裂隙(孔隙)水冻结过程中岩石细观结构变化的实验研究

doi:10.13722/j.cnki.jrme.2016.0906

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摘要研究岩石在低温冻结过程中细观结构的变化和孔隙(裂隙)水的冻结过程，对于深化认识冻结岩石的力学及损伤特性具有重要意义。通过开展不同冻结温度下岩石细观结构CT扫描实验，获得了岩样在20 ℃，－2 ℃，
－5 ℃，－10 ℃，－20 ℃，－30 ℃时细观结构的CT图像。采用Canny算子对冻结岩石CT图像进行边缘检测，完成了冻结过程中岩石二维细观结构的识别。基于体视学理论，提出表征冻结岩石细观结构特征参数的计算公式，分析了孔隙(裂隙)水冻结过程中岩石细观结构的变化，实现了冻结过程中岩样不同截面裂隙(孔隙)的长度、宽度、面积及圆形度等参数变化规律的定量分析。分析结果表明：在0 ℃～－2 ℃区间，岩样扫描层面内裂隙(孔隙)的长度、宽度、面积快速增加，这一阶段为宏观裂隙中体积水结冰阶段，裂隙(孔隙)的扩张由体积膨胀机制引起；在－2 ℃～－5 ℃区间，裂隙(孔隙)的扩张速率明显降低，该阶段为细观(部分微观)裂隙(孔隙)中水的结冰过程；在－5 ℃～－20 ℃区间，裂隙(孔隙)的扩张速率又开始增加，但低于0 ℃～－2 ℃区间的增加速率，该阶段为微观裂隙(孔隙)中的水向冰晶体迁移阶段，由分凝冰机制引起裂隙的扩张。

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	刘慧1
	杨更社1
	贾海梁1
	叶万军1
	魏尧1
	奚家米1
	申艳军1
	张慧梅2

关键词 ：岩石力学, 冻结岩石, 温度梯度, CT图像, 细观结构

Abstract：Studying the change of meso-structure of rock during freezing has great significance for deepening the understanding of the mechanical and damage characteristics of frozen rock. The CT images of the meso-structure of rock at different freezing temperature gradients were obtained. The edge of CT images of frozen rock was detected using the Canny operator and two-dimentional meso-structure of rock during freezing was identificated. The composition and relationship of the meso-structure for frozen rock were analyzed based on the theory of stereo vision. The formula for calculating the characteristic parameters of meso-structure of frozen rock were presented. The variation of lengths，widths，areas and roundness for the pores and cracks were analyzed quantitatively during the process of freezing. The length，width and area of cracks (pores) were found to be rapidly increased in the temperature range of 0 ℃ to －2 ℃ due to the volume expansion of freezing water in the macroscopic cracks. The expansion rate of cracks (pores) was significantly reduced in the temperature range of －2 ℃ to －5 ℃. In this stage, It is deduced that the freezing process of the water in the meso-cracks (pores) (or partly micro) occurred. The expansion of the cracks (pores) increased again in the temperature range of －5 ℃ to －20 ℃，but with a lower rate than in temperature range of 0 ℃ to －2 ℃. In this stage the water in the micro cracks(pores) was transformed into the ice crystals.

Key words： rock mechanics frozen rock temperature gradient CT image meso-structure

引用本文:

刘慧1，杨更社1，贾海梁1，叶万军1，魏尧1，奚家米1，申艳军1，张慧梅2. 裂隙(孔隙)水冻结过程中岩石细观结构变化的实验研究[J]. 岩石力学与工程学报, 2016, 35(12): 2516-2524.
LIU Hui1，YANG Gengshe1，JIA Hailiang1，YE Wanjun1，WEI Yao1，XI Jiami1，SHEN Yanjun1，ZHANG Huimei2. Experimental study on meso-structure of rock in the process of crack(pore) water freezing. , 2016, 35(12): 2516-2524.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0906 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/I12/2516

