- Email: [email protected]
Model studies of subsidence over room-and-pillar coal mines using holographic interferometry
97A
81~I~6 CONSTRUCTIONAL ~ S IN LARGE H/MPED STORAGE PLANTS Abraham, K H; Lottes, G Int Water Power Dam Constr, V33, NI, Jan
~98~, ~31-35 Dlscus~es the s u p p c ~ of large cavern excavations by the amahor method, absorl~ion of the emd thrust, design of penstocks, sealing problems, downstream storage stations, machinery vibrations. 815147 SHAF9 SINKI~D AT DINCRW'IC TumnTummlg, V13, N~, May1981, P5~-57 A report of the British ~ I n g Society meeting of 19 February 1981 in which sinking operations at Dinorwlc were discussed.
8~5~8 ENDIN~RING ASPECTS OF UNDERGROUND CAV~qN EXCAVATION AT DINORWTC - PART i. GEOLOGY AT DINCRWIC Isaac, I D; Bubb, C Tunn Tunmlg, %'13, N3, April 1981, P20"25 Describes the main geological features stud their Influence ~pon the method amd sequence of excavation add the d r d 1 ~ a r d blasting techniques .~iopted. Also discusses the ez~ineerIng si~d~Icance of the beddlng~ cleavage~ dykes~ dyke margins add other discontin-lties.
815149 ~ A ~ Z C A L / ~ O ~ U C
~CK ~mA~CS
m0GRAM
Sweeney, N F; Davis, J A; Strassburger, A G Proo 21st US Symposium on Rook Mechanics, Rolla, Missouri, 28-30 May 1980, P729-740 Describes preliminary site investigation, in situ testing, geologic mapping, field Instrumentation amd the resulting inter1~etations, for a 1050 MW tuxlergrotmd pt~ped storage facility in the Sierra Nevada, California, USA.
In-situ stresses and stress around underground openings 8~5~5o
OF mAC~t~U~ A~D STm~S DISTmmUTION IN ~AWZZIT~ A~XmD THE llZS-M (370OFT) IAVEL
815152 USE CF DIFFERENTIAL bTRAIN CURVE ANALYSIS IN PREDICTING IN SI~'J STRESS STATE FOR DEEP WELLS b'tricklamd, F G; Ren, N K Proo 21st US Symposium on Rock Mechanics, Rolls, Missouri, 18-20 May 1980, P523-532 Investigates Differeztial Strain Analysis (DSA) as a technique applied to core samples to ~n~rectly determine the In-aitu stress state. Field measurements of strain are made in-situ as the core is pulled out of the well. DSA is performed under in-sltu hydrostatic co=dltlons in the labaratcry, and the rook is examined microscopically. These tests have been performed on both oriented ani ~n-orieuted cores. It appears that a reaso_-~!y acctTate e~timate of the 3-dlmension~l stress s t a t e can be obtained using the DSA method. It has ~een demons~ratel mt&ema+i~sllv t~a+. - a t only the ratio of the stresses can be derived but also the orie:~ation of the stresses in free space. The ap~.ication of these equations to the field data yields results well within the reproducible tolerance of other methods.
Surface subsidence and caving See also: 815128 815153 STUDY OF GROUND CONTROL PRO~TA~MS IN COAL MINES WITH HIGH HCRIZONTAL STRESSES Agapito, J F T; Mitchell, S J; Hardy, M P Proo 21st US Symposium on Rock Mechanics, Rolls, Missouri, 28-30 May 1980, P620-825 Describes measurement of hi@h hcrizortsl s t r e s s e s in the roofs of mines in the Beckley mining district of West Virginia, USA, by overcoring. Numerical modelling was used to (i) demonstrate that overcoring results reflect the in situ stress field, amd (2) evaluate possible changes in mine g e n t r y that m ~ t reduce stress-related roof add floor structural problems. Good a@reement was o b t a i n e d between a 764 element finite element model ani a 135 element displacement discontinuity model.
