充填浆液的产气测试及对CO传感器监测的影响  

Gas production tests of filling slurry and its influence on CO sensor monitoring

作　　者：周昆 孙希贤[1,2] 马豪悦 刘施恩 魏林海 仲晓星 ZHOU Kun;SUN Xixian;MA Haoyue;LIU Shien;WEI Linhai;ZHONG Xiaoxing(School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Key Laboratory of Gas and Fire Control for Coal Mines,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;North Xulou Coal Mine,Shandong Fengyuan Yuanhang Coal Industry Co.,Ltd.,Zaozhuang Shandong 277300,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [3]山东丰源远航煤业有限公司北徐楼煤矿,山东枣庄277300

出　　处：《中国安全科学学报》2023年第10期176-182,共7页China Safety Science Journal

基　　金：国家自然科学基金资助(52204258);新疆维吾尔自治区重点研发任务专项项目(2022B03003-3);江苏省研究生科研与实践创新计划项目(2023WLJCRCZL190);中国矿业大学国家级大学生创新创业训练计划(202310290015Z)。

摘　　要：针对采空区充填浆液因发生物化反应后产生干扰气体,引起矿用电化学CO传感器误报警的问题,基于浆液的氧化周期、产气特性、反应后成分的X射线衍射(XRD)及充填产生气体对矿用电化学CO传感器的交叉干扰等测试,研究煤矸石、粉煤灰、普通硅酸盐水泥和矿井水以65.5∶4.5∶10∶20比例配置成的充填浆液的产气特性,探究充填产生气体对矿用电化学CO传感器的影响特征。结果表明:采空区充填浆液在物化反应过程中会消耗O 2和CO 2,且会产生H 2、CO和CH 4;其中O 2和CO的体积分数变化与煤矸石氧化有关,CH 4的体积分数变化与煤矸石中甲烷解吸有关,CaO和CO 2的反应会导致CO 2体积分数的降低,粉煤灰中的铝粉在碱性环境中反应会产生H 2,且H 2是造成矿用电化学CO传感器误报警的主要因素,并对矿用电化学CO传感器检测结果呈正交叉干扰。Aiming at the problem of false alarm of electrochemical CO sensor in coal mines due to interference gas produced by physicochemical reaction of filling slurry in goaf,based on the oxidation period,gas production characteristics,X-ray diffraction(XRD)of the composition after reaction and the cross interference of filling gas to electrochemical CO sensor in coal mines,etc.,the gas production characteristics of filling grout composed of coal gangue,fly ash,Portland cement and mine water at the ratio of 65.5∶4.5∶10∶20 were studied,and the influence characteristics of filling gas on electrochemical CO sensor for mining were explored.The results show that O 2 and CO 2 are consumed,and H 2,CO and CH 4 are produced in the process of physicochemical reaction.Among them,the concentration changes of O 2 and CO is related to the oxidation of coal gangue,the concentration change of CH 4 is related to the desorption of methane in coal gangue,the reaction of CaO and CO 2 will lead to the reduction of CO 2 concentration,and the reaction of Al powder in fly ash in an alkaline environment will produce H 2,and H 2 is the main factor causing the false alarm of electrochemical CO sensor in coal mines.It also has positive cross interference to the detection results of electrochemical CO sensors used in coal mines.

关 键 词：充填浆液 产气特性 电化学CO传感器 误报警 干扰因子 

分 类 号：X936[环境科学与工程—安全科学]