顶板巷瓦斯抽采量对漏风流场的扰动效应研究
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摘要
为深入研究顶板巷瓦斯抽采量对漏风流场的扰动效应,以河南义马耿村煤矿13190工作面实际情况为例,通过数值模拟与实测相结合的方法分析瓦斯抽采诱导漏风规律。首先,对现场实际工况下的漏风流场进行数值模拟及分析;其次,根据示踪气体实测结果,验证了模拟的有效性;最后,分析不同抽采量下工作面的漏风分布情况。研究结果表明:漏风风流进入采空区后呈现立体迁移和"一源两汇"的分布特征;随着顶板巷抽采量的增加,工作面向采空区的漏风区域逐渐向回风巷方向扩展,最低风量点位置向回风巷方向移动,采空区气体向工作面的涌出效应逐渐减弱,工作面向采空区的漏风量逐渐加大。
In order to master the disturbance effects of the gas drainage volume of upper tunnel on air leakage field,the actual conditions of 13190 working face in Yima Gengcun Coal Mine was taken as an example,the rules of the air leakage were analyzed by means of numerical simulation and in-suit measurement. Firstly,the leakage flow field was solved by numerical simulation under the condition of upper tunnel gas drainage. Secondly,according to the tracer gas measured,the results of the simulation and the measured results were analyzed,and the reliability of the simulation was verified. Finally,the leakage flow distributions under different drainage volumes were analyzed. The results show that the air leakage flow into the gob is characterized by both three-dimensional migration and a source and two sink.With the gradual increasing of upper tunnel drainage volume,the air leakage area of working face and the minimum air volume point gradually move to the return air lane direction,the effect of goaf gas emission on the working face gradually weakens,and the amount of air leakage to goaf increases gradually.
In order to master the disturbance effects of the gas drainage volume of upper tunnel on air leakage field,the actual conditions of 13190 working face in Yima Gengcun Coal Mine was taken as an example,the rules of the air leakage were analyzed by means of numerical simulation and in-suit measurement. Firstly,the leakage flow field was solved by numerical simulation under the condition of upper tunnel gas drainage. Secondly,according to the tracer gas measured,the results of the simulation and the measured results were analyzed,and the reliability of the simulation was verified. Finally,the leakage flow distributions under different drainage volumes were analyzed. The results show that the air leakage flow into the gob is characterized by both three-dimensional migration and a source and two sink.With the gradual increasing of upper tunnel drainage volume,the air leakage area of working face and the minimum air volume point gradually move to the return air lane direction,the effect of goaf gas emission on the working face gradually weakens,and the amount of air leakage to goaf increases gradually.
引文
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[13]褚廷湘,姜德义,余明高,等.顶板巷瓦斯抽采诱导煤自燃机制及安全抽采量研究[J].煤炭学报,2016,41(7):1 701-1 710.CHU Tingxiang,JIANG Deyi,YU Minggao,et al.Study on mechanism of inducing coal spontaneous combustion and safe gas extraction volume under roof tunnel gas extraction[J].Journal of China Coal Society,2016,41(7):1 701-1 710.
[14]杨胜强,徐全,黄金,等.采空区自燃“三带”微循环理论及漏风流场数值模拟[J].中国矿业大学学报,2009,38(11):769-773.YANG Shengqiang,XU Quan,HUANG Jin,et al.The“three zones”microcirculation theory of goaf spontaneous combustion and numerical simulation of the air leakage flow field[J].Journal of China University of Mining&Technology,2009,38(11):769-773.
[15]张辛亥,席光,徐精彩,等.基于流场模拟的综放面自然危险区域划分及预测[J].北京科技大学学报,2005,27(6):641-644.ZHANG Xinhai,XI Guang,XU Jingcai,et al.Partition of spontaneous combustion dangerous zone and prediction of spontaneous combustion based on numerically modeling the flow field at fully mechanized caving face[J].Journal of University of Science and Technology Beijing,2005,27(6):641-644.
[2]游浩,李宝玉,张福喜.阳泉矿区综放面瓦斯综合治理技术[M].北京:煤炭工业出版社,2008:16-18.
[3]褚廷湘,余明高,姜德义,等.“U+I”型采煤工作面采空区瓦斯抽采量理论研究[J].中国矿业大学学报,2015,44(4):1 009-1 016CHU Tingxiang,YU Minggao,JIANG Deyi,et al.Theory of gas extraction amount in the gob of“U+I”type panel[J].Journal of China University of Mining&Technology,2015,44(4):1 009-1 016.
