含水饱和度影响下砂岩劈裂特性与水岩作用机制

doi:10.13722/j.cnki.jrme.2023.0352

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (4550 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要岩石含水饱和度与水分分布影响劈裂面粗糙度，进而决定断裂面渗流性能和摩擦作用，对分析巷道围岩稳定性和水压致裂增透效果至关重要。通过对不同饱和度(0，25%，50%，75%和100%)砂岩进行核磁共振分析和巴西劈裂试验，并对岩样劈裂面进行三维形貌扫描，研究饱和度对砂岩劈裂特征的影响。研究结果表明：(1) 岩样从干燥到饱和，抗拉强度从3.05 MPa降至0.98 MPa，符合指数函数特征。岩样的硬度从干燥到饱和下降56.6%，高饱和度砂岩塑性增强。(2) 劈裂面分形维数随饱和度增加呈对数型增大。裂隙面粗糙度系数(JRC)随饱和度增高，均值从5.598增至13.306，且非饱和状态JRC表现出明显的离散性。(3) 利用统计学原理量化不同饱和度砂岩劈裂面，发现粗糙度高度、坡度均值和标准差均随饱和度升高增大，坡向则由干燥的均匀分布逐渐趋于集中在270°。饱和程度加大，垂直裂隙增多，劈裂面更加粗糙。(4) 核磁共振分析结果表明，随着吸水饱和度的增加，水由岩样周边向内部运移，岩样内部孔隙润湿量逐渐增加。随着饱和度从25%升高至100%，岩样内部大中孔和微裂隙润湿比例由3%升高至17%，促使岩样生成软弱结构，破坏时由穿晶裂隙逐渐演化为晶间裂隙，导致宏观表现为劈裂面更加粗糙。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	张村1
	2
	3
	王潇杰1
	师旭涛1
	赵毅鑫1
	韩鹏华1
	张通2

关键词 ：岩石力学, 巴西劈裂, 3D形貌扫描, 饱和度, 劈裂面, 粗糙度

Abstract：The water saturation and distribution of rocks affect the roughness of the fracture surface，which in turn determines the seepage performance and friction effect of the fracture surface. It is crucial for analyzing the stability of the surrounding rock of the roadway and the effect of hydraulic fracturing induced permeability enhancement. In this paper，nuclear magnetic resonance analysis and Brazilian splitting experiments are performed on sandstones with different saturations(0，25%，50%，75% and 100%). Three-dimensional morphology scanning of the rock sample splitting surface are also conducted. The effect of saturation on the splitting characteristics of sandstones was studied. The results show that：(1) From dry to saturated，the tensile strength of rock sample decreased from 3.05 MPa to 0.98 MPa，which conforms to the characteristics of Exponential function. Rock hardness decreased by 56.6% from dry to saturated. Plasticity enhances in highly saturated sandstone. (2) Splitting surface fractal dimension increases logarithmically with saturation. With saturation increasing，the mean value of joint roughness coefficient(JRC) increases from 5.598 to 13.306. The unsaturated JRC exhibits significant discrete. (3) The splitting surface of sandstone with different saturations was quantified using statistical principles. It is found that the roughness height，slope mean and standard deviation increase with saturation，while the slope direction gradually tends to be concentrated at 270° from a uniform distribution in drying. The increase in saturation promotes an increase in vertical fractures，ultimately leading to a rougher splitting surface. (4) NMR analysis shows that with water saturation increasing，water is transported from the periphery to the interior of the rock sample，and the pore wetting within the rock samples gradually increases. As the saturation increases from 25% to 100%，the wetting ratio of large and medium pores and microcracks inside the rock sample increases from 3% to 17%，which promotes the formation of weak structures in rock samples. It causes the transgranular cracks gradually evolve into intergranular cracks in splitting test，resulting in a coarser macroscopic appearance of the splitting surface.

Key words： rock mechanics Brazilian splitting tests 3D morphology scanning saturation splitting surfaces roughness

引用本文:

张村1，2，3，王潇杰1，师旭涛1，赵毅鑫1，韩鹏华1，张通2. 含水饱和度影响下砂岩劈裂特性与水岩作用机制[J]. 岩石力学与工程学报, 2024, 43(S2): 3722-3737.
ZHANG Cun1，2，3，WANG Xiaojie1，SHI Xutao1，ZHAO Yixin1，HAN Penghua1，ZHANG Tong2. Splitting characteristics of sandstone under the influence of water saturation and its mechanism of water rock interaction. , 2024, 43(S2): 3722-3737.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0352 或 https://rockmech.whrsm.ac.cn/CN/Y2024/V43/IS2/3722

