Large-scale hydraulic conductivity measurements in fractured granite

53A

Physico-chemicai properties See also 842167

842108 First phase of small diameter heater experiments in tuff Zlmmerman, R M

Proe 24tk US Symposium o n Rock Mechanics, College Station, Texas, 20-23 June 1983 P271-282 Publ AEG, 1983 As part of the Nevada Nuclear Waste Storage Investigations project, heater experiments were earned out to evaluate the thermal and hydrothermal behavtour of welded and nonwelded tuff In each experiment, temperatures were measured along the surface of the 10 2cm &ameter heater and the 12 7cm diameter boreholes Results were compared with computer models, and this indicated that the same heat transfer model could be used for both tufts Hydrothermal measurements m&cated that the major water transport mechamsms were accumulation of vapour in the warmer air around the heater and later deposmon as condensate m cooler regions away from the heater

842111

Permea~iity and pore-fluid chemistry of the Bullfrog Tuff in a tempei~atUre gradient Morrow, C, Moore, D; Byerlee, J Proc 24tk US Symposium on Rock Mechanics, College Station, Texas, 20-23 June 1983 P819-827 Publ AEG. 1983 The permeability and fluid chemistry of the Bullfrog Tuff from the Nevada Test Site was studied under simulated nuclear waste repository condmons to determine the ease with which radionuclides could be carried m the environment Permeabllltles of the initial room temperature rock ranged from 0 4 to 0 85 mlcrodarcles Upon heating, these values increased several mlcrodarcles due to thermal cracking Exposure to the hot flmds over time reduced the permeablhty of the 250 deg C cyhnders by 25-50% of the mmal heated values, regardless of the chemistry of the pore fluids Chemical analysts ofthe discharged pore flmds m&cates that the growth of minerals such as zeohtes or smectlte clays within cracks and pores of the tuff may have led to the observed permeabdlty reductions

Permeability and capillarity 842109 Scale and water-saturation effects for thermal properties of low-porosity rock

See also 842065, 842111

Chan, T, Jeffrey, J A Proc 24th US Symposium on Rock Mechanics, College Station, Texas, 20-23 June 1983 t>287-301 Publ' AEG, 1983

842112 Moisture migration in shale (In Polish)

Temperature data from an m sttu heater experament conducted at 340m depth m a granite body are utdlzed m a least-squares regression analysis to estimate the bulk thermal conductwlty and thermal dlffus~vlty of the rock mass Both m sltu thermal conductwlty and m situ thermal &ffuswlty are found to be within approximately 10% of laborator~ values determined using standard-s~ze core samples The estimated m sltu thermal properties are confirmed by comparing temperatures calculated using the in sltu values with temperature data from an independent experiment If the low-porosity rock mass is considered to he saturated with water, the effective bulk thermal conductwtty will dewate from that of the rock matrix by only a few percent for any assumed geometrical &stnbutlon of fractures If the fractures and pores are filled with mr, the bulk thermal conductlvlty wdl be very sensltwe to the degree of thermal contact across a fracture When thermal conduction across sohd-sohd contacts ts taken into account, the effect of fractures is found to be small Thus the thermal properties of low-porosity rocks, especmlb when saturated with water, are rather msensttwe to scale

842110 Effects of joints on thermally induced displacements and stresses Cook. N G W Proc 24th US Symposium on Rock Mechanics, College Station, Texas, 20-23 ,tune 1983 P303-307 Publ AEG. 1983 Measurements o f thermally reduced &splacements at Stnpa showed that they were non-hnear and smaller than those predicted by calculations using linear thermoelasuclty The quartz monzonlte at Stnpa Js mtenswely jointed. The effects of extensive joints on thermally induced displacements and stresses are examined theoretically A joint is considered to be a plane of contact containing fiat voids Displacements across such a plane are shown to depend upon only the 'effectwe stress" across the joint and the volumetric closure of the voids resulting from this 'effectwe stress' Auth

RMMS

21 2--F

Ryncarz, T Arch Gorn 1127, N4, 1982, P439-451 An evaluation of the magmtude of moisture dtffuswlty In a shale, based on the results of laboratory tests, showed moisture dlffuslvlty had an almost hnear dependence on the relatwe humidity of the surrounding atmosphere A solution of the diffusion equaUon is apphed to determine the rate of moisture m~gratlon into the fiat shale roof of a mine opening

842113 Nonsteady flow of non-Newtonian fluids through a porous medium Pascal, H lnt J Engng Sei 1/21, N3. 1983. P199-210 An understanding of non-Newtonlan flow behavlour through porous me&urn ~sessential to the analysis of crude flow and pre&ct~on of oll reservoir performance heavy and waxy crudes show flow deviation from Newtonlan behavlour A flow system is analysed to illustrate the rheologlcal behavtour effects on pressure and flow rate &strlbutlon Results show that the rheologlcal parameter, shear stress at zero rate of shear, and the consistency index have a slgmficant effect on flow behavmur

842114 Large-scale hydraulic conductivity measurements in fractured granite Wilson, C R, Wltherspoon, P A, Long, J C S, Galbralth, R M, DuBols, A O, McPherson, M J lnt J Rock Meek Min Sei V20. N6, Dec 1983, P269-276 The large-scale hydrauhc conductivity experiment at Stnpa, Sweden, was an attempt to produce a macromeasurement of the average hydrauhc conductwtty of approximately 200,000cu m of low-permeablhty fractured gramte Groundwater seepage into a 33m long, 5m diameter drift was measured as the net moisture p~ckup of a ventllatmn system Water pressures were momtored at 90 locations m the rock mass Analysis of test results m&cates a behavlour approximating radml flow m a porous me&um Tests made at three &fferent draft air temperatures yielded very slmdar results