含裂隙岩石渗流力学特性研究

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摘要岩体中裂隙的存在严重影响着岩体的渗流特性。为了解不同载荷作用对含裂隙岩体渗流性能的影响规律，利用高精度渗流应力耦合三轴试验系统，对含裂隙砂岩和粉砂岩加载及卸载作用下的渗流特性进行试验研究。试验结果表明：(1) 加载试验过程中，随着载荷的增大，试样裂隙隙宽逐渐减小，渗透率随之逐渐减小，渗透率与有效围压呈负指数关系；(2) 卸载过程中，随着载荷的减小，岩石渗透率逐渐回升，但回升路径明显低于原始路径，路径不重合表明试样中裂隙的变形具有塑性变形的特征。根据试验结果，建立渗透率与有效围压的关系式，并确定关系式中的待定参数。在试验及理论研究的基础上，通过数值模拟分析试样裂隙面渗透率及渗流速度的变化规律。

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	于洪丹1
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	杨建平1
	曹俊杰1
	袁克阔1

关键词 ：岩石力学, 含裂隙岩石, 渗透率, 渗流试验, 数值模拟

Abstract：The fractures existed in the rock mass influence the rock permeability significantly. In order to study the impact of different loadings on the permeability of fractured rock，a series of loading and unloading seepage tests were carried out on fractured sandstone and siltstone samples using the high-precision hydro-mechanical coupling test system. The test results show that：(1) Permeability decreased as well as the aperture of the fracture as the inflow pressure increased during the loading tests. (2) The permeability recovered gradually as the hydrostatic pressure decreased during the unloading procedures，but the recover path is lower than the original path. It shows that plastic deformation has occurred for the fractures. Based on the test results，the relationship between permeability and effective confining pressure was established. Moreover，based on the experiments and theory，the permeability and seepage velocity variation of the fracture surface was analyzed through numerical simulation.

Key words： rock mechanics fractured rock permeability seepage tests numerical simulation

引用本文:

于洪丹1，陈飞飞2，陈卫忠1，3，杨建平1，曹俊杰1，袁克阔1. 含裂隙岩石渗流力学特性研究[J]. 岩石力学与工程学报, 2012, 31(S1): 2788-2795.
YU Hongdan1，CHEN Feifei2，CHEN Weizhong1，3，YANG Jianping1，CAO Junjie1，YUAN Kekuo1. RESEARCH ON PERMEABILITY OF FRACTURED ROCK. , 2012, 31(S1): 2788-2795.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/IS1/2788

[1] 蒋宇静，李博，王刚，等. 岩石裂隙渗流特性试验研究的新进展[J]. 岩石力学与工程学报，2008，27(12)：2 377–2 386.(JIANG Yujing，LI Bo，WANG Gang，et al. New advances in experimental study on seepage characteristics of rock fractures[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(12)：2 377–2 386.(in Chinese))

[2] 常宗旭，赵阳升，胡耀青，等. 三维应力作用下单一裂缝渗流规律的理论与试验研究[J]. 岩石力学与工程学报，2004，23(4)：620–624.(CHANG Zongxu，ZHAO Yangsheng，HU Yaoqing，et al. Theoretic and experimental studies on seepage law of single fracture under 3D stresses[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(4)：620–624.(in Chinese))

[3] 曾亿山，卢德唐，曾清红，等. 单裂隙流–固耦合渗流的试验研究[J]. 实验力学，2005，20(1)：10–16.(ZENG Yishan，LU Detang，ZENG Qinghong，et al. Experimental study on coupling of flow-stress within a single fracture[J]. Journal of Experimental Mechanics，2005，20(1)：10–16.(in Chinese))

[4] 刘才华，陈从新. 三轴应力作用下岩石单裂隙的渗流特性[J]. 自然科学进展，2007，17(7)：989–994.(LIU Caihua，CHEN Congxin. The flow properties of single cracked rock under triaxial stress[J]. Progress in Natural Science，2007，17(7)：989–994.(in Chinese))

[5] 许光祥. 裂隙岩体渗流与卸荷力学相互作用及裂隙排水研究[博士学位论文][D]. 重庆：重庆大学，2001.(XU Guangxiang. A study on interaction between seepage flow and unloading mechanics and drainage of fractured rock masses[Ph. D. Thesis][D]. Chongqing：Chongqing University，2001.(in Chinese))

[6] 赵阳升，杨栋，郑少河，等. 三维应力作用下岩石裂缝水渗流物性规律的实验研究[J]. 中国科学：E辑，1999，29(1)：82–86.(ZHAO Yangsheng，YANG Dong，ZHENG Shaohe，et al. Experimental studies on seepage law of fractured rocks under 3D stresses[J]. Science in China：Series E，1999，29(1)：82–86.(in Chinese))

[7] 陈卫忠，于洪丹，贾善坡，等. 双联动软岩渗流–应力耦合流变仪的研制[J]. 岩石力学与工程学报，2009，28(11)：2 176–2 183. (CHEN Weizhong，YU Hongdan，JIA Shanpo，et al. Development of a double linkage triaxial testing machine for hydro-mechanical coupling in soft rock[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(11)：2 176–2 183.(in Chinese))

[8] 郑少河，赵阳升，段康廉. 三维应力作用下天然裂隙渗流规律的实验研究[J]. 岩石力学与工程学报，1999，18(2)：133–136.(ZHENG Shaohe，ZHAO Yangsheng，DUAN Kanglian. An experimental study on the permeability law of natural fracture under 3D stresses[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(2)：133–136.(in Chinese))

[9] LOUIS C. Rock hydraulics in rock mechanics[M]. New York：Springer-Verlag，1974：299–387.

[10] NELSON R A. Fracture permeably in porous reservoirs：experimental and field approach[Ph. D. Thesis][D]. Texas：Department of Geology，Texas A and M University，1975.

[11] WALSH J B. Effect of pore pressure and confining pressure on fracture permeability[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1981，18(5)：429–435.

[12] 梁宁慧，刘新荣，包太，等. 岩体卸荷渗流特性的试验[J]. 重庆大学学报：自然科学版，2005，28(10)：133–135.(LIANG Ninghui，LIU Xinrong，BAO Tai，et al. Experimental study on the characteristic of seepage with unloading rock mass[J]. Journal of Chongqing University：Natural Science，2005，28(10)：133–135.(in Chinese))

[13] KRANZ R L，FRANKEL S D，ENGELDER T，et al. The permeability of whole and jointed Barre granite[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1979，16(4)：225–234.

[14] 贺玉龙，陶玉敬，杨立中. 不同节理粗糙度系数单裂隙渗流特性试验研究[J]. 岩石力学与工程学报，2010，29(增1)：3 235–3 241.(HE Yulong，TAO Yujing，YANG Lizhong. Experimental research on hydraulic behaviors in a single joint with various values of JRC[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.1)：3 235–3 241.(in Chinese))

[15] 张鹏，李宁，陈新民. 一种新的裂隙三维表面粗糙度表征方法[J]. 岩石力学与工程学报，2009，28(增2)：3 477–3 483. (ZHANG Peng，LI Ning，CHEN Xinmin. A new representation method for three-dimensional surface roughness of rock fracture[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp. 2)：3 477–3 483.(in Chinese))