[1]	沈荣喜，李太训，李红儒，等. 干燥和饱水裂隙砂岩破坏电磁辐射特征研究[J]. 中国矿业大学学报，2020，49(5)：636-645.(SHEN Rongxi，LI Taixun，LI Hongru，et al. Electromagnetic radiation characteristics of dry and saturated pre-cracked sandstone fracturing[J]. Journal of China University of Mining and Technology，2020，49(4)：636-645.(in Chinese))
[2]	熊德国，赵忠明，苏承东，等. 饱水对煤系地层岩石力学性质影响的试验研究[J]. 岩石力学与工程学报，2011，30(5)：998-1 006. (XIONG Deguo，ZHAO Zhongming，SU Chengdong，et al. Experimental study of effect of water-saturated state on mechanical properties of rock in coal measure strata[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(5)：998-1 006.(in Chinese))
[3]	张娜，王水兵，严成钢，等. 基于核磁共振技术的泥岩水化损伤孔隙结构演化试验[J]. 煤炭学报，2019，44(增1)：110-117. (ZHANG Na，WANG Shuibing，YAN Chenggang，et al. Pore structure evolution of hydration damage of mudstone based on NMR technology[J]. Journal of China Coal Society，2019，44(Supp.1)：110-117.(in Chinese))
[4]	LIU C D，CHENG Y，JIAO Y Y，et al. Experimental study on the effect of water on mechanical properties of swelling mudstone[J]. Engineering Geology，2021，295：106448.
[5]	HASHIBA K，FUKUI K. Effect of water on the deformation and failure of rock in uniaxial tension[J]. Rock Mechanics and Rock Engineering，2015，48：1 751-1 761.
[6]	赵明凯，孔德森. 考虑裂隙面粗糙度和开度分形维数的岩石裂隙渗流特性研究[J]. 岩石力学与工程学报，2022，41(10)：1 993-2 002. (ZHAO Mingkai，KONG Desen. Study on seepage characteristics of rock fractures considering fracture surface roughness and opening fractal dimension[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(10)：1 993-2 002.(in Chinese))
[7]	ZHANG Q B，ZHAO J. Effect of loading rate on fracture toughness and failure micromechanisms in marble[J]. Engineering Fracture Mechanics，2013，102：288-309.
[8]	ZHANG C，LI D，WANG C，et al. Effect of confining pressure on shear fracture behavior and surface morphology of granite by the short core in compression test[J]. Theoretical and Applied Fracture Mechanics，2022，121：103506.
[9]	李波波，李建华，杨康，等. 考虑含水率影响的煤岩变形及渗透率模型[J]. 煤炭学报，2019，44(4)：1 076-1 083.(LI Bobo，LI Jianhua，YANG Kang，et al. Deformation and permeability model of coal and rock considering moisture content[J]. Journal of China Coal Society，2019，44(4)：1 076-1 083.(in Chinese))
[10]	CHEN J，LI J，WANG J，et al. Investigation on the characteristics of fracture process zone under cyclic loading：Insights from macro-mesoscopic analysis[J]. Theoretical and Applied Fracture Mechanics，2022，122：103616.
[11]	张纯旺. 废弃矿井采空区覆岩裂隙导通机制及多尺度渗流特性研究[博士学位论文][D]. 太原：太原理工大学，2021.(ZHANG Chunwang. Formation mechanism and multi-scale seepage characteristics of overburden fracture in abandoned coal mine[Ph. D. Thesis][D]. Taiyuan：Taiyuan University of Technology，2021.(in Chinese))
[12]	LI H，QIAO Y，SHEN R，et al. Effect of water on mechanical behavior and acoustic emission response of sandstone during loading process：Phenomenon and mechanism[J]. Engineering Geology，2021，294：106386.
[13]	TANG S. The effects of water on the strength of black sandstone in a brittle regime[J]. Engineering Geology，2018，239：167-178.
[14]	吴宝杨，刘康，郭东明. 矿井水影响下粗砂岩力学性能变化规律研究[J]. 矿业科学学报，2020，5(6)：632-637.(WU Baoyang，LIU Kang，GUO Dongming. Study on the change law of mechanical properties of gritstone under the influence of mine water[J]. Journal of Mining Science and Technology，2020，5(6)：632-637.(in Chinese))
[15]	许江，王晓震，张倩文，等. 不同含水状态凝灰岩损伤演化试验研究[J]. 采矿与安全工程学报，2021，38(6)：1 189-1 197.(XU Jiang，WANG Xiaoxia，ZHANG Qianwen，et al. Experimental study on damage evolution of tuff under different moisture states[J]. Journal of Mining and Safety Engineering，2021，38(6)：1 189-1 197.(in Chinese))
