- Email: [email protected]
A note on the fracture propagation and time-dependent behaviour of rocks in uniaxial tension
I07A
1016 WANG, C UNIV .CALIF .B~RKELEY, USA LIN,W UNIV .CALIF .B~RKELEY, USA The effects of water and pressure on velocities of elastic waves in a foliated rock. 4F,24R. J. GEOPHYS .RES,VSO,N8,MAR .1975,Pl065-1069. Velocities for both compressional and shear waves in an Alpine gneiss have been determined along its principal fabric directions under dry, saturated and high pressure conditions. The experimental procedure sad results are discussed.
102h PENG, SS W.V~GINIA UNIV .MORGANTOWN,UBA A note on the fracture propagation and time-dependent behaviour of rocks in uniaxial temsion. 5F,5R. INT.J.ROCE MECH .MIN.SCI. GEOMECH .ABSTR,VI2, N4, AFR. 1975,P125-127.
Strength characteristics See also abstract: i03~.
i017 SHANLEY,RJ MAHTAB,MA FRACTAN. A computer code for analysis of clusters defined on the unit hemisphere. 3F. US BUR.MINES, INFORMATION CIRCULAR, IC 8671,1975,49P. A computer code for isolating naturally occurlmg clusters of data plotted on the unit hemisphere and testing these clusters against a probability distribution that admits elliptical symmetry about its mesa is described. A listing is provided sad an exsm~le output illustrating the delineation and analysis of clusters in fracture orientations measured in a porphyry copper deposit is given.
Fracture processes in rocks i018 HAIM3ON,BC UNIV .WISCONSIN, MADISON, USA Hydrofracturing of inhomogeneous and Jointed rock. Meeting. AIME lOhTH ANNUAL MEETING, NEW YORK, FEB.1975. 1019 DANESHY,A HALLIBURTON SERV .OKIA.USA Hydraulic fracturing in coal deposits for gasification. Meeting. AIME 104TH ANNUAL MEETING, NEW YORK, FEB.1975. 1020 DANESHY,A HALLIBURTON S~qV .OKIA.USA Hydraulic fracture propagation in the presence of pls~es of weakness. Meeting. AIME 104TH ANNUAL MEETING, NEW YORK, FEB.1975. 1021 BEAVEN, CH IMP.CoLL. SC I.TECHNoL .IONDON.GB SWAN, G IMP. COLL. SC I.TECHNOL. IONDON. GB Electronic instrumentation in rock breakage research. Technical note. 7F, 5R. IMM BULL. TRANS .A,V84, N821, APR. 1975, PAT1-A73. A relatively inexpensive measuring system for the study of crack propagation phenomena is described. 1022 THIRUMALAI, K Single fracture and fragmentation of brittle solids subjected to thermal shock. Proe.Symp.Defect Interact. Solids, Bangs/ore, India, Ms~ 1972. INDIAN J. TECHNOL,Vll, N10, OCT .1973, P419- h27. A new technique of inducing crushing of rocks and related brittle solids by a single fracture process using thermal shock principles is described. Fragmentation is initiated by tensile thermal stress concentrations of material defects within the interior of the solid. 1023 RUMME ,F Experimental investigations of fracture processes in rocks. In German. 45F,3T,85~. BERICHTE INST. GEOPHYS IK .RUHR.UNIV~S ITAT,BOCHUM, N4, JAN .1975,145P.
I025 SHUSHERINA, EP Tensile strength of frozen fines and ice at low temperatures (down to -60 deg. C). In Russian. 16R. MERZLOTNYE ISSLEDOVANIIA,VI~, 1974, P179-189.
Time-dependent behavior 1026 SHADUNTS, KS RIABOV,AK Calculating soil creep on slopes. In Russian. 8R. VSES .NAUCH- ISSLEDOV. INST. GII~OG~0L. INZHEN. GEOL. TRUDY, V56,1972,P13-21.
Physico-chemical.properties 1027 MARDISEWOJO, P Elastic wave velocity behavlour of rocks at low temperatures. Thesis. Figs,Tabls,Refs. PH.D. THES IS,UNIV .TUI~A,OKIAHOMA, USA, 1973,176P.
Permeability and capillarity 1028 BARR,MV l~r~ pressure permeability testing in fissured rock mass es .Thesis .38F,IT, 18R. MSC THESIS, I~P.COLL.SCI.TECHNOL.UNIV.LONDON.1974,87P. An equivalent permeability value based on a contimuum approach was thought to be capable of providing the basis of explaining flow phenomena in the borahole, but durLug the course of study it became apparent that the continu~n approach would not explain borehole flow behaviour as this type of analysis tends to oversimplify borehole geometry. ~hus the author attempts to explain what constitutes a meaningful permeability value. 1029 ZOBACK, MD BY]~LEE, JD The effect of mlcrocrack dilatancy on the permeability of Westerly granite. 4T,16R. J.GEOPHYS .RES,VSO,N5,FEB .1975,P752-755 • Permeability 8nd volumetric strain were measured under constant confining pressure and pore pressure as a function of increaslng and decreasing differential stress. The results indicate that permeability and dilatant volt,me changes are not unique functicr~ of differential stress, sad permeability changes with differential stress are not uniquely dependant upon dilatant volume changes. Also microcraek dilatancy is physical/~ inadequate to account for dilatm~%cy-fluid diffusion in situ.
