放顶煤开采采空区自然发火数值模拟的应用研究

Numerical Simulation of Spontaneous Combustion Process of Top coal caving in Goaf

本文针对新峪矿5112工作面的特征,根据采空区内的气体质量守恒和浮煤与气体的能量守恒利用数学方法建立采空区内流场方程、氧浓度场方程和温度场方程,并根据采空区的实际状况设定相应的边界条件,得到采空区内的温度分布,从而预测在不同的条件下预测采空区内自然发火状况。结果表明,该煤层注入阻化剂后采空区煤自然发火危险性均有大幅度降低。

Through XinYun Mine 5112 fully mechanized working face anti-inhibitor pretreatment top coal caving Spontaneous Combustion Simulation; Mined areas under the mass conservation of gas and floating coal and gas energy conservation using mathematical methods to establish the flow field equations mined areas, oxygen concentration and temperature field equations field equations, numerical analysis by solving the temperature distribution of mined areas ; predict mined areas under different condi- tions spontaneous combustion conditions ; value Simulation results shown that top coal caving GOB risk of spontaneous combustion were significantly reduced.