煤巷掘进迎头煤与瓦斯突出的突变机制分析
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摘要
将巷道简化为圆形,并将掘进迎头视为圆形直立层裂体建立力学模型;导出了层裂体总势能函数的表达式,建立了圆形层裂体的折叠突变模型,得出了瓦斯突出起动的突变条件,并用有限元方法进行了数值模拟。研究表明,层裂体两侧压力差超过临界值将导致瓦斯突出,这对有效防止瓦斯突出具有重要指导意义。
The mechanical model of circular layer-crack structure of coal heading face is established with the simplification that the laneway is circular.Based on the expression of total potential energy function,a fold catastrophe model of circular layer-crack structure is established;the sudden change condition of gas outburst is given.The research results indicate that the coal and gas outburst will happen if pressure drop of the two sides of plate is larger than critical value.This research result is useful for gas outburst prevention.
The mechanical model of circular layer-crack structure of coal heading face is established with the simplification that the laneway is circular.Based on the expression of total potential energy function,a fold catastrophe model of circular layer-crack structure is established;the sudden change condition of gas outburst is given.The research results indicate that the coal and gas outburst will happen if pressure drop of the two sides of plate is larger than critical value.This research result is useful for gas outburst prevention.
引文
[1]吴中立.矿井通风与安全[M].徐州:中国矿业大学出版社,1995.
[2]凌复华.突变理论及其应用[M].上海:上海交通大学出版社,1988.
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[4]潘岳,刘英,顾善发.矿井断层冲击地压的折叠突变模型[J].岩石力学与工程学报,2001,20(1):43-48.PAN Yue,LIU Ying,GU Shan-fa.Fold catastrophe model of mining fault rock burst[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(1):43-48.
[5]秦四清.斜坡失稳的突变模型与混沌机制[J].岩石力学与工程学报,2000,19(4):486-492.QIN Si-qing.Nonlinear catastrophe model of slope instability and chaotic dynamics mechanism of slope ecolvtion process[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(4):486-492.
[6]王连国,宋扬,缪协兴.基于尖点突变模型的煤层底板突水预测研究[J].岩石力学与工程学报,2003,22(4):573-577.WANG Lan-guo,SONG Yang,MIAO Xie-xing.Study on prediction of water-inrush from coal floor based on cusp catastrophic model[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(4):573-577.
[7]刘保县,鲜学福,姜德义.煤与瓦斯延期突出机理及其预测预报的研究[J].岩石力学与工程学报,2002,21(5):647-650.LIU Bao-xian,XIAN Xue-fu,JIANG De-yi.Research on the mechanism and prediction of delay outburst of coal and gas[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(5):647-650.
[8]蒋承林,俞启香.煤与瓦斯突出的球壳失稳机理及防治技术[M].徐州:中国矿业大学出版社,1998.
[9]徐芝纶.弹性力学[M].北京:人民教育出版社,1982.
[10]周辉,翟德元,王泳嘉.薄隔水层井筒底板突水的突变模型[J].中国安全科学学报,1999,9(3):44-48.ZHOU Hui,ZHAI De-yuan,WANG Yong-jia.The sudden change model of water outburst at vertical shaft floor of thin water-resisting layer[J].Chinese Safety Science Journal,1999,9(3):44-48.
[11]梁冰,章梦涛,潘一山,等.煤和瓦斯突出的固流耦合失稳理论[J].煤炭学报,1995,20(5):492-496.LIANG Bing,ZHANG Meng-tao,PAN Yi-shan,et al.Theory of instability of flow fixation coupling for coal and gas outburst[J].Journal of China Coal Society,1995,20(5):492-496.
[2]凌复华.突变理论及其应用[M].上海:上海交通大学出版社,1988.
[3]殷有泉,郑顾团.断层地震的尖角型突变模型[J].地球物理学报,1988,31(6):657-663.YIN You-quan,ZHENG Gu-tuan.A cusp type catastrophic model of fault earthquake[J].Chinese Journal of Geophysics,1988,31(6):657-663.
[4]潘岳,刘英,顾善发.矿井断层冲击地压的折叠突变模型[J].岩石力学与工程学报,2001,20(1):43-48.PAN Yue,LIU Ying,GU Shan-fa.Fold catastrophe model of mining fault rock burst[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(1):43-48.
[5]秦四清.斜坡失稳的突变模型与混沌机制[J].岩石力学与工程学报,2000,19(4):486-492.QIN Si-qing.Nonlinear catastrophe model of slope instability and chaotic dynamics mechanism of slope ecolvtion process[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(4):486-492.
[6]王连国,宋扬,缪协兴.基于尖点突变模型的煤层底板突水预测研究[J].岩石力学与工程学报,2003,22(4):573-577.WANG Lan-guo,SONG Yang,MIAO Xie-xing.Study on prediction of water-inrush from coal floor based on cusp catastrophic model[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(4):573-577.
[7]刘保县,鲜学福,姜德义.煤与瓦斯延期突出机理及其预测预报的研究[J].岩石力学与工程学报,2002,21(5):647-650.LIU Bao-xian,XIAN Xue-fu,JIANG De-yi.Research on the mechanism and prediction of delay outburst of coal and gas[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(5):647-650.
[8]蒋承林,俞启香.煤与瓦斯突出的球壳失稳机理及防治技术[M].徐州:中国矿业大学出版社,1998.
[9]徐芝纶.弹性力学[M].北京:人民教育出版社,1982.
[10]周辉,翟德元,王泳嘉.薄隔水层井筒底板突水的突变模型[J].中国安全科学学报,1999,9(3):44-48.ZHOU Hui,ZHAI De-yuan,WANG Yong-jia.The sudden change model of water outburst at vertical shaft floor of thin water-resisting layer[J].Chinese Safety Science Journal,1999,9(3):44-48.
[11]梁冰,章梦涛,潘一山,等.煤和瓦斯突出的固流耦合失稳理论[J].煤炭学报,1995,20(5):492-496.LIANG Bing,ZHANG Meng-tao,PAN Yi-shan,et al.Theory of instability of flow fixation coupling for coal and gas outburst[J].Journal of China Coal Society,1995,20(5):492-496.
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