1016 WANG, C UNIV .CALIF .B~RKELEY, USA LIN,W UNIV .CALIF .B~RKELEY, USA The effects of water and pressure on velocities of elastic waves in a foliated rock. 4F,24R. J. GEOPHYS .RES,VSO,N8,MAR .1975,Pl065-1069. Velocities for both compressional and shear waves in an Alpine gneiss have been determined along its principal fabric directions under dry, saturated and high pressure conditions. The experimental procedure sad results are discussed.
102h PENG, SS W.V~GINIA UNIV .MORGANTOWN,UBA A note on the fracture propagation and time-dependent behaviour of rocks in uniaxial temsion. 5F,5R. INT.J.ROCE MECH .MIN.SCI. GEOMECH .ABSTR,VI2, N4, AFR. 1975,P125-127.
Strength characteristics See also abstract: i03~.
i017 SHANLEY,RJ MAHTAB,MA FRACTAN. A computer code for analysis of clusters defined on the unit hemisphere. 3F. US BUR.MINES, INFORMATION CIRCULAR, IC 8671,1975,49P. A computer code for isolating naturally occurlmg clusters of data plotted on the unit hemisphere and testing these clusters against a probability distribution that admits elliptical symmetry about its mesa is described. A listing is provided sad an exsm~le output illustrating the delineation and analysis of clusters in fracture orientations measured in a porphyry copper deposit is given.
Fracture processes in rocks i018 HAIM3ON,BC UNIV .WISCONSIN, MADISON, USA Hydrofracturing of inhomogeneous and Jointed rock. Meeting. AIME lOhTH ANNUAL MEETING, NEW YORK, FEB.1975. 1019 DANESHY,A HALLIBURTON SERV .OKIA.USA Hydraulic fracturing in coal deposits for gasification. Meeting. AIME 104TH ANNUAL MEETING, NEW YORK, FEB.1975. 1020 DANESHY,A HALLIBURTON S~qV .OKIA.USA Hydraulic fracture propagation in the presence of pls~es of weakness. Meeting. AIME 104TH ANNUAL MEETING, NEW YORK, FEB.1975. 1021 BEAVEN, CH IMP.CoLL. SC I.TECHNoL .IONDON.GB SWAN, G IMP. COLL. SC I.TECHNOL. IONDON. GB Electronic instrumentation in rock breakage research. Technical note. 7F, 5R. IMM BULL. TRANS .A,V84, N821, APR. 1975, PAT1-A73. A relatively inexpensive measuring system for the study of crack propagation phenomena is described. 1022 THIRUMALAI, K Single fracture and fragmentation of brittle solids subjected to thermal shock. Proe.Symp.Defect Interact. Solids, Bangs/ore, India, Ms~ 1972. INDIAN J. TECHNOL,Vll, N10, OCT .1973, P419- h27. A new technique of inducing crushing of rocks and related brittle solids by a single fracture process using thermal shock principles is described. Fragmentation is initiated by tensile thermal stress concentrations of material defects within the interior of the solid. 1023 RUMME ,F Experimental investigations of fracture processes in rocks. In German. 45F,3T,85~. BERICHTE INST. GEOPHYS IK .RUHR.UNIV~S ITAT,BOCHUM, N4, JAN .1975,145P.
I025 SHUSHERINA, EP Tensile strength of frozen fines and ice at low temperatures (down to -60 deg. C). In Russian. 16R. MERZLOTNYE ISSLEDOVANIIA,VI~, 1974, P179-189.
Time-dependent behavior 1026 SHADUNTS, KS RIABOV,AK Calculating soil creep on slopes. In Russian. 8R. VSES .NAUCH- ISSLEDOV. INST. GII~OG~0L. INZHEN. GEOL. TRUDY, V56,1972,P13-21.
Physico-chemical.properties 1027 MARDISEWOJO, P Elastic wave velocity behavlour of rocks at low temperatures. Thesis. Figs,Tabls,Refs. PH.D. THES IS,UNIV .TUI~A,OKIAHOMA, USA, 1973,176P.
Permeability and capillarity 1028 BARR,MV l~r~ pressure permeability testing in fissured rock mass es .Thesis .38F,IT, 18R. MSC THESIS, I~P.COLL.SCI.TECHNOL.UNIV.LONDON.1974,87P. An equivalent permeability value based on a contimuum approach was thought to be capable of providing the basis of explaining flow phenomena in the borahole, but durLug the course of study it became apparent that the continu~n approach would not explain borehole flow behaviour as this type of analysis tends to oversimplify borehole geometry. ~hus the author attempts to explain what constitutes a meaningful permeability value. 1029 ZOBACK, MD BY]~LEE, JD The effect of mlcrocrack dilatancy on the permeability of Westerly granite. 4T,16R. J.GEOPHYS .RES,VSO,N5,FEB .1975,P752-755 • Permeability 8nd volumetric strain were measured under constant confining pressure and pore pressure as a function of increaslng and decreasing differential stress. The results indicate that permeability and dilatant volt,me changes are not unique functicr~ of differential stress, sad permeability changes with differential stress are not uniquely dependant upon dilatant volume changes. Also microcraek dilatancy is physical/~ inadequate to account for dilatm~%cy-fluid diffusion in situ.