[1]	刘泉声，黄诗冰，康永水. 裂隙岩体冻融损伤研究进展与思考[J]. 岩石力学与工程学报，2015，34(3)：452-471.(LIU Quansheng，HUANG Shibing，KANG Yongshui. Advance and review on freezing-thawing damage of fractured rock[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：452-471.(in Chinese))
[2]	曹志远，傅志平. 材料细观结构与构件宏观响应间直接关联分析[J].上海力学，1996，17(4)：313-318.(CAO Zhiyuan，FU Zhiping. Related analysis between mesostructure of material and macroscopic response of structural member[J]. Journal of Shanghai Mechanics，1996，17(4)：313-318.(in Chinese))
[3]	孟召平，彭苏萍，傅继彤. 含煤岩系岩石力学性质控制因素探讨[J].岩石力学与工程学报，2002，21(1)：102-106.(MENG zhaoping，PENG suping，FU Jitong. Discussion on controlling factors of rock mechanical properties of coal bearing rock series[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(1)：102-106.(in Chinese))
[4]	孟召平，彭苏萍，屈洪亮. 煤层顶底板岩石成分和结构与其力学性质的关系[J]. 岩石力学与工程学报，2000，19(2)：136-139.(MENG Zhaoping，PENG Suping，QU Hongliang. The relationship between composition and texture of sedimentary rock and its mechanical properties in the roof and floor[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(2)：136-139.(in Chinese))
[5]	陈沙，岳中琦，谭国焕. 基于真实细观结构的岩土工程材料三维数值分析方法[J]. 岩石力学与工程学报，2006，25(10)：1 951- 1 959.(CHEN Sha，YUE Zhongqi，THAM L G. Actual mesostructure based three-dimensional numerical modeling method for heterogeneous geomaterials[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(10)：1 951-1 959.(in Chinese))
[6]	P?IKRYL R. Some microstructural aspects of strength variation in rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2001，(38)：671-682. " target="_blank">
[7]	JOHANSSON E. Technological properties of rock aggregates[Ph. D. Thesis][D]. Luleå：Luleå University of Technology，2011. " target="_blank">
[8]	张文杰，曾远，缪宁. 岩石均匀度对岩石本构关系影响的细观模拟研究[J]. 华北水利水电学院学报，2007，28(6)：60-62.(ZHANG Wenjie，ZENG Yuan，MIU Ning. Study on the influence of the Heterogeneity of rock on stress-strain relation of rock in the mesomechanical scale[J]. Journal of North China Institute of Water Conservancy and Hydroelectric Power，2007，28(6)：60-62.(in Chinese))
[9]	许尚杰，尹小涛，党发宁. 晶体及矿物颗粒大小对岩土材料力学性质的影响[J]. 岩土力学，2009，30(9)：2 581-2 587.(XU Shangjie，YIN Xiaotao，DANG Faning. Mechanical characteristics of rock and soil affected by particle size of crystal and mineral[J]. Rock and Soil Mechanics，2009，30(9)：2 581-2 587.(in Chinese))
[10]	徐金明，谢芝蕾，贾海涛. 石灰岩细观力学特性的颗粒流模拟[J]. 岩土力学，2010，31(增2)：390-395.(XU Jinming，XIE Zhilei，JIA Haitao. Simulation of mesomechanical properties of limestone using particle flow code[J]. Rock and Soil Mechanics，2010，31(Supp.2)：390-395.(in Chinese))
[11]	于庆磊，杨天鸿，郑超，等. 岩石细观结构对其变形强度影响的数值分析[J]. 岩土力学，2011，32(11)：3 468-3 472.(YU Qinglei，YANG Tianhong，ZHENG Chao，et al. Numerical analysis of influence of rock mesostructure on its deformation and strength[J]. Rock and Soil Mechanics，2011，32(11)：3 468-3 472.(in Chinese))
[12]	杨永明，鞠杨，陈佳亮，等. 温度作用对孔隙岩石介质力学性能的影响[J]. 岩土工程学报，2013，35(5)：856-864.(YANG Yongming，JU Yang，CHEN Jialiang，et al. Mechanical properties of porous rock media subjected to temperature effect[J]. Chinese Journal of Geotechnical Engineering，2013，35(5)：856-864.(in Chinese))
[13]	杨永明，鞠杨，王会杰. 孔隙岩石的物理模型与破坏力学行为分析[J]. 岩土工程学报，2013，32(5)：736-744.(YANG Yongming，JU Yang，WANG Huijie. Physical model and failure analysis of porous rock[J]. Chinese Journal of Geotechnical Engineering，2013，32(5)：736-744.(in Chinese))
[14]	赵斌，王芝银，伍锦鹏. 矿物成分和细观结构与岩石材料力学性质的关系[J]. 煤田地质与勘探，2013，41(3)：59-63.(ZHAO Bin，WANG Zhiyin，WU Jinpeng. Relation between mineralogical composition and microstructure to the mechanical properties of rock materials[J]. Coal Geology and Exploration，2013，41(3)：59-63.(in Chinese))
[15]	王章琼，晏鄂川. 物质组构特征对片岩冻融损伤劣化的影响[J]. 岩土工程学报，2015，37(增2)：86-90.(WANG Zhangqiong，YAN Echuan. Influence of material composition and structural characteristics of rock on freeze-thaw damage and deterioration of schist[J]. Chinese Journal of Geotechnical Engineering，2015，37(Supp.2)：86-90.(in Chinese))
[16]	马中高. 成岩作用和岩石结构对砂岩弹性速度的影响[J]. 石油学报，2008，29(1)：58-63.(MA Zhonggao. Effects of diagenesis and rock texture on elastic velocity of sandstones[J]. Acta Petrolei Sinica，2008，29(1)：58-63.(in Chinese))
