【作者】 侯庆虎；

【导师】 何启林；

【作者基本信息】 安徽理工大学 ， 安全技术及工程， 2007， 硕士

【摘要】 本文采用理论研究、实验分析和现场实测三方面相结合的综合研究方法,其中,在理论方面:本文研究了煤炭自燃机理及探讨了煤的低温氧化规律,综合国内外文献,分析了急倾斜煤层的开采特点,并就拾屯煤矿采用巷柱式开采方法进行分析,总结了拾屯煤矿的自然发火的分布规律;在实验分析方面:研究了煤在低温氧化时的各种特征量,如吸氧量、失重量、热流量,热焓等规律,研究了不同粒径煤样对煤的吸氧量与放热量等参数影响,建立了1171工作面采空区遗煤氧化过程的数学模型,并根据模型计算出1171工作面采空区遗煤自燃的实验最短发火期值;在现场实测方面:在拾屯煤矿1171工作面上下顺槽各预埋一趟束管与测温系统,实测采空区内遗煤氧化温度,释放的气体成分等参数,并对采空区遗煤自然发火情况进行了预测,得出了采空区“三带”的分布规律等相关数据。根据研究成果,提出了拾屯煤矿急倾斜巷柱式开采时预防采空区遗煤自燃的有效的措施,为拾屯煤矿急倾斜巷柱式开采工作面采空区预防煤炭自然发火提供可靠的理论和现实依据,确保了拾屯煤矿急倾斜巷柱式开采的1171工作面安全回采结束。更多还原

【Abstract】 Based on the three aspects of theory study, laboratory analysis and actual measurement, the paper studied the spontaneous combustion of coal in goaf. On the study of theory, the paper studied the mechanism of spontaneous combustion of coal and rules of coal oxidation in low temperature. Combining document of steep coal seam home and aborad, the paper analyzed the pillar mining method in steep coal seam and concluded the rules of firing of shitun coal mine; On the study of laboratory, the paper studied the absorbed oxygen, weight decreasing, heat flow and analyzed the different effect to absorbed oxygen and heat of different coal size. The paper built mathematic modle of lost coal oxidation of goaf in 1171 workface and calculated the shortest laboratory firing period in low temperature based on the mathematic modle. On the actual measurement, tubes and temperature measuring device were arranged along inlet and return drifts in 1171 workface to measure some parameter of gas composition and temperature of goaf after coal mining. The paper forecatsted spontaneous combustion of lost coal of goaf and acquired the rules of spontaneous combustion and the value of "three zones" of goaf.Based on the study results, the paper advanced effective measurement of spontaneous combustion in goaf before mining using pillar mining in shitun coal mine. Strong theory and actual reality were given to prevent lost coal in goaf from firing.These measurement and study results can ensure the safe mining of 1171 workface using pillar mining in shitun coal mine.更多还原