新疆沙吉海煤矿侏罗系软岩气态水吸附特性实验
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摘要
针对软岩巷道围岩吸水发生变形、强度劣化及失稳破坏的现象,采用新疆沙吉海煤矿煤系地层侏罗系泥岩样品开展气态水吸附特性实验研究,得到了泥岩气态水吸附特性曲线Q-t.通过非线性拟合分析,建立了泥岩的吸水特征方程,分析了气态水吸附速率的演化规律.结合电镜扫描与X射线衍射试验结果,探讨了全岩矿物、黏土矿物及微观结构等物理参数对泥岩气态水吸附特性的影响.结果表明:(1) 5个泥岩样品的气态水吸附特性及变化规律相似,吸水量与吸水时间呈正相关;根据吸水特征方程求导分析,得出吸水速率与吸水时间呈负相关.(2)泥岩样品在吸水过程中速率降低,主要是由于内部孔隙壁面发生膨胀,泥岩孔隙过水通道变窄,吸水受到阻碍.(3)泥岩中含有的蒙脱石与伊/蒙混层具有强亲水性,间接造成泥岩吸附气态水能力强,其微裂隙在水及多应力场作用下扩大和贯通,进一步降低了围岩稳定性.研究结果为新疆沙吉海煤矿侏罗系地层软岩巷道的稳定性控制研究提供了理论依据.
Aiming at the phenomena of deformation,strength deterioration and destabilization of surrounding rock water absorption in soft rock roadway,the experimental study on the characteristics of gaseous water adsorption in the coal-sediment jurassic mudstone samples from the Shajihai Coal Mine in Xinjiang is carried out,and the gas-water adsorption characteristic curve Q-t of mudstone is obtained. Through the nonlinear fitting analysis,the water absorption characteristic equation of mudstone is established,and the evolution law of gaseous water adsorption rate is analyzed. Combined with the results of scanning electron microscopy and X-ray diffraction experiments,the effects of physical parameters such as minerals,clay minerals and microstructure on the adsorption characteristics of mudstone gaseous water are discussed. Results show that:( 1) The adsorption characteristics and variation of gaseous water in the five mudstone samples are similar,and the water absorption is positively correlated with the water absorption time. According to the water absorption characteristic equation,the water absorption rate is negatively correlated with the water absorption time.( 2) The rate of mudstone samples decreases during the water absorption process,mainly due to the expansion of the inner pore wall surface,the narrowing of the mudstone pore water passage,and the water absorption is hindered.( 3) The montmorillonite and the Yi/Mongolian mixed layer contained in the mudstone have strong hydrophilicity,which indirectly causes the mudstone to have strong ability to adsorb gaseous water. The micro-cracks expand and penetrate under the action of water and multi-stress fields,further reducing the stability of the surrounding rock.The research results has provided a theoretical basis for the study of stability control of soft rock roadway in jurassic strata in Shajihai Coal Mine of Xinjiang.
Aiming at the phenomena of deformation,strength deterioration and destabilization of surrounding rock water absorption in soft rock roadway,the experimental study on the characteristics of gaseous water adsorption in the coal-sediment jurassic mudstone samples from the Shajihai Coal Mine in Xinjiang is carried out,and the gas-water adsorption characteristic curve Q-t of mudstone is obtained. Through the nonlinear fitting analysis,the water absorption characteristic equation of mudstone is established,and the evolution law of gaseous water adsorption rate is analyzed. Combined with the results of scanning electron microscopy and X-ray diffraction experiments,the effects of physical parameters such as minerals,clay minerals and microstructure on the adsorption characteristics of mudstone gaseous water are discussed. Results show that:( 1) The adsorption characteristics and variation of gaseous water in the five mudstone samples are similar,and the water absorption is positively correlated with the water absorption time. According to the water absorption characteristic equation,the water absorption rate is negatively correlated with the water absorption time.( 2) The rate of mudstone samples decreases during the water absorption process,mainly due to the expansion of the inner pore wall surface,the narrowing of the mudstone pore water passage,and the water absorption is hindered.( 3) The montmorillonite and the Yi/Mongolian mixed layer contained in the mudstone have strong hydrophilicity,which indirectly causes the mudstone to have strong ability to adsorb gaseous water. The micro-cracks expand and penetrate under the action of water and multi-stress fields,further reducing the stability of the surrounding rock.The research results has provided a theoretical basis for the study of stability control of soft rock roadway in jurassic strata in Shajihai Coal Mine of Xinjiang.
引文
[1]袁越,付金磊,秦坚,等.高渗压下砂砾层巷道变形稳定性分析[J].矿业工程研究,2018,33(4):22-30.
[2]何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005(16):2803-2813.
[3]杨晓杰,王嘉敏,张民,等.大强煤矿深部巷道围岩吸水软化规律试验研究[J].矿业科学学报,2017,2(5):432-438.
[4]何满潮,邹正盛,邹友峰.软岩巷道工程概论[M].徐州:中国矿业大学出版社,1993.
[5]何满潮,景海河,孙晓明.软岩工程力学[M].北京:科学出版社,2002
[6]何满潮,孙晓明.中国煤矿软岩巷道工程支护设计与施工指南[M].北京:科学出版社,2004.
[7]袁越.沙吉海矿区中生代砂砾层特性及其支护对策[D].北京:中国矿业大学(北京),2013.
[8]何满潮,袁越,王晓雷,等.新疆中生代复合型软岩大变形控制技术及其应用[J].岩石力学与工报,2013,32(3):433-441.
[9]徐智敏,高尚,孙亚军,等,西部典型侏罗系富煤区含水介质条件与水动力学特征[J].煤炭学报,2017,42(2):444-451.
