泥岩耐崩解性与矿物组成相关性的试验研究
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摘要
岩石的耐崩解性是岩土工程实践中岩体和岩石材料的重要特征参数之一。基于4组不同成煤期煤系地层泥岩的耐崩解性对比试验,结合岩样的X射线衍射(XRD)和压汞试验(MIP)分析结果,研究了循环崩解作用下泥岩崩解物形态特征和耐崩解性指数的变化规律,并探讨了泥岩耐崩解性差异、差异产生机理及其与矿物组成的关系。研究结果表明:泥岩的耐崩解性与其矿物组成和孔裂隙结构特征密切相关;随崩解循环次数的增多,泥岩耐崩解性指数呈负指数关系递减;受矿物组成的影响,泥岩崩解机理可分为两类:矿物组成中含有蒙脱石的,崩解主要由岩体遇水时内部差异膨胀引起;矿物组成中不含蒙脱石的,崩解主要由岩体遇水时内部孔裂隙相界面受水的楔裂压力作用,孔裂隙扩容引起。
Slake durability of rocks is an important property of rock-mass and rock-material in geotechnical practice.Based on the slake durability comparison test of four groups mudstone from the coal measure strata of different coalforming periods,and by combining the results of X-ray diffraction( XRD) and mercury injection test( MIP),the variation of shape and size of slaking pieces and slake durability index of mudstone under cycles slaking were studied. The difference of mudstone slake durability,its mechanism and its relationship with mineral composition were discussed.The research results are as follows: the slake durability of mudstone is closely related to their mineral composition and pore-fracture characteristics. The decrease of mudstone slake durability index follows a negative exponent relationship with the increase of slaking cycle times. The slaking mechanism of mudstone can be divided into two classes. When the mineral composition of rock contains montmorillonite,the rock slaking is resulted from block swelling difference caused by montmorillonite expansion in water. When the mineral composition of rock does not contain montmorillonite,the rock slaking is resulted from inner pore-fracture expansion caused by tension from water squeezing air in pore-fracture.
Slake durability of rocks is an important property of rock-mass and rock-material in geotechnical practice.Based on the slake durability comparison test of four groups mudstone from the coal measure strata of different coalforming periods,and by combining the results of X-ray diffraction( XRD) and mercury injection test( MIP),the variation of shape and size of slaking pieces and slake durability index of mudstone under cycles slaking were studied. The difference of mudstone slake durability,its mechanism and its relationship with mineral composition were discussed.The research results are as follows: the slake durability of mudstone is closely related to their mineral composition and pore-fracture characteristics. The decrease of mudstone slake durability index follows a negative exponent relationship with the increase of slaking cycle times. The slaking mechanism of mudstone can be divided into two classes. When the mineral composition of rock contains montmorillonite,the rock slaking is resulted from block swelling difference caused by montmorillonite expansion in water. When the mineral composition of rock does not contain montmorillonite,the rock slaking is resulted from inner pore-fracture expansion caused by tension from water squeezing air in pore-fracture.
引文
[1]孟召平,彭苏萍.煤系泥岩组分特征及其对岩石力学性质的影响[J].煤田地质与勘探,2004,32(2):14-16.Meng Zhaoping,Peng Suping.Mudstone composition of coal measures and its influence on the mechanical properties[J].Coal Geology&Exploration,2004,32(2):14-16.
[2]周翠英,邓毅梅,谭祥韶,等.饱水软岩力学性质软化的试验研究与应用[J].岩石力学与工程学报,2005,24(1):33-38.Zhou Cuiying,Deng Yimei,Tan Xiangshao,et al.Experimental research on the softening of mechanical properties of saturated soft rock and application[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(1):33-38.
[3]Erguler Z A,Ulusay R.Water-induced variations in mechanical properties of clay-bearing rocks[J].International Journal of Rock Mechanics and Mining Sciences,2009,46(2):355-370.
[4]Chai Zhaoyun,Kang Tianhe,Chen Weiyi.Effects of organic silicone additive material on physical and mechanical properties of mudstone[J].Geomechanics and Engineering,2014,6(2):139-151.
[5]何满潮,周莉,李德健,等.深井泥岩吸水特性试验研究[J].岩石力学与工程学报,2008,27(6):1113-1120.He Manchao,Zhou Li,Li Dejian,et al.Experimental research on hydrophilic characteristics of mudstone in deep well[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(6):1113-1120.
