摘要
为了解U型通风下采空区遗煤层自然发火过程中,不同时间的温度和升温区的变化,提出使用颗粒流理论为基础的模型。解决氧的等效、流动和与煤反应的3个基本问题,并用FISH予以实现。根据实际工况模拟得升温过程可分为3个阶段,并分析了6个发展时间的升温特征,得遗煤发火自燃过程中升温区的变化与氧气流动有很大关系。采集这6个时间的实际遗煤层温度,分析与模拟结果的差别,得到模型还应考虑割煤时在遗煤层内部产生裂隙。改进后模型结果虽与实际升温区变化仍存在一定差异,但在升温时间与温度的关系方面更为准确,升温区扩散程度也更为接近事实。
To understand the change of temperature and heating area, in different time, in the process of spontaneous combustion of goaf under 'U' type ventilation, the model was proposed based on the theory of particle flow. The three basic problems of Oxygen equivalent flow and reaction with the coal were solved, and implemented with FISH. According to the actual working condition, the heating process was simulated, which could be divided into three stages, and the characteristics of the six warming development time were analyzed, finding that the heating area change was related with the oxygen flow in the process of spontaneous combustion of coal. Collection of the six time of heritage coal actual temperature, and the difference between these and simulation results were analyzed; It was generated that the coal seam crack considering cutting coal should also be additional. The improved model results still exist certain differences with the actual heating area change, but in terms of the relationship between the heating time and temperature is more accurate, the spread of degree of heating area is much closer to the truth.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2015年第12期3096-3101,共6页
Journal of System Simulation
基金
国家自然科学基金(51274110
51474121
51274113)
国家自然科学基金煤炭联合基金项目(U1261121)
关键词
U型通风
采空区
遗煤自燃过程
颗粒流
遗煤裂隙
模型改进
u type ventilation
goaf,spontaneous combustion
pfc
coal seam crack
simulation and improvement 1
