【作者】 卢国栋；

【导师】 周心权；

【作者基本信息】 中国矿业大学（北京） ， 安全技术及工程， 2010， 博士

【摘要】 运用燃烧学、流体力学、弹性力学、岩石力学、测量学等理论知识,研究了煤田火区燃烧机理及火区范围的圈划技术。对煤层的挥发份燃烧和碳燃烧进行了物理解析分析。推导出自重作用下的煤田火区煤层上下盘岩体内的最大剪应力分布规律,利用岩石真实破裂过程软件RFPA2D,对煤田火区燃烧诱发的上下盘岩体破坏模式进行了数值模拟计算,展现了煤田火区由于燃烧的发展而引起的地表塌陷模式和进程。分析了煤田火区气体流动的特点,利用FLEUNT软件模拟计算,指出煤田火区进风区域、出风区域、地面高温区域、火源区域、高压区域、气流最大速度区域、进风最大速度区域等的分布特点。提出了煤火熄灭过程中温度与时间的关系符合二次多项式的规律。提出了依岩层移动、气体流动特性、检测参数的三种煤田火区范围圈划方法。更多还原

【Abstract】 Coalfield fire area combustion mechanism and fire area demarcation technique have been studied in this thesis when utilizing theoretical knowledge including combustion science, hydromechanics, elastic mechanics, rock mechanics, and measuring etc; volatile combustion and carbon combustion of coal seam has been analyzed physically, from which it concludes the maximum shear stress distribution discipline in the ore mass at hanging wall and foot wall of coal seam in the coalfield fire area under the function of deadweight. By utilizing rock cracking process software RFPA2D, numerical simulation-based calculation has been conducted to the rock mass failure mode at hanging wall and foot wall caused by combustion in the coalfield fire area, and the mode and process of earth surface sinking caused by development of combustion have been presented. Characteristics of gas flow in the coalfield fire area have been analyzed; through simulated calculation with FLEUNT software, this thesis points out distribution of inlet air zone, outlet air zone, high-temperature zone on the ground, fire source, high-pressure zone, zone with the maximum airflow speed, zone with the maximum inlet air speed and etc. The discipline that the relation between temperature and time during the process of coal fire extinguishment complies with the quadratic polynomial has been brought forward, and three fire area demarcation methods (demarcation as per rock movement, characteristics of air flow, and monitoring data) have been proposed.更多还原