松藻矿区原生结构煤与构造煤物性差异研究

Study on Characteristic Differences of Primary Structured Coal and Structual Coal in Songzao Mining Area

为了研究重庆松藻矿区原生结构煤与构造煤的物性差异,采用压汞法、等温吸附实验等研究了不同煤体结构煤物性差异。结果表明:随着煤破坏程度增加,真密度、孔隙度、水分M_(ad)、灰分A_d、挥发分V_d均呈先减小后增大趋势,碎裂煤最小;构造作用对煤的不同孔径容积均有影响,总孔容呈降低趋势,但均以微孔为主;原生结构煤以开放孔为主,连通性好;构造煤存在半封闭孔隙(墨水瓶孔),连通性差;与原生结构煤和碎粒煤相比,碎裂煤吸附量较低。

In order to study differences in physical properties between the primary structural coal and the structural coal in Chongqing Songzao mining area,mercury physical properties and isothermal adsorption experiments are used to study on characteristic differences in coal physical properties of different coal structures.The results show that the true density,porosity,moisture Mad,ash Ad and volatile matter Vd decrease first and then increase with the increase of coal damage degree,and the fragmentation coal is the minimum;the tectonic action has different pore volume for coal.Influencing,the total pore volume showed a decreasing trend,but all were micropores;the primary structural coal was open pores with good connectivity;the structural coal had semi-closed pores(inkwell holes)and poor connectivity;and the primary structural coal and compared with grinded coal,the adsorption capacity of fragmented coal is lower.