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Design charts for a deep circular tunnel under non-hydrostatic loading
71A 862256 Design charts for a deep circular tunnel under non-hydrostatic loading
St John, C M; Detournay, E; Fairhurst, C In: Rock Mechanics in Productivity and Protection (Proceedings of the Twenty-F@h Symposium on Rock Mechanics, Evanston, Illinois, 25-27 June 1984) P849-856. Pub1 New York: AIME,
1984
The Ground Reaction Curve (GRC) is the relationship between support pressure and induced displacement at a tunnel wall for a circular tunnel under hydrostatic loading. A recent analytical development has allowed the generalisation of the GRC concept for some cases of non-hydrostatic stress fields. Design charts, to assist performing parametric analysis for tunnels subject to non-hydrostatic loading, are presented.
Power plants 862257 Rock support on the Jones Island inline pump station, Milwaukee, Wisconsin
Smirnoff, T P; Lundin. T K In: Rock Mechanics in Proabctivity and Protection (Proceedings of the Twenty-Fijth Symposium on Rock Mechanics, Evanston, Illinois, 25-27 June 1984) P841-848. Pub1 New York: AIME,
1984
The pump chamber for the Jones Island Inline Pump Station, Milwaukee, Wisconsin, USA, was designed with effects of in situ stress and rock mass discontinuities taken into account. Local stresses were estimated by comparison with similar caverns in similar geologic structures nearby. The joint patterns found on excavation were examined before the support system and final lining were designed. A pattern of fully grouted rock bolts supports the roof and sidewalls. The floor and lower sidewalls have a cast-in-place concrete lining, the remainder is shotcreted.
Mines See also: 862122, 862128, 862155, 862173, 862178, 862179 862258 Improvement of potential in mining development and tunnelling systems in the National Coal Board
Tucker, R H Min Engr V144, N285, June 1985, P663-669 An account is given of the current principal items of equipment and systems employed in mining development and tunnelling by the National Coal Board, and the related levels of performance obtained. 862259 Undersea longwall mining subsidence with special reference to geological and water occurrence criteria in the north-east of England coalfield
Aston, T R C; Whittaker, B N Mitt Sci Technol V2, N2, April 1985, PIOS-130 The geology and hydrogeology of the North-East of England coalfield is briefly described. The water yield-predicted tensile strain and geological strain-water relationships occurring at four collieries with extensive undersea workings, Blackhall, Horden, Dawdon and Westoe, are examined in detail. In each case, water occurrences can be correlated with either faces worked in the vicinity of a major fault, or areas where the 0 R.MM.S. 2,‘2--H
amount of cover to the base of the major aquifer horizon thins appreciably, or a well developed, potentially water bearing sandstone horizon existing within the intervening coal measures strata. 862260 Application of ideal&d mine water inflow
analytical techniques for prediction of
Singh, RN; Atkins, A S Mitt Sci Technol V2, N2, April 1985. P131-138 The importance
of designing a mine water control system during the feasibility study stage of a proposed large mining project is highlighted. The analytical techniques available for the prediction of mine water inflow quantities are reviewed. Idealised conceptual models of shaft, surface and underground excavations are incorporated. Analytical formulae for predicting mine water inflows are detailed, together with the conditions under which each equation is valid. Numerical application of these models are also included. 862261 Possible technological changes in mining in the Sudbury Basin, Canada
Jeremic, M L Mitt Sci Technol V2. N3, June 1985, P163-170 To offset losses and achieve a profitable level of nickel production, the mining companies of Sudbury are beginning to implement some changes which include certain techniques such as continuous hydromining, big hole blasting, redesigning of stope layouts, improvement of mine fill consolidation and continuous haulage transport. 862262 Stability behaviour of deep level coal mining tunnels
Heidarieh-Zadeh, A M; Smith, S F Min Sci Technol V2, N3. June 1985. P171-179 Roadway closure assessment is discussed with reference to deformation data obtained from recent investigations. The stability analysis of the mine tunnels/roadways was based on collated data relating to the closure occurring within the lined section of each tunnel at specified distances from the tunnel excavation face. Closure profiles for various tunnels are presented and discussed and comparisons made in a variety of geological conditions. Strength data of the rock types associated with the tunnels are included along with general comments relating to support performances. Prediction of closure is also discussed and comments made on particular problems encountered in making assessment of mine tunnel stability in weak rock conditions. 862263 Chain pillar design for US longwall panels Hsiung, S M; Peng, S S Min Sci Technol V2. N4, Aug 1985, P279-305
A chain pillar design formula under weak roof conditions was developed by statistically analyzing the results from the threedimensional finite element parametric analyses. The parameters such as mechanical properties of the roof and floor strata, overburden depth, panel width and length, and coal strength were incorporated in the formula. Case studies were examined to verify the effectiveness of the formula developed. A conversion formula which transfers a rectangular chain pillar into a square chain pillar of equal strength is proposed. The influence of high in situ horizontal stresses, which are often encountered in the coalfield,on chain pillar stability is also discussed.
