含水率对煤与瓦斯突出能量转化影响试验
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摘要
为获得煤层注水对煤与瓦斯突出弱化的影响规律,以阜新孙家湾煤矿埋深1100m突出煤层为研究对象,建立了煤与瓦斯突出能量转化模型,并利用自主研发的煤与瓦斯突出模拟试验系统,进行了含水率对煤与瓦斯突出试验影响研究,分析了煤样含水率与临界孔隙压力、突出强度、能量转化率之间的关系。试验结果表明:孔隙压力是煤与瓦斯突出的主要动力源,煤样含水率与临界孔隙压力间呈指数关系递增。煤样含水率由0%增加到3%、6%时,相对突出强度分别降低了5.67%、1.2%,随煤样含水率增加,相对突出强度与绝对突出强度将逐渐降低。瓦斯内能是影响煤体突出能量大小的关键因素,与突出孕育和突出激发过程均密切相关。随含水率增加,突出孕育能量和突出激发能量均线性增加,但突出能量转化率线性减小,不易发生煤与瓦斯突出。
In order to obtain the influence of water content on coal and gas outburst, the outburst coal seam of burial depth 1100 m in Sunjiawan mine of Fuxin was taken as the research object. The energy conversion model of coal and gas outburst was established, and the relationships between water content of coal samples and the critical pore pressure, the outburst intensity and the energy conversion rate were analyzed experimentally by using self-developed simulated test system for coal and gas outburst. The results show that the pore pressure is the main power source of coal and gas outburst, and the water content increases with the critical pore pressure exponentially. When the water content is increased from 0% to 3% and 6%, the relative protruding strength is decreased by 5.67% and 1.2% respectively. With increasing water content of coal samples, the absolute and relative outburst intensities decrease gradually. The gas internal energy turns out to be the key influential factor for the outburst energy, and is closely related to the outburst preparation and excitation processes. With the increase of water content, both energies of outburst preparation and excitation increase linearly, but the conversion rate of the outburst energy decreases linearly. Coal and gas outburst thus are not easy to occur.
In order to obtain the influence of water content on coal and gas outburst, the outburst coal seam of burial depth 1100 m in Sunjiawan mine of Fuxin was taken as the research object. The energy conversion model of coal and gas outburst was established, and the relationships between water content of coal samples and the critical pore pressure, the outburst intensity and the energy conversion rate were analyzed experimentally by using self-developed simulated test system for coal and gas outburst. The results show that the pore pressure is the main power source of coal and gas outburst, and the water content increases with the critical pore pressure exponentially. When the water content is increased from 0% to 3% and 6%, the relative protruding strength is decreased by 5.67% and 1.2% respectively. With increasing water content of coal samples, the absolute and relative outburst intensities decrease gradually. The gas internal energy turns out to be the key influential factor for the outburst energy, and is closely related to the outburst preparation and excitation processes. With the increase of water content, both energies of outburst preparation and excitation increase linearly, but the conversion rate of the outburst energy decreases linearly. Coal and gas outburst thus are not easy to occur.
引文
[1] 程远平,刘洪永,赵伟.我国煤与瓦斯突出事故现状及防治对策[J].煤炭科学技术,2014,42(6):15-18 (CHENG Yuanping,LIU Hongyong,ZHAO Wei.Status and prevention countermeasures of coal and gas outburst accidents in China[J].Coal Science and Technology,2014,42(6):15-18 (in Chinese))