[10]袁越,刘圣.沙吉海煤矿特大型软岩皮带卸载硐室围岩控制对策研究[J].工程研究-跨学科视野中的工程,2017,9(5):446-453.
[11]达瓦,明德巴依尔.新疆某工程的膨胀软岩地质特性及处理[J].西部探矿工程,2008(11):55-57.
[12]Guo H Y,Lei X Y,Zhang Y M,et al. Experimental research on hydrophilic characteristics of natural soft rock at high stress state[J]. International Journal of Mining Science and Technology,2015,25(3):489-495.
[13]Guo H Y,He M C,Sun C H,et al. Hydrophilic and strength-softening characteristics of calcareous shale in deep mines[J].Journal of Rock Mechanics and Geotechnical Engineering,2012,4(4):344-351.
[14]Guo H Y,Li B,Zhang Y M,et al. Hydrophilic characteristics of soft rock in deep mines[J].International Journal of Mining Science and Technology,2015,25(2):177-183.
[15]杨晓杰,王嘉敏,张秀莲,等.深井泥岩吸水软化规律实验研究[J].煤炭技术,2017,36(9):1-3.
[16]张娜,柳龙标,侯东文,等.深部煤矿钙质页岩吸水特征实验研究[J].矿业研究与开发,2014,34(5):10-15.
[17]郭宏云,赵健,柳培玉.深部软岩与水作用后的强度软化特性及化学分析[J].岩石力学与工程学报,2018(s1):3374-3381.
[18]郝耐,张秀莲,王淑鹏,等.敦煌石窟砂岩吸水特性及力学效应试验研究[J].科学技术与工程,2017(12):26-31.
[19]邓华锋,方景成,李建林,等.含水状态对红层软岩力学特性影响机理[J].煤炭学报,2017,42(8):1994-2002.
[20]张娜,赵方方,张毫毫,等.岩石气态水吸附特性及其影响因素实验研究[J].矿业科学学报,2017,2(4):336-347.
[21]张秀莲,杨晓杰,郭宏云,等.敦煌莫高窟支撑体砾岩吸水规律实验研究[J].岩石力学与工程学报,2018,37(4):940-948.
[22]赵杏媛,张有瑜.粘土矿物与粘土矿物分析[M].北京:海洋出版社,1990.
[2]何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005(16):2803-2813.
[3]杨晓杰,王嘉敏,张民,等.大强煤矿深部巷道围岩吸水软化规律试验研究[J].矿业科学学报,2017,2(5):432-438.
[4]何满潮,邹正盛,邹友峰.软岩巷道工程概论[M].徐州:中国矿业大学出版社,1993.
[5]何满潮,景海河,孙晓明.软岩工程力学[M].北京:科学出版社,2002
[6]何满潮,孙晓明.中国煤矿软岩巷道工程支护设计与施工指南[M].北京:科学出版社,2004.
[7]袁越.沙吉海矿区中生代砂砾层特性及其支护对策[D].北京:中国矿业大学(北京),2013.
[8]何满潮,袁越,王晓雷,等.新疆中生代复合型软岩大变形控制技术及其应用[J].岩石力学与工报,2013,32(3):433-441.
[9]徐智敏,高尚,孙亚军,等,西部典型侏罗系富煤区含水介质条件与水动力学特征[J].煤炭学报,2017,42(2):444-451.
[10]袁越,刘圣.沙吉海煤矿特大型软岩皮带卸载硐室围岩控制对策研究[J].工程研究-跨学科视野中的工程,2017,9(5):446-453.
[11]达瓦,明德巴依尔.新疆某工程的膨胀软岩地质特性及处理[J].西部探矿工程,2008(11):55-57.
[12]Guo H Y,Lei X Y,Zhang Y M,et al. Experimental research on hydrophilic characteristics of natural soft rock at high stress state[J]. International Journal of Mining Science and Technology,2015,25(3):489-495.
[13]Guo H Y,He M C,Sun C H,et al. Hydrophilic and strength-softening characteristics of calcareous shale in deep mines[J].Journal of Rock Mechanics and Geotechnical Engineering,2012,4(4):344-351.
[14]Guo H Y,Li B,Zhang Y M,et al. Hydrophilic characteristics of soft rock in deep mines[J].International Journal of Mining Science and Technology,2015,25(2):177-183.
[15]杨晓杰,王嘉敏,张秀莲,等.深井泥岩吸水软化规律实验研究[J].煤炭技术,2017,36(9):1-3.
[16]张娜,柳龙标,侯东文,等.深部煤矿钙质页岩吸水特征实验研究[J].矿业研究与开发,2014,34(5):10-15.
[17]郭宏云,赵健,柳培玉.深部软岩与水作用后的强度软化特性及化学分析[J].岩石力学与工程学报,2018(s1):3374-3381.
[18]郝耐,张秀莲,王淑鹏,等.敦煌石窟砂岩吸水特性及力学效应试验研究[J].科学技术与工程,2017(12):26-31.
[19]邓华锋,方景成,李建林,等.含水状态对红层软岩力学特性影响机理[J].煤炭学报,2017,42(8):1994-2002.
[20]张娜,赵方方,张毫毫,等.岩石气态水吸附特性及其影响因素实验研究[J].矿业科学学报,2017,2(4):336-347.
[21]张秀莲,杨晓杰,郭宏云,等.敦煌莫高窟支撑体砾岩吸水规律实验研究[J].岩石力学与工程学报,2018,37(4):940-948.
[22]赵杏媛,张有瑜.粘土矿物与粘土矿物分析[M].北京:海洋出版社,1990.