CAJ | 학술논문

煤在自燃的不同阶段会释放出不同的气体，这些气体的成分及浓度能反映煤炭的自燃程度。为准确地对古书院矿自然发火情况进行预测预报，以古书院矿15＃煤为研究对象，通过程序升温实验、利用气相色谱仪，研究了15＃煤的自燃氧化特性，以及自燃升温过程中产生气体的变化规律，分析了φ（C3 H8）／φ（C2 H6）、φ（C2 H4）／φ（C2 H6）等链烷比和烯烷比比值曲线。结果表明：古矿15＃煤的自燃临界温度约为80℃，干裂临界温度约为140℃；15＃煤在常温下就能产生CO ，且产生量与温度呈指数关系；C3 H8出现的温度为60℃，在120～240℃时气体产生量呈现单调递增趋势。结合指标气体优选原则，确定古矿15＃煤层自燃指标气体的选择应以CO与C3 H8为主，以C2 H4、φ（CO ）／φ（CO2）、φ（C3 H8）／φ（C2 H6）为辅。该研究结果对提高古矿煤炭早期自燃预测预报的准确度以及防治矿井火灾具有重要的指导价值。
매재자연적불동계단회석방출불동적기체，저사기체적성분급농도능반영매탄적자연정도。위준학지대고서원광자연발화정황진행예측예보，이고서원광15＃매위연구대상，통과정서승온실험、이용기상색보의，연구료15＃매적자연양화특성，이급자연승온과정중산생기체적변화규률，분석료φ（C3 H8）／φ（C2 H6）、φ（C2 H4）／φ（C2 H6）등련완비화희완비비치곡선。결과표명：고광15＃매적자연림계온도약위80℃，간렬림계온도약위140℃；15＃매재상온하취능산생CO ，차산생량여온도정지수관계；C3 H8출현적온도위60℃，재120～240℃시기체산생량정현단조체증추세。결합지표기체우선원칙，학정고광15＃매층자연지표기체적선택응이CO여C3 H8위주，이C2 H4、φ（CO ）／φ（CO2）、φ（C3 H8）／φ（C2 H6）위보。해연구결과대제고고광매탄조기자연예측예보적준학도이급방치광정화재구유중요적지도개치。
Various gases will be released in the different process of coal spontaneous combustion .The appearance of these gases and the release quantity can accurately reflect the degree of spontaneous combustion .In order to predict the spontaneous combustion in Gu Shu‐yuan Mine exactly ,using the programmed temperature rising test and the gas chromatography ,the oxidation characteristic of the coal spontaneous combustion in 15 coal seam and the changing rule of releasing gases during the coal oxidized spontaneous combustion process were studied .The curve rules of φ (C2 H4 )/φ (C2 H6 ) ,φ (C3 H8 )/φ(C2 H6 ) and other alkenes/alkenes ratio were analyzed .The results show that the spontaneous critical temperature of 15 coal seam is about 80℃ ,and dry cracking critical temperature is about 140℃ ;CO can be released at normal temperature .The production value of CO shows an exponential relationship with temperature ;The temperature of C3 H8 appeared is about 60℃ ,the quantity of C3 H8 has a monotone increasing at 120℃ ~ 240℃ .Combining with indicator gas optimization principle ,the spontaneous combustion index gases of Gu Shu‐yuan Mine 15 coal seam are CO and C3 H8 .C2 H4 ,φ (CO)/φ (CO2 ) andφ(C3 H8 )/φ (C2 H6 ) can be selected as auxiliary indicators for predicting coal spontaneous combustion .The results are meaningful in improving the accuracy of coal spontaneous combustion prediction and prevention of mine fire in Gu Shu‐yuan Mine .