突出煤-瓦斯在巷道内的运移规律
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摘要
以煤与瓦斯突出过程中煤-瓦斯两相流为研究对象,利用自主研发的煤与瓦斯突出动力效应模拟试验装置进行了巷道中突出煤-瓦斯两相流试验研究,通过试验观察将煤颗粒的运动过程分为加速、平衡减速及沉降等运动阶段,并综合运用固体颗粒在气流中的悬浮运动机理和能量守恒定律,建立了一维情况下突出煤在巷道中的运移数学模型。通过模型计算分析得到,突出煤颗粒运移距离随初始气流速度的增大呈增大趋势,随颗粒粒径的分布规律由于其符合的流动状态不同而不同。
Focusing on the coal-gas two-phase flow in the process of coal and gas outburst,the experimental study on outburst coal-gas two-phase flow in roadway is carried out by using self-developed dynamic effect of coal and gas outburst simulation test device.According to observations,the movement of coal particles in the test can be divided into acceleration stage,balance deceleration stage and settlement stage.The mathematical model of the movement of the outburst coal in the roadway is established by combining the suspension motion mechanism and the conservation of energy law of the solid particles in the airflow.Through the model calculation and analysis,the migration distance of the coal particles increases with the increase of the initial air velocity.Due to the different flow states,the law that the migration distance varies with the particle size is different. The mathematical model provides a quantitative analysis method for the engineering calculation of coal-gas two-phase flow of coal and gas outburst.
Focusing on the coal-gas two-phase flow in the process of coal and gas outburst,the experimental study on outburst coal-gas two-phase flow in roadway is carried out by using self-developed dynamic effect of coal and gas outburst simulation test device.According to observations,the movement of coal particles in the test can be divided into acceleration stage,balance deceleration stage and settlement stage.The mathematical model of the movement of the outburst coal in the roadway is established by combining the suspension motion mechanism and the conservation of energy law of the solid particles in the airflow.Through the model calculation and analysis,the migration distance of the coal particles increases with the increase of the initial air velocity.Due to the different flow states,the law that the migration distance varies with the particle size is different. The mathematical model provides a quantitative analysis method for the engineering calculation of coal-gas two-phase flow of coal and gas outburst.
引文
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[14]鹿鹏,陈晓平,梁财,等.不同煤粉高压密相气力输送特性实验研究[J].中国电机工程学报,2009,29(5):16-20.LU Peng,CHEN Xiaoping,LIANG Cai,et al. Experimental study on the characteristics of high-pressure and dense-phase pneumatic conveying of different pulverized coal[J]. Proceedings of the CSEE,2009,29(5):16-20.
[15]彭小敏,朱力平,袁竹林.固气比对超浓相煤粉气力输送流型影响的模拟[J].热能动力工程,2012,27(3):329-335.PENG Xiaomin,ZHU Liping,YUAN Zhulin.Simulation of the influence of the solid/gas ratio on the super-dense phase pulverized coal pneumatic transmission flow pattern[J]. Journal of Engineering for Thermal Energy&Power,2012,27(3):329-335.
[16]曹偈,孙海涛,戴林超,等.煤与瓦斯突出动力效应的模拟研究[J].中国矿业大学学报,2018,47(1):100-107.CAO Jie,SUN Haitao,DAI Linchao,et al. Simulation research on dynamic effect of coal and gas outburst[J]. Journal of China University of Mining&Technology,2018,47(1):100-107.
[2]唐巨鹏,杨森林,王亚林,等.地应力和瓦斯压力作用下深部煤与瓦斯突出试验[J].岩土力学,2014,35(10):2769-2774.TANG Jupeng,YANG Senlin,WANG Yalin,et al.Experiment of coal and gas outbursts underground stress and gas pressure in deep mines[J].Rock and Soil Mechanics,2014,35(10):2769-2774.
[3] TU Qingyi,CHENG Yuanping,GUO Pinkun,et al. Experimental study of coal and gas outbursts related to gas-enriched areas[J].Rock Mechanics&Rock Engineering,2016,49(9):1-13.
[4]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.CHENG Wuyi,LIU Xiaoyu,WANG Kuijun,et al.Study on regulation about shock-wave-front propagating for coal and gas outburst[J].Journal of China Coal Society,2004,29(1):57-60.