1986 Pergamon Press Ltd. Reproduction
not permitted
St John, C M; Detournay, E; Fairhurst, C In: Rock Mechanics in Productivity and Protection (Proceedings of the Twenty-F@h Symposium on Rock Mechanics, Evanston, Illinois, 25-27 June 1984) P849-856. Pub1 New York: AIME,
1984
The Ground Reaction Curve (GRC) is the relationship between support pressure and induced displacement at a tunnel wall for a circular tunnel under hydrostatic loading. A recent analytical development has allowed the generalisation of the GRC concept for some cases of non-hydrostatic stress fields. Design charts, to assist performing parametric analysis for tunnels subject to non-hydrostatic loading, are presented.
Power plants 862257 Rock support on the Jones Island inline pump station, Milwaukee, Wisconsin
Smirnoff, T P; Lundin. T K In: Rock Mechanics in Proabctivity and Protection (Proceedings of the Twenty-Fijth Symposium on Rock Mechanics, Evanston, Illinois, 25-27 June 1984) P841-848. Pub1 New York: AIME,
1984
The pump chamber for the Jones Island Inline Pump Station, Milwaukee, Wisconsin, USA, was designed with effects of in situ stress and rock mass discontinuities taken into account. Local stresses were estimated by comparison with similar caverns in similar geologic structures nearby. The joint patterns found on excavation were examined before the support system and final lining were designed. A pattern of fully grouted rock bolts supports the roof and sidewalls. The floor and lower sidewalls have a cast-in-place concrete lining, the remainder is shotcreted.
Mines See also: 862122, 862128, 862155, 862173, 862178, 862179 862258 Improvement of potential in mining development and tunnelling systems in the National Coal Board
Tucker, R H Min Engr V144, N285, June 1985, P663-669 An account is given of the current principal items of equipment and systems employed in mining development and tunnelling by the National Coal Board, and the related levels of performance obtained. 862259 Undersea longwall mining subsidence with special reference to geological and water occurrence criteria in the north-east of England coalfield
Aston, T R C; Whittaker, B N Mitt Sci Technol V2, N2, April 1985, PIOS-130 The geology and hydrogeology of the North-East of England coalfield is briefly described. The water yield-predicted tensile strain and geological strain-water relationships occurring at four collieries with extensive undersea workings, Blackhall, Horden, Dawdon and Westoe, are examined in detail. In each case, water occurrences can be correlated with either faces worked in the vicinity of a major fault, or areas where the 0 R.MM.S. 2,‘2--H
amount of cover to the base of the major aquifer horizon thins appreciably, or a well developed, potentially water bearing sandstone horizon existing within the intervening coal measures strata. 862260 Application of ideal&d mine water inflow
analytical techniques for prediction of
Singh, RN; Atkins, A S Mitt Sci Technol V2, N2, April 1985. P131-138 The importance
of designing a mine water control system during the feasibility study stage of a proposed large mining project is highlighted. The analytical techniques available for the prediction of mine water inflow quantities are reviewed. Idealised conceptual models of shaft, surface and underground excavations are incorporated. Analytical formulae for predicting mine water inflows are detailed, together with the conditions under which each equation is valid. Numerical application of these models are also included. 862261 Possible technological changes in mining in the Sudbury Basin, Canada
Jeremic, M L Mitt Sci Technol V2. N3, June 1985, P163-170 To offset losses and achieve a profitable level of nickel production, the mining companies of Sudbury are beginning to implement some changes which include certain techniques such as continuous hydromining, big hole blasting, redesigning of stope layouts, improvement of mine fill consolidation and continuous haulage transport. 862262 Stability behaviour of deep level coal mining tunnels
Heidarieh-Zadeh, A M; Smith, S F Min Sci Technol V2, N3. June 1985. P171-179 Roadway closure assessment is discussed with reference to deformation data obtained from recent investigations. The stability analysis of the mine tunnels/roadways was based on collated data relating to the closure occurring within the lined section of each tunnel at specified distances from the tunnel excavation face. Closure profiles for various tunnels are presented and discussed and comparisons made in a variety of geological conditions. Strength data of the rock types associated with the tunnels are included along with general comments relating to support performances. Prediction of closure is also discussed and comments made on particular problems encountered in making assessment of mine tunnel stability in weak rock conditions. 862263 Chain pillar design for US longwall panels Hsiung, S M; Peng, S S Min Sci Technol V2. N4, Aug 1985, P279-305
A chain pillar design formula under weak roof conditions was developed by statistically analyzing the results from the threedimensional finite element parametric analyses. The parameters such as mechanical properties of the roof and floor strata, overburden depth, panel width and length, and coal strength were incorporated in the formula. Case studies were examined to verify the effectiveness of the formula developed. A conversion formula which transfers a rectangular chain pillar into a square chain pillar of equal strength is proposed. The influence of high in situ horizontal stresses, which are often encountered in the coalfield,on chain pillar stability is also discussed.
1986 Pergamon Press Ltd. Reproduction
not permitted