221A

2184 PINCUS, EJ WT_PF,RA Effects of alteration and ~oint filli~s on the mechamical behavic~r of rocks, i ~ relxrt. 2. Fin~l re~. II2F. US BUR.MINES, OPEN FILE ~,OFR 29-1-74 AND OFR 29- 2-74,MAY, I~73,206P, ~ JAN.I~7~,8~P. Rock from the Climax amd Hemderson mines in Colorado amd from the San Mara~l mine in Arlzona are descrlbed (colc~r, texture~ mineral ccmpoaltlon~ cce~ition and fabric of fracture filli~s, density ar~ Porosity) an~ results are presez~e~ from umco~fined ~ ~risxial COml~ession tests. In the aecon~ report conclusions from these tests are presented.

2185 MOGI~K UNYV.TCKYO~ J On t h e p r e s s u r e depemde~ce of s t r e ~ t h o f rocks

t h e Coulomb f r a c t u r e c r i t e r i o n . ~F,37R. TEOYONOFHYSICS, V21, NS, FEB. 1974, P273- 285 • The applicability of the Coulomb criterion is in the light of pUblished data. Although observed stremgth versus pressure c~s are mainly explained by the Coulomb theory, deviation free the predicted linear relation occurs in a low-pressuTe re~ion in certain rocks ard near the hrit~le-dnc%ile %zemsition pressure. Same possible eXplamations for deviation are suggested.

Shear deformation characteristics

2186 ISHI~, I UNYV.WASHI~fON, SEATTLE, USA SH~2~IF, MA UNIV .WASHINGTON, S~a-~V~E, USA sell liquefaction by torsiomsl simple shear. 2OF, ~T,~R. J • G~CH. ~.DIV.VIO0, N. G~8,1974, I~71-888. A new t o r s i o n s l simple sheer device for soil liquefact- ion study is described. Free exper~ data ob- tained uai~ this device a relationship between the st ress ratio ax~ the number of cycles to liquefaction is proposed. An az~cal method for Identlfyiz~ t h e be~Ixmi~ of i~i%ial liquefaction d~r i r~ experiments is also proposed.

2187

MOONEY, HM UNIV • MINNESOTA, MINNEAPOLIS, USA Seismic shear waves in emgineerir~. 15F,41R. J. GE0~CH. ER3RG.DIV.VI00, N. GT8,197~, PgO 5-923. This paper considers the use of shear waves for dete~- mlni~ d~c elastic moduli. The principles of shear wave prope@ation are studied ar~ methods by which shear waves can be g e n e r a t e d a~d d e t e c t e d a re d i s c u s s e d . The problems a s s o c i a t e d wi th t h e i d e n t i f i c a t i o n of shear waves on the seismic wave form and the computation of veloci- ties ere considered.

2188 HOCKER, VE AGGSON, JR BICKEL, DL Improvements in the three-ceeponent borehole deforms- %ion gaUge ar~ overcori~g techniques. With an appen- dix on stress relief by centre hole by W.I. Duvall. 20F. us ~0~.~NES ~ 78~,Z974,zgr. Modifications in the borehole deformation gauge design have i~oved the creep charac~teristics ar~l enhe~ced the ga~e's versatility a~ have resulted in ahar~es in t h e overc~ri~ t e c h n i q u e s . Data f r e e field teats is used to eom~x~re ~e reliability of the new ga~e~ with the pre- ex i s t iDg models a~l tO a s s e s s t h e a ~ c e s s of t h e r~w t e c h - n iques in obtainir~ good emgineering estimates of stresses.

2189 ~S,G V00~,H In-situ dete~ion of the defc~io~al behavic~r of a cubical rock-mass sample urd~ triaxial load. IOF, ~ 12R. ROCK ~CHANICS,V6, N2,1974,P65"79. An im~wative ~et-up for triaxial In-situ experiments on cubical samples of ~ointed rock was tested far the first time in the Flyech-~ype rocks of the Ghiom massive in Western Gree~e in 1972. Loads were appli~1 iD three crt- ho~o~al directions iniepe~lently of each other at the desired rate on three samples. Defecations of the sam- ple were mea~ed with extenseeeters ar~ l n c l i r ~ m e t ~ s . The test resuLts re~ler information about %he three-dlmen- siomal behavio~r of the reek with regard to deformation and ~treDgth. The influence of the Joint e~m~cture on the behavic~r of the rock mass was determined. Auth.

2190 L U ~ , W VULIS, PD LITVINOV, BM Relation~p of t h e mcduli of deformation in soil cc~ession ax~ tension. 2F, ~R.

The paper aims to establish t h e de l~x l a r~e Of t h e co- efficie~ of l~hysical arAisotrol~ on the type and state of soil. Results of cempression and tensile tests of specimer~ c~ diat~x~e~l icarus a~ clays of diffe~-ent water co~ent a~ porosity are given, and the n~=thod c~ specimen preparation d e s c r i b e d .

2191 RUI~, EH IMP-MR. COLL. SCI .TECHNC~. LONDON, GB The influence of %mnperature, strain rate and interstitial water in the experimental deformation of calcite rocks. 8F, ST, 36R. TECTONOPHYSICS, V22, N3-4, JUNE, 1974, F311-334. A series of experiments are described to illustrate the effects of temperature, strain rate ar~ the presence of Ix:we water on the rheological behaviour of Carfare marble a~ Solnhofen limestone. All of t h e exper iments were performed at an effective confini~ pressure of l.Skbar. The results of the experiments performed on dry samples are competed with previously published data for Yule marble. Frnm the data, a method is proposed fo~ estimat- i~ the probable atremgth of calcite rocks urger geologi- cal conlitions.

Fri ction in rocks

See also abstract: 2213.

2192 FRIEDMAN, M TEXAS A AND M UNIV.CGLL.STRrlON, USA LOGAN, JM TEXAS A AND M UNIV.CC~L.SrRrION, USA RIGERT, JA TEXAS A AND M UNIV.COLL.STR~ION, USA Glass-irdurated q%mrtz go~e in slldi~ friction experiments on sard~tone. 6F,18R. GEOL. SOC. AMER.BULL.V85, N6, JUNE, 1974, ~ ' ~ $ 2 .

2193 STESKY, RM MIT, CAMBRIDGE, MASSA~S, USA BRACE, WF MIT, CAMBRIDGE, MASSACHUSETTS, USA RILEY, EK MIT, CAMBRIDGE, MASSACHU~A'±'% USA Friction in faulted rock at high temperature ar~ pressure. 15F, ST, 36R. TECTONOPHYSICS, V23, NI- 2, JULY, 1974, P177" 203. Two hu~ obaervatioms of friction~l 1~ehavic~ of seven low-porosity silicate rocks were made a~ 1~maperatures up to 700 deg.C s~ pressures from 2.5 to 6MBa~. Two of %he rocks, Westerly granite a~d San Marcos t~,b'b¢'o were mc~e ir~enaively studied. The effects of tem~ure,