节理平均迹长与统计窗选位关联性分析

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摘要目前常用的统计窗迹长估算方法多假定节理中心在各向服从均匀分布，即认为统计窗的布置点位对平均迹长估算结果无影响。而实际上节理作为漫长地质演化过程的产物，受多期地质建造、构造综合作用，使得其形态及规模已发生较大的改变，呈现典型的地质韵律特征，若随机布置统计窗点位将会产生截然不同的迹长估算结果。为研究节理迹长与统计窗选位的关联性，以大岗山水电站地下主厂房区为例，首先对厂房区下游边墙节理组进行地质演化过程分析，确定厂房区优势节理组为辉绿岩脉及其节理影响带。接着以岩脉?81及其影响带为代表，对其发育地质韵律特征予以详细研究，藉此提出统计窗布置点位、尺寸及估算方法建议。最后采用5种统计窗估算法对研究区各区段节理迹长进行对比分析。研究发现：节理估算迹长与统计窗选位存在较强的关联性，不同的节理发育特征及统计窗布置点位适合于不同的节理组迹长估算方法，在应用统计窗法估算节理迹长时，需充分考虑优势节理发育规律，合理选择统计窗位置，尽可能将不同类型的节理包含其中，使之同时体现切割、交接、包含3种关系，并选取适合于本统计窗的迹长估算方法。

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关键词 ：岩石力学, 统计窗点位, 平均迹长, 优势节理组, 地质韵律特征, 关联性

Abstract：Now the assumed condition of common sampling window methods is that joint centers obey the uniform distribution，it means that the location of sampling windows has no effect on mean trace length of joints. Yet in fact，as products of the lengthy geological evolution，joints have been suffered from multiple geological formations and tectonic movements，shapes and scales have been changed largely；so their distributes display typical geological rhythm characteristics. If sampling windows are arranged at random，they will generate different mean trace length results. In order to find the relationship between mean trace length of joints and location of sampling window，taking the underground main powerhouse of Dagangshan hydropower station for example，firstly，the geological evolution rule of joints at its downstream wall was analyzed，and that diabase dikes and their influence areas were identified as the dominant joint sets，then choosing diabase dike ?81 and its influence areas to research their geological rhythm characteristics in detail；based on their characteristics，these proposals about the locations，sizes and estimation methods of sampling windows for deciding mean trace length of joints are put forward. Finally，five kinds of methods are used to calculate and compare the estimation results of mean trace length in different sections. The results indicate that the mean trace length of joints has a strong relationship with the location of sampling window；different distribution characters of joints and different locations of sampling windows will lead to different calculated values. So when using sampling window methods，it is needed to adequately consider the development rules of objective joints，and assign the location of sampling window accurately in order to contain all kinds of joints as far as possible；the sampling window should include intersecting，transecting and contained traces synchronously；and the estimation method should be chosen adequately.

Key words： rock mechanics location of sampling window mean trace length dominant joint sets geological rhythm characteristics relationship

收稿日期: 2010-11-18

引用本文:

申艳军1，2，徐光黎1，2，董家兴1，2，朱可俊3. 节理平均迹长与统计窗选位关联性分析[J]. 岩石力学与工程学报, 2011, 30(3): 596-602.
SHEN Yanjun1，2，XU Guangli1，2，DONG Jiaxing1，2，ZHU Kejun3. RELATIONSHIP BETWEEN MEAN TRACE LENGTH OF JOINTS AND LOCATION OF SAMPLING WINDOW. , 2011, 30(3): 596-602.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I3/596

