侏罗纪煤层井工开采自燃机理及火区探测技术基础研究

项目名称： 侏罗纪煤层井工开采自燃机理及火区探测技术基础研究

项目编号： No.U1361130

项目类型： 联合基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 程根银

作者单位： 华北科技学院

项目金额： 60万元

中文摘要： 我国西北地区侏罗纪煤炭资源储量巨大，占我国各成煤时代煤炭资源总量39.6%。侏罗纪煤自燃情况普遍严重，且与我国中东部的石炭-二叠纪煤自燃倾向性差别较大。采空区自燃火源定位是灭火的关键，也是煤层自燃研究重点和难点。依据煤氧复合理论，进行侏罗纪煤层低温氧化实验、吸氧量实验和官能团测定实验，综合分析煤的低温氧化动力学特性、各官能团含量及其对自燃性能的影响，得出侏罗纪煤层自燃机理和特点。通过采空区温度、气体成分及浓度的测定，找出井工开采侏罗纪煤层自燃规律。由质量守恒定律、能量守恒定律、达西定律和菲克定律建立开采的流场模型、温度场及主要气体成分场模型，组成煤层自然发火数学模型。利用光纤测温得出采空区内边界实际温度，再运用数学模型解算采空区内温度分布，导出采空区火区范围。本项目研究成果，对预防控制侏罗纪煤层自燃、保证煤矿企业正常安全生产提高经济效益有十分重要意义。

中文关键词： 侏罗纪煤；；自然发火机理；；数值模拟；；自燃规律；；光纤测温

英文摘要： Huge Jurassic coal reserves in Northwest China accounts for 39.6% of the total coal resources formed in each coal-forming period. There's a big difference between the spontaneous combustion tendency of Jurassic coal and Carboniferous - Permian coal in middle-east China, and spontaneous combustion of Jurassic is generally serious. Goaf fire source positioning is the key of extinguishing, and always the emphasis and difficulty in spontaneous combustion research. On the basis of coal oxygen compound theory, we can take Jurassic coal low temperature oxidation experiment, oxygen uptake experiment and functional group determination experiment, and then we can make a comprehensive analysis of the dynamics of the low-temperature oxidation of coal, each functional group content and its influence on the spontaneous combustion performance. Finally we can get the Jurassic coal spontaneous combustion mechanism and characteristics. We can find out the law of spontaneous combustion of underground mining Jurassic coal through the determination of temperature, gas composition and concentration of goaf. We can establish the flow field model of underground mining, the temperature field and the main gas components field model by the law of conservation of mass and energy conservation law, Darcy's law and Fick's law, and compose the

英文关键词： Jurassic coal;；spontaneous combustion mechanism;；numerical simulation;；spontaneous combustion rule;；optical fiber temperature measurement