透气夹矸对煤样渗透特性影响的试验研究
|
摘要
采用自主研发的"散碎煤岩体瓦斯运移特性试验装置",分别对纯煤试样、含单层夹矸试样、含双层夹矸试样开展不同条件下的瓦斯流动特性试验,并进行了理论分析.结果表明:煤与夹矸之间存在挤压变形作用,挤压变形速率先减小后增大;透气性夹矸层对煤层渗透率的促进效果随夹矸孔隙率的降低和夹矸层数的增加而减弱;夹矸层物性特征的变化并不会改变煤层渗透率与瓦斯压力的二次函数关系;夹矸层数的增加会减弱其对滑脱效应的阻碍作用.
The influence of porosity,layer number and other physical properties of gas breathable gangue on the permeability characteristics of coal seam were studied using a self-developed gas migration characteristic test device.In the experiment,the gas flow characteristics of pure coal sample,single-layer gangue sample and double-layer gangue sample were tested under different conditions,and the theoretical analysis was carried out.The results show that there is extrusion deformation between coal and gangue,and the deformation speed decreases at first and then increases.The permeability of coal seams decreases with the decreasing of the gangue porosity and the increasing of the gangue number.The change of gangue physical characteristics will not change the quadratic function relationship between the permeability of coal seam and the gas pressure.The increasing of gangue layer will weaken its hindrance to the slippage effect.
The influence of porosity,layer number and other physical properties of gas breathable gangue on the permeability characteristics of coal seam were studied using a self-developed gas migration characteristic test device.In the experiment,the gas flow characteristics of pure coal sample,single-layer gangue sample and double-layer gangue sample were tested under different conditions,and the theoretical analysis was carried out.The results show that there is extrusion deformation between coal and gangue,and the deformation speed decreases at first and then increases.The permeability of coal seams decreases with the decreasing of the gangue porosity and the increasing of the gangue number.The change of gangue physical characteristics will not change the quadratic function relationship between the permeability of coal seam and the gas pressure.The increasing of gangue layer will weaken its hindrance to the slippage effect.
引文
[1]谢建林,赵阳升.随温度升高煤岩体渗透率减小或波动变化的细观机制[J].岩石力学与工程学报,2017,36(3):543-551.XIE Jianlin,ZHAO Yangsheng.Meso-mechanism of permeability decrease or fluctuation of coal and rock with the temperature increase[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(3):543-551.
[2]赵洪宝,王中伟.动力冲击对煤岩内部微结构影响的NMR定量表征[J].岩石力学与工程学报,2016,35(8):1569-1577.ZHAO Hongbao,WANG Zhongwei.Effects of dynamic loads on internal microstructure of coal by nuclear magnetic resonance(NMR)[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(8):1569-1577.
[3]许江,袁梅,李波波,等.煤的变质程度、孔隙特征与渗透率关系的试验研究[J].岩石力学与工程学报,2012,31(4):681-687.XU Jiang,YUAN Mei,LI Bobo,et al.Experimental study of relationships between metamorphic grade,pore characteristics and permeability of coal[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(4):681-687.
[4]SOMERTON W H,GUPTA V S.Role of fluxing agents in thermal alteration of sandstone[J].Journal of Petroleum Technology,1965,17(5):585-588.
[5]HOMANDETIENNE F,HOUPERT R.Thermally induced microcraking in granites:Characterization and analysis[J].International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts,1989,26(2):125-134.
[6]孙光中,王公忠,张瑞林.构造煤渗透率对温度变化响应规律的试验研究[J].岩土力学,2016,37(4):1042-1048.SUN Guangzhong,WANG Gongzhong,ZHANG Ruilin.An experimental study on response law of permeability of tectonic coal samples to temperature variation[J].Rock and Soil Mechanics,2016,37(4):1042-1048.
[7]魏建平,孙刘涛,王登科,等.温度冲击作用下煤的渗透率变化规律与增透机制[J].煤炭学报,2017,42(8):1919-1925.WEI Jianping,SUN Liutao,WANG Dengke,et al.Change law of permeability of coal under temperature impact and the mechanism of increasing permeability[J].Journal of China Coal Society,2017,42(8):1919-1925.
[8]吕闰生,彭苏萍,徐延勇.含瓦斯煤体渗透率与煤体结构关系的实验[J].重庆大学学报,2012,35(7):114-132.LRunsheng,PENG Suping,XU Yanyong.Experiments on the relationship between permeability of gas-bearing coal and coal body structure[J].Journal of Chongqing University,2012,35(7):114-132.
