充填浆液的产气测试及对CO传感器监测的影响

doi:10.16265/j.cnki.issn1003-3033.2023.10.0232

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (10): 176-182.doi: 10.16265/j.cnki.issn1003-3033.2023.10.0232

充填浆液的产气测试及对CO传感器监测的影响

周昆¹^,²(), 孙希贤¹^,², 马豪悦¹^,², 刘施恩¹^,², 魏林海³, 仲晓星¹^,²^,^**()

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

收稿日期:2023-04-19 修回日期:2023-07-20 出版日期:2023-10-28
通讯作者:
**仲晓星(1981—),男,江苏南通人,博士,教授,主要从事煤火灾害防治、受限空间气体爆炸、应急救援技术与装备方面的研究。E-mail:zhxxcumt@cumt.edu.cn。
作者简介:
周昆 (1993—),男,甘肃天水人,博士,讲师,主要从事气体光谱检测、颗粒物激光偏振检测及微纳结构的光学特性及应用等方面的研究。E-mail:zhoukun0209@163.com。
魏林海工程师
基金资助:
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)

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

ZHOU Kun¹^,²(), SUN Xixian¹^,², MA Haoyue¹^,², LIU Shien¹^,², WEI Linhai³, ZHONG Xiaoxing¹^,²^,^**()

¹ School of Safety Engineering, China University of Mining and Technology, Xuzhou Jiangsu 221116, China
² Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology,Xuzhou Jiangsu 221116, China
³ North Xulou Coal Mine, Shandong Fengyuan Yuanhang Coal Industry Co., Ltd., Zaozhuang Shandong 277300, China

Received:2023-04-19 Revised:2023-07-20 Published:2023-10-28

摘要/Abstract

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O₂和CO₂,且会产生H₂、CO和CH₄;其中O₂和CO的体积分数变化与煤矸石氧化有关,CH₄的体积分数变化与煤矸石中甲烷解吸有关,CaO和CO₂的反应会导致CO₂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H₂,且H₂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。

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

Abstract:

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 O₂ and CO₂ are consumed, and H₂, CO and CH₄ are produced in the process of physicochemical reaction. Among them, the concentration changes of O₂ and CO is related to the oxidation of coal gangue, the concentration change of CH₄ is related to the desorption of methane in coal gangue, the reaction of CaO and CO₂ will lead to the reduction of CO₂ concentration, and the reaction of Al powder in fly ash in an alkaline environment will produce H₂, and H₂ 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.

Key words: filling material, gas production characteristics, electrochemical CO sensor, false alarm, interference factor

周昆, 孙希贤, 马豪悦, 刘施恩, 魏林海, 仲晓星. 充填浆液的产气测试及对CO传感器监测的影响[J]. 中国安全科学学报, 2023, 33(10): 176-182.

ZHOU Kun, SUN Xixian, MA Haoyue, LIU Shien, WEI Linhai, ZHONG Xiaoxing. Gas production tests of filling slurry and its influence on CO sensor monitoring[J]. China Safety Science Journal, 2023, 33(10): 176-182.

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成分	煤矸石	粉煤灰	水泥
SiO₂	44.41	43.81	25.47
Al₂O₃	22.13	41.66	10.19
SO₃	16.23	2.10	3.85
Fe₂O₃	8.91	3.54	3.33
CaO	3.84	4.93	51.26
K₂O	1.73	0.57	0.89
MgO	1.21	0.84	3.76
TiO₂	0.80	1.43	0.39
其他	0.74	1.12	0.86

名称	煤矸石	粉煤灰	水泥	矿井水
浆液1	√	√	—	√
浆液2	√	—	√	√
浆液3	—	√	√	√
浆液4	√	√	√	√

测量范围/ 10^-6	气体体积分数/10^-6	基本误差
测量范围/ 10^-6	气体体积分数/10^-6	绝对误差/10^-6	相对误差/%
[0,1 000]	[0,100]	±4	—
	(100,500]	—	±5
	(500,1 000]	—	±6

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

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气体种类	φ/10^-6		C/10^-6					Q	是否报警
空气	—		0	0	0	0	0	0.0	否
CO	20		21	22	20	20	21	—	否
CO	100		102	101	101	102	100	—	是
CH₄	50		0	0	0	0	0	0.0	否
CH₄	5 000		0	0	0	0	0	0.0	否
H₂	20		10	8	9	9	8	0.4~0.5	否
H₂	100		46	44	45	42	45	0.42~0.46	是
CO、H₂	φ(CO) =10	φ(H₂) =20	19	21	20	19	21	0.45~0.5	否
CO、H₂	φ(CO) =20	φ(H₂) =20	29	31	30	29	30	0.4~0.45	是

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