砂质泥岩在低温劈裂试验中的声发射研究

doi:10.13722/j.cnki.jrme.2014.1747

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摘要砂质泥岩在低温环境中的物理力学特性和损伤破坏对于西部富水深部竖井工程建设有重要的研究意义。依托内蒙古鄂尔多斯梅林庙矿区工程，选取深约690 m的砂质泥岩为母材，研究3种温度(26 ℃，－10 ℃，－20 ℃) 下砂质泥岩在巴西劈裂试验中的力学特性，并运用声发射仪，选取声发射能量、幅度以及峰值频率参数，分析其在不同温度试验中的变化规律。结果表明，温度对于砂质泥岩的劣化影响明显，－20 ℃时砂质泥岩的劈裂强度较常温及－10 ℃时分别减少了37.47%和29.2%。常温下砂质泥岩加载初期存在裂隙压密过程。声发射3个参数在试验过程中的变化相互验证，可以描述岩石破坏的全过程。基于累计声发射能量的损伤演化较好反映了岩石内部裂隙产生–扩展–汇集–贯通–破坏的过程，为人工冻结工程中损伤程度的评估以及预防冻结过程中渗水淹井问题提供了新的思路。

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	刘波1
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	张功1
	李守定3
	李晓3
	徐薇1
	杨伟红1

关键词 ：岩石力学, 冻结岩石, 巴西劈裂试验, 声发射能量, 声发射幅度, 峰值频率

Abstract：The physical-mechanical properties and the damage mechanism of frozen sandy mudstone in the low temperature are significant to the deep shaft construction in water-rich western China. Based on Meilin Temple mining projects in Ordos of Inner Mongolia，sandy mudstone in depth of more than 690 meters is selected to study Brazilian splitting tests under three different temperatures. Furthermore，acoustic emission apparatus is utilized to monitor the changes of AE energy，acoustic emission(AE) amplitude and peak frequency during the tests with the increase of load. The results show that temperature is critical to the degradation effect of sandy mudstone，and the splitting tensile strength of －20 ℃ sandy mudstone reduces by 37.47% and 29.2%，compared with samples at room temperature and －10 ℃，respectively. The phenomenon of crack compaction is found in early loading period at room temperature，and the changes of three different kinds of AE parameters verifies each other during the tests and the whole damage process of sandy mudstone can be described. The damage evolution based on cumulative AE energy reflects the process of internal fracture generation-propagation-transfixion -failure，which is used to evaluate the damage degree of frozen sandy mudstone and to afford a new thought for the real problems of seepage and mine flooding in actual artificial freezing engineering.

Key words： rock mechanics frozen rock Brazilian splitting test acoustic emission(AE) energy acoustic emission(AE) amplitude peak frequency

引用本文:

刘波1，2，张功1，李守定3，李晓3，徐薇1，杨伟红1. 砂质泥岩在低温劈裂试验中的声发射研究[J]. 岩石力学与工程学报, 2016, 35(S1): 2702-2709.
LIU Bo1，2，ZHANG Gong1，LI Shouding3，LI Xiao3，XU Wei1，YANG Weihong1. Acoustic emission study on frozen sandy mudstone in Brazilian splitting test. , 2016, 35(S1): 2702-2709.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.1747 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS1/2702

[1] 崔广心. 深土冻土力学——冻土力学发展的新领域[J]. 冰川冻土，1998，20(2)：97–100.(CUI Guangxin. Mechanics of frozen soil for deep alluvium-a new field of frozen soil mechanics[J]. Journal of Glaciology and Geocryology，1998，20(2)：97–100.(in Chinese))

[2] LI N，CHEN B，CHEN F X，et al. The coupled heat-moisture- mechanic model of the frozen soil[J]. Cold Regions Science and Technology，2000，31(3)：199–205.

[3] LAI Y M，LI J B，LI Q Z. Study on damage statistical constitutive model and stochastic simulation for warm ice-rich frozen silt[J]. Cold Regions Science and Technology，2012，71(2)：102–110.

[4] 张慧梅，杨更社. 冻融环境下红砂岩力学特性试验及损伤分析[J]. 力学与实践，2013，(03)：57–61.(ZHANG Huimei，YANG Gengshe. Mechanical property experiment and damage analysis of red sandstone under freeze-thaw environment[J]. Mechanics in Engineering，2013，35(3)：57–61.(in Chinese))

[5] LIU B，LI D Y. A simple test method to measure unfrozen water content in clay-water systems[J]. Cold Regions Science and Technology，2012，78(4)：97–106.