[9]ZANG J,WANG K.Gas sorption-induced coal swelling kinetics and its effects on coal permeability:Model development and analysis[J].Fuel,2017,189:164-177.
[10]隆清明,赵旭生,孔东玲,等.吸附作用对煤的渗透率影响规律实验研究[J].煤炭学报,2008,33(9):1030-1034.LONG Qingming,ZHAO Xusheng,KONG Dongling,et al.Experimental study on coal permeability by adsorption[J].Journal of China Coal Society,2008,33(9):1030-1034.
[11]周军平,鲜学福,李晓红,等.吸附不同气体对煤岩渗透特性的影响[J].岩石力学与工程学报,2010,29(11):2256-2261.ZHOU Junping,XIAN Xuefu,LI Xiaohong,et al.Effect of different adsorptional gases on permeability of coal[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(11):2256-2261.
[12]尹光志,李晓泉,赵洪宝,等.地应力对突出煤瓦斯渗流影响试验研究[J].岩石力学与工程学报,2008,27(12):2557-2561.YIN Guangzhi,LI Xiaoquan,ZHAO Hongbao,et al.Experimental research on effect of geo-stress on outburst coal’s gas seepage[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(12):2557-2561.
[13]尹光志,李小双,赵洪宝.瓦斯压力对突出煤瓦斯渗流影响试验研究[J].岩石力学与工程学报,2009,28(4):697-702.YIN Guangzhi,LI Xiaoshuang,ZHAO Hongbao.Experiment study of effect of gas pressure on gas seepage of outburst coal[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(4):697-702.
[14]尹光志,黄启翔,张东明,等.地应力场中含瓦斯煤岩变形破坏过程中瓦斯渗透特性的试验研究[J].岩石力学与工程学报,2010,29(2):336-343.YIN Guangzhi,HUANG Qixiang,ZHANG Dongming,et al.Test study of gas seepage characteristics of gas-bearing coal specimen during process of deformation and failure in geo-stress field[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(2):336-343.
[15]尹光志,李广治,赵洪宝,等.煤岩全应力-应变过程中瓦斯流动特性试验研究[J].岩石力学与工程学报,2010,29(1):170-175.YIN Guangzhi,LI Guangzhi,ZHAO Hongbao,et al.Experiment research on gas flow properties of coal specimens in complete stress-strain process[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(1):170-175.
[16]SOMERTON W H,SOYLEMEZOGLU I M,DUD-LEY R C.Effect of stress on permeability of coal[J].International Journal of Rock Mechanics and Mining Sciences&Geomechanics Abstracts,1975,12(5/6):129-145.
[17]LIU J,CHEN Z.Evolution of coal permeability from stress-controlled to displacement-controlled swelling conditions[J].Fuel,2011,90(10):2987-2997.
[18]徐超,付强,王凯,等.载荷方式对深部采动煤体损伤-渗透时效特性影响实验研究[J].中国矿业大学学报,2018,47(1):197-205.XU Chao,FU Qiang,WANG Kai,et al.Effects of the loading methods on the damage-permeability aging characteristics of deep mining coal[J].Journal of China University of Mining&Technology,2018,47(1):197-205.
[19]侯鹏,高峰,高亚楠,等.脉冲气压疲劳对原煤力学特性及渗透率的影响[J].中国矿业大学学报,2017,46(2):257-264.HOU Peng,GAO Feng,GAO Yanan,et al.Effect of pulse gas pressure fatigue on mechanical properties and permeability of raw coal[J].Journal of China U-niversity of Mining&Technology,2017,46(2):257-264.
[20]YIN G,JIANG C,WANG J G,et al.Combined effect of stress,pore pressure and temperature on methane permeability in anthracite coal:An experimental study[J].Transport in Porous Media,2013,100(1):1-16.
[21]李志强,鲜学福,隆清明.不同温度应力条件下煤体渗透率实验研究[J].中国矿业大学学报,2009,38(4):523-527.LI Zhiqiang,XIAN Xuefu,LONG Qinming.Experiment study of coal permeability under different temperature and stress[J].Journal of China University of Mining&Technology,2009,38(4):523-527.
