许疃煤矿煤炭自燃指标气体优选与应用  

Optimization and application of coal spontaneous combustion index gas in Xutuan Coal Mine

作　　者：骆大勇[1] 刘振[2] LUO Dayong;LIU Zhen(Chongqing Vocational Institute of Engineering,Chongqing 402260,China;Xutuan Coal Mine of Huaibei Mining Group,Bozhou 233501,China)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]淮北矿业集团许疃煤矿,安徽亳州233501

出　　处：《矿业安全与环保》2021年第5期69-74,共6页Mining Safety & Environmental Protection

基　　金：重庆市教育委员会科学技术研究项目(KJQN201803401)。

摘　　要：为了有效预防许疃煤矿3_(2)38工作面采空区遗煤自燃,通过采集该工作面煤样进行煤自燃倾向性测试和低温氧化试验分析,优选出预测煤自燃指标气体:煤温在20~100℃时,以CO作为指标气体;煤温在100~150℃时,以C_(2)H_(6)作为指标气体;煤温在150℃以上时,以C_(3)H_(8)作为指标气体,并以链烷比作为辅助指标参数。根据测试结果,采用插值拟合方法,得到各指标气体体积分数与温度之间的函数关系式。基于所建立的拟合函数关系式,通过检测煤体温度,可以计算出CO、C_(2)H_(6)及C_(3)H_(8)的体积分数,用于推测采空区自燃状况。现场应用结果表明,采空区遗煤自燃预测效果良好。In order to effectively prevent the spontaneous combustion of residual coal in 3_(2)38 working face of Xutuan Coal Mine,the coal spontaneous combustion tendency test and low temperature oxidation test analysis are carried out by collecting the coal samples from the working face,the index gas for predicting coal spontaneous combustion is optimized;when the coal temperature is between 20℃and 100℃,CO is used as the indicator gas;when the coal temperature is between 100℃and 150℃,C_(2)H_(6)is used as the indicator gas;when the coal temperature is above 150℃,C_(3)H_(8)is used as the indicator gas,and the chain to alkane ratio is used as the auxiliary indicator parameter.According to the test results,the function formula between the gas volume fraction and temperature is obtained by interpolation fitting method.Based on the established fitting function,the volume fractions of CO,C_(2)H_(6)and C_(3)H_(8)can be calculated by detecting the temperature of coal,which can be used to predict the spontaneous combustion status of goaf.The result of field application shows that the prediction effect of residual coal spontaneous combustion in goaf is good.

关 键 词：采空区 煤炭自燃 指标气体 火灾系数 链烷比 自燃倾向性 

分 类 号：TD752.2[矿业工程—矿井通风与安全]