[5]张建方,王凯,韦彩平.煤与瓦斯突出冲击波的形成与传播规律研究[J].采矿与安全工程学报,2010,27(1):67-71.ZHANG Jianfang,WANG Kai,WEI Caipping. Formation and propagation of shock waves during coal and gas outbursts[J]. Journal of Mining&Safety Engineering,2010,27(1):67-71.
[6]杨书召,张瑞林.煤与瓦斯突出冲击波及瓦斯气流所致伤害研究[J].中国安全科学学报,2012,22(11):62-66.YANG Shuzhao,ZHANG Ruilin. Research on injuries due to shock wave and gas flow from coal and gas outburst[J]. China Safety Science Journal,2012,22(11):62-66.
[7]苗法田,孙东玲,胡千庭.煤与瓦斯突出冲击波的形成机理[J].煤炭学报,2013,38(3):367-372.MIAO Fatian,SUN Dongling,HU Qianting.The formation mechanism of shock waves in the coal and gas outburst process[J]. Journal of China Coal Society,2013,38(3):367-372.
[8]魏建平,朱会启,温志辉,等.煤与瓦斯突出冲击波传播规律实验研究[J].煤,2010,19(8):11-13.WEI Jianping,ZHU Huiqi,WEN Zhihui,et al.Coal and gas outburst shock wave propagation experiments[J].Coal,2010,19(8):11-13.
[9]王凯,周爱桃,魏高举,等.直巷道中突出冲击气流的形成及传播特征研究[J].采矿与安全工程学报,2012,29(4):559-563.WANG Kai,ZHOU Aitao,WEI Gaoju,et al. Study of formation and propagation characteristics of shock wave and gas flow of outburst at straight roadway[J].Journal of Mining&Safety Engineering,2012,29(4):559-563.
[10] WANG Kai,ZHOU Aitao,ZHANG Jianfang,et al.Real-time numerical simulations and experimental research for the propagation characteristics of shock waves and gas flow during coal and gas outburst[J].Safety Science,2012,50(4):835-841.
[11] ZHOU Aitao,WANG Kai,WU Zeqi.Propagation law of shock waves and gas flow in cross roadway caused by coal and gas outburst[J].International Journal of Mining Science and Technology,2014,24(1):23-29.
[12] ZHAO Wei,CHENG Yuanping,GUO Pinkun,et al. An analysis of the gas-solid plug flow formation:New insights into the coal failure process during coal and gas outbursts[J].Powder Technology,2017,305:39-47.
[13]梁财,陈晓平,鹿鹏,等.高压相变粒径煤粉气力输送阻力特性[J].东南大学学报(自然科学版),2009,39(3):641-645.LIANG Cai,CHEN Xiaoping,LU Peng,et al. Resistance characteristics of dense-phase pneumatic conveying pulverized coal with various particle size under high pressure[J]. Journal of Southeast University(Natural Science Edition),2009,39(3):641-645.
[14]鹿鹏,陈晓平,梁财,等.不同煤粉高压密相气力输送特性实验研究[J].中国电机工程学报,2009,29(5):16-20.LU Peng,CHEN Xiaoping,LIANG Cai,et al. Experimental study on the characteristics of high-pressure and dense-phase pneumatic conveying of different pulverized coal[J]. Proceedings of the CSEE,2009,29(5):16-20.
[15]彭小敏,朱力平,袁竹林.固气比对超浓相煤粉气力输送流型影响的模拟[J].热能动力工程,2012,27(3):329-335.PENG Xiaomin,ZHU Liping,YUAN Zhulin.Simulation of the influence of the solid/gas ratio on the super-dense phase pulverized coal pneumatic transmission flow pattern[J]. Journal of Engineering for Thermal Energy&Power,2012,27(3):329-335.
[16]曹偈,孙海涛,戴林超,等.煤与瓦斯突出动力效应的模拟研究[J].中国矿业大学学报,2018,47(1):100-107.CAO Jie,SUN Haitao,DAI Linchao,et al. Simulation research on dynamic effect of coal and gas outburst[J]. Journal of China University of Mining&Technology,2018,47(1):100-107.
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