CAJ | 학술논문

为了更好的使用低温CO2预防采空区煤自燃事故，利用FLUENT数值模拟的方法，结合宣东二号煤矿Ⅲ3煤层209工作面的实际条件，构建了考虑采空区不同压实程度的低温CO2注入采空区惰化降温耦合作用数值计算模型；分别研究了CO2注入量为540m3／h和720m3／h时，不同注入位置对采空区氧化带内最高温度点和氧化带宽度变化的影响。研究表明，合理的低温CO2注入位置为距工作面支架尾梁20～30m。
위료경호적사용저온CO2예방채공구매자연사고，이용FLUENT수치모의적방법，결합선동이호매광Ⅲ3매층209공작면적실제조건，구건료고필채공구불동압실정도적저온CO2주입채공구타화강온우합작용수치계산모형；분별연구료CO2주입량위540m3／h화720m3／h시，불동주입위치대채공구양화대내최고온도점화양화대관도변화적영향。연구표명，합리적저온CO2주입위치위거공작면지가미량20～30m。
In order to make better use of low temperature CO2 in the prevention of coal spontaneous combustion ac-cidents in gob, by using numerical simulation method of FLUENT, and combined with the actual conditions in 209 working face of coal seam III3 in Xuandong No.2 coal mine, a numerical calculation model of inerting cooling cou-pling effect by injection of low temperature CO2 into gob considering the different compaction degree of gob was con-structed.The effects of different injection positions on the maximum temperature point in oxidized zone of gob and the variation of oxidized zone width were studied with injection rate of CO2 as 540 m3/h and 720 m3/h re-spective-ly.It showed that the reasonable injection position of low temperature CO2 is 20~30m away from the sup-port tail beam of work face.