贵州高瓦斯低渗透难抽采煤层的细观特征试验研究

发布时间：2018-06-01 09:51

本文选题：孔隙度 + 孔连通性　；参考：《工业安全与环保》2017年10期

【摘要】：为了探究贵州煤层高瓦斯低渗透难抽采的原因,以其细观特征为切入点,以贵州富煤区4个高瓦斯低渗透难抽采煤层为研究对象,就煤样的孔隙度、孔径大小、比表面积及孔的连通性等参数对煤层的细观特征进行了分析,分析结果表明:(1)4个试验煤样孔隙度较大,有利于瓦斯的赋存,瓦斯大部分储存在粒间的孔隙内;(2)微孔主要以半封闭孔和封闭孔为主且连通性较差不利于瓦斯的解吸和扩散;(3)煤的微孔比表面积较大,相应的a值也相对较大;煤的微孔孔体积较大,相应的b值也较大。
[Abstract]:In order to explore the reasons of high gas and low permeability difficult extraction in Guizhou coal seam, taking its meso characteristics as the breakthrough point and taking 4 high gas and low permeability difficult mining coal seams in Guizhou coal rich area as the research object, the porosity and pore size of coal sample are studied. The specific surface area and the connectivity of holes are used to analyze the mesoscopic characteristics of coal seams. The results show that the porosity of the four test coal samples is large, which is beneficial to the occurrence of gas. Most of gas stored in intergranular pores is mainly semi-closed pore and closed pore, and poor connectivity is not conducive to gas desorption and diffusion. The specific surface area of micro-pore is larger, and the corresponding a value is relatively larger. The pore volume of coal is larger, and the corresponding b value is larger.
【作者单位】：贵州大学矿业学院;贵州省非金属矿产资源综合利用重点实验室;贵州省优势矿产资源高效利用工程实验室;复杂地质矿山开采安全技术工程中心;
【基金】：国家自然科学基金(51574093) 贵州省科学技术基金(黔科合J字[2015]2049号) 贵州省高校工程技术研究中心建设项目(黔教合KY字[2013]112) ; 贵州省科技厅、贵州大学联合资金计划项目(黔科合LH字[2014]7654) 贵州大学引进人才项目(贵大人基合字(2015)30号);贵州大学矿业学院研究生创新基金项目(院研20160101)
【分类号】：TD712.6

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