采空区自然发火三带分布规律及自燃防治技术

摘要

Low temperature oxidation rule of coal sample in Malan coal mine is got by oil bath type coal low tem-perature oxidation experiment,the permeability coefficent distribution of the coal mine goaf is obtained through numer-ical simulation,the mathematical model of multi physical field coupling space -time evolution theory on goaf sponta-neous combustion under the moving coordinate is established.Combines with laboratory experiment,theoretical analy-sis,field test and numerical simulation results,obtains the minimum safety advancing speed of working face,formu-lates the coal mine goaf spontaneous combustion prevention and control measures.%通过油浴式煤低温恒温氧化实验得到了马兰矿煤样的低温氧化规律，通过数值模拟测得了该矿采空区的渗透系数分布，建立了移动坐标下的采空区自然发火多物理场耦合时空演化理论数学模型，并结合实验室试验、理论分析、现场测试和数值模拟结果，得出该矿工作面的最小安全推进速度，并制定了该矿采空区自然发火防治措施，确保了工作面的安全、高效生产，取得了一定的经济效益。