[6]柴肇云,郭卫卫,康天合,等.水化学环境变化对泥岩胀缩性的影响[J].岩石力学与工程学报,2013,32(2):281-288.Chai Zhaoyun,Guo Weiwei,Kang Tianhe,et al.Effect of aqueous environmental chemistry change on swell-shrink property of argillaceous rock[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):281-288.
[7]柴肇云,张鹏,郭俊庆,等.泥岩膨胀各向异性与循环胀缩特征[J].岩土力学,2014,35(2):346-350.Chai Zhaoyun,Zhang Peng,Guo Junqing,et al.Swelling anisotropy and cyclic swelling-shrinkage of the argillaceous rock[J].Rock and Soil Mechanics,2014,35(2):346-350.
[8]Wakim J,Hadj-hassen F,De Windt L.Effect of aqueous solution chemistry on the swelling and shrinkage of the Tournemire shale[J].International Journal of Rock Mechanics and Mining Sciences,2009,46(8):1378-1382.
[9]柴肇云,康天合,李义宝.物化型软岩微结构单元特征及其胀缩性研究[J].岩石力学与工程学报,2006,25(6):1265-1269.Chai Zhaoyun,Kang Tianhe,Li Yibao.Study on microstructure unit character and its swell-shrink property for physico-chemical soft rock[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(6):1265-1269.
[10]Montes H G,Duplay J,Martinez L,et al.Structural modifications of Callovo-Oxfordian argillite under hydration/dehydration conditions[J].Apply Clay Science,2004,25(3/4):187-194.
[11]Gorkum A G,Martin C D.The mechanical behaviour of weak mudstone(Opalinus clay)at low stresses[J].International Journal of Rock Mechanics and Mining Sciences,2007,44(2):196-209.
[12]Pejon O J,Zuquette L V.Analysis of cyclic swelling of mudrocks[J].Engineering Geology,2002,67(1/2):97-108.
[13]Wong R C K,Wang E Z.Three-dimensional anisotropic swelling model for clay shale—A fabric approach[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(2):187-198.
[14]Pejon O J,Zuquette L V.Effects of strain on the swelling pressure of mudrocks[J].International Journal of Rock Mechanics and Mining Sciences,2006,43(5):817-825.
[15]Doostmohammadi R,Moosavi M,Araabi B N.A model for determining the cyclic swell-shrink behavior of argillaceous rock[J].Apply Clay Science,2008,42(1/2):81-89.
[16]刘长武,陆士良.泥岩遇水崩解软化机理的研究[J].岩土力学,2000,21(1):28-31.Liu Changwu,Lu Shiliang.Research on mechanism of mudstone degradation and softening in water[J].Rock and Soil Mechanics,2000,21(1):28-31.
[17]Ganesh D,Tesuro Y,Masaji K,et al.Slake durability and mineralogical properties of some pyroclastic and sedimentary rocks[J].Engineering Geology,2002,65:31-45.
[18]张巍,尚彦军,曲永新,等.泥质膨胀岩崩解物粒径分布与膨胀性关系试验研究[J].岩土力学,2013,34(1):66-72.Zhang Wei,Shang Yanjun,Qu Yongxin,et al.Grain size distribution of collapsed scraps of argillaceous rock and its relationship with expansibility:An experimental study[J].Rock and Soil Mechanics,2013,34(1):66-72.
[19]康天合,柴肇云,王栋,等.物化型软岩块体崩解特性差异的试验研究[J].煤炭学报,2009,34(7):907-911.Kang Tianhe,Chai Zhaoyun,Wang Dong,et al.Experimental study on block disintegration difference of physicochemical soft rock[J].Journal of China Coal Society,2009,34(7):907-911.
[20]GB/T 23561.16—2010,煤和岩石物理力学性质测定方法[S].
[2]周翠英,邓毅梅,谭祥韶,等.饱水软岩力学性质软化的试验研究与应用[J].岩石力学与工程学报,2005,24(1):33-38.Zhou Cuiying,Deng Yimei,Tan Xiangshao,et al.Experimental research on the softening of mechanical properties of saturated soft rock and application[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(1):33-38.
[3]Erguler Z A,Ulusay R.Water-induced variations in mechanical properties of clay-bearing rocks[J].International Journal of Rock Mechanics and Mining Sciences,2009,46(2):355-370.
