煤层自然发火标志气体及临界值确定
Ascertainment of Coal Spontaneous Combustion Mark Gas and Critical Value
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摘要: 以神东矿区5个不同煤层为研究对象,利用程序升温实验优选出神东矿区煤层自然发火标志气体,得出了不同温度条件下CO产生速率,通过现场测试工作面回风隅角及采空区CO和O2体积分数,划分采空区散热带和氧化带的宽度,建立回风隅角CO指标临界值的计算模型,最终给出回风隅角CO指标临界值。结果表明:神东矿区煤层自然发火标志气体为CO、C2H4、C2H2,可分别作为煤自然发火初期、加速阶段和激烈氧化阶段的标志气体;正常开采条件下,回风隅角CO指标临界值为90×10-6,当上升至350×10-6时,采空区遗煤已达临界温度(60~70 ℃)。Abstract: Based on five seam coal samples from Shendong Mining Area as the study objects, the spontaneous combustion mark gases were optimized using the temperature programming experiment. Meanwhile, the CO gas production rate under different temperature conditions was obtained. The CO and O2 volume fraction of return air corner and goaf was tested at the field, and the width of heat dissipation zone and oxidation zone was also divided. The computational model of CO index critical value in return air corner was established. The study results showed that the mark gas of coal spontaneous combustion in Shendong Mining Area was CO, C2H4 and C2H2 which can be used as the sign for the coal spontaneous combustion initial stage, the acceleration stage and the intense oxidation stage. The critical value of the CO index in return corner was 90×10-6. When the CO volume fraction reached 350×10-6, the gob coal had reached the critical temperature which was 60 ℃ to 70 ℃.
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Keywords:
- spontaneous combustion /
- mark gas /
- critical value /
- CO gas production rate /
- critical temperature
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[1] 国家安全生产监督管理总局,国家煤矿安全监察局.煤矿安全规程[M].北京:煤炭工业出版社,2016. [2] 梁运涛.煤炭自然发火预测预报的气体指标法[J].煤炭科学技术,2008,36(6):5-8. [3] 罗海珠,梁运涛.煤自然发火预测预报技术的现状与展望[J].中国安全科学学报,2003,13(3):76-78. [4] 秦红星,戴广龙,张树川,等.基于煤低温氧化试验下的标志气体优选及应用[J].煤炭科学技术,2015,43(6):65-70. [5] 朱令起,周心权,谢建国,等.自然发火标志气体实验分析及优化选择[J].采矿与安全工程学报,2008,25(4):440-443. [6] 余明高,周世轩,褚廷湘,等.立体瓦斯抽采条件下煤自燃预测预报标志气体的优化选择[J].河南理工大学学报(自然科学版),2012,31(1):1-5. [7] 邬剑明,彭举,吴玉国.平朔矿区煤自然发火指标气体选择的试验研究[J].煤炭科学技术,2012,40(2):67. [8] 李耀明.预报煤炭自燃的CO指标气体临界值研究[J].安徽理工大学学报(自然科学版),2011,31(3):57-61. [9] 齐庆杰,祁云,周新华.供风量对采空区自燃动态影响及防灭火技术[J].中国安全科学学报,2019,29(4):120-126. [10] 翟小伟,马灵军,邓军.工作面上隅角CO浓度预测模型的研究与应用[J].煤炭科学技术,2011,39(11):59-62. -
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