815i~ STUDY OF MINE SUBSIDENCE AT TWO COLLIERIES IN
OF THE CRES~VT MINE, COEUR D'ALENE MINING DISTRICT, IDAHO Miller, C H; Sk~n~-~, E H EDgDg Geol, VI6~ N3-4~ i~80~ I~21-338
THE SOUTHERN COALFIELD, NEW SOUTH WALES Kapp, W A Proo A u s t r ~ s Inst Min Metall, V276, Dec 1980, PT-11
Discusses overcc~'Ing measurements to determine the in situ stress field a~d permeability measurements b y the air injection technique. Laboratory t e s t s i~licate that the permeabillties determined are due to the fractures. The high permeabllltles are limited to the immediate vicinity of the tur~1.
Presents two case studies of subsidence investigations. The first is a study of subsidence over a series of l o m ~ l~mels in one seam amd the secomi is a study of subsidence over pillar extraction i n two seams, one above the other. From the results of the investigation the effects of panel widths on subsidence are determined.
815151 FURDN~ENTAL CONCEPT OF DESIGNIR~ TUNNEL ~XPPORTS IN CONSIDERATION OF ELASTO-PLASTIC AND STRAIN SO~'A'~rlI~G B~AVIOUR OF ROCE T ~ m n t o , C; Hsta, S Mere Fac Engmg Eyoto Univ, V~2, ~ , Oct 1980, P3A~-376 Uses an elastic-~lastic model to design a support system imcl~dlng rook bolts anl shotcrete, using the idea of replacing the supports by an inner pressure acting on the surface of the tnlnnel wall. Discusses the half-d~ne action of the face ard t h e elasto-plastic behaviour of the rock mass.
815155 MC~EL STUDIES OF SUBSIDENCE OVER ROOM-AND-PILLAR COAL MINES USING EOLOGRAPHIC IETERFERCk~I~Z Park, D W Proo 21st US Symposium on Rock Mechanics, Rolla, Missouri, 28-30 May 1980, P265-274 Describes the use of holcgral~hic interferometry in analysis of subsidence. Models of samd add gelatin were u s e d t o simulate either fractured overburden cr rook with elastic characteristics. Extraction ratios and P~r~!-width/depth-topanel ratios, are shown to affect the subsidence factar. The experiments are considered to demonstrafe the usefulness of the technique as applied to rocm-anl-pillar mines.
81~I~6 CONSTRUCTIONAL ~ S IN LARGE H/MPED STORAGE PLANTS Abraham, K H; Lottes, G Int Water Power Dam Constr, V33, NI, Jan
~98~, ~31-35 Dlscus~es the s u p p c ~ of large cavern excavations by the amahor method, absorl~ion of the emd thrust, design of penstocks, sealing problems, downstream storage stations, machinery vibrations. 815147 SHAF9 SINKI~D AT DINCRW'IC TumnTummlg, V13, N~, May1981, P5~-57 A report of the British ~ I n g Society meeting of 19 February 1981 in which sinking operations at Dinorwlc were discussed.
8~5~8 ENDIN~RING ASPECTS OF UNDERGROUND CAV~qN EXCAVATION AT DINORWTC - PART i. GEOLOGY AT DINCRWIC Isaac, I D; Bubb, C Tunn Tunmlg, %'13, N3, April 1981, P20"25 Describes the main geological features stud their Influence ~pon the method amd sequence of excavation add the d r d 1 ~ a r d blasting techniques .~iopted. Also discusses the ez~ineerIng si~d~Icance of the beddlng~ cleavage~ dykes~ dyke margins add other discontin-lties.
815149 ~ A ~ Z C A L / ~ O ~ U C
~CK ~mA~CS
m0GRAM
Sweeney, N F; Davis, J A; Strassburger, A G Proo 21st US Symposium on Rook Mechanics, Rolla, Missouri, 28-30 May 1980, P729-740 Describes preliminary site investigation, in situ testing, geologic mapping, field Instrumentation amd the resulting inter1~etations, for a 1050 MW tuxlergrotmd pt~ped storage facility in the Sierra Nevada, California, USA.