[4]Chai Zhaoyun,Kang Tianhe,Chen Weiyi.Effects of organic silicone additive material on physical and mechanical properties of mudstone[J].Geomechanics and Engineering,2014,6(2):139-151.
[5]何满潮,周莉,李德健,等.深井泥岩吸水特性试验研究[J].岩石力学与工程学报,2008,27(6):1113-1120.He Manchao,Zhou Li,Li Dejian,et al.Experimental research on hydrophilic characteristics of mudstone in deep well[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(6):1113-1120.
[6]柴肇云,郭卫卫,康天合,等.水化学环境变化对泥岩胀缩性的影响[J].岩石力学与工程学报,2013,32(2):281-288.Chai Zhaoyun,Guo Weiwei,Kang Tianhe,et al.Effect of aqueous environmental chemistry change on swell-shrink property of argillaceous rock[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):281-288.
[7]柴肇云,张鹏,郭俊庆,等.泥岩膨胀各向异性与循环胀缩特征[J].岩土力学,2014,35(2):346-350.Chai Zhaoyun,Zhang Peng,Guo Junqing,et al.Swelling anisotropy and cyclic swelling-shrinkage of the argillaceous rock[J].Rock and Soil Mechanics,2014,35(2):346-350.
[8]Wakim J,Hadj-hassen F,De Windt L.Effect of aqueous solution chemistry on the swelling and shrinkage of the Tournemire shale[J].International Journal of Rock Mechanics and Mining Sciences,2009,46(8):1378-1382.
[9]柴肇云,康天合,李义宝.物化型软岩微结构单元特征及其胀缩性研究[J].岩石力学与工程学报,2006,25(6):1265-1269.Chai Zhaoyun,Kang Tianhe,Li Yibao.Study on microstructure unit character and its swell-shrink property for physico-chemical soft rock[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(6):1265-1269.
[10]Montes H G,Duplay J,Martinez L,et al.Structural modifications of Callovo-Oxfordian argillite under hydration/dehydration conditions[J].Apply Clay Science,2004,25(3/4):187-194.
[11]Gorkum A G,Martin C D.The mechanical behaviour of weak mudstone(Opalinus clay)at low stresses[J].International Journal of Rock Mechanics and Mining Sciences,2007,44(2):196-209.
[12]Pejon O J,Zuquette L V.Analysis of cyclic swelling of mudrocks[J].Engineering Geology,2002,67(1/2):97-108.
[13]Wong R C K,Wang E Z.Three-dimensional anisotropic swelling model for clay shale—A fabric approach[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(2):187-198.
[14]Pejon O J,Zuquette L V.Effects of strain on the swelling pressure of mudrocks[J].International Journal of Rock Mechanics and Mining Sciences,2006,43(5):817-825.
[15]Doostmohammadi R,Moosavi M,Araabi B N.A model for determining the cyclic swell-shrink behavior of argillaceous rock[J].Apply Clay Science,2008,42(1/2):81-89.
[16]刘长武,陆士良.泥岩遇水崩解软化机理的研究[J].岩土力学,2000,21(1):28-31.Liu Changwu,Lu Shiliang.Research on mechanism of mudstone degradation and softening in water[J].Rock and Soil Mechanics,2000,21(1):28-31.
[17]Ganesh D,Tesuro Y,Masaji K,et al.Slake durability and mineralogical properties of some pyroclastic and sedimentary rocks[J].Engineering Geology,2002,65:31-45.
[18]张巍,尚彦军,曲永新,等.泥质膨胀岩崩解物粒径分布与膨胀性关系试验研究[J].岩土力学,2013,34(1):66-72.Zhang Wei,Shang Yanjun,Qu Yongxin,et al.Grain size distribution of collapsed scraps of argillaceous rock and its relationship with expansibility:An experimental study[J].Rock and Soil Mechanics,2013,34(1):66-72.
[19]康天合,柴肇云,王栋,等.物化型软岩块体崩解特性差异的试验研究[J].煤炭学报,2009,34(7):907-911.Kang Tianhe,Chai Zhaoyun,Wang Dong,et al.Experimental study on block disintegration difference of physicochemical soft rock[J].Journal of China Coal Society,2009,34(7):907-911.
[20]GB/T 23561.16—2010,煤和岩石物理力学性质测定方法[S].