[4]李宗翔,吴强.采空区瓦斯涌出与自燃耦合基础研究[J].中国矿业大学学报,2008,37(1):38-42.LI Zongxiang,WU Qiang.Numerical simulation of coupling mechanism of coal spontaneous combustion and gas effusion in goaf[J].Journal of China University of Mining&Technology,2008,37(1):38-42.
[5]周爱桃,王凯,臧杰,等.易自燃采空区瓦斯与火灾共治数值模拟[J].中国安全科学学报,2010,20(8):49-53.ZHOU Aitao,WANG Kai,ZANG Jie,et al.Numerical simulation of gas andre control in spontaneous combustion gob[J].China Safety Science Journal,2010,20(8):49-53.
[6]罗新荣,唐冠楚,李亚伟,等.CFD模型下采空区瓦斯抽采与注氮防灭火设计[J].中国安全科学学报,2016,26(6):69-74.LUO Xinrong,TANG Guanchu,LI Yanwei,et al.CFD model based design of both gas drainage and nitrogen injection against fire in goaf.[J].China Safety Science Journal,2016,26(6):69-74.
[7]夏同强.瓦斯与煤自燃多场耦合致灾机理研究[D].徐州:中国矿业大学,2015.XIA Tongqiang.Multi-physics coupling mechanism of co-existence hazards for coal spontaneous combustion and gas[D].Xuzhou:China University of Mining and Technology,2015.
[8]周福宝.瓦斯与煤自燃共存研究(I):致灾机理[J].煤炭学报,2012,37(5):843-849.ZHOU Fubao.Study on the coexistence of gas and coal spontaneous combustion(I)[J].Journal of China Coal Society,2012,37(5):843-849.
[9]张玫润,杨胜强,程健维,等.一面四巷高位瓦斯抽采及浮煤自燃耦合研究[J].中国矿业大学学报,2013,42(2):513-518.ZHANG Meirun,YANG Shengqiang,CHENG Jianwei,et al.Study on coupling of spontaneous combustion of surface coal with gas drainage on a coal face with"four-gate road"and overlying drain-age tunnel[J].Journal of China University of Mining&Technology,2013,42(2):513-518.
[10]杨胜强,秦毅,孙家伟,等.高瓦斯易自燃煤层瓦斯与自燃复合致灾机理研究[J].煤炭学报,2014,39(5):1 094-1 101.YANG Shengqiang,QIN Yi,SUN Jiawei,et al.Research on coupling hazard mechanism of mine gas and coal fire for a gassy and high spontaneous combustion propensity coal seam[J].Journal of China Coal Society,2014,39(5):1 094-1 101.
[11]杨胜强,张玫润.瓦斯立体抽采系统中采空区漏风实测及模拟研究[J].煤炭科学技术,2013,41(3):62-65.YANG Shengqiang,ZHANG Meirun.Study on goaf air leakage measurement and modeling of 3D gas drainage system[J].Coal Science and Technology,2013,41(3):62-65.
[12]宋万新.含瓦斯风流对煤自燃氧化特性影响的理论及应用研究[D].徐州:中国矿业大学,2012.SONG Wanxin.Theoretical and applied studies on effect of methane-bearing air on spontaneous combustion characteristics[D].Xuzhou:China University of Mining and Technology,2012.
[13]褚廷湘,姜德义,余明高,等.顶板巷瓦斯抽采诱导煤自燃机制及安全抽采量研究[J].煤炭学报,2016,41(7):1 701-1 710.CHU Tingxiang,JIANG Deyi,YU Minggao,et al.Study on mechanism of inducing coal spontaneous combustion and safe gas extraction volume under roof tunnel gas extraction[J].Journal of China Coal Society,2016,41(7):1 701-1 710.
[14]杨胜强,徐全,黄金,等.采空区自燃“三带”微循环理论及漏风流场数值模拟[J].中国矿业大学学报,2009,38(11):769-773.YANG Shengqiang,XU Quan,HUANG Jin,et al.The“three zones”microcirculation theory of goaf spontaneous combustion and numerical simulation of the air leakage flow field[J].Journal of China University of Mining&Technology,2009,38(11):769-773.
[15]张辛亥,席光,徐精彩,等.基于流场模拟的综放面自然危险区域划分及预测[J].北京科技大学学报,2005,27(6):641-644.ZHANG Xinhai,XI Guang,XU Jingcai,et al.Partition of spontaneous combustion dangerous zone and prediction of spontaneous combustion based on numerically modeling the flow field at fully mechanized caving face[J].Journal of University of Science and Technology Beijing,2005,27(6):641-644.