新集一矿构造煤与原生结构煤孔隙结构特征差异研究

he coal samples of Xinji No.1 coalmine were divided into two groups: the deformed coal and the un-deformed coal, based on the analysis on the pressurized mercury experiments and the isothermal adsorption experiments of nitrogen in low temperature, the result shows that: the coal porosity gives priority to micro pores and small pores, the average content is over eighty percent, the specific surface area of this coalfield mainly comes from the micro pores and small pores; The deformed coal and the un-deformed coal have certain difference: the mesopore content, the micro pore content, the porosity factor, the total pore volume and the accumulated specific surface area in the deformed coal is larger than that in the un-deformed coal, the coal deformation to a certain extent can be in favor of gas drainage.