In-situ stresses and stress around underground openings 8~5~5o
OF mAC~t~U~ A~D STm~S DISTmmUTION IN ~AWZZIT~ A~XmD THE llZS-M (370OFT) IAVEL
815152 USE CF DIFFERENTIAL bTRAIN CURVE ANALYSIS IN PREDICTING IN SI~'J STRESS STATE FOR DEEP WELLS b'tricklamd, F G; Ren, N K Proo 21st US Symposium on Rock Mechanics, Rolls, Missouri, 18-20 May 1980, P523-532 Investigates Differeztial Strain Analysis (DSA) as a technique applied to core samples to ~n~rectly determine the In-aitu stress state. Field measurements of strain are made in-situ as the core is pulled out of the well. DSA is performed under in-sltu hydrostatic co=dltlons in the labaratcry, and the rook is examined microscopically. These tests have been performed on both oriented ani ~n-orieuted cores. It appears that a reaso_-~!y acctTate e~timate of the 3-dlmension~l stress s t a t e can be obtained using the DSA method. It has ~een demons~ratel mt&ema+i~sllv t~a+. - a t only the ratio of the stresses can be derived but also the orie:~ation of the stresses in free space. The ap~.ication of these equations to the field data yields results well within the reproducible tolerance of other methods.
Surface subsidence and caving See also: 815128 815153 STUDY OF GROUND CONTROL PRO~TA~MS IN COAL MINES WITH HIGH HCRIZONTAL STRESSES Agapito, J F T; Mitchell, S J; Hardy, M P Proo 21st US Symposium on Rock Mechanics, Rolls, Missouri, 28-30 May 1980, P620-825 Describes measurement of hi@h hcrizortsl s t r e s s e s in the roofs of mines in the Beckley mining district of West Virginia, USA, by overcoring. Numerical modelling was used to (i) demonstrate that overcoring results reflect the in situ stress field, amd (2) evaluate possible changes in mine g e n t r y that m ~ t reduce stress-related roof add floor structural problems. Good a@reement was o b t a i n e d between a 764 element finite element model ani a 135 element displacement discontinuity model.
815i~ STUDY OF MINE SUBSIDENCE AT TWO COLLIERIES IN
OF THE CRES~VT MINE, COEUR D'ALENE MINING DISTRICT, IDAHO Miller, C H; Sk~n~-~, E H EDgDg Geol, VI6~ N3-4~ i~80~ I~21-338
THE SOUTHERN COALFIELD, NEW SOUTH WALES Kapp, W A Proo A u s t r ~ s Inst Min Metall, V276, Dec 1980, PT-11
Discusses overcc~'Ing measurements to determine the in situ stress field a~d permeability measurements b y the air injection technique. Laboratory t e s t s i~licate that the permeabillties determined are due to the fractures. The high permeabllltles are limited to the immediate vicinity of the tur~1.
Presents two case studies of subsidence investigations. The first is a study of subsidence over a series of l o m ~ l~mels in one seam amd the secomi is a study of subsidence over pillar extraction i n two seams, one above the other. From the results of the investigation the effects of panel widths on subsidence are determined.
815151 FURDN~ENTAL CONCEPT OF DESIGNIR~ TUNNEL ~XPPORTS IN CONSIDERATION OF ELASTO-PLASTIC AND STRAIN SO~'A'~rlI~G B~AVIOUR OF ROCE T ~ m n t o , C; Hsta, S Mere Fac Engmg Eyoto Univ, V~2, ~ , Oct 1980, P3A~-376 Uses an elastic-~lastic model to design a support system imcl~dlng rook bolts anl shotcrete, using the idea of replacing the supports by an inner pressure acting on the surface of the tnlnnel wall. Discusses the half-d~ne action of the face ard t h e elasto-plastic behaviour of the rock mass.
815155 MC~EL STUDIES OF SUBSIDENCE OVER ROOM-AND-PILLAR COAL MINES USING EOLOGRAPHIC IETERFERCk~I~Z Park, D W Proo 21st US Symposium on Rock Mechanics, Rolla, Missouri, 28-30 May 1980, P265-274 Describes the use of holcgral~hic interferometry in analysis of subsidence. Models of samd add gelatin were u s e d t o simulate either fractured overburden cr rook with elastic characteristics. Extraction ratios and P~r~!-width/depth-topanel ratios, are shown to affect the subsidence factar. The experiments are considered to demonstrafe the usefulness of the technique as applied to rocm-anl-pillar mines.