抽采过程中的瓦斯渗流及残余瓦斯赋存规律

项目名称： 抽采过程中的瓦斯渗流及残余瓦斯赋存规律

项目编号： No.41472134

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 汪吉林

作者单位： 中国矿业大学

项目金额： 72万元

中文摘要： 抽采后残余瓦斯的赋存状态将重新调整，并仍有突出危险性。本项目以淮南、淮北为研究区，针对抽采过程中的瓦斯渗流和残余瓦斯赋存规律的关键问题，在瓦斯性质、介质（煤岩）条件、地质环境条件等研究的基础上，应用室内煤岩变形观测、孔裂隙测试、渗透性实验、渗流模拟实验和数值模拟等方法，通过构造煤的分布规律与预测、抽采后残余瓦斯重分布规律等方面的研究，深入探讨残余瓦斯扩散-渗流的驱动机制、矿井构造与构造煤发育之间的量化关系，揭示残余瓦斯突出的主控因素及其相互作用机理，阐明抽采前后煤层瓦斯的运移趋势，建立残余瓦斯突出危险性的预测模型。预期将在宏观的瓦斯渗流规律与机理、残余瓦斯赋存规律及其突出危险性预测等方面取得创新成果，对于提高瓦斯抽采效率和瓦斯突出灾害预测与评价具有理论与实际意义。

中文关键词： 残余瓦斯；瓦斯抽采；渗流；赋存状态；煤与瓦斯突出

英文摘要： Residual gas occurrence after extraction will be readjusted, and the risk of outburst still exist. Aiming at the problem of gas seepage and residual gas occurrence during extraction, it will be researched from four aspects: the permeability of coal seam and the mechanism of gas seepage, the distribution law and its prediction of tectonically deformed coals, the redistribution law of residual gas after extraction, the evaluation and prediction on the outburst danger of residual gas,etc. Mining areas of Huainan and Huaibei were selected as region of interest. The research will be carried from three aspects: the characters of gas, medium (coals) conditions and geological environmental conditions. Many work should be completed including the observation of coals deformations, pores and fissures experiments, permeability experiments, seepage simulation experiments, numerical simulation and comprehensive analysis, etc. On that basis, driving mechanism of diffusion - seepage about residual gas will be studied, quantitative relationship between mine structure and tectonically deformed coals will be discussed, the redistribution law of residual gas after extraction and its main controlling factors will be disclosed. The research aims to reveal main controlling factors of residue gas outburst and the interaction mechanism of them, to clarify migration trends of coal seam gas before and after extraction, and to set up forecast models for the risk of residual gas outburst. The research has innovative significance in macroscopic gas seepage rules and mechanism, law of residual gas occurrence and gas outburst prediction, etc. And it has theoretical and practical significance in improving the efficiency of gas extraction, strengthening gas disaster prevention, and so on.

英文关键词： residual gas;gas extraction;seepage;occurrence;coal and gas outburst