中文摘要：

为探讨升温煤体受限空间气体的变化规律,设计加工升温煤体引爆瓦斯试验平台,针对不同初始CH4体积分数开展受限空间煤体升温试验。利用Matlab计算试验数据,绘制O2,N2,CO,CH4,C2H4,C2H2的体积分数变化规律曲线。基于可燃性气体爆炸极限理论和计算公式,计算可燃性气体体积分数与混合气的爆炸上下限值,并绘制其关系图。结果显示,当温度为190~400℃时,受限空间气体将失去爆炸性。分析现场煤自燃引爆瓦斯的条件和形式,提出防治煤自燃引爆瓦斯的重点是防止煤柱、断层和高冒煤自燃升温到更高温度,尤其是要防止该区域提前氧化升温,同时要保持工作面风流稳定。

英文摘要：

To explore change law of gases in confined and heating coal space, experiments were carried out by using an experimental platform for heating coal detonating gas. Coal heating experiments were done under different initial CH4 volume fractions. Experimental datum was calculated by Matlab. Change laws of O2, N2, CO, CH4, C2H4 and C2H2 were drawn and analyzed. Based on explosion limitstheory and calculation formula of combustible gas, combustible gases＇ volume fractions and upper and lower explosive limits of mixed gases were calculated. The results show that the gases in confined space would lose explosibility when it is at a temperature of 190-400 ℃, and that the key to preventing gases from being detonated by coal spontaneous combustion is both keeping coal spontaneous combustion of coal pillar, fault and high caving from reaching a higher temperature and maintaining a stable airflow rate in face.