辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(5)：468-475,8.DOI:10.11956/j.issn.1008-0562.2017.05.004
压实防治煤堆自燃的适用性
Applicability of compaction for prevention of spontaneous combustion in coal stockpile
摘要
Abstract
To explore the applicability of compaction in coal stockpile,the two-dimension simulation model has been established based on COMSOLMultiphysics5.0.The maximum temperature of coal stockpile were studied under the conditions of different porosity(0.2-0.6) and different wind-velocity(0.1-11.5 m/s).Wind-velocity ranges of spontaneous combustion in different porosity stockpiles were identified.Compared the changes of maximum temperature and spontaneous combustion time before and after employed of compacting was compared,and the applicability of compaction in coal stockpile was analyzed.The results show that variation of the maximum temperature with wind-velocity is a double-exponential function.The smaller the porosity the wider the wind-velocity range.Variation of the smallest,the easiest and the largest wind-velocity of spontaneous combustion with porosity is a negative exponential function.Compaction providing the stockpile which original porosity is 0.6 with an effective protection,the maximum temperature of coal stockpile is rising and the spontaneous combustion time is shorten after the compaction is applied to the stockpile,which original porosity is 0.5,0.4 and 0.3 under the conditions of the wind-velocity is higher than 0.9 m/s,1 m/s,and 1.4 m/s,respectively.The results prove that coal stockpile compaction is not always a good solution for the prevention of coal spontaneous combustion,because the porosity of coal stockpile and surrounding wind-velocity is different.关键词
煤堆/自燃/孔隙率/风速范围/压实Key words
coal stockpile/spontaneous combustion/porosity/wind-velocity range/compaction分类
资源环境引用本文复制引用
曲国娜,王来贵,王建国,吴宪..压实防治煤堆自燃的适用性[J].辽宁工程技术大学学报（自然科学版）,2017,36(5):468-475,8.基金项目
国家自然科学基金煤炭联合基金重点项目(U1361211) （U1361211）
国家自然科学基金(51274110,51474121) （51274110,51474121）
辽宁省教育厅一般项目(2015221,2012122) （2015221,2012122）
辽宁工程技术大学生产技术问题创新研究基金项目(14-T-001) （14-T-001）
