屯兰矿区含瓦斯煤微结构定量表征  

Quantitative Characterization of Microstructure of Gas-bearing Coal in Tunlan Mining Area

作　　者：李江涛[1,2,3] 梁文勖 贺志宏 LI Jiang-tao;LIANG Wen-xu;HE Zhi-hong(School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China;Shenyang Research Institute,China Coal Technology and Engineering Group,Shenyang 110016,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China;Xishan Electricity Group Co. Ltd.,Taiyuan 030000,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]煤科集团沈阳研究院有限公司,辽宁沈阳110016 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122 [4]西山煤电(集团)有限责任公司,山西太原030000

出　　处：《东北大学学报（自然科学版）》2019年第6期886-890,共5页Journal of Northeastern University(Natural Science)

基　　金：国家大型油气田及煤层气开发科技重大专项(2016ZX05045-004-001);山西焦煤重大技术攻关项目

摘　　要：为了揭示含瓦斯煤微结构对瓦斯运移的意义,对屯兰矿区太原组含煤岩系不同埋藏深度7个煤样品进行了X射线衍射(XRD)定量表征,结合布拉格方程式,计算出煤微晶结构参数.研究结果表明,随着煤化程度增加,含瓦斯煤XRD图谱中(002)峰不对称性逐渐减弱,对应的延展长度(La)和堆砌高度(Lc)逐渐增加而层间距(d002)却减少;结合所建立的煤物质的单位体积数学模型,发现含瓦斯煤透气性系数、孔隙度与有序相体积之间具有显著的相关性,进而提出屯兰矿区深部煤层发生瓦斯突出的潜势比浅部煤层的高,因此需要加强对深部煤层瓦斯突出的预防工作.In order to reveal the significance of gas-bearing coal to gas migration, XRD quantitative characterization was carried out on 7 coal samples with different burial depths in Taiyuan Formation of Tunlan Mining Area, and the structural parameters of coal microcrystals were calculated by combining Bragg equation. The results show that with the increase of coalification, the asymmetry of peak(002)gradually decreases, while the corresponding extension length(La)and stacking height(Lc)gradually increase while the interval between layers(d002)decreases. Combined with the mathematical model of coal per unit volume, it is found that there is a significant correlation between permeability coefficient, porosity and ordered phase volume coal. Furthermore, it is proposed that the potential of gas outburst in deep coal seam in Tunlan mining area is higher than that in shallow coal seam, so it is necessary to strengthen the prevention of gas outburst in deep coal seam.

关 键 词：含瓦斯煤 微结构 定量表征 屯兰矿区 

分 类 号：TD713[矿业工程—矿井通风与安全]