[16]	孙晓明，缪澄宇，姜铭，等. 基于改进西原模型的不同含水率砂岩蠕变试验及理论研究[J]. 岩石力学与工程学报，2021，40(12)：2 411-2 420.(SUN Xiaoming，MIAO Chengyu，JIANG Ming，et al. Experimental and theoretical study on creep behaviors of sandstone with different moisture contents based on modified Nishihara mode[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(12)：2 411-2 420.(in Chinese))
[17]	CHEN P，TANG S，LIANG X，et al. The influence of immersed water level on the short-and long-term mechanical behavior of sandstone[J]. International Journal of Rock Mechanics and Mining Sciences，2021，138：104631.
[18]	TANG S B，YU C Y，HEAP M J，et al. The influence of water saturation on the short-and long-term mechanical behavior of red sandstone[J]. Rock Mechanics and Rock Engineering，2018，51：2 669-2 687.
[19]	赵奎，冉珊瑚，曾鹏，等. 含水率对红砂岩特征应力及声发射特性的影响[J]. 岩土力学，2021，42(4)：899-908.(ZHAO Kui，RAN Shanhu，ZENG Peng，et al. Effect of moisture content on characteristic stress and acoustic emission characteristics of red sandstone[J]. Rock and Soil Mechanics，2021，42(4)：899-908.(in Chinese))
[20]	AZHAR M U，ZHOU H，YANG F，et al. Water-induced softening behavior of clay-rich sandstone in Lanzhou water supply project，China[J]. Journal of Rock Mechanics and Geotechnical Engineering，2020，12(3)：557-570.
[21]	姚强岭，王伟男，杨书懿，等. 含水率影响下砂质泥岩直剪特性及声发射特征[J]. 煤炭学报，2021，46(9)：2 910-2 922.(YAO Qiangling，WANG Weinan，YANG Shuyi，et al. Direct shear and acoustic emission characteristics of sandy mudstone under the effect of moisture content[J]. Journal of China Coal Society，2021，46(9)：2 910- 2 922.(in Chinese))
[22]	SUN H，MA L，FU Y，et al. Infrared radiation test on the influence of water content on sandstone damage evolution[J]. Infrared Physics and Technology，2021，118：103876.
[23]	缪澄宇，杨柳，许永震，等. 基于核磁共振监测的砂岩强度软化试验及微观机制研究[J]. 岩石力学与工程学报，2021，40(11)： 2 189-2 198.(LIAO Chengyu，YANG Liu，XU Yongzhen，et al. Experimental study on strength softening behaviors and micro-mechanisms of sandstone based on nuclear magnetic resonance[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(11)：2 189-2 198.(in Chinese))
[24]	YU C，TANG S，DUAN D，et al. The effect of water on the creep behavior of red sandstone[J]. Engineering Geology，2019，253：64-74.
[25]	李回贵，李化敏，许国胜. 含水率对弱胶结砂岩力学特征的影响规律[J]. 采矿与岩层控制工程学报，2021，3(4)：043029.(LI Huigui，LI Huamin，XU Guosheng. Influence of water content on mechanical characteristics of weakly cemented sandstone[J]. Journal of Mining and Strata Control Engineering，2021，3(4)：043029.(in Chinese))
[26]	汤华，严松，杨兴洪，等. 差异含水率下全风化混合花岗岩抗剪强度与微观结构试验研究[J]. 岩土力学，2022，43(增1)：55-66. (TANG Hua，YAN Song，YANG Xionghong，et al. Shear strength and microstructure od completely decomposed migmatitic granite under different water contents[J]. Rock and Soil Mechanics，2022，43(Supp.1)：55-66.(in Chinese))
[27]	金解放，徐虹，余雄，等. 动荷载和含水率对红砂岩破坏及能耗特性的影响[J]. 岩土力学，2022，43(12)：3 231-3 240.(JIN Jiefang，XU Hong，YU Xiong，et al. Effect of dynamic load and water content on failure and energy dissipation characteristic of red sandstone[J]. Rock and Soil Mechanics，2022，43(12)：3 231-3 240. (in Chinese))
[28]	ZHU J，DENG J，CHEN F，et al. Failure analysis of water-bearing rock under direct tension using acoustic emission[J]. Engineering Geology，2022，299：106541.
[29]	李博，叶鹏进，黄林，等. 干燥与饱和岩石裂隙受压变形与声发射特性研究[J]. 岩土工程学报，2021，43(12)：2 249-2 257.(LI Bo，YE Pengjin，HUANG Lin，et al. Deformation and acoustic emission characteristics of dry and saturated rock fractures[J]. Chinese Journal of Geotechnical Engineering，2021，43(12)：2 249-2 257.(in Chinese))