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[6] 李家卓,朱传奇,刘万荣,等.极松软煤层工作面片帮力学机制分析与煤体加固实验研究[J].实验力学,2017(4):559-567 (LI Jiazhuo,ZHU Chuanqi,LIU Wangrong,et al.Experimental study of coal seam reinforcement and mechanism analysis of working surface rib spalling for very soft coal seam[J].Journal of Experimental Mechanics,2017(4):559-567 (in Chinese))
[7] 张辉,程利兴,李国盛.基于巴西劈裂法的饱水煤样能量耗散特征研究[J].实验力学,2016,31(4):534-542 (ZHANG Hui,CHENG Lixing,LI Guosheng.Study of energy dissipation characteristic of saturated coal sample based on Brazil splitting method[J].Journal of Experimental Mechanics,2016,31(4):534-542 (in Chinese))
[8] 李祥春,聂百胜.煤吸附水特性的研究[J].太原理工大学学报,2006,37(4):417-419 (LI Xiangchun,NIE Baisheng.Characteristics of coal adsorbed water[J].Journal of Taiyuan University of Technology,2006,37(4):417-419 (in Chinese))
[9] 李志强,唐旭,王兆丰.煤层注水增湿区域防突试验与参数优化的渗流力学数值解[J].煤矿安全,2012,43(9):10-13 (LI Zhiqiang,TANG Xu,WANG Zhaofeng.Regional outburst prevention test by coal seam infusion humidification and permeation fluid mechanics numerical solution of parameter optimization[J].Safety in Coal Mines,2012,43(9):10-13 (in Chinese))
[10] 石必明,穆朝民.突出煤层注水湿润防突试验研究[J].煤炭科学技术,2013,41(9):147-150 (SHI Biming,MU Chaomin.Experiment study on water injection and moist role for outburst prevention of outburst seam[J].Coal Science and Technology,2013,41(9):147-150 (in Chinese))
[11] 蒋长宝,尹光志,许江,等.煤层原始含水率对煤与瓦斯突出危险程度的影响[J].重庆大学学报,2014,37(1):91-95 (JIANG Changbao,YIN Guangzhi,XU Jiang,et al.The effect of original moisture content in coal beds on coal and gas outburst risk level[J].Journal of Chongqing University,2014,37(1):91-95 (in Chinese))
[12] 韦纯福,李化敏,袁瑞甫.含水率对煤与瓦斯突出强度影响的试验研究[J].煤炭科学技术,2014,42(6):118-121 (WEI Chunfu,LI Huamin,YUAN Ruifu.Experimental study on intensity of coal and gas outburst effected by coal water content[J].Coal Science and Technology,2014,42(6):118-121 (in Chinese))
[13] 许江,耿加波,彭守建,等.不同含水率条件下煤与瓦斯突出的声发射特性[J].煤炭学报,2015,40(5):1047-1054 (XU Jiang,GENG Jiabo,PENG Shoujian,et al.Acoustic emission characteristics of coal and gas outburst under different moisture contents[J].Journal of China Coal Society,2015,40(5):1047-1054 (in Chinese))
[14] 胡千庭,文光才.煤与瓦斯突出的力学作用机理[M].北京:科学出版社,2013 (HU Qianting.Mechanical mechanism of coal and gas outburst[M].Beijing:Science Press,2013 (in Chinese))
[15] 文光才,周俊,刘胜.对突出做功的瓦斯内能的研究[J].矿业安全与环保,2002,29(1):1-3 (WEN Guangcai,ZHOU Jun,LIU Sheng.Study on the internal energy of gas with outstanding work[J].Mining Safety and Environmental Protection,2002,29(1):1-3 (in Chinese))
[16] 文光才.煤与瓦斯突出能量的研究[J].矿业安全与环保,2003,30(6):1-3 (WEN Guangcai.Study of coal and gas outburst energy[J].Mining Safety and Environmental Protection,2003,30(6):1-3 (in Chinese))
[17] 鲜学福,许江,王宏图.煤与瓦斯突出潜在危险区(带)预测[J].中国工程科学,2001,3(2):39-46 (XIAN Xuefu,XU Jiang,WANG Hongtu.Predication of potential danger region(zone) of coal and gas outburst[J].Engineering Science,2001,3(2):39-46 (in Chinese))
[18] 谢雄刚.石门揭煤过程煤与瓦斯突出的注液冻结防治理论及技术研究[D].中南大学,2010:22-23 (XIE Xionggang.Study on the control theory and technology by injecting liquid and freezing of the coal and gas outburst during uncovering coal seam in cross-cut[D].Central South University,2010:22-23 (in Chinese))
[19] 易俊,姜永东,鲜学福.应力场、温度场瓦斯渗流特性实验研究 [J].中国矿业,2007,16(5):113-116 (YI Jun,JIANG Yongdong,XIAN Xuefu.An experimental research on the characters of methane seepage in stress field and temperature field[J].China Mining Magazine,2007,16(5):113-116 (in Chinese))
[20] 王刚,武猛猛,王海洋,等.基于能量平衡模型的煤与瓦斯突出影响因素的灵敏度分析[J].岩石力学与工程学报,2015,34(2):238-248 (WANG Gang,WU Mengmeng,WANG Haiyang,et al.Sensitivity analysis of factors affecting coal and gas outburst based on a energy equilibrium model[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(2):238-248 (in Chinese))
