高渗压条件下基于非达西流的裂隙岩体渗透特性研究

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摘要钻孔高压压水试验是评估高水头条件下岩体渗透特性的主要手段。目前，高水压条件下岩体的渗透特性估算多借鉴基于Darcy流假定的钻孔常规压水试验行业规程推荐公式，尚缺乏成熟、有效的计算方法。基于非线性Izbash定律，建立高渗压条件下岩体渗透系数的估算公式，并将高压压水试验P-Q曲线分为线性段、非线性段和水力劈裂扩展段。提出的公式应用简便，各压水试验段岩体渗透系数的确定只需稳态下的流量和水头，并且表征水流流态的系数m可通过曲线拟合得到。通过对琼中抽水蓄能电站高岔区钻孔高压压水试验数据的研究表明，岩体的渗透特性不受水流流态的影响，在高压压水试验的线性段和非线性段基本保持一致；岩体发生水力劈裂后，岩体的渗透特性将急剧增大。建立的公式可为高渗压条件下岩体的渗透特性取值提供一种有效的途径。

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关键词 ：岩石力学, 渗透特性, 裂隙岩体, 非达西流, 高压压水试验, 声波钻孔电视

Abstract：High pressure packer test(HPPT) is an important field technique for estimating the permeability of rocks subjected to high seepage pressure. Up to now，no effective method has been proposed to estimate the permeability of rocks subjected to high seepage pressure and the estimation is still commonly performed based on the Darcy?s law as assumed in the constant head packer tests(CPTs). A formula for estimating the permeability of rocks through single borehole HPPTs was established based on Izbash?s empirical nonlinear equation between the apparent velocity and the hydraulic gradient. The P-Q curve obtained from HPPTs was divided into a linear，a nonlinear and a hydraulic fracturing stage correspondingly，where P is seepage pressure，and Q is seepage quantity. The proposed formula was validated against the in-situ measured data obtained in HPPTs performed to the surrounding rocks of the underground bifurcated pipe at Qiongzhong pumped storage power station. It was discovered that the permeability of rocks was not influenced by the flow pattern，and the estimated permeabilities in the linear and nonlinear stages basically had the same values. As the hydraulic fracturing occurred，however，the permeability increased drastically. The proposed formula provides an effective method for permeability estimation in rocks subjected to high seepage pressure.

Key words： rock mechanics permeability fractured rock mass non-Darcian flow high pressure packer test acoustic borehole televiewer

收稿日期: 2014-04-28

引用本文:

孟如真1，2，胡少华1，2，陈益峰1，2，周创兵1，2. 高渗压条件下基于非达西流的裂隙岩体渗透特性研究[J]. 岩石力学与工程学报, 2014, 33(09): 1756-1764.
MENG Ruzhen1，2，HU Shaohua1，2，CHEN Yifeng1，2，ZHOU Chuangbing1，2. PERMEABILITY OF NON-DARCIAN FLOW IN FRACTURED ROCK MASS UNDER HIGH SEEPAGE PRESSURE. , 2014, 33(09): 1756-1764.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2014/V33/I09/1756

