煤与瓦斯突出冲击波传播规律的实验研究
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摘要
本文以管状空间内气体爆炸冲击波传播理论为基础,采用理论分析与实验研究相结合的方法,系统地研究了模拟煤与瓦斯突出后实验管道内突出冲击波的传播规律。
本文研究由实验系统的搭建、理论分析和实验测试三个部分组成。首先,采用相似理论自行设计加工了一套带模拟巷道的煤与瓦斯突出实验系统;通过突出装置向模拟巷道内突出,由动态数据采集系统将压力传感器采集电信号转为数字信号,测试发生突出后管道内产生冲击波的压力变化特征。其次,根据气体动力学原理,分析了冲击波在传播过程中的影响因素(参与突出煤量、参与的瓦斯量及瓦斯压力、实验管道粗糙程度等);基于冲击波间断关系式,引入气体状态方程,推导出冲击波传播的超压公式和冲击气流的速度表达式。再次,在实验研究部分,验证了理论分析关于煤与瓦斯突出冲击波传播过程的结论;通过不同瓦斯压力及微型风机开启与否情况下的突出模拟实验,分析了参与突出的瓦斯量、瓦斯压力对突出冲击波传播的影响关系。最后,结合焦煤集团九里山矿15采区煤与瓦斯突出的具体实例进行分析,验证了理论推导公式的准确性。
实验结果表明,自行设计的煤与瓦斯突出模拟实验系统能较好地模拟出发生突出这一复杂的动力现象,成功地模拟了突出发生过程中冲击波在巷道中的传播过程;冲击波传播过程中的影响因素很多,其中最为重要的是煤体内贮存的瓦斯膨胀能(煤与瓦斯突出的强度),而瓦斯膨胀能与煤体吸附的瓦斯量及瓦斯压力关系密切。通过冲击波超压公式和冲击气流速度公式也可以验证这一点。本文的研究成果对煤与瓦斯突出事故防治和调查、分析提供较为重要的理论和技术支持。
In this paper, laws on shock wave produced in the experimental pipeline when coal and gas outbursts are simulated, are systematically studied by theoretical analysis and experimental study on the basis of gaseous explosion theory in tubular space.
The dissertation study is made up of three parts—the establishment of experimental systems, theory analysis and experimental test. Firstly, experimental systems with roadways are established according to similarity theory. Variation characteristics of pressures of shock wave are measured by helicopter rotor model experiments when coal and gas outbursts are simulated. Secondly, based on the principle of gas dynamics, influencing factors including the quality of the coal, the gas content and gas pressure, the roughness of experimental pipeline, and so on, are showed and analyzed. By analyzing on the intermittent relationship of shock wave and the gas state equation, the formula of overpressures shock wave and expression of gas velocity are deduced. In the part of the experimental study, they verify the research results of the shock wave for coal and gas outburst in the part two. The qualities of coal and pressures of the gas have influence on the shock wave of coal and gas outburst propagation law. Finally,
The research results from the established experimental systems in this dissertation support for the coal and gas outburst and shock wave in the experimental pipeline. There are many influence factors about the shock wave of coal and gas outburst propagation law, the most important is gas expansion energy which has a close relationship with gas desorption properties and gas pressures. It is proved by the formula of overpressures shock wave and expression of gas velocity. The research results provide the important theoretical and technical support to the prevention control and cure and investigation of coal and gas outburst.
本文研究由实验系统的搭建、理论分析和实验测试三个部分组成。首先,采用相似理论自行设计加工了一套带模拟巷道的煤与瓦斯突出实验系统;通过突出装置向模拟巷道内突出,由动态数据采集系统将压力传感器采集电信号转为数字信号,测试发生突出后管道内产生冲击波的压力变化特征。其次,根据气体动力学原理,分析了冲击波在传播过程中的影响因素(参与突出煤量、参与的瓦斯量及瓦斯压力、实验管道粗糙程度等);基于冲击波间断关系式,引入气体状态方程,推导出冲击波传播的超压公式和冲击气流的速度表达式。再次,在实验研究部分,验证了理论分析关于煤与瓦斯突出冲击波传播过程的结论;通过不同瓦斯压力及微型风机开启与否情况下的突出模拟实验,分析了参与突出的瓦斯量、瓦斯压力对突出冲击波传播的影响关系。最后,结合焦煤集团九里山矿15采区煤与瓦斯突出的具体实例进行分析,验证了理论推导公式的准确性。
实验结果表明,自行设计的煤与瓦斯突出模拟实验系统能较好地模拟出发生突出这一复杂的动力现象,成功地模拟了突出发生过程中冲击波在巷道中的传播过程;冲击波传播过程中的影响因素很多,其中最为重要的是煤体内贮存的瓦斯膨胀能(煤与瓦斯突出的强度),而瓦斯膨胀能与煤体吸附的瓦斯量及瓦斯压力关系密切。通过冲击波超压公式和冲击气流速度公式也可以验证这一点。本文的研究成果对煤与瓦斯突出事故防治和调查、分析提供较为重要的理论和技术支持。
In this paper, laws on shock wave produced in the experimental pipeline when coal and gas outbursts are simulated, are systematically studied by theoretical analysis and experimental study on the basis of gaseous explosion theory in tubular space.