[21] 唐巨鹏,潘一山,杨森林.三维应力下煤与瓦斯突出模拟试验研究[J].岩石力学与工程学报,2013,32(5):960-965 (TANG Jupeng,PAN Yishan,YANG Senlin.Experimental study of coal and gas outbursts under tridimensional stresses[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(5):960-965 (in Chinese))
[22] 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(10):2769-2774 (TANG Jupeng,YANG Shenlin,WANG Yalin,et al.Experiment of coal and gas outbursts under ground stress and gas pressure in deep mines[J].Rock and Soil Mechanics,2014(10):2769-2774 (in Chinese))
[23] 唐巨鹏.煤层气赋存运移的核磁共振成像理论和实验研究[D].阜新:辽宁工程技术大学,2006 (TANG Jupeng.Theoretical and experimental research of storage and transport of coalbed methane by NMR technique[D].Fuxin:Liaoning Technical University,2006 (in Chinese))
[24] 程明俊.煤渗透性能及煤与瓦斯突出过程模拟实验研究[D].重庆大学,2008:71-72 (CHENG Mingjie.research on the permeability of coal and the simulation of coal and gas outburst process[D].Chongqing University,2018:71-72 (in Chinese))
[25] 周文杰.煤与瓦斯突出因素的模拟实验研究[D].重庆大学,2012 (ZHOU Wenjie.Experimental study on the factors of coal and gas outburst[D].University of Chongqing,2012 (in Chinese))
[2] 刘雪莉,游继军.新型煤与瓦斯突出预测指标确定及应用[J].煤炭科学技术,2015,43(3):56-58,63 (LIU XueIi,YOU Jijun.Determination and application on new coal and gas outburst prediction index[J].Coal Science and Technology,2015,43(3):56-58,63 (in Chinese))
[3] 于不凡.煤和瓦斯突出机制[M].北京:煤炭工业出版,1985 (YU Bufan.The mechanism of coal and gas outburst[M].Beijing:China Coal Industry Publishing House,1985 (in Chinese))
[4] 蒋承林.煤层注水的防突机理分析[J].湘潭工学院学报,1999,14(3):1-4 (JIANG Chenglin.Analysis of anti outburst mechanism of water injection in coal seam[J].Journal of Xiangtan Mining Institute,1999,14(3):1-4 (in Chinese))
[5] 王俊峰,张力,赵东.温度及含水率对切削原煤吸附瓦斯特性的影响[J].煤炭学报,2011,36(12):2086-2091 (WANG Junfeng,ZHANG Li,ZHAO Dong.Effect of temperature and moisture on raw coal adsorption characteristics[J].Journal of China Coal Society,2011,36(12):2086-2091 (in Chinese))
[6] 李家卓,朱传奇,刘万荣,等.极松软煤层工作面片帮力学机制分析与煤体加固实验研究[J].实验力学,2017(4):559-567 (LI Jiazhuo,ZHU Chuanqi,LIU Wangrong,et al.Experimental study of coal seam reinforcement and mechanism analysis of working surface rib spalling for very soft coal seam[J].Journal of Experimental Mechanics,2017(4):559-567 (in Chinese))
[7] 张辉,程利兴,李国盛.基于巴西劈裂法的饱水煤样能量耗散特征研究[J].实验力学,2016,31(4):534-542 (ZHANG Hui,CHENG Lixing,LI Guosheng.Study of energy dissipation characteristic of saturated coal sample based on Brazil splitting method[J].Journal of Experimental Mechanics,2016,31(4):534-542 (in Chinese))
[8] 李祥春,聂百胜.煤吸附水特性的研究[J].太原理工大学学报,2006,37(4):417-419 (LI Xiangchun,NIE Baisheng.Characteristics of coal adsorbed water[J].Journal of Taiyuan University of Technology,2006,37(4):417-419 (in Chinese))
[9] 李志强,唐旭,王兆丰.煤层注水增湿区域防突试验与参数优化的渗流力学数值解[J].煤矿安全,2012,43(9):10-13 (LI Zhiqiang,TANG Xu,WANG Zhaofeng.Regional outburst prevention test by coal seam infusion humidification and permeation fluid mechanics numerical solution of parameter optimization[J].Safety in Coal Mines,2012,43(9):10-13 (in Chinese))
[10] 石必明,穆朝民.突出煤层注水湿润防突试验研究[J].煤炭科学技术,2013,41(9):147-150 (SHI Biming,MU Chaomin.Experiment study on water injection and moist role for outburst prevention of outburst seam[J].Coal Science and Technology,2013,41(9):147-150 (in Chinese))