[22]林柏泉,刘厅,杨威.基于动态扩散的煤层多场耦合模型建立及应用[J].中国矿业大学学报,2018,47(1):32-39.LIN Baiquan,LIU Ting,YANG Wei.Solid-gas coupling model for coal seams based on dynamic diffusion and its application[J].Journal of China University of Mining&Technology,2018,47(1):32-39.
[23]罗新荣.煤层瓦斯运移物理与数值模拟分析[J].煤炭学报,1992,17(2):49-55.LUO Xinrong.Physical and numeric simulation of methane migration in coal seam[J].Journal of China Coal Society,1992,17(2):49-55.
[24]周世宁.瓦斯在煤层中流动的机理[J].煤炭学报,1990,15(1):15-24.ZHOU Shining.Mechanism of gas flow in coal seam[J].Journal of China Coal Society,1990,15(1):15-24.
[25]王章瑞,高家碧.气体滑脱因子测试装置研究[J].西南石油大学学报(自然科学版),2008,30(2):172-174.WANG Zhangrui,GAO Jiabi.Research and design of the device for measuring gas slip factor[J].Journal of Southwest Petroleum University(Science&Technology Edition),2008,30(2):172-174.
[26]KLINKENBERG L J.The permeability of porous media to liquids and gases[J].Socar Proceedings,1941,2(2):200-213.
[2]赵洪宝,王中伟.动力冲击对煤岩内部微结构影响的NMR定量表征[J].岩石力学与工程学报,2016,35(8):1569-1577.ZHAO Hongbao,WANG Zhongwei.Effects of dynamic loads on internal microstructure of coal by nuclear magnetic resonance(NMR)[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(8):1569-1577.
[3]许江,袁梅,李波波,等.煤的变质程度、孔隙特征与渗透率关系的试验研究[J].岩石力学与工程学报,2012,31(4):681-687.XU Jiang,YUAN Mei,LI Bobo,et al.Experimental study of relationships between metamorphic grade,pore characteristics and permeability of coal[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(4):681-687.
[4]SOMERTON W H,GUPTA V S.Role of fluxing agents in thermal alteration of sandstone[J].Journal of Petroleum Technology,1965,17(5):585-588.
[5]HOMANDETIENNE F,HOUPERT R.Thermally induced microcraking in granites:Characterization and analysis[J].International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts,1989,26(2):125-134.
[6]孙光中,王公忠,张瑞林.构造煤渗透率对温度变化响应规律的试验研究[J].岩土力学,2016,37(4):1042-1048.SUN Guangzhong,WANG Gongzhong,ZHANG Ruilin.An experimental study on response law of permeability of tectonic coal samples to temperature variation[J].Rock and Soil Mechanics,2016,37(4):1042-1048.
[7]魏建平,孙刘涛,王登科,等.温度冲击作用下煤的渗透率变化规律与增透机制[J].煤炭学报,2017,42(8):1919-1925.WEI Jianping,SUN Liutao,WANG Dengke,et al.Change law of permeability of coal under temperature impact and the mechanism of increasing permeability[J].Journal of China Coal Society,2017,42(8):1919-1925.
[8]吕闰生,彭苏萍,徐延勇.含瓦斯煤体渗透率与煤体结构关系的实验[J].重庆大学学报,2012,35(7):114-132.LRunsheng,PENG Suping,XU Yanyong.Experiments on the relationship between permeability of gas-bearing coal and coal body structure[J].Journal of Chongqing University,2012,35(7):114-132.
[9]ZANG J,WANG K.Gas sorption-induced coal swelling kinetics and its effects on coal permeability:Model development and analysis[J].Fuel,2017,189:164-177.
[10]隆清明,赵旭生,孔东玲,等.吸附作用对煤的渗透率影响规律实验研究[J].煤炭学报,2008,33(9):1030-1034.LONG Qingming,ZHAO Xusheng,KONG Dongling,et al.Experimental study on coal permeability by adsorption[J].Journal of China Coal Society,2008,33(9):1030-1034.
[11]周军平,鲜学福,李晓红,等.吸附不同气体对煤岩渗透特性的影响[J].岩石力学与工程学报,2010,29(11):2256-2261.ZHOU Junping,XIAN Xuefu,LI Xiaohong,et al.Effect of different adsorptional gases on permeability of coal[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(11):2256-2261.
[12]尹光志,李晓泉,赵洪宝,等.地应力对突出煤瓦斯渗流影响试验研究[J].岩石力学与工程学报,2008,27(12):2557-2561.YIN Guangzhi,LI Xiaoquan,ZHAO Hongbao,et al.Experimental research on effect of geo-stress on outburst coal’s gas seepage[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(12):2557-2561.
