大垂距双层采空区流场平衡控制技术
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摘要
为了解决大垂距火区下综放面均压通风防治上部火区有害气体下泄时将采空区瓦斯压入火区引发次生灾害的问题,采用理论研究的方法,对大垂距双层采空区流场平衡的控制条件进行分析,确定了双层采空区流场平衡的安全调节区间。在同忻煤矿西8101工作面进行应用,结果表明:当连接双层采空区的U型水柱计压差满足(350+0.016l,538+0.016l),l∈(85,1 600)时,工作面上隅角CO体积分数在回采期间始终保持在24×10-6以下,有效地保障工作面的安全回采。
In order to solve problem of the secondary disaster caused by the goaf gas pressed into the fire area when the method of pressure balancing ventilation is used to prevent the harmful gas of upper fire area discharge in the fully mechanized caving surface under large vertical distance fire area, by using the method of theoretical research, the control condition of flow field balance in double-layer goaf with large vertical distance is analyzed, and the safe adjustment interval of flow field balance in double-layer goaf is determined. It is applied in the western 8101 working face of Tongxin Coal Mine, and the results show that,when the gauge pressure difference of U-shaped water column connecting the double-layer goaf meets(350+0.016 l,538+0.016 l),l ∈(85,1 600), the volume fraction of CO at the corner of the working face is always kept below 24 ×10-6 during the mining period, which effectively guarantees the safe mining of the working face.
In order to solve problem of the secondary disaster caused by the goaf gas pressed into the fire area when the method of pressure balancing ventilation is used to prevent the harmful gas of upper fire area discharge in the fully mechanized caving surface under large vertical distance fire area, by using the method of theoretical research, the control condition of flow field balance in double-layer goaf with large vertical distance is analyzed, and the safe adjustment interval of flow field balance in double-layer goaf is determined. It is applied in the western 8101 working face of Tongxin Coal Mine, and the results show that,when the gauge pressure difference of U-shaped water column connecting the double-layer goaf meets(350+0.016 l,538+0.016 l),l ∈(85,1 600), the volume fraction of CO at the corner of the working face is always kept below 24 ×10-6 during the mining period, which effectively guarantees the safe mining of the working face.
引文
[1]牛立东,王常兴,王俊峰.废弃小煤窑采空区自燃火区治理关键技术的应用研究[J].中国煤炭,2010,36(1):91-93.
[2]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010:66-67.
[3]任杰,王方田.火区下近距离煤层安全开采合理错距研究[J].煤矿安全,2010,41(2):18-20.
[4]张国枢.通风安全学[M].徐州:中国矿业大学出版社.2011:269-271.
[5]王海生.周边火区条件下浅埋深煤层CO超限分析与治理[J].煤矿安全,2017,48(7):141-144.
[6]吕文陵.同忻煤矿特厚煤层综放工作面均压通风技术研究[J].煤炭与化工,2017,40(3):61-63.
[7]王志峰.均压通风技术在上湾煤矿的应用研究[J].煤炭科学技术,2016,44(10):53-57.
[8]陈涛,刘宝志.复杂火区下方易燃煤层高瓦斯综放面防火技术[J].煤矿安全,2016,47(8):76-78.
[9]张明亮,许景荣,贺帅.房采火区下均压通风防火技术[J].煤矿安全,2016,47(11):77-79.
[10]周令昌,孙清威,梁茵.采空区稳态流场及温度场的数学模型[J].现代矿业,2009,25(5):58-59.
[11]冀致森,张龙,乔双树.均压通风在小煤窑破坏区综放工作面的应用[J].山西焦煤科技,2008(3):43.
[12]张勋,王继仁,邓存宝,等.多层采空区流场局部动态平衡数学建模分析[J].安全与环境学报,2015,15(1):142-144.
[13]王刚,王锐,武猛猛.火区下近距离煤层开采有害气体入侵灾害防控技术[J].煤炭学报,2017,42(7):1765-1775.
[14]蒋东晖.均压灭火监测技术在六道湾煤矿的应用[J].西安科技大学学报,2004(4):409-411.
[15]周喆,郭首忠.净石沟煤矿易燃煤层不均衡生产综放工作面防火技术[J].矿业安全与环保,2013,40(4):95-97.
[2]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010:66-67.
[3]任杰,王方田.火区下近距离煤层安全开采合理错距研究[J].煤矿安全,2010,41(2):18-20.
[4]张国枢.通风安全学[M].徐州:中国矿业大学出版社.2011:269-271.
[5]王海生.周边火区条件下浅埋深煤层CO超限分析与治理[J].煤矿安全,2017,48(7):141-144.
[6]吕文陵.同忻煤矿特厚煤层综放工作面均压通风技术研究[J].煤炭与化工,2017,40(3):61-63.
[7]王志峰.均压通风技术在上湾煤矿的应用研究[J].煤炭科学技术,2016,44(10):53-57.
[8]陈涛,刘宝志.复杂火区下方易燃煤层高瓦斯综放面防火技术[J].煤矿安全,2016,47(8):76-78.
[9]张明亮,许景荣,贺帅.房采火区下均压通风防火技术[J].煤矿安全,2016,47(11):77-79.
[10]周令昌,孙清威,梁茵.采空区稳态流场及温度场的数学模型[J].现代矿业,2009,25(5):58-59.
[11]冀致森,张龙,乔双树.均压通风在小煤窑破坏区综放工作面的应用[J].山西焦煤科技,2008(3):43.
[12]张勋,王继仁,邓存宝,等.多层采空区流场局部动态平衡数学建模分析[J].安全与环境学报,2015,15(1):142-144.
[13]王刚,王锐,武猛猛.火区下近距离煤层开采有害气体入侵灾害防控技术[J].煤炭学报,2017,42(7):1765-1775.
[14]蒋东晖.均压灭火监测技术在六道湾煤矿的应用[J].西安科技大学学报,2004(4):409-411.
[15]周喆,郭首忠.净石沟煤矿易燃煤层不均衡生产综放工作面防火技术[J].矿业安全与环保,2013,40(4):95-97.