile, Langmuir equation was used to characterize coal The relationship between sample strain and gas pressure, the fitting parameters εmax and pL respectively reflect the maximum deformation of coal and the variation of coal deformation with the gas pressure. The adsorption deformation and specific surface area of Xinzhou kiln coal samples are larger than that of Zhaogezhuang coal samples , The abundance of pores and micropores is the fundamental reason for the increase of coal specific surface area and adsorption deformation.