顶板垮落诱发瓦斯灾害的试验研究
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摘要
利用旋转摩擦试验机进行了岩石摩擦、撞击的模拟试验研究,观测总结了岩石摩擦、撞击产生火花的现象,同时利用TVS-8000MKⅡ型红外热像仪实时采集岩石摩擦、撞击时岩石的瞬时红外辐射温度,得出岩石表面升温与岩石的垮落高度和岩石质量存在正相关关系.根据试验研究结果,分析了一定垮落高度下,岩石温度与岩石质量之间的温升规律,以及岩石辐射温度随时间衰减的变化规律,建立了岩石表面温升及温度衰减的时间效应关系数学模型.研究证实,由于顶板垮落过程中岩石间相互摩擦、撞击作用引起的表面温度升高和火花,可以成为诱发采空区瓦斯燃烧爆炸事故的点火源.
By using the rotating friction test machine,the similar simulation of rock mass friction and crash were carried out.The phenomenon of generating spark by rock mass friction and crash is observed and summarized.At the same time,when rock mass is frictionized or crashed by the infrared thermal imaging system of TVS-8000MKⅡ,the instant infrared radiant temperature of rock mass is collected in real-time,showing a positive correlation between the surface temperature rise and falling height & quantity of the rocks.Based on experiment results,the relation between temperature rise and collapse quantity of rocks is analyzed,obtaining the attenuation variation rule between radiant temperature and time.On the basis of this,the mathematical model of surface temperature rise and attenuation time effect is established.Therefore,the surface temperature rise and sparks caused by mutual function of rock mass friction or crash in the process of roof caving may lead to gas combustion and explosion in goaf.
By using the rotating friction test machine,the similar simulation of rock mass friction and crash were carried out.The phenomenon of generating spark by rock mass friction and crash is observed and summarized.At the same time,when rock mass is frictionized or crashed by the infrared thermal imaging system of TVS-8000MKⅡ,the instant infrared radiant temperature of rock mass is collected in real-time,showing a positive correlation between the surface temperature rise and falling height & quantity of the rocks.Based on experiment results,the relation between temperature rise and collapse quantity of rocks is analyzed,obtaining the attenuation variation rule between radiant temperature and time.On the basis of this,the mathematical model of surface temperature rise and attenuation time effect is established.Therefore,the surface temperature rise and sparks caused by mutual function of rock mass friction or crash in the process of roof caving may lead to gas combustion and explosion in goaf.
引文
[1]王玉武,姜文忠,牛德文,等.岩石摩擦引燃引爆瓦斯试验研究[J].煤矿安全,2002,33(12):8-10.WANG Yu-wu,JIANG Wen-zhong,NIU De-wen,et al.The experimental research on rockmass frictiondetonating gas[J].Safety in Coal Mines,2002,33(12):8-10.
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[9]彭焕良.热成像技术发展综述[J].激光与红外,1997,27(3):131-136.PENG Huan-liang.A summary of the developmentof thermal imaging technology[J].Laser and Infra-red,1997,27(3):131-136.
[10]谢兴华.燃烧理论[M].徐州:中国矿业大学出版社,2002.
[2]秦玉金,姜文忠,王学洋.采空区瓦斯爆炸(燃烧)点火源的确定[J].煤矿安全,2005,36(7):35-37.QIN Yu-jin,JIANG Wen-zhong,WANG Xue-yang.Determination the source of goaf gas explosion(com-bustion)[J].Safety in Coal Mines,2005,36(7):35-37.
[3]邬燕云,周心权,朱红青.高速冲击火花引燃甲烷的环境因素研究[J].中国矿业大学学报,2003,32(2):186-188.WU Yan-yun,ZHOU Xin-Quan,ZHU Hong-qing.Research of environmental factors for gas igniting bysparks induced by high-speed strike[J].Journal ofChina University of Mining&Technology,2003,32(2):186-188.
[4]余为,缪协兴,茅献彪,等.岩石撞击过程中的升温机理分析[J].岩石力学与工程学报,2005,24(9):1535-1538.YU Wei,MIAO Xie-xing,MAO Xian-biao,et al.Analysis of the heating-up mechanism in the course ofthe rock ram[J].Chinese Journal of Rock Mechanicsand Engineering,2005,24(9):1535-1538.
[5]吴立新,李国华,吴焕萍.热红外成像用于固体撞击瞬态过程监测的实验探索[J].科学通报,2001,46(2):172-176.WU Li-xin,LI Guo-hua,WU Huan-ping.Explora-tory experiment in the course of solid ram by thermal-image formation system[J].Chinese Science Bulle-tin,2001,46(2):172-176.
[6]吴立新,吴育华,刘善军,等.遥感-岩石力学(Ⅶ):岩石低速撞击的热红外遥感成像实验研究[J].岩石力学与工程学报,2004,23(9):1439-1445.WU Li-xin,WU Yu-hua,LIU Shan-jun,et al.Re-mote sensing-rock mechanics(Ⅶ):thermal infraredimaging detection of rock impaction with low velocity[J].Chinese Journal of Rock Mechanics and Engi-neering,2004,23(9):1439-1445.
[7]耿乃光,崔成禹,邓明德.岩石破裂实验中的遥感观测与遥感岩石力学的开端[J].地震学报,1992,14(增刊):645-652.GENG Nai-guang,CUI Cheng-yu,DENG Ming-de.Rock rack experiment in the remote sensing observa-tion and the threshold of remote sensing rock me-chanics[J].Acta Seismologica Sinica,1992,14(Supp):645-652.
[8]邓明德,耿乃光,崔成禹.岩石应力状态改变引起岩石热状态改变的研究[J].中国地震,1997,13(2):179-185.DENG Ming-de,GENG Nai-guang,CUI Cheng-yu.The study on the variation of thermal state of rockscaused by the variation of stress state of rock[J].Earthquake Research in China,1997,13(2):179-185.
[9]彭焕良.热成像技术发展综述[J].激光与红外,1997,27(3):131-136.PENG Huan-liang.A summary of the developmentof thermal imaging technology[J].Laser and Infra-red,1997,27(3):131-136.
[10]谢兴华.燃烧理论[M].徐州:中国矿业大学出版社,2002.
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