【作者】 罗维；

【导师】 秦跃平；

【作者基本信息】 中国矿业大学（北京） ， 安全技术及工程， 2013， 博士

【摘要】 我国煤层赋存条件普遍复杂多变，煤体瓦斯解吸的机理，破断煤岩体内瓦斯流动规律的研究尚不充分。针对这一问题，本文围绕双重孔隙结构煤体瓦斯解吸流动规律展开研究，首先采用实验、理论与数值模拟相结合的方法，研究变压环境下煤块内部瓦斯流动机理；以此为背景，通过对煤体瓦斯解吸流动过程的分析，建立双重孔隙结构煤体瓦斯解吸流动数学模型；采用有限差分法对模型进行离散化处理，运用Visual basic语言对离散化的模型进行解算程序流程设计，编制煤体瓦斯流动工程分析软件，对煤体内部瓦斯解吸流动规律进行数值实验研究，得到巷道煤壁瓦斯压力，瓦斯含量分布规律，煤壁内破裂煤块瓦斯解吸放散规律以及煤体透气性系数和原始煤层瓦斯压力对煤壁内瓦斯压力分布，瓦斯含量分布的影响规律。该研究成果将为低透气性高瓦斯矿井煤层增透以及瓦斯抽采技术的研究提供科学的依据，同时，为低透气性高瓦斯煤层实现高效集约化开采起到理论指导的作用。更多还原

【Abstract】 The occurrence condition of coal seam in our country is complex and changeable,the mechanism of gas desorption and the law of gas flow in broken coal have not beensufficiently studied. To solve this problem, this paper focuses on the research of gasflow in coal of dual pore structure. It firstly uses the combined methods of experiment,theoretical analysis and numerical simulation to obtain the law of gas flow in lumpcoal; then, it set up the mathematical model of gas desorption and flow in coal of dualpore structure by analysis of gas desorption and its flow process after the coalexcavation, and it makes the software of coal gas flow engineering analysis using thefinite difference method to discrete the model and Visual basic language to design theprogram of the discrete model; finally, through the numerical experiments, thedistributions of gas pressure and content in the fracture and its surrounding lump coalare obtained, as well as the law of gas emission from the fracture and the law of gasdesorption and diffusion in lump coal. The results will provide the scientific basis forthe study on the technologies of increasing permeability and extracting gas in coalseam with low permeability and high gas, at the same time, it will play the role oftheoretical guidance in efficient intensive mining.更多还原