[13]尹光志,李小双,赵洪宝.瓦斯压力对突出煤瓦斯渗流影响试验研究[J].岩石力学与工程学报,2009,28(4):697-702.YIN Guangzhi,LI Xiaoshuang,ZHAO Hongbao.Experiment study of effect of gas pressure on gas seepage of outburst coal[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(4):697-702.
[14]尹光志,黄启翔,张东明,等.地应力场中含瓦斯煤岩变形破坏过程中瓦斯渗透特性的试验研究[J].岩石力学与工程学报,2010,29(2):336-343.YIN Guangzhi,HUANG Qixiang,ZHANG Dongming,et al.Test study of gas seepage characteristics of gas-bearing coal specimen during process of deformation and failure in geo-stress field[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(2):336-343.
[15]尹光志,李广治,赵洪宝,等.煤岩全应力-应变过程中瓦斯流动特性试验研究[J].岩石力学与工程学报,2010,29(1):170-175.YIN Guangzhi,LI Guangzhi,ZHAO Hongbao,et al.Experiment research on gas flow properties of coal specimens in complete stress-strain process[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(1):170-175.
[16]SOMERTON W H,SOYLEMEZOGLU I M,DUD-LEY R C.Effect of stress on permeability of coal[J].International Journal of Rock Mechanics and Mining Sciences&Geomechanics Abstracts,1975,12(5/6):129-145.
[17]LIU J,CHEN Z.Evolution of coal permeability from stress-controlled to displacement-controlled swelling conditions[J].Fuel,2011,90(10):2987-2997.
[18]徐超,付强,王凯,等.载荷方式对深部采动煤体损伤-渗透时效特性影响实验研究[J].中国矿业大学学报,2018,47(1):197-205.XU Chao,FU Qiang,WANG Kai,et al.Effects of the loading methods on the damage-permeability aging characteristics of deep mining coal[J].Journal of China University of Mining&Technology,2018,47(1):197-205.
[19]侯鹏,高峰,高亚楠,等.脉冲气压疲劳对原煤力学特性及渗透率的影响[J].中国矿业大学学报,2017,46(2):257-264.HOU Peng,GAO Feng,GAO Yanan,et al.Effect of pulse gas pressure fatigue on mechanical properties and permeability of raw coal[J].Journal of China U-niversity of Mining&Technology,2017,46(2):257-264.
[20]YIN G,JIANG C,WANG J G,et al.Combined effect of stress,pore pressure and temperature on methane permeability in anthracite coal:An experimental study[J].Transport in Porous Media,2013,100(1):1-16.
[21]李志强,鲜学福,隆清明.不同温度应力条件下煤体渗透率实验研究[J].中国矿业大学学报,2009,38(4):523-527.LI Zhiqiang,XIAN Xuefu,LONG Qinming.Experiment study of coal permeability under different temperature and stress[J].Journal of China University of Mining&Technology,2009,38(4):523-527.
[22]林柏泉,刘厅,杨威.基于动态扩散的煤层多场耦合模型建立及应用[J].中国矿业大学学报,2018,47(1):32-39.LIN Baiquan,LIU Ting,YANG Wei.Solid-gas coupling model for coal seams based on dynamic diffusion and its application[J].Journal of China University of Mining&Technology,2018,47(1):32-39.
[23]罗新荣.煤层瓦斯运移物理与数值模拟分析[J].煤炭学报,1992,17(2):49-55.LUO Xinrong.Physical and numeric simulation of methane migration in coal seam[J].Journal of China Coal Society,1992,17(2):49-55.
[24]周世宁.瓦斯在煤层中流动的机理[J].煤炭学报,1990,15(1):15-24.ZHOU Shining.Mechanism of gas flow in coal seam[J].Journal of China Coal Society,1990,15(1):15-24.
[25]王章瑞,高家碧.气体滑脱因子测试装置研究[J].西南石油大学学报(自然科学版),2008,30(2):172-174.WANG Zhangrui,GAO Jiabi.Research and design of the device for measuring gas slip factor[J].Journal of Southwest Petroleum University(Science&Technology Edition),2008,30(2):172-174.
[26]KLINKENBERG L J.The permeability of porous media to liquids and gases[J].Socar Proceedings,1941,2(2):200-213.