The dissertation study is made up of three parts—the establishment of experimental systems, theory analysis and experimental test. Firstly, experimental systems with roadways are established according to similarity theory. Variation characteristics of pressures of shock wave are measured by helicopter rotor model experiments when coal and gas outbursts are simulated. Secondly, based on the principle of gas dynamics, influencing factors including the quality of the coal, the gas content and gas pressure, the roughness of experimental pipeline, and so on, are showed and analyzed. By analyzing on the intermittent relationship of shock wave and the gas state equation, the formula of overpressures shock wave and expression of gas velocity are deduced. In the part of the experimental study, they verify the research results of the shock wave for coal and gas outburst in the part two. The qualities of coal and pressures of the gas have influence on the shock wave of coal and gas outburst propagation law. Finally,
The research results from the established experimental systems in this dissertation support for the coal and gas outburst and shock wave in the experimental pipeline. There are many influence factors about the shock wave of coal and gas outburst propagation law, the most important is gas expansion energy which has a close relationship with gas desorption properties and gas pressures. It is proved by the formula of overpressures shock wave and expression of gas velocity. The research results provide the important theoretical and technical support to the prevention control and cure and investigation of coal and gas outburst.
引文
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[8]于不凡.矿井瓦斯灾害防治及利用技术手册[M].北京:煤炭工业出版社,2000
[9]氏平增之.煤和瓦斯突出的模型研究及其机理探讨[C].第二十一届国际采矿安全会议论文集.1985,80-85
[10]郑哲敏,从数量级和量纲分析看煤与瓦斯突出的机理[C].煤与瓦斯突出机理和预测预报第三次科研工作及学术交流会议论文集,1983:3-11
[11]于不凡,煤与瓦斯突出机理[M].北京:煤炭工业出版社,1985
[12]俞启香,矿井瓦斯防治[M].徐州:中国矿大出版社,1992
[13]蒋承林,俞启香.煤与瓦斯突出过程中能量耗散规律的研究[J].煤炭学报,1996,21(2):173-178
[14]中国矿业大学瓦斯组.煤和瓦斯突出的防治[M].北京:煤炭工业出版社,1979
[15] S.Valliappan,A role of methane gas emission in coal outbursts,Fuel, 1998 Vol.39 , 875-895
[16]程五一,陈国新.煤与瓦斯突出冲击波的形成及模型的建立[J].煤矿安全,2000.9,31(9):23-25
[17]程五一,刘晓宇,王魁军等.煤与瓦斯突出冲击波阵面传播规律的研究[J].煤炭学报,2004,29(1):57-60
[18]魏建平,魏国营,郝富昌等.严重突出煤层水力掏槽措施期间抗灾能力研究报告[R].河南理工大学.2004.12
[19] Paterson, A model for outburst in coal. Int. J. Rock Mech. Min. Sci &Geomech, Abstr,Vol 23, 327-332
[20] Litwiniszyn, A model for the initiation of coal-gas outburst, Int. J. Rock Mech. Min. Sci&Geomech, Abstr, 1985.Vol 22,No.1, 39-46
[21]董钢锋,梁运培.突出煤瓦斯涌出规律及逆流形成的条件分析[J].煤炭科技,2001,4:46-48
[22]李翼祺,马素贞.爆炸力学[M].北京:科学出版社,1992
[23]陈义良.燃烧原理[M].北京:航空工业出版社,1992
[24] H?泡拉契克,R?J?西格.激波的相互作用[M].北京:科学出版社,1988
[25] W?D?黑斯.气体动力突跃的基本理论[M].北京:科学出版社,1988
[26]王大龙.煤矿瓦斯爆炸冲击波传播规律研究[J].中国科技论文在线. http://www.paper.edu.cn,2006.11
[27]王云艳.爆炸空气冲击波在巷道转弯处的传播特性[J].安全与环境学报. 2007,7(3):105-106
[28]司荣军,王春秋,张延松等.瓦斯煤尘爆炸传播研究综述及展望[J].矿业安全与环保.2007,34(1) :72-74
[29]张强,孙玉荣,王晓勇等.煤与瓦斯突出冲击波传播规律的研究[J].矿业安全与环保.2007,34(1):21-23
[30]蒋承林,俞启香.煤与瓦斯突出球壳失稳机理及防治技术[M].中国矿业大学.1998
[31] Roark R J,Young W C.应力应变公式[M].汪一麟,汪一骏译.北京:中国建筑工业出版社.1985
[32] Juliusz Topolnicki, Energy balance in an outburst, Int.symp.cum Workshop on Management &control of High Gas Emission &Outbursts Wollongng, March, 1995, 67-74
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