阜康矿区煤的孔隙与裂隙特征

煤的孔隙与裂隙是煤层气赋存的空间也是煤层气运移和产出的通道。在新疆阜康矿区三工、建江等7对矿井巷道煤层裂隙观测统计的基础上，采用宏观煤岩分析、显微煤岩分析、压汞实验与煤的孔隙结构分析等方法，研究阜康矿区煤层孔隙与裂隙特性，评价煤层气赋存特征与渗透性。结果表明:阜康矿区煤层孔隙发育以微孔和小孔为主，孔容和比表面积较大，有利于煤层气的吸附和解吸；裂隙发育具有非均质性，矿区西部裂隙最为发育，东部次之，中部不发育；煤岩组分中镜质组的增加会使微小孔增多，有利于煤层气的吸附；中孔孔容对孔隙度具有控制作用；阜康矿区煤层的孔隙率随着镜质体反射率的增大呈增大的趋势。研究结果对新疆阜康矿区煤层气的勘探开发具有一定的理论指导意义。 

Characteristics of the pore and fracture in Fukang mining area

The pore and fracture of coal are the deposit space and channels used for migration and output of coalbed methane. In this paper, we studied the characteristics of pore and fracture and evaluated occurrence characteristics and permeability of coalbed methane in Fukang mining area through the methods of macroscopic and microscopic analysis of coal and rock, mercury injection and pore structure analysis of coal. The results show that the micro-pore of Fukang mining area is large and it is conducive to the adsorption and desorption of coalbed methane. Fracture development has the character of heterogeneity that the fracture in the west of Fukang mining area is the most developed, followed by the east, not developed in the center. Vitrinite increase results the increment of small and micro pores of coal, and it is conductive to absorption of CBM. The porosity is controlled by mesopore volume. The porosity of coal in Fukang mining area tends to increase with vitrinite reflectance. The results have some theoretical significance for the exploration and development of coalbed methane in Fukang mining area.