[17]	蔡承政，李根生，黄中伟，等. 液氮冻结条件下岩石孔隙结构损伤试验研究[J]. 岩土力学，2014，35(4)：965-971.(CAI Chengzheng，LI Gensheng，HUANG Zhongwei，et al. Experiment study of rock porous structure damage under cryogenic nitrogen freezing[J]. Rock and Soil Mechanics，2014，35(4)：965-971.(in Chinese))
[18]	唐明明，王芝银，孙毅力. 低温条件下花岗岩力学特性试验研究[J]. 岩石力学与工程学报，2010，29(4)：787-794.(TANG Mingming，WANG Zhiyin，SUN Yili. Experimental study of mechanical properties of granite under low temperature[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：787-794.(in Chinese))
[19]	刘莹，汪仁和，陈军浩. 负温下白垩系岩石的物理力学性能试验研究[J]. 煤炭工程，2011，(1)：82-84.(LIU Ying，WANG Renhe，CHEN Junhao. Experiment study on physical mechanics perform ances of cretaceous system rock under minus temperature[J]. Coal Engineering，2011，(1)：82-84.(in Chinese))
[20]	李云鹏，王芝银. 花岗岩低温强度参数与冰胀力的关系研究[J]. 岩石力学与工程学报，2010，29(2)：4 113-4 118.(LI Yunpeng，WANG Zhiyin. Study of relationship between strength parameters and ice expansion force of granite under low temperature[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：4 113-4 118.(in Chinese))
[21]	宋立伟. 西北地区冻结岩石力学特性及爆破损伤评价模型试验研究[博士学位论文][D]. 北京：中国矿业大学，2014.(SONG Liwei. Model test study of mechanical properties and damage evaluation of froze rock under blasting load in Northwest China[Ph. D. Thesis][D]. Beijing：China University of Mining and Technology，2014.(in Chinese)) " target="_blank">
[22]	杨更社，张全胜，蒲毅彬. 冻结温度影响下岩石细观损伤演化CT扫描[J]. 长安大学学报：自然科学版，2004，24(6)：40-42.(YANG Gengshe，ZHANG Quansheng，PU Yibin. CT scanning test of mesodamage propagation an University?of rock under different freezing temperatures[J]. Journal of Chang?an University：Natural Science，2004，24(6)：40-42.(in Chinese))
[23]	李杰林，周科平，张亚民，等. 基于核磁共振技术的岩石孔隙结构冻融损伤试验研究[J]. 岩石力学与工程学报，2012，31(6)：1 208- 1 214.(LI Jielin，ZHOU Keping，ZHANG Yamin，et al. Experimental study of rock porous structure damage characteristics under condition of freezing-thawing cycles based on nuclear magnetic resonance technique[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(6)：1 208-1 214.(in Chinese))
[24]	JIA H L，XIANG W. Direct observation of the pore structure of sandstone after repeated frost action[J]. Electronic Journal of Geotechnical Engineering，2015，20(16)：11 611-11 624. " target="_blank">
[25]	FUKUDA M. Freezing-thawing process of water in pore space of rocks[J]. Low Temperature Science，SeriesA，1971，29：225-229. " target="_blank">
[26]	HALLET B，WALDER J S，STUBBS C W. Weathering by segregation ice growth in microcracks at sustained subzero temperatures：Verification from an experimental study using acoustic emissions[J]. Permafrost and Periglacial Processes，1991，2(4)：283-300. " target="_blank">
[27]	MELLOR M. Phase composition of pore water in cold rocks[R]. [S. l.]：Research Report of CRREL，1970. " target="_blank">
[28]	贾海梁. 多孔岩石及裂隙岩体冻融损伤机制的理论模型和试验研究[博士学位论文][D]. 武汉：中国地质大学，2016.(JIA Hailiang. Theoretical damage models of porous rocks and hard jointed rocks subjected to frost action and further experimental verifications[Ph. D. Thesis][D]. Wuhan：China University of Geosciences，2016.(in Chinese)) " target="_blank">
[29]	KENNETH R C. Digital image processing[M]. Beijing：Publishing House of Electronics Industry，2011：85-91. " target="_blank">
[30]	NEMATI K M. Preserving microstructure of concrete under load using the Wood?s，Metal technique[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37：133-142. " target="_blank">
[31]	NEMATI GK M，STROEVEN P. Stereological analysis of micormechanical behavior of concrete[J]. Materials and Structures，200l，242(34)：486-494. " target="_blank">
[32]	MELLOR M. Phase composition of pore water in cold rocks[R]. [S.l.]：Research Report of CRREL，1970. " target="_blank">
[33]	贾海梁，项伟，谭龙，等. 砂岩冻融损伤机制的理论分析和试验验证[J]. 岩石力学与工程学报，2016，35(5)：879-895.(JIA Hailiang，XIANG Wei，TAN Long，et al. Theoretical analysis and experimental verifications of frost damage mechanism of sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(5)：879-895.(in Chinese))