【作者】 赵丽娟；

【导师】 秦勇；

【作者基本信息】 中国矿业大学 ， 地质资源与地质工程， 2014， 博士

【摘要】 我国煤储层渗透率普遍偏低，依托新的原理，研发新的煤层激励技术，是提高我国煤层气开发效果的重要途径。为此本文采用超声波和脉冲冲击波方法开展模拟实验，对比分析了波动作用前后煤岩孔隙性、渗透性和吸附－解吸性的变化规律，建立了相关数学模型，取得某些创新认识。发现超声波对提高煤岩渗透率和解吸率具有明显的促进作用，建立了超声波作用下煤岩渗透率数学模型以及吸附常数模型，从机械效应、增温效应等方面对其机理进行了探讨。建立了冲击波煤岩致裂增渗物理模拟实验方法，开展了较为系统的模拟实验，发现了冲击波载荷与煤层致裂效果之间的关系，建立了冲击波参数与煤岩渗透率变化之间的数学模型，结合压汞、X-CT、力学性质等实验观测，进一步探讨了冲击波增渗机理。更多还原

【Abstract】 The permeability of the coal reservoir is generally low in our country, relying on thenew principle, and developing new incentive technology on coal seam, is an importantapproach to improve the effect of the development of coalbed methane in our country. Sothe ultrasound and pulse wave method was used to carry out the simulation experiments inthis dissertation, the changing rules on the porosity, permeability and adsorption–desorption of the coal rock were analysised contrastive before and after the effect of thewave, relative mathematical model was established, and some innovations were achieved.Ultrasound has obvious role in improving the permeability and desorption rate of the wasfound, and permeability mathematical model and adsorption constants model of the coalrock were established under ultrasound, the mechanism are discussed from mechanicaleffect, temperature raising effect and other areas. Physical simulation experiment methodson firacturing and permeability increasing of the coal rock were established, andSystematic simulation experiments were carried out, and the relationship between theshock wave loading and the firacturing effect of coal seam was found, the mathematicalmodel between shock wave parameters and permeability changing of the coal rock wasestablished, combining experimental observation such as mercury injection, X-raycomputed tomography (CT), mechanical properties and so on, the mechanism of shockwave on increasing the permeability was explored furtherly.更多还原