[11] 蒋长宝,尹光志,许江,等.煤层原始含水率对煤与瓦斯突出危险程度的影响[J].重庆大学学报,2014,37(1):91-95 (JIANG Changbao,YIN Guangzhi,XU Jiang,et al.The effect of original moisture content in coal beds on coal and gas outburst risk level[J].Journal of Chongqing University,2014,37(1):91-95 (in Chinese))
[12] 韦纯福,李化敏,袁瑞甫.含水率对煤与瓦斯突出强度影响的试验研究[J].煤炭科学技术,2014,42(6):118-121 (WEI Chunfu,LI Huamin,YUAN Ruifu.Experimental study on intensity of coal and gas outburst effected by coal water content[J].Coal Science and Technology,2014,42(6):118-121 (in Chinese))
[13] 许江,耿加波,彭守建,等.不同含水率条件下煤与瓦斯突出的声发射特性[J].煤炭学报,2015,40(5):1047-1054 (XU Jiang,GENG Jiabo,PENG Shoujian,et al.Acoustic emission characteristics of coal and gas outburst under different moisture contents[J].Journal of China Coal Society,2015,40(5):1047-1054 (in Chinese))
[14] 胡千庭,文光才.煤与瓦斯突出的力学作用机理[M].北京:科学出版社,2013 (HU Qianting.Mechanical mechanism of coal and gas outburst[M].Beijing:Science Press,2013 (in Chinese))
[15] 文光才,周俊,刘胜.对突出做功的瓦斯内能的研究[J].矿业安全与环保,2002,29(1):1-3 (WEN Guangcai,ZHOU Jun,LIU Sheng.Study on the internal energy of gas with outstanding work[J].Mining Safety and Environmental Protection,2002,29(1):1-3 (in Chinese))
[16] 文光才.煤与瓦斯突出能量的研究[J].矿业安全与环保,2003,30(6):1-3 (WEN Guangcai.Study of coal and gas outburst energy[J].Mining Safety and Environmental Protection,2003,30(6):1-3 (in Chinese))
[17] 鲜学福,许江,王宏图.煤与瓦斯突出潜在危险区(带)预测[J].中国工程科学,2001,3(2):39-46 (XIAN Xuefu,XU Jiang,WANG Hongtu.Predication of potential danger region(zone) of coal and gas outburst[J].Engineering Science,2001,3(2):39-46 (in Chinese))
[18] 谢雄刚.石门揭煤过程煤与瓦斯突出的注液冻结防治理论及技术研究[D].中南大学,2010:22-23 (XIE Xionggang.Study on the control theory and technology by injecting liquid and freezing of the coal and gas outburst during uncovering coal seam in cross-cut[D].Central South University,2010:22-23 (in Chinese))
[19] 易俊,姜永东,鲜学福.应力场、温度场瓦斯渗流特性实验研究 [J].中国矿业,2007,16(5):113-116 (YI Jun,JIANG Yongdong,XIAN Xuefu.An experimental research on the characters of methane seepage in stress field and temperature field[J].China Mining Magazine,2007,16(5):113-116 (in Chinese))
[20] 王刚,武猛猛,王海洋,等.基于能量平衡模型的煤与瓦斯突出影响因素的灵敏度分析[J].岩石力学与工程学报,2015,34(2):238-248 (WANG Gang,WU Mengmeng,WANG Haiyang,et al.Sensitivity analysis of factors affecting coal and gas outburst based on a energy equilibrium model[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(2):238-248 (in Chinese))
[21] 唐巨鹏,潘一山,杨森林.三维应力下煤与瓦斯突出模拟试验研究[J].岩石力学与工程学报,2013,32(5):960-965 (TANG Jupeng,PAN Yishan,YANG Senlin.Experimental study of coal and gas outbursts under tridimensional stresses[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(5):960-965 (in Chinese))
[22] 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(10):2769-2774 (TANG Jupeng,YANG Shenlin,WANG Yalin,et al.Experiment of coal and gas outbursts under ground stress and gas pressure in deep mines[J].Rock and Soil Mechanics,2014(10):2769-2774 (in Chinese))
[23] 唐巨鹏.煤层气赋存运移的核磁共振成像理论和实验研究[D].阜新:辽宁工程技术大学,2006 (TANG Jupeng.Theoretical and experimental research of storage and transport of coalbed methane by NMR technique[D].Fuxin:Liaoning Technical University,2006 (in Chinese))
[24] 程明俊.煤渗透性能及煤与瓦斯突出过程模拟实验研究[D].重庆大学,2008:71-72 (CHENG Mingjie.research on the permeability of coal and the simulation of coal and gas outburst process[D].Chongqing University,2018:71-72 (in Chinese))
[25] 周文杰.煤与瓦斯突出因素的模拟实验研究[D].重庆大学,2012 (ZHOU Wenjie.Experimental study on the factors of coal and gas outburst[D].University of Chongqing,2012 (in Chinese))
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