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Design and installation of large diameter subsea connecting shafts for the seabrook station cooling water system
35A
822132 PRECAST CONCRETE LINERS FOR RLINI>-DRI~J.~ SHAleS Sko~berg, E R CIM Blzll, V74, N830, June 1981, I~6-51 Describes a mew method of lining blind-drilled shafts with precast concrete cyllmdrical sections, to produce a dry and hydrostatically lined shaft. Outlines the design, production and installation of these se~nents. 822133 INFLUENCE OF COAL RIB P'n'.I".ARWIDTH ON THE STABILITY OF STRATA AROUND THE FACE-END AND GAT~EAD IN LOEb"WALL MINING Szwilskl, T B CIM Bttll, V74, N830, June 1981, P65-71 The performance of mechanised packing systems is briefly discussed. The results of gateroad deformation surveys on two coal mines to determine the influence of rib l~llar width on gateroad s%abillty, stud of gateside pack on surro,,--~ng strata are presented. It was found that crush pillars of width O-4m gave effective gateroad suppcrt, and that crush pillars of width 4-10m decreased the gateroad stability. Recommendations are also made fc~ suitable face-and geometry amd roof strata reinforcement. 822134 PRACTICAL APPROACH TO V ~ C A L CR~ R~T MINING IN SOFT GROUND AT W H I T ~ R S E COPPER Janssems, J J; Percival~ P W CIM BttlI, VT~, N830, June 1981, P72-78 Describes the implementation of vertical crater retreat mining at Whitehorse Copper mine, Yukon. This was as an alternative to the previous method used of longhole open stoping, since subsidence amd caving resulted due to ground conditions. 822135 G E O M ~ I C AND DYNAMIC ANALYSIS OF SOME FAULTS IN THE WESTERN COALFIELD OF NEW SOUTH WALES Shepherd, J; Creasey, J W; Huntimgton, J F Proc Australas Inst Min Metall, N279, Sept 1981, P19-32 Structural mapping was carried out on the Lithgow and Katoomba seams of the Western Coalfield. Orientation of faults and coal cleats are prasented on stereoplots amd histograms, as a basis for an analysis of fault dynamics. 822136 MINING INDUCED CLEAVAGE, CLEATS AND INSTANTANEOUS ODTBURSTS IN THE GEMINI SEAM AT LEICHHABDT COLLIERY, BLACKWATER, QUEENSLAND Hanes, J; S~epherd, J Proc Australas Inst Min Mets/l, N277, March 1981, P17-26 Studies at the Lelchhardt Colliery reveal four distinct fracture sets: 'butt' cleats, face cleats, shallow dipping faults and mining induced cleavage. Microscopic examination of samples confirms this amd the mature of these fracture sets is discussed. Observations indicate that mining induced cleavages tend to begin or terminate at the Junctions or boundaries of butt cleats, dull coal a~/c~ vltrite layers. It is postulated that the butt cleats act as Griffith flaws in the initiation of some cleavages. Outbursts of coal and gas at the mine occur only in areas where c-e~vage is induced by mining.
822137 EVOLUTION IN DESIGN OF LONGHOLE OPEN STOPING AT ZINC CORPORATION L ~ / I ~ W BROKEN HILL CONSOLIDATED LIMITED MINES WITH PARTICULAR REFERENCE TO ~ O P E D WALL MINING Smaniotto, L; Solomons, S S; Til1,~kn, V H Proc Australas Inst Min Metall, N277, March
1981, P35-43 Describes the icmghole open atoping operations at the mines. Outlines the rock mechanics investigation carried out before atoping began. The developed sloped wall lor~ole stoplng method should allow complete extraction of the ore body without ,.he fc~mulatlon of pillars and with minimal dilution of the ore with sg_nd fill.
