基于数值分析的煤炭自燃临界温度计算方法研究  

Study on Calculation Method of Critical Temperature of Coal Spontaneous Combustion Based on Numerical Analysis

作　　者：骆大勇[1,2] 秦汝祥[2,3] 刘振 LUO Dayong;QIN Ruxiang;LIU Zhen(Chongqing Vocational Institute of Engineering,Chongqing 402260,China;School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan,Anhui 232001,China;Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining,Huainan,Anhui 232001,China;Xutuan Coal Mine of Huaibei Mining Group,Haozhou,Anhui 233501,China)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]安徽理工大学安全科学与工程学院,安徽淮南市232001 [3]煤炭安全精准开采国家地方联合工程研究中心,安徽淮南市232001 [4]淮北矿业集团许疃煤矿,安徽亳州市233501

出　　处：《矿业研究与开发》2022年第10期132-136,共5页Mining Research and Development

基　　金：国家自然科学基金资助项目(51574009,51774014);重庆市自然科学基金面上项目(2022NSCQ-MSX3598);重庆市教委科学技术研究项目(KJQN202203416).

摘　　要：煤炭温度是决定煤炭自燃发展程度的关键因素和可靠因素。煤炭自燃临界温度一般为70~80℃,为了能够及时采取有效措施将温度控制在临界温度以下,开展了通过测定CO体积分数计算煤岩自燃过程中煤体温度的研究。通过试验得出煤炭在低温氧化过程中温度和CO体积分数数据,利用数值分析原理,建立温度与CO体积分数之间的关系模型,求解得出该模型的反函数,从而建立CO体积分数与煤炭自燃过程中温度的函数关系,实现了通过测定CO体积分数计算煤炭自燃过程中煤体温度的目的。许疃煤矿某工作面工程实例验证结果表明,该方法的预测精度能达到工程要求,为煤炭自燃临界温度的预测提供一种较为可靠的手段。Coal temperature is the key and reliable factor to determine the development of coal spontaneous combustion.The critical temperature of coal spontaneous combustion is generally 70-80℃.In order to take effective measures to control the coal temperature below the critical temperature in time,a study was carried out to calculate the coal temperature during coal spontaneous combustion by measuring the CO volume fraction.The temperature and CO volume fraction data of coal in the low-temperature oxidation process were obtained through experiments.Using the principle of numerical analysis,the relationship model between temperature and CO volume fraction was established,and the inverse function of the model was solved.Thus,the functional relationship between CO volume fraction and temperature in the process of coal spontaneous combustion was established,realizing the purpose of calculating coal temperature in the process of coal spontaneous combustion by measuring CO volume fraction.The verification results of a working face project in Xutuan Coal Mine show that the prediction accuracy of this method can meet the engineering requirements,and it can provide a more reliable means for predicting the critical temperature of coal spontaneous combustion.

关 键 词：煤炭自燃 临界温度 指标气体 温度预测 

分 类 号：TD752.2[矿业工程—矿井通风与安全]