【摘要】 为研究分析不同位置下注CO₂、不同注CO₂流量及不同温度CO₂对防灭火的影响，选取阳煤五矿8406工作面为研究对象，在数值模拟基础上，采用Design Expert软件进行BoxBehnken试验设计，构建了采空区氧化带最大宽度在三因素、三水平条件下的二次回归响应曲面模型，并对不同条件下采空区氧化带最大宽度进行了预测与分析。结果表明：氧化带最大宽度随注CO₂流量增加而降低，随CO₂注入温度增加而增加；二次回归方程显著性判断值P<0.000 1，极显著，失拟项为0.253 7，不显著；当注CO₂位置在20～40 m，注CO₂流量在720～1 080 m³/min，注CO₂温度在278～288 K之间，对氧化带最大宽度一次项重要度排序为注CO₂流量>注CO₂温度>注CO₂位置；二次项重要度排序为注CO₂位置和注CO₂流量>注CO₂位置和注CO₂温度>注CO₂流量和注CO₂温度，且注CO₂位置、注CO₂流量和注CO₂温度间均无交互作用；最优参数设置为：注CO₂位置为30 m，注CO₂流量为900 m³/min,注CO₂温度为283 K。更多还原

【Abstract】 In order to study and analyze the impact of CO₂injection at different locations,different CO₂injection flow rates,and different temperatures on CO₂fire prevention,the 8406 working face of Yangmei No.5 coal mine was selected as the research object.Based on the numerical simulation research,the Design Expert software was used for the Box-Behnken test design.A quadratic regression response surface model of the maximum width of oxidation zone in goaf under three factors and three levels was constructed.The maximum width of oxidation zone in goaf was predicted and analyzed.The results show that the maximum width of the oxidation zone decreases with the increase of CO₂injection flow rate,and increases with the increase of CO₂injection temperature;the P value of the quadratic regression equation is less than 0.000 1,which is extremely significant,and the missing fitting term is 0.253 7,which is not significant.The regression equation has statistical significance;when the position of carbon dioxide injection is 20-40 m,the flow of carbon dioxide injection is 720-1 080 m³/min,the temperature of carbon dioxide injection is between 278-288 K,and the order of the importance of the maximum width of the oxidation zone is CO₂injection flow>CO₂injection temperature>CO₂injection position;the order of importance of the secondary terms is injection of carbon dioxide and position of injecting carbon dioxide>injection of carbon dioxide and position of injecting carbon dioxide temperature>injection of carbon dioxide and flow of carbon dioxide,and there is no interaction between the position of carbon dioxide injection,the flow of carbon dioxide injection,and the temperature of carbon dioxide injection.The optimal parameters are set as follows:CO₂injection position is 30 m,CO₂injection flow is 900 m³·min^-1,and CO₂injection temperature is 283 K.更多还原