[30]	夏冬，杨天鸿，徐涛，等. 浸水时间对饱水岩石损伤破坏过程中声发射特征影响的试验[J]. 煤炭学报，2015，40(增2)：337-345. (XIA Dong，YANG Tianhong，XU Tao，et al. Experimental study on AE properties during the damage process of water-saturated rock specimens based on time effect[J]. Journal of China Coal Society，2015，40(Supp.2)：337-345.(in Chinese))
[31]	WANG J，XIE L，XIE H，et al. Effect of layer orientation on acoustic emission characteristics of anisotropic shale in Brazilian tests[J]. Journal of Natural Gas Science and Engineering，2016，36：1 120-1 129.
[32]	AI T，ZHANG R，ZHOU H W，et al. Box-counting methods to directly estimate the fractal dimension of a rock surface[J]. Applied Surface Science，2014，314：610-621.
[33]	LI J，DU Q，SUN C. An improved box-counting method for image fractal dimension estimation[J]. Pattern Recognition，2009，42(11)：2 460-2 469.
[34]	ZHOU，XIE H. Direct estimation of the fractal dimensions of a fracture surface of rock[J]. Surface Review and Letters，2008，10(5)：751-762.
[35]	张亚衡，周宏伟，谢和平. 粗糙表面分形维数估算的改进立方体覆盖法[J].岩石力学与工程学报，2005，24(17)：3 192-3 196.(ZHANG Yaheng，ZHOU Hongwei，XIE Heping. Improved cubic covering method for fractal dimensions of a fracture surface of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 192-3 196.(in Chinese))
[36]	BARTON N，BANDIS S，BAKHTAR K. Strength，deformation and conductivity coupling of rock joints[J]. International Journal of Rock Mechanics and Mining Science and Geomechanics Abstrscts，1985，22(3)：121-140.
[37]	ZHAO Z，LI B，JIANG Y. Effects of fracture surface roughness on macroscopic fluid flow and solute transport in fracture networks[J]. Rock Mechanics and Rock Engineering，2014，47(6)：2 279-2 286.
[38]	LUO S，ZHAO Z，PENG H，et al. The role of fracture surface roughness in macroscopic fluid flow and heat transfer in fractured rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2016，87：29-38.
[39]	CAO R Y，WANG C S，HU C，et al. Experimental investigation of plane shear fracture characteristics of sandstone after cyclic freeze- thaw treatments[J]. Theoretical and Applied Fracture Mechanics，2022，118：103214.
[40]	张庆礼，丁丽华，邵淑芳，等. X射线衍射双峰的Voigt峰形函数拟合[J]. 人工晶体学报，2009，38(2)：330-334.(ZHANG Qingli，DING Lihua，SHAO Shufang，et al. Double-peak fitting of X-ray diffraction by Voigt profile function[J]. Journal of Synthetic Crystals，2009，38(2)：330-334.(in Chinese))
[41]	刘铭晖，董作人，辛国锋，等. 基于Voigt函数拟合的拉曼光谱谱峰判别方法[J]. 中国激光，2017，44(5)：511003-1-511003-6.(LIU Minghui，DONG Zuoren，XIN Guofeng，et al. Discrimination method of Raman spectral peaks based on Voigt function fitting[J]. Chinese Journal of Lasers，2017，44(5)：511003-1-511003-6.(in Chinese))
[42]	YAO Y，LIU D，CHE Y，et al. Petrophysical characterization of coals by low-field nuclear magnetic resonance(NMR)[J]. Fuel，2010，89(7)：1 371-1 380.
[43]	LIU Z，LIU D，CAI Y，et al. Application of nuclear magnetic resonance(NMR) in coalbed methane and shale reservoirs：A review[J]. International Journal of Coal Geology，2020，218：103261.
[44]	ZHANG C，BAI Q，HAN P，et al. Strength weakening and its micromechanism in water-rock interaction，a short review in laboratory tests[J]. International Journal of Coal Science and Technology，2023，10(1)：10.
[45]	CAI X，ZHOU Z，ZANG H，et al. Water saturation effects on dynamic behavior and microstructure damage of sandstone：phenomena and mechanisms[J]. Engineering Geology，2020，276：105760.
[46]	LI H，SHEN R，WANG E，et al. Effect of water on the time-frequency characteristics of electromagnetic radiation during sandstone deformation and fracturing[J]. Engineering Geology，2020，265：105451.
[47]	FU T，TAO X，MICHEL J，et al. Analysis of capillary water imbibition in sandstone via a combination of nuclear magnetic resonance imaging and numerical DEM modeling[J]. Engineering Geology，2021，285：106070.