Creep of rock-like materials

Creep of rock-like materials

105A direct, giving accurate v a l u e s of Y O m ~ ' s modulus which validate i t s diaglacsmen% values..The University of Lulea method Is Ird~rect ...

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105A

direct, giving accurate v a l u e s of Y O m ~ ' s modulus which validate i t s diaglacsmen% values..The University of Lulea method Is Ird~rect ~ gives d i s p l a c m ~ n t v a l u e s that are in @~od a~reement. It is co~cluded %hat the SveDeFo method Is easier to use ami is prefezTed to the Lulea method. Avail: The F ~ t l o n , Stockholm, Sweden

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Laboratory measurements of resistivity variation with percentage moisture were carried out on 63 samples frc~ 16 coal seams. It was observed that resistivity values decay exponentially with imcrease in percentage of water saturation. A large differemce in resistivity values was found amomg the coal seams, even when they were fully saturated with water.

Box 32058, S-126 Ii

Surface properties 834060 RESPONSE OF SOYL-CONURETE IMz'~ACE AT HIGH PRESSURE Huck, P J; Saxena, S K Proc 10th International Co~fereuce on Soll Mechs~ics a~d Foumdatlon Eh~ineerlng, Stockholm, I~-I9 Jlme i~81, V2, PI~I-I~. Publ Rotterdam: A. A. I ~ , ~ ; l~l

Permeability and capillarity See also: 83~338

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A soil-co~crete interface response model was derived using a basic frietlo~al mechanism as applied to a particulate soil. Sixteen scilco~crete interface tests were cor£1ucted in a special dynsmic simple shear device uai~E 2 types of soll, 2 interface textures ar~ ~ normal stresses. Model a~i experimental results were compared.

83~o~I DISPLACEMENT

Using the carre~pomdeuce primciple of viscoelasticity, the Displacement Disconti::ulty Method has been exte,~ded to model the r a t e - d e p e n d e n t behaviour of a Jointe~ rock mass. The intact rock is assumed to behave as a linear viscoelastic material while, in general, a non-linear ra~edependent behaviour of the rock Joints can be accounted fc~. A rammer of mz,erical examples are presented which illustrate the accuracy a~d potential of the method fC~ a~alyslng ecmlmlex e~gineering problems. Auth.

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Physico-chemicai properties

83b,067 FROGRAMRVRLV1 - INTERACTIVE DETERMINATION OF HORIEONTAL P E ~ I L I T I E S WITHIN UNYFOR~ SOILS FROM F~ELD TESTS USING RVC~SLEV'S Weyer, K U; Hcrwood-Brcwn, w C Ground Water, V20, N3, May-June 1982 , P289-297 A computer program is Iresented for interactive, user-ariented calculation of permeabilities from slug tests using Hvc~slev's fcTmulae f ~ filters in uniform soil.

83~O68 LG;-PRESSURE PNEUMATIC POROSI~"I'~ FOR r~.~I'E~[INATION OF THE POROSITY OF ROCKS (IN POLISh) ROgoz, M; Adamska-Ka~alec, E Bittl GI Inst Gorn, V33, NI, 1982, P~-7

83~063 MAGNETIC PROPERTIES OF SOME THOLEIITIC RASALTS DREDGED FRC~ THE GULF OF CALIFORNIA, MEXICO thT~tia-F~cugauchi, J Ann Oeo~hys, V38, NI, Jan-March 1982, P7~-82 Rock magnetic properties a=l chemical armlyses of the basalts suggest %hat elthc~h low-temperature sea floor weathering plays an role, some properties, such as remane~ce intensity, susee!~tibillty anl eOeTelvit~J reflect additional superimposed effects due to other factars, eg age of the sample.

MICROCRACK T R A N ~ T I O N S IN MAYET DE MONTAGNE ( A I I ~ , FRANCE) GRANITIC ROCK U ~ E ~ THE I K U E~CE OF HYDROTHE~MAL ALTERATION MINERAL REACTIONS (IN FRENCH) Parneix, J C; Meumier, A Arm Geol~kVs, VBS, N2, April-,tins 1982 , P203-210 The study shows 3 types of crack: (i) primary mlcrocracks, a result of mineTal reactions in the rock, (2) secondary mlerocracks ar~ (3) cracks filled with carbonates. ~nis study can be used as a model far a system of simulated water circulation.

OF ROCK-LIKE MATERIALS Cons~antinescu, M; Cristescu, N I n t J Emgng S c i , V21, m , 1983, ~ 5 - ~ 9 An experimental procedure to determine the constitutive equation able to describe creep of rock-like materials is given. This constitutive equation describes both volume creep amd creep of the deviat~ic strains. Tests have been carried out on cement concrete.

EFFECTS OF CONSOLIDATION ON PERMEABILITY MEASUREMENTS FOR S O ~ CLAY. TECHNICAL NOTE Znidarcic, D; Ko, H Y; Olsen, H W Geotechnique, V33, N1, March 1983, P67-72 Results fram permeability tests (falling hera ard flow ~ methods) have been used to demonstrate that very small flow gradients are required to obtain valid permeability measurements in soft clays. For higher gradients, eg in fallir6 head amd comstant head methods, substantial errars are introduced by seepage consolidation. The flow pump method is able to minimise these errars amd can be performed in less time than constant ar falling head tests.

Time dependent behaviour DISCONTIE~u'ITYAPI~OAC~ TO MO~w~'Y.'rl~ THE ~ B~AVlOUR OF ROCK A~D ITS D I S C O ~ Crawfc~i, A M; Currsm, J H Int J ~ A:ml Meth G e t S , VT, ~2, AprilJUne 1983, P2b,~-268

~ J D Y OF TEE RESISTIVITY OF COAL SEAMS OF THE JHARIA COALFIELD, INDIA Verma, R K Energy Sources, V6, ~ , 1982, P273-291

A prototype pneumatic low-~ressure pcrosimeter of simple construction is presented. Its operatimg prir~iple and procedure, and the method of interpretation of results are discussed. Results ~ porosity tests on Carboniferous sardatones are given. Auth.

Compressibility, swelling and consolidation 8~,o69

APPLICATION OF CONSOLIDATION T H E ~ Y FOR PEAT TO THE DESIGN OF A RECLAMATION SCHEME BY PRELOADING Berry, P L Q J Ergng Geol, V16, N2, 1983, P103-i12