煤层流变研究现状及发展趋势

Research Situation and Development Trend of Coalbed Rheology

近些年来,岩石流变已成为大陆岩石圈研究的前沿和热点之一,受到国内外越来越多的科学家的重视。由于浅、表岩石圈层中煤岩是含气、含水的多相介质有机岩,具有低杨氏模量和高泊松比的岩石力学性质,因此其流变行为与无机岩类存在很大的差异。当前,国内研究者主要通过在天然条件下的煤层流变不同尺度的观测,并进行高温高压变形实验与天然条件下煤岩流变的对比研究,用以阐明煤层流变的特征;通过观测、实验与模拟分析,获取流变参数,探讨煤层流变过程,建立流变模式,进而揭示煤层流变的机理与制约因素。在分析国内外煤层流变研究现状的基础之上,探讨了煤层流变研究存在的问题及今后的发展趋势。并认为对煤层流变的研究既可进一步丰富和发展对地球层圈构造和地球物质流动的认识,也可为煤层的合理开采、煤层气勘探开发与煤矿瓦斯突出防治提供科学依据。

In recent years, rock rheology has become one of front edges and hot points of continental lithosphere research, which paid attention to by more and more scientists all over the world. Because coallbed rock is muhi-phased media of gas- and water-bearing organic rocks with mechanical properties of lower Young＇s modulus and higher Poisson＇s ratio, the rheological behavior of combed is quite different from inorganic rocks. At present, domestic scientists are mainly through observations on different scale coalbed rheology under natural condition, and use high temperature and high pressure deformational experiments to explain the characteristics of coalbed rheology; moreover, through observations, experiments and simulation analyses to get rheologie parameters, discuss rheologic process and establish rheologic modes, then proceed to reveal mechanism and restrictive factors of coalbed rheology. Based on the research situation of eoalbed theologic analyses both at home and abroad, we discussed existing problems on coalbed rheologic researches and development tendency in the future. We think that these researches not only could enrich and develop the theory of material flow in the layered structure of earth, but also could provide scientific basis of eoalbed rational exploitation, coalbed methane exploration and coalmine gas outburst control.