北京房山花岗岩原地应力状态AE法估计
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摘要
在北京房山花岗岩体中钻了一个深301 m,直径101 mm的钻孔。从钻孔深度30～301 m,利用水泥端帽法对岩芯进行了定向。对深度270和294 m的定向岩芯进行了声发射Kaiser效应试验。水平面内最大主应力的方向基本为南北方向。将声发射Kaiser效应测量结果与水压致裂法的测量结果进行了对比,二者具有很好的一致性。
A borehole was drilled in granodiorite rockmass at Fangshan,Beijing. The depth of the borehole is301 m with diameter of 110 mm. From about 30～301 m,all cores were oriented by cement end cap method. AEKaiser effect tests on oriented core at depth of 270 m and 294 m were carried out. In horizontal plane,the orientation of larger horizontal principal stress is about the NS. Comparison of the result of AE Kaiser effect tests with that of hydrofracturing shows that they are consistent fundamentally on the whole.
A borehole was drilled in granodiorite rockmass at Fangshan,Beijing. The depth of the borehole is301 m with diameter of 110 mm. From about 30～301 m,all cores were oriented by cement end cap method. AEKaiser effect tests on oriented core at depth of 270 m and 294 m were carried out. In horizontal plane,the orientation of larger horizontal principal stress is about the NS. Comparison of the result of AE Kaiser effect tests with that of hydrofracturing shows that they are consistent fundamentally on the whole.
引文
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2De yTN,Brow nDW.Stre ssmeasureme nt i nade epgranit icro ckma ssusi nghydraul icfracturi nga nddifferenti alstra incur veanalysis[A].In:Stephansso nOed.Pro c.of6thInternationalSymposi umonRockStre ssandRockStressMeasurement[C].Lulea,Sweden:[ s.n.],1986,351～357
3MarsuiH,SatoT,SugiharaK.Compar is ono ftheres ul tsofst ressmeasurem entsdeterm in edbyvar iousmet ho dsattheKama ishimine[A].In:Sugawara&O baraed.RockStress[C].Netherlands:A.A.Balkema,1997,95～100
4KudoR,YokoyamaT. Stressmeasur emen tswi thcores amplesby AE-DRAm et hodsinthe199
5Hyogok en-nanbuea rthqua kesourceregion[A].In:Sugawa ra&Obaraed.RockStress[C].Netherlands:A.A.Balkema,1997,359～362
5李宏,大庆深层岩芯AE法应力测量报告[R].北京:中国地震局地壳应力研究所,1998
6KanagawaT,HayashiM,NakasaH. Es timatio nofspatia lgeostress co mpon entsinr ocksa mplesusin gtheKa is ereffect ofacousticemission[A ].In:Proc.of3rdAcousticEmissionSymposium[C] .Tokyo:[s.n.],1976,229～248
7Yosihik awa S,Mogi K.A newmethodf ore stimati onthec rust alstr essfromcoredsample s:lab or ato ryst ud yinthec aseofunaxialcompression[J].Tectonophysics,1981,74:323～339
8YosihikawaS,Mogi K.Exper im ent alstud ie sonthe effecto fs tresshis toryonac ousticemissio nactivity— —a possibilit yf ores timationofrockstr ess[J].JournalofAcousticEmission,1989,8(4):113～1 23
9L iChunlin. Atheor yf orKa ise ref fectinroc kanditspotentialapplicat i on[A].In :HardyHRed.Proc .of6thC onferenc eonAE/MSActivityinGeo logicalStructureandMaterial[C].USA:Pennsylvania,ThePennsylvaniaStateUniversity,1996,17 1～186
10Pes t man BJ,VanMu nsterJG. Anaco us ticemi ssionstudyo fda magedevelopme ntands tr ess-memoryeffectinsandstone[J].Int.J.RockMech.Min.Sci.&Geomech.Abstr.,1996,33(6): 585～593
11Hol co mbDJ.Gene raltheoryoftheKaisereffect[J].Int.J.RockMech.Min.Sci.&Geomech.Abstr.,1993,30( 7):929～935
12Hugs onDR,C rawfordAM .Ka iseref fec tgauging:an ewm ethodfordete rmining thepre -exi st ingin-sit ustr es sfromane xtractedcorebyacousticemiss ion[A].I n:StepuanssonOed.Proc.of6th Internationa lSymposiumonRockStressandRockStressMeasureme nt[C].Lulea,Sweden:[s.n.],1986,981～985
13李方全,张伯崇,祁 英男等.中国三峡地地下800m深部应力测量——中日合作AE法与水压致裂法对比研究[M].北京:地震出版社,1992
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