[1]	周志芳，王仲夏，曾新翔，等. 岩土体渗透性参数现场快速测试系统开发[J]. 岩石力学与工程学报，2008，27(6)：1 292-1 296.(ZHOU Zhifang，WANG Zhongxia，ZENG Xinxiang，et al. Research and analysis of composite ground consolidation with granular columns under arbitrary variation of horizontal permeability coefficient[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(6)：1 292-1 296.(in Chinese)) " target="_blank">
[2]	陈益峰，周创兵，盛永清. 应变敏感的裂隙及裂隙岩体水力传导特性研究[J]. 岩石力学与工程学报，2006，25(12)：2 441-2 452. (CHEN Yifeng，ZHOU Chuangbing，SHENG Yongqing. Strain-dependent hydraulic conductivity for single rock fracture and fractured rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(12)：2 441-2 452.(in Chinese)) " target="_blank">
[3]	YAMADA H，NAKAMURA F，WATANABE Y，et al. Measuring hydraulic permeability in a streambed using the packer test[J]. Hydrological Processes，2005，19(13)：2 507-2 524. " target="_blank">
[4]	HAMM S Y，KIM M S，CHEONG J Y，et al. Relationship between hydraulic conductivity and fracture properties estimated from packer tests and borehole data in a fractured granite[J]. Engineering Geology，2007，92(1)：73-87. " target="_blank">
[5]	张春生. 混凝土衬砌高压水道的设计准则与岩体高压渗透试验[J]. 岩石力学与工程学报，2009，28(7)：1 305-1 311.(ZHANG Chunsheng. Design criteria for concrete-lining high pressure hydropower tunnel and high pressure permeability test on rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(7)：1 305-1 311.(in Chinese)) " target="_blank">
[6]	王媛，顾智刚，倪小东，等. 光滑裂隙高流速非达西渗流运动规律的试验研究[J]. 岩石力学与工程学报，2010，29(7)：1 404-1 408. (WANG Yuan，GU Zhigang，NI Xiaodong，et al. Experimental study of non-Darcy water flow through a single smooth fracture[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(7)：1 404- 1 408.(in Chinese)) " target="_blank">
[7]	中华人民共和国行业标准编写组. SL31—2003水利水电工程钻孔压水试验规程[S]. 北京：水利电力出版社，2003.(The Professional Standards Compilation Group of People′s Republic of China. SL31—2003 Code of water pressure test in borehole for water recourses and hydropower engineering[S]. Beijing：Water Recourses and Electric Power Press，2003.(in Chinese)) " target="_blank">
[8]	刘世明，胡宏磊，陈鼎. 天荒坪抽水蓄能电站岔管区域高压渗透试验[J]. 岩土工程学报，1996，18(6)：31-38.(LIU Shiming，HU Honglei，CHEN Ding. High pressure permeability test at Tianhuangping pumped storage power station[J]. Chinese Journal of Geotechnical Engineering，1996，18(6)：31-38.(in Chinese)) " target="_blank">
[9]	郭启良，丁立丰，王海忠，等. 钻孔高压压水测试在深埋与承压洞室工程中的应用研究[J]. 岩土力学，2003，24(增1)：99-102.(GUO Qiliang，DING Lifeng，WANG Haizhong，et al. Application research of high water pressure test for deep buried and pressuring chamber projects[J]. Rock and Soil Mechanics，2003，24(Supp.1)：99-102.(in Chinese)) " target="_blank">
[10]	刘燕锋，宋汉周. 某抽水蓄能电站高压渗透试验分析[J]. 勘察科学技术，2006，(3)：18-21.(LIU Yanfeng，SONG Hanzhou. Analysis of HPPT results from a water-pumped storage power plant[J]. Site Investigation Science and Technology，2006，(3)：18-21.(in Chinese)) " target="_blank">
[11]	张新敏，蒋中明，冯树荣，等. 岩体高压压水试验的渗透系数取值方法探讨[J]. 水力发电学报，2011，30(1)：155-159.(ZHANG Xinmin，JIANG Zhongming，FENG Shurong，et al. Study on the determination of permeability coefficient of fractured rock mass under high pressure test condition[J]. Journal of Hydroelectric Engineering，2011，30(1)：155-159.(in Chinese)) " target="_blank">
[12]	IZBASH S. O filtracii v kropnozernstom materiale[J]. Leningrad，USSR，1931. " target="_blank">
[13]	张世殊. 溪洛渡水电站坝基岩体钻孔常规压水与高压压水试验成果比较[J]. 岩石力学与工程学报，2002，21(3)：385-387.(ZHANG Shishu. Comparison of results of conventional and high pressure water-pressure tests on the dam foundation rock masses of Xiluodu Hydroelectric Station[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(3)：385-387.(in Chinese))
[14]	RANJITH P G，DARLINGTON W. Nonlinear single-phase flow in real rock joints[J]. Water Resources Research，2007，43(9)：09502. " target="_blank">
[15]	苏锐，宗自华，王驹. 高分辨率声波钻孔电视及其在核废物地质处置深部岩体研究中的应用[J]. 岩石力学与工程学报，2005，24(16)：2 922-2 928.(SU Rui，ZONG Zihua，WANG Ju. Acoustic borehole televiewer with high resolution and its application to deep formation for geological disposal of nuclear waste[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 922-2 928.(in Chinese)) " target="_blank">
[16]	马峰，陈刚，胡成，等. 利用钻孔成像研究基岩地区的渗透张量变化规律[J]. 岩土工程学报，2011，33(3)：496-500.(MA Feng，CHEN Gang，HU Cheng，et al. Change of permeability tensors in fractured rock mass based on intelligent drillhole optical imager[J]. Chinese Journal of Geotechnical Engineering，2011，33(3)：496-500.(in Chinese))
[17]	HSIEH P A，NEUMAN S P，STILES G K，et al. Field determination of the three-dimensional hydraulic conductivity tensor of anisotropic media：2. methodology and application to fractured rocks[J]. Water Resources Research，1985，21(11)：1 667-1 676. " target="_blank">
[18]	蒋中明，傅胜，李尚高，等. 高压引水隧洞陡倾角断层岩体高压压水试验研究[J]. 岩石力学与工程学报，2007，26(11)：2 318-2 323. (JIANG Zhongming，FU Sheng，LI Shanggao，et al. High pressure permeability test on hydraulic tunnel with steep obliquity faults under high pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(11)：2 318-2 323.(in Chinese)) " target="_blank">
[19]	WEN J C，WU C M，YEH T C J，et al. Estimation of effective aquifer hydraulic properties from an aquifer test with multi-well observations (Taiwan)[J]. Hydrogeology Journal，2010，18(5)：1 143-1 155. " target="_blank">
[20]	WANG M，KULATILAKE P，UM J，et al. Estimation of REV size and three-dimensional hydraulic conductivity tensor for a fractured rock mass through a single well packer test and discrete fracture fluid flow modeling[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(7)：887-904.
[21]	荣冠，周创兵，王恩志. 裂隙岩体渗透张量计算及其表征单元体积初步研究[J]. 岩石力学与工程学报，2007，26(4)：740-746. (RONG Guan，ZHOU Chuangbing，WANG Enzhi. Preliminary study on permeability tensor calculation of fractured rock mass and its representative elementary volume[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(4)：740-746.(in Chinese))
[22]	HVORSLEV M J. Time lag and soil permeability in ground-water observations[C]// MI Bulletin，US Crops of Engineerings Waterways Experimental Station Vicksburg. [S. l.]：[s. n.]，1951，36：43-44. " target="_blank">
[23]	GALE J，ROULEAU A，ATKINSON L C. Hydrogeology of rocks of low permeability[M]. [S. l.]：International Association of Hydrogeologists，1985：1-16. " target="_blank">
[24]	LOMIZE G M. Flow in fractured rocks[M]. Moscow：Gosenergoizdat，1951：120-127. " target="_blank">
[25]	QUINN P M，CHERRY J A，PARKER B L. Quantification of non-Darcian flow observed during packer testing in fractured sedimentary rock[J]. Water Resources Research，2011，47(9)：W09533. " target="_blank">