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Blasting 67. HOBL~, M Blasting long boreholes ou caved i ~ faces in order to reduce stresses ~ the rock mass. In Polish. PR~EGL. G ~ N .V~i,NT.8, JULY.AUG .1975,P~69-27~. A blastiDg method for Use in brin~ll~ down a roof which is difficult and breaks irregulm-~ is d e a c r ~ e d . 68. MEL~IKOV, NV D~II~,GP T e c h n i c a l p r o g r e s s i n i n d u s t r i a l u s e s of explosions. IT,IIR. IZVESTIYA,PHYS.SOLID EARTH.WlO, 197~,P6~2-6~6.
Rock and soil improvement techniques 69. BECKEt', R C~mltin~ e ~ u l ~ t . - A review of some g~aiting e~uil~m~t and a ~ l l c a t ~ is gives.iF. C IV.E~GNG,S~T.197~, P27.
STATE'S RAD FOR BYGGNADSFORS~ING, STOCKHOLM, 1975,82P. ~ e laboratory tests ca the pe~etratiom of ~routs into sand end narrow gaps, which are described in National Swedish Building Research Report R4~: 1970 have been supplemeflted using new ~routs end by perfcr~Im~ tests at lower temperatures. Limited field tests were performed in a rock t~mmel of s~out 6 so. m cross sectl~ in o r d e r t o find what d e g r e e o f i ~ e r m e a b l l i t y can be achieved using ch~nical grout of low viscosity end high pemetratiom capacity.
G rou ndwater control 75. LANCAST~. JONES,PF C~M~T.G~ND ~ G ~ , CROYDON,GB The interpretation of t h e Lugeon water-test .Technical note.IF, 18~. Q.J. ~GN~ G~0L.VS, N2,1975, FISI-15~ • The problem of e~rapolatin6 the r e s u l t s o f the Lu@eon test, t h e ~ O b j e c t o f which is to determine a water absorptlca c o e ~ l c i e z ~ w h m s ~ S = o u t ~ i=~ectimmm in rocks~ is briefly reviewed by cce~Iderlm~ earlier results of other ~rkers. Results of a modified l~e~ t~et, c o ~ t e d a t A i r Aa~el Dam in Morocco, d u r i n g 9-1970~ ere m~al~ed i n detail. It is c~mmlm~ed that u n d e r the n o r ~ l c o n d i t i o n s of w a ~ r t e s t ~ i n sound rock, t h e flow tends to be t u r b u l e n t , end t h a t e~~gtlc deformation of the rock is i ~ i ~ i c s ~ t . This m ~ not hold true for weak or finely.fissured rocks, such as
Soil stabilisation See a b s t r a c t :
23.
Bolts and anchors Freezing 70. E-','A'A~OHN,GS UN IV.A B ~ D ~ q , SCOTLAND,GB BRUCE, DA U N I V . A B ~ , SCOTLAND,GB Rock s~c~rs - state a~ the art. Part two. C~mstruction. 3F,6T. G~O~D M ~ , V S , ~ , S~.197~, P ~ 5 • Anchor c~ustructlca techniques related to ~ r i l l ~ , flushing, water testing, t e n d o n im'eparati~n end i n s t a l l a t i o n are considered. 71. FARMER, IW U N I V . D ~ M , GB S t r e s s distr~utica alomg a resin grou~ed rock s~chor. INT.J.ROCK MECH .MIN.SCI.GEGMECH.ABSTR.VI2,NII,1975, P3~7-3~I.
Grouting 72. JESSOP,PA Grouting materials. IT. C IV.~ G , S ~ ' r . l ~ F25. Particulate em~ cham~csl ~ and ~mthe~Ic remiss ere briefly discussed. A ~ l e is ~Ivem as & Kui~e tO the types em~ their ~ems of application. GAYL~, A GroutlmK practicalities. CIV.~G~G, ~ .197~,P~l.
76. HARRIS,JS REED, RJ Oroun~ f r e e z ~
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B~GM~N, SG G~outing of t u n n e l s t o ~mev~-t .-,-'t "t- scale infil. trat~n,- a N a t i o n a l B u i l d i n g Research Report. In Swedish.35F, ST, 11R.
Cmm~tlve lnt~ttW a ~ i s a msthod o f c t m t e ~ s i n g e m - t h ~ a k e h l s t o W i n t o a m ~ s h o , r l ~ levels at dazms:L~ intensities e ~ 1 ~ r i ~ l and fre%Uency. The m t b o d c c ~ bi~es data from conv~tlonal modified Mercalll isoselamsl