822138 DESIGN AND I N S T A I ~ I O N OF LARGE D I A M ~ SUBSEA CONNECTING SHAFTS FOR THE SEAHROOK STATION COOLING WATER SY&T~4 Hulshizer, A J; Nossereau, J P Proc 5th Rapid Excavation and Turmeling Conference, San Francisco, 3-7 May 198, V2, P902-929. Publ New York: AD4E, 1981 Describes ~he design and installation of a series of contacting shafts (eleven l.Sm diameter and three 2.87m diameter shafts). Specifications for materials and equipment used are given. Construction of the intake and discharge shafts is described. 822139 DESIGN AND CONSTRUCTION OF SHA~S BY THE WET METHOD Gill, S A Proc 5th Rapid Excavation and Tumncling Conference, San Francisco, 3-7 May 1981, V2, P930-951. Publ New York: AIME, 1981 The method of installing small diameter rock bearing piles has been adapted for shaft sinking in similar conditions fer the TARP project, Chicago, Illinois, USA: this involves flooding of the mhaft during excavation. Construction of the shafts for the TARP project is described. The lateral pressures acting on the shelf lining are considered and in the light of this the design features of casing used in the project are given.
822z4o SHAFT SINKING AT NOSE ROCK Greenslade, J O; Tilley, C; Griswold, G G Proc ~th Rapid Excavation and Ttmnellng Conference, San Francisco, 3-7 May 1981, V2, P955-9~7. Publ New York: AIME, 1981 Describes the method of shaft sinking used at Nose Rock, New Mexico where layers of sedimentary sandstone and shales contain several aquifers. The use of chemical grouting to reduce water inflows from these aquifers and the pumping system used are described. 8221~i SHAFT SINKING CONCEITS AND TWO INDEPENDENT SYSTEMS OF CONCURRENT DEVELOPMENT THROUGH THE SHAFTS BEING Nel, P J L Proc 5th Rapid Excavation and Tunneling Conferemce, San Francisco, 3.-7 May 1961, V2, P976-995. Publ New York. AIME, 1981 Describes several successful concepts used in the sir~ing of shafts on the Elandsramd Gold Mine, South Africa. The re s~alti~g alteration to the production schedule emphasises the need to develop methods to urzlertak~ shaft sinkimg and development simultaneously.
822132 PRECAST CONCRETE LINERS FOR RLINI>-DRI~J.~ SHAleS Sko~berg, E R CIM Blzll, V74, N830, June 1981, I~6-51 Describes a mew method of lining blind-drilled shafts with precast concrete cyllmdrical sections, to produce a dry and hydrostatically lined shaft. Outlines the design, production and installation of these se~nents. 822133 INFLUENCE OF COAL RIB P'n'.I".ARWIDTH ON THE STABILITY OF STRATA AROUND THE FACE-END AND GAT~EAD IN LOEb"WALL MINING Szwilskl, T B CIM Bttll, V74, N830, June 1981, P65-71 The performance of mechanised packing systems is briefly discussed. The results of gateroad deformation surveys on two coal mines to determine the influence of rib l~llar width on gateroad s%abillty, stud of gateside pack on surro,,--~ng strata are presented. It was found that crush pillars of width O-4m gave effective gateroad suppcrt, and that crush pillars of width 4-10m decreased the gateroad stability. Recommendations are also made fc~ suitable face-and geometry amd roof strata reinforcement. 822134 PRACTICAL APPROACH TO V ~ C A L CR~ R~T MINING IN SOFT GROUND AT W H I T ~ R S E COPPER Janssems, J J; Percival~ P W CIM BttlI, VT~, N830, June 1981, P72-78 Describes the implementation of vertical crater retreat mining at Whitehorse Copper mine, Yukon. This was as an alternative to the previous method used of longhole open stoping, since subsidence amd caving resulted due to ground conditions. 822135 G E O M ~ I C AND DYNAMIC ANALYSIS OF SOME FAULTS IN THE WESTERN COALFIELD OF NEW SOUTH WALES Shepherd, J; Creasey, J W; Huntimgton, J F Proc Australas Inst Min Metall, N279, Sept 1981, P19-32 Structural mapping was carried out on the Lithgow and Katoomba seams of the Western Coalfield. Orientation of faults and coal cleats are prasented on stereoplots amd histograms, as a basis for an analysis of fault dynamics. 822136 MINING INDUCED CLEAVAGE, CLEATS AND INSTANTANEOUS ODTBURSTS IN THE GEMINI SEAM AT LEICHHABDT COLLIERY, BLACKWATER, QUEENSLAND Hanes, J; S~epherd, J Proc Australas Inst Min Mets/l, N277, March 1981, P17-26 Studies at the Lelchhardt Colliery reveal four distinct fracture sets: 'butt' cleats, face cleats, shallow dipping faults and mining induced cleavage. Microscopic examination of samples confirms this amd the mature of these fracture sets is discussed. Observations indicate that mining induced cleavages tend to begin or terminate at the Junctions or boundaries of butt cleats, dull coal a~/c~ vltrite layers. It is postulated that the butt cleats act as Griffith flaws in the initiation of some cleavages. Outbursts of coal and gas at the mine occur only in areas where c-e~vage is induced by mining.
