- Email: [email protected]
Tunnel rock bolting adjacent to a slope
22A
851187 Rock tunnels and rock reinforcement Sinha, R S; Schoeman, K D Proc International Symposium on Rock Bolting, Abisko, 28 August-2 September 1983 P333-344. Publ Rotterdam: A. A. Balkema, 1984 Discusses the design of external tunnel support systems such as steel sets, cast-in-place concrete linings and precast linings, and the design of internal support for rock reinforcement such as bolts and anchors. 851188 Tunnel rock bolting adjacent to a slope Michelis, P Proc International Symposium on Rock Bolting, Abisko, 28 August-2 September 1983 P397-401. Publ Rotterdam: A. A. Balkema, 1984 A small shallow tunnel in limestone was designed. The axis of the tunnel was nearly parallel to the slope, as well as to the steeply inclined faults crossing the roof and the surrounding rock mass. Long, almost horizontal, tensioned and grouted bolts were proposed as a permanent support. The shear strength characteristics along the faults were also defined by the use of Mindlin's equations whereas the necessary tensioning of the bolts was numerically calculated in order to generate normal stress upon the faults preventing movement of the rock blocks during and after the excavation. The main objective was to increase adequately the shear strength along weak zones and stabilize the slope. 851189 Mining improvement with Swellex Wijk, G; Skogberg, B Proc International Symposium on Rock Bolting, Abisko, 28 August°2 September 1983 P439-443. Publ Rotterdam." A. A. Balkema, 1984 The Swellex rock bolting system opens new possibilities for mining. A particular example is considered in which mine safety and productivity are improved simultaneously. Furthermore the mine roof movements are not only actively controlled by the bolts but can also be accurately measured with special Swellex ground movement monitoring bolts placed in strategic positions among the other, ordinary bolts. Auth.
851190 Cable support of lead open stope hangingwalls at Mount lsa Mines Limited Bywater, S; Fuller, P (3 Proc International Symposium on Rock Bolting, Abisko, 28 August-2 September 1983 P539-555. Publ Rotterdam: A. A. Balkema, 1984 Hangingwall failures have occurred in the open stopes of Mount Isa Mines, Australia, despite the use of cable supports. A research programme into the mechanics of cable support has been instigated and 2 new approaches to design are being developed at test areas at Mount Isa.
851191 Temporary support for a deep excavation at North Point, Hong Kong Morton. K: Sayer, P R; Lain, K M; Wu, S H Proc ISRM Symposium on Design and Performance of Underground Exem~ations, Cambridge, 3-6 Sept 1984 P347352. Publ London: British Geotechnical Society, 1984 An underground railway station has been constructed at a depth of 40m below a dense urban environment at North Point, Hong Kong. The water pressure present was considered to be of particular significance in the excavation design and a detailed investigation of the hydrogeology of the site was carried out. It
was found that water pressures in the less weathered rock at depth reduced as a function of the height of water in the overlying soils and heavily weathered rock and of the permeability of the rock itself. The use of measured water pressures reduced the required anchor capacity by up to 30'~i,.
851192 Support for underground openings in poor rock in a Jinchuan nickel mine Yu Xuefu; Li Jiangong Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P361365. Publ London: British Geotechnical SocieO', 1984 Various types of underground support have failed one after another during the development of an opening in the Jinchuan Mine, China, because an incorrect support principle was used. Based on new principles put forward for poor rocks, a new design method for support has been proposed - the 'Two-steps Control Supporting Method'. Shotcrete and bolting support are installed first, and the displacement of the rock and lining are monitored. If these displacements exceed certain values then the second step support of shotcrete and steel net is applied.
Geological factors o f importance in underground excavations 851193 Mechanical features of underground hydraulic structures in permafrost Gevirtz, G Y Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P353359. Publ London: British Geotechnical SocieO'. 1984 Physical and mechanical properties of the permafrost rock mass and the influence of the construction and operation of underground excavations on them are discussed. The main conditions for the modelling of permafrost thaw are given. The characteristics of rock pressure and the factors affecting it are determined. It is shown that as a support method in permafrost, bolts have several advantages over reinforced concrete linings.
Construction methods 851194 Modern methods of construction in the Soviet Union of large underground hydrotechnicai structures of the chamber type Dmitriyev, N V; Mostkov, V M; Potapov, Y F; Stepanov, P D Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P263272. Publ London: British Geotechnical SocieO,, 1984 Methods of construction of underground chambers, including linings, in hard, medium hard and soft rocks are described.