[5]	ZHANG L，EINSTEIN H H. Estimating the mean trace length of rock discontinuities[J]. Rock Mechanics and Rock Engineering，1998，31(4)：217-235. " target="_blank">
[7]	LYMAN G J. Rock fracture mean trace length estimation and confidence interval calculation using maximum likelihood methods[J]. International Journal of Rock Mechanics and Mining Sciences，2003，40(3)：825-832. " target="_blank">
[9]	陈剑平，王清，肖树芳，等. 不连续面平均迹长概率估算法及其应用[J]. 工程地质学报，1996，4(1)：8-13.(CHEN Jianping，WANG Qing，XIAO Shufang，et al. The probability estimation of discontinuity plane?s mean trace length and its application[J]. Journal of Engineering Geology，1996，4(1)：8-13.(in Chinese))
[10]	黄国明，黄润秋. 基于交切条件下的不连续面迹长估计算法[J]. 地质科技情报，1999，18(1)：105-107.(HUANG Guoming，HUANG Runqiu. Estimation discontinuity trace lengths based on the intersection condition[J]. Geological Science and Technology Information，1999，18(1)：105-107.(in Chinese)) " target="_blank">
[11]	范留明，黄润秋，丁秀美. 侧裂结构面迹长估计方法研究[J]. 水利学报，2002，4(1)：23-27.(FAN Liuming，HUANG Runqiu，DING Xiumei. Study on algorithm of trace length estimation for discontinuities for sideslip surface[J]. Journal of Hydraulic Engineering，2002，4(1)：23-27.(in Chinese)) " target="_blank">
[13]	金曲生，王思敬，陈昌彦. 估计迹长概率分布函数的新方法及其应用[J]. 工程地质学报，1997，5(2)：150-155.(JIN Qusheng，WANG Sijing，CHEN Changyan. A new method for estimation probability distribution functions of trace length and its application[J]. Journal of Engineering Geology，1997，5(2)：150-155.(in Chinese))
[14]	金曲生，范建军，王思敬. 结构面密度计算法及其应用[J]. 岩石力学与工程学报，1998，17(3)：273-278.(JIN Qusheng，FAN Jiangjun，WANG Sijing. A new method to calculate density of discontinuity and its application[J]. Chinese Journal of Rock Mechanics and Engineering，1998，17(3)：273-278.(in Chinese))
[15]	王贵宾，杨春和，包宏涛，等. 岩体节理平均迹长估计[J]. 岩石力学与工程学报，2006，25(12)：2 589-2 592.(WANG Guibing，YANG Chunhe，BAO Hongtao，et al. Mean trace length estimation of rock mass joint[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(12)：2 589-2 592.(in Chinese)) " target="_blank">
[17]	罗国煜，吴恒. 岩坡稳定系统工程分析的初步探讨[J]. 地质论评，1986，32(2)：165-173.(LUO Guoyu，WU Heng. Rock slope stability and its systematic engineering analysis[J]. Geological Review，1986，32(2)：165-173.(in Chinese))
[18]	蒋建平，章杨松，罗国煜，等. 优势结构面理论在岩土工程中的应用[J]. 水利学报，2001，16(8)：90-96.(JIANG Jianping，ZHANG Yangsong，LUO Guoyu，et al. The application of preferred plane theory to geotechnical engineering practice[J]. Journal of Hydraulic Engineering，2001，16(8)：90-96.(in Chinese)) " target="_blank">
[2]	KULATILAKE P H S，WU T H. Estimation of mean trace length of discontinuities[J]. Rock Mechanics and Rock Engineering，1984，17(4)：215-232. " target="_blank">
[3]	LASLETT G M. Censoring and edge effects in areal and line transect sampling of rock joint traces[J]. Mathematical Geology，1982，14(2)：125-140. " target="_blank">
[6]	ZHANG L，EINSTEIN H H. Estimating the intensity of rock discontinuities[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(5)：819-837. " target="_blank">
[1]	MAULDON M. Estimating mean fracture trace length and density from observations in convex windows[J]. Rock Mechanics and Rock Engineering，1998，31(4)：201-216. " target="_blank">
[4]	LASLETT G M. The survival curve under monotone density constraints with application to two-dimensional line segment processes[J]. Biometrical，1982，69(1)：153-160. " target="_blank">
[8]	MAULDON M，MAULDON J G. Fracture sampling on a cylinder：from scanlines to boreholes and tunnels[J]. Rock Mechanics and Rock Engineering，1997，30(6)：129-144. " target="_blank">
[12]	范留明，黄润秋. 一种估计结构面迹长的新方法及其工程应用[J].岩石力学与工程学报，2004，23(1)：53-57.(FAN Liuming，HUANG Runqiu. New method for estimation trace length of discontinuities and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(1)：53-57.(in Chinese))
[16]	罗国煜，王培清，蔡钟业，等. 论边坡两类优势面的概念及其研究方法[J]. 岩土工程学报，1982，4(2)：40-45.(LUO Guoyu，WANG Peiqing，CAI Zhongye，et al. On the concept of two preferred planes and its analysis methods[J]. Chinese Journal of Geotechnical Engineering，1982，4(2)：40-45.(in Chinese)) " target="_blank">