822137 EVOLUTION IN DESIGN OF LONGHOLE OPEN STOPING AT ZINC CORPORATION L ~ / I ~ W BROKEN HILL CONSOLIDATED LIMITED MINES WITH PARTICULAR REFERENCE TO ~ O P E D WALL MINING Smaniotto, L; Solomons, S S; Til1,~kn, V H Proc Australas Inst Min Metall, N277, March
1981, P35-43 Describes the icmghole open atoping operations at the mines. Outlines the rock mechanics investigation carried out before atoping began. The developed sloped wall lor~ole stoplng method should allow complete extraction of the ore body without ,.he fc~mulatlon of pillars and with minimal dilution of the ore with sg_nd fill.
822138 DESIGN AND I N S T A I ~ I O N OF LARGE D I A M ~ SUBSEA CONNECTING SHAFTS FOR THE SEAHROOK STATION COOLING WATER SY&T~4 Hulshizer, A J; Nossereau, J P Proc 5th Rapid Excavation and Turmeling Conference, San Francisco, 3-7 May 198, V2, P902-929. Publ New York: AD4E, 1981 Describes ~he design and installation of a series of contacting shafts (eleven l.Sm diameter and three 2.87m diameter shafts). Specifications for materials and equipment used are given. Construction of the intake and discharge shafts is described. 822139 DESIGN AND CONSTRUCTION OF SHA~S BY THE WET METHOD Gill, S A Proc 5th Rapid Excavation and Tumncling Conference, San Francisco, 3-7 May 1981, V2, P930-951. Publ New York: AIME, 1981 The method of installing small diameter rock bearing piles has been adapted for shaft sinking in similar conditions fer the TARP project, Chicago, Illinois, USA: this involves flooding of the mhaft during excavation. Construction of the shafts for the TARP project is described. The lateral pressures acting on the shelf lining are considered and in the light of this the design features of casing used in the project are given.
822z4o SHAFT SINKING AT NOSE ROCK Greenslade, J O; Tilley, C; Griswold, G G Proc ~th Rapid Excavation and Ttmnellng Conference, San Francisco, 3-7 May 1981, V2, P955-9~7. Publ New York: AIME, 1981 Describes the method of shaft sinking used at Nose Rock, New Mexico where layers of sedimentary sandstone and shales contain several aquifers. The use of chemical grouting to reduce water inflows from these aquifers and the pumping system used are described. 8221~i SHAFT SINKING CONCEITS AND TWO INDEPENDENT SYSTEMS OF CONCURRENT DEVELOPMENT THROUGH THE SHAFTS BEING Nel, P J L Proc 5th Rapid Excavation and Tunneling Conferemce, San Francisco, 3.-7 May 1961, V2, P976-995. Publ New York. AIME, 1981 Describes several successful concepts used in the sir~ing of shafts on the Elandsramd Gold Mine, South Africa. The re s~alti~g alteration to the production schedule emphasises the need to develop methods to urzlertak~ shaft sinkimg and development simultaneously.