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为了更好地认识和防治煤与瓦斯突出,选取原生结构煤和构造软煤代表性样品。利用显微镜、压汞、IS-100型等温吸附解吸仪、MYS-Ⅰ型煤岩样渗透率测试设备和瓦斯煤岩体气固耦合参数测试仪,对2种煤样的物理力学特征进行研究。对比分析其微观结构特征、吸附特性、渗透特性和力学特性。试验结果表明,构造软煤的结构破坏严重,微观裂隙孔隙发育,总孔容是原生结构煤的2～3倍,比表面积是原生结构煤的1.75倍,吸附能力约为原生结构煤的4倍,渗透率约为原生结构煤的10倍,煤体强度明显低于原生结构煤。在试验研究的基础上,分析构造软煤的物理力学特性对煤与瓦斯突出的影响。
In order to better understand and prevent the outburst of coal and gas, select the primary structure coal and construct the representative sample of soft coal. The physical and mechanical characteristics of two kinds of coal samples were studied by means of microscope, mercury intrusion, IS-100 isothermal adsorption and desorption apparatus, MYS-Ⅰ coal-rock permeability test equipment and gas-solid coupling parameter tester. Comparative analysis of its microstructure characteristics, adsorption characteristics, permeability characteristics and mechanical properties. The results show that the structure of soft coal is seriously damaged and the microscopic fractured pores are developed. The total pore volume is 2 to 3 times that of primary structural coal, and the specific surface area is 1.75 times that of primary structural coal, and its adsorption capacity is about 4 times that of primary structural coal , Permeability of about 10 times the original structure of coal, coal strength was significantly lower than the primary structure of coal. Based on the experimental study, the influence of the physical and mechanical properties of soft coal on the coal and gas outburst is analyzed.