[6] 杨更社，谢定义，张长庆，等. 岩石损伤特性的CT识别[J]. 岩石力学与工程学报，1996，15(01)：48–54.(YANG Gengshe，XIE Dingyi，ZHANG Changqing，et al. CT identification of rock damage properties[J]. Chinese Journal of Rock Mechanics and Engineering，1996，15(1)：48–54.(in Chinese))

[7] 杨更社，张全胜，蒲毅彬. 冻结温度对岩石细观损伤扩展特性影响研究初探[J]. 岩土力学，2004，25(9)：1 409–1 412.(YANG Gengshe，ZHANG Quansheng，PU Yibin. Preliminary study of meso- damage propagation characteristics of rock under condition of freezing temperature[J]. Rock and Soil Mechanics，2004，25(9)：1 409– 1 412.(in Chinese))

[8] 马静嵘，杨更社. 软岩冻融损伤的水–热–力耦合研究初探[J]. 岩石力学与工程学报，2004，23(增1)：4 373–4 377.(MA Jingrong，YANG Gengshe. Study on liquid-thermal-stress coupling of freezing- thawing damage of soft rock[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(Supp.1)：4 371–4 377.(in Chinese))

[9] 陈卫忠，谭贤君，于洪丹，等. 低温及冻融环境下岩体热、水、力特性研究进展与思考[J]. 岩石力学与工程学报，2011，30(7)：1 318–1 336.(CHEN Weizhong，TAN Xianjun，YU Hongdan，et al. Advance and review on thermo-hydro-mechanical characteristics of rock mass under condition of low temperature and freeze-thaw cycles[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(7)：1 318–1 336.(in Chinese))

[10] 刘泉声，康永水，刘小燕. 冻结岩体单裂隙应力场分析及热–力耦合模拟[J]. 岩石力学与工程学报，2011，30(2)：217–223.(LIU Quansheng，KANG Yongshui，LIU Xiaoyan. Analysis of stress field and coupled thermo-mechanical simulation of single-fracture freezed rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(2)：217–223.(in Chinese))

[11] 康永水，刘泉声，赵军，等. 岩石冻胀变形特征及寒区隧道冻胀变形模拟[J]. 岩石力学与工程学报，2012，31(12)：2 518–2 526. (KANG Yongshui，LIU Quansheng，ZHAO Jun，et al. Research on frost deformation characteristics of rock and simulation of tunnel frost deformation in cold region[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(12)：2 518–2 526.(in Chinese))

[12] KODAMA J，GOTO T，FUJII Y，et al. The effects of water content，temperature and loading rate on strength and failure process of frozen rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2013，62：1–13.

[13] WOO S，KIM J，KIM J，et al. Correlation of fracture processes and damage mechanisms of armor structural materials under high strain rates with acoustic emission characteristics[J]. International Journal of Impact Engineering，2014，63：29–42.

[14] 余贤斌，谢强，李心一，等. 直接拉伸、劈裂及单轴压缩试验下岩石的声发射特性[J]. 岩石力学与工程学报，2007，26(1)：137–142.(YU Xianbin，XIE Qiang，LI Xinyi，et al. Acoustic emission of rocks under direct tension，Brazilian and uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(1)：137–142.(in Chinese))

[15] AMITRANO D，GRUBER S，GIRARD L. Evidence of frost-cracking inferred from acoustic emissions in a high-alpine rock-wall[J]. Earth and Planetary Science Letters，2012，341/344：86–93.

[16] CARPINTERI A，BORLA O，LACIDOGNA G，et al. Neutron emissions in brittle rocks during compression tests：Monotonic vs. cyclic loading[J]. Physical Mesomechanics，2010，13(5/6)：268–274.

[17] ISHIDA T，KANAGAWA T，KANAORI Y. Source distribution of acoustic emissions during an in-situ direct shear test：implications for an analog model of seismogenic faulting in an inhomogeneous rock mass[J]. Engineering Geology，2010，110(3/4)：66–76.

[18] 李术才，许新骥，刘征宇，等. 单轴压缩条件下砂岩破坏全过程电阻率与声发射响应特征及损伤演化[J]. 岩石力学与工程学报，2014，33(1)：14–23.(LI Shucai，XU Xinji，LIU Zhengyu，et al. Electrical resistivituy and acoustic emission response characteristics and damage evolution of sandstone during whole process of uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(1)：14–23.(in Chinese))

[19] 俞缙，李宏，陈旭，等. 砂岩卸围压变形过程中渗透特性与声发射试验研究[J]. 岩石力学与工程学报，2014，33(1)：69–79.(YU Jin，LI Hong，CHEN Xu，et al. Experimental study permeability and acoustic emission characteristics of sandstone during processes of unloading confining pressure and deformation[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(1)：69–79.(in Chinese))

[20] 邓红卫，田维刚，周科平，等. 2001～2012年岩石冻融力学研究进展[J]. 科技导报，2013，31(24)：74–79.(DENG Hongwei，TIAN Weigang，ZHOU Keping，et al. Process in freezing-thawing rock mechanics during the period of 2001 to 2012[J]. Science and Technology Review，2013，31(24)：74–79.(in Chinese))