CAJ | 학술논문

针对煤堆自燃趋势的预报问题，建立包括煤低温氧化动力学模型、煤堆等效热传导方程和煤堆孔隙中的氧气扩散方程相互耦合的煤堆自燃趋势预报模型。采用坐标变换的方法把煤堆断面变换成规则的计算平面后进行离散化处理，并对离散化代数方程组进行求解。在煤堆表面为对流边界的条件下，计算得到煤堆温度场、氧气浓度场的分布和随时间变化规律。初步分析结果表明，该模型能够合理解释煤堆自燃的趋势和着火位置。
침대매퇴자연추세적예보문제，건립포괄매저온양화동역학모형、매퇴등효열전도방정화매퇴공극중적양기확산방정상호우합적매퇴자연추세예보모형。채용좌표변환적방법파매퇴단면변환성규칙적계산평면후진행리산화처리，병대리산화대수방정조진행구해。재매퇴표면위대류변계적조건하，계산득도매퇴온도장、양기농도장적분포화수시간변화규률。초보분석결과표명，해모형능구합리해석매퇴자연적추세화착화위치。
Aiming at prediction problem of spontaneous combustion trend of coal dump,prediction model of spontaneous combustion trend of coal dump for intercoupling of dynamics model of coal low temperature oxidation,equivalent equation of heat conduction of coal dump and oxygen diffusion equation for coal dump hole were established.Coordinate transformation method was used for trans-forming fracture section of coal dump into regular calculation plane for discretization treatment and solve the discretization algebraic equation.Under the condition of coal dump surface as convective boundary,temperature field of coal dump,distribution of oxygen concentration field and change rule with time was worked out.Preliminary analysis indicates that this model could reasonably explain spontaneous combustion trend of coal dump and the firing position.