851195 Evaluation of alternative shaft sinking methods for nuclear waste repositories Gonano, L P; Phillips, S Proc 6th Rapid Excavation and Tunneling Conference, Chicago, 12-16 June 1983 II2, P1025-I046. Publ New York." AIME, 1983 Vertical circular shafts have been proposed for multiple access to high level nuclear waste deep geologic repositories. A comparative evaluation of conventional and mechanised shaft sinking techniques is presented for both 'hard rock' and "salt" type sites. Drill-and-blast, ream-and-slash, blind drilling, blind boring and raise-reaming methods are reviewed. For the shaft
851187 Rock tunnels and rock reinforcement Sinha, R S; Schoeman, K D Proc International Symposium on Rock Bolting, Abisko, 28 August-2 September 1983 P333-344. Publ Rotterdam: A. A. Balkema, 1984 Discusses the design of external tunnel support systems such as steel sets, cast-in-place concrete linings and precast linings, and the design of internal support for rock reinforcement such as bolts and anchors. 851188 Tunnel rock bolting adjacent to a slope Michelis, P Proc International Symposium on Rock Bolting, Abisko, 28 August-2 September 1983 P397-401. Publ Rotterdam: A. A. Balkema, 1984 A small shallow tunnel in limestone was designed. The axis of the tunnel was nearly parallel to the slope, as well as to the steeply inclined faults crossing the roof and the surrounding rock mass. Long, almost horizontal, tensioned and grouted bolts were proposed as a permanent support. The shear strength characteristics along the faults were also defined by the use of Mindlin's equations whereas the necessary tensioning of the bolts was numerically calculated in order to generate normal stress upon the faults preventing movement of the rock blocks during and after the excavation. The main objective was to increase adequately the shear strength along weak zones and stabilize the slope. 851189 Mining improvement with Swellex Wijk, G; Skogberg, B Proc International Symposium on Rock Bolting, Abisko, 28 August°2 September 1983 P439-443. Publ Rotterdam." A. A. Balkema, 1984 The Swellex rock bolting system opens new possibilities for mining. A particular example is considered in which mine safety and productivity are improved simultaneously. Furthermore the mine roof movements are not only actively controlled by the bolts but can also be accurately measured with special Swellex ground movement monitoring bolts placed in strategic positions among the other, ordinary bolts. Auth.
851190 Cable support of lead open stope hangingwalls at Mount lsa Mines Limited Bywater, S; Fuller, P (3 Proc International Symposium on Rock Bolting, Abisko, 28 August-2 September 1983 P539-555. Publ Rotterdam: A. A. Balkema, 1984 Hangingwall failures have occurred in the open stopes of Mount Isa Mines, Australia, despite the use of cable supports. A research programme into the mechanics of cable support has been instigated and 2 new approaches to design are being developed at test areas at Mount Isa.
851191 Temporary support for a deep excavation at North Point, Hong Kong Morton. K: Sayer, P R; Lain, K M; Wu, S H Proc ISRM Symposium on Design and Performance of Underground Exem~ations, Cambridge, 3-6 Sept 1984 P347352. Publ London: British Geotechnical Society, 1984 An underground railway station has been constructed at a depth of 40m below a dense urban environment at North Point, Hong Kong. The water pressure present was considered to be of particular significance in the excavation design and a detailed investigation of the hydrogeology of the site was carried out. It
was found that water pressures in the less weathered rock at depth reduced as a function of the height of water in the overlying soils and heavily weathered rock and of the permeability of the rock itself. The use of measured water pressures reduced the required anchor capacity by up to 30'~i,.
851192 Support for underground openings in poor rock in a Jinchuan nickel mine Yu Xuefu; Li Jiangong Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P361365. Publ London: British Geotechnical SocieO', 1984 Various types of underground support have failed one after another during the development of an opening in the Jinchuan Mine, China, because an incorrect support principle was used. Based on new principles put forward for poor rocks, a new design method for support has been proposed - the 'Two-steps Control Supporting Method'. Shotcrete and bolting support are installed first, and the displacement of the rock and lining are monitored. If these displacements exceed certain values then the second step support of shotcrete and steel net is applied.
Geological factors o f importance in underground excavations 851193 Mechanical features of underground hydraulic structures in permafrost Gevirtz, G Y Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P353359. Publ London: British Geotechnical SocieO'. 1984 Physical and mechanical properties of the permafrost rock mass and the influence of the construction and operation of underground excavations on them are discussed. The main conditions for the modelling of permafrost thaw are given. The characteristics of rock pressure and the factors affecting it are determined. It is shown that as a support method in permafrost, bolts have several advantages over reinforced concrete linings.
Construction methods 851194 Modern methods of construction in the Soviet Union of large underground hydrotechnicai structures of the chamber type Dmitriyev, N V; Mostkov, V M; Potapov, Y F; Stepanov, P D Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P263272. Publ London: British Geotechnical SocieO,, 1984 Methods of construction of underground chambers, including linings, in hard, medium hard and soft rocks are described.
851195 Evaluation of alternative shaft sinking methods for nuclear waste repositories Gonano, L P; Phillips, S Proc 6th Rapid Excavation and Tunneling Conference, Chicago, 12-16 June 1983 II2, P1025-I046. Publ New York." AIME, 1983 Vertical circular shafts have been proposed for multiple access to high level nuclear waste deep geologic repositories. A comparative evaluation of conventional and mechanised shaft sinking techniques is presented for both 'hard rock' and "salt" type sites. Drill-and-blast, ream-and-slash, blind drilling, blind boring and raise-reaming methods are reviewed. For the shaft