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Bladeshield tunnelling machine extrudes its own lining
84A
Tunnels
ln-situ stresses and stress around underground openings
See also: 824185 See also: 824091 82~099 RENOVATION OF THE NEGRESSE TUNNEL Andrews, W Tunn Tunnlg, V14, N3, April 1982, P36-38 Presents a case hlstcry of the renovation of the Negresse Turmel, Biarritz, France. This included regeneration of the tunnel liming with shoterete reinforced with a sheet of welded mesh. The roof was reinforced w-lth cast-iron arches. CONSTRUCTION OF THE TYNE AND WEAR METRO Tunn Tunnlg, VI4, N2, March 1982, P15-18 Discusses the text ani discussion of 3 papers presented by the contractors to a British Tura~elling Society meeting~ in November 1981. 82~I01 RACE AGAINST TIME AT THE VICTORIA TUNNEL Martin, D Turm Tunnlg, V14, N2, March 1982, P26-31 Construction of the power tunnel for the Victoria Dam hydroelectric and irrigation project is behind schedule. This is due to slow mob~lisation, supply difficulties, plant probl~s, and a tunnel collapse due to an unknown fault in the limestone which tapped an underground reservoir. 82~I02 STRAWBERRY COLLECTION SYSTEM TAPS THE SWEET WATERS OF UTAH's UINTAS MOUNTAINS Tunn Tunnlg, V14, N2, March 1982, P32 A water tunnel is being constructed near Salt Lake City~ Utah, USA. Varying conditions in the rock strata have been a great problem and about 50 per cent of the tunnel has been stabilised with the new Split Set rock stabilising system.
82~103 BLADE SHIELD TUNNNWIINO MACHINE EXTRUDES ITs OWN LINING Martin~ D; Brown~ W M Tunn Tunnlg, VI4, N2, March 1982, P54-56 Describes a machine which tunnels at one end and extrudes a single shell continuous steel fibre reinforced concrete liming at the other end, and is steered by a computer. The machine is drivimg metro turm~is in Frankfurt, West Ge~mmr~ and results so far indicate the liming is cheaper than a sprayed concrete shell with arches and wire mesh. The method has also eliminated settlements almost completely. 824104 SIMPLIFIED STATIC CALCULATION OF q~E TUNNEL ROOF IN NON-FISSUReD ROCK (IN G E F ~ ) Kolymb as, D Rock Mech, VI4, h~, Feb 1982, P201-207 A theory is presented which establishes a relationship between the shear parameters (cohesion and a~gle of friction) of the ground as measured in the labc~'atcry amd the stability of a tunnel. The bearing action of shotcrete liming on a tunnel is also analysed.
Power plants See: 82419~
824105 sIMPLE EXPLANATION OF ROCK PRESSURE PHENOMENA IN c o ~ F A ~ S usiNG ~ sum~Ts A~ mm~xc PRoPs (IN C~I~SE) Wang Xiamgl~/~ Zhao Hongzhu Coal Sci Teehnol, N1, 1961, P10-15 Rock presst~Ce phenomena differ due to different wo~'king p a t e n s , loads, advaz~e rates, and adaptability to geological conditions at different sites. The same values do occur in the foll~rlng: (i) distance between the powered support and cavlr4~ area ard (2) the l~oportion of top subsidence to the distance to the coal face, seam helg~t, and advance rate. Differing val~es occur for top subsidence, working load dis~iblltion~ stability of the roof, amd l~essure of the support on the floor ar~ roof. 824106 P R C ~ U C T M T Y PROBLEM IN DRIVAGES IN BURST-PRONE SEAMS (IN RUSSIAN) sushko, I L Shskhtnoe Stroit, NS, Aug 1981, P13-17 New methods of outburst p r e v e ~ i o n in worked seams, which will not affect l~oductivlty too much, have been suggested. The basic idea of these methods is to l~oduce a relief cavity in the rock surrourding the seam using boas heading machines. Face slots are also cut. 824107 INCREASED USE OF MECHANISED HEADING IN OUTBURSTPRONE SEAMS (IN RUSSIAN) Bolshlnskii, M I Shakhtnoe S~Oit, N7, July 1981, P5-7 The latest trend in outburst prevention is to produce wall cavities so that the roadhead is destressed by prior extraction of rock abOve and below the seam. A specislly tooled machine has been developed specifically for this purpose. It is s~gested that the method can be adapted so that a conventional heading machine could be used. This ~dapted method has been tried out with good advance rates obtained. 824108 ACCESSING OUIrBURST-PRONE SEAMS AT DONBASS DEEP LEVELs (IN RUSSIAN) Khorur~hii~ Y T; Fridman, I S Shakhtnoe Stroit~ N5, May 1981, P27-28 Describes measures used in the D o , ass mines, Russia, to prevent outbursts. One populsr method involves flushing out a cavity in the seam, gas is emitted during this operation and this tends to stabilise the coal. 824109 ROOF ROCK BURST HAZARD IN THE CONTEXT OF A CLOSER K N G W L m ~ E OF NATURAL AND M n n N G C O N D ~ I O N S (IN POLISH) Bilinski, A Gornlctwo, VS, NI, 1981, P69-92 The risk of a roof rock burst is proportiorml to the maximum magnltUde of rock mass tremor that can occur during mining of a given lot@wall panel. A method of estimating the risk of rock burst is presentad.
Tunnels
ln-situ stresses and stress around underground openings
See also: 824185 See also: 824091 82~099 RENOVATION OF THE NEGRESSE TUNNEL Andrews, W Tunn Tunnlg, V14, N3, April 1982, P36-38 Presents a case hlstcry of the renovation of the Negresse Turmel, Biarritz, France. This included regeneration of the tunnel liming with shoterete reinforced with a sheet of welded mesh. The roof was reinforced w-lth cast-iron arches. CONSTRUCTION OF THE TYNE AND WEAR METRO Tunn Tunnlg, VI4, N2, March 1982, P15-18 Discusses the text ani discussion of 3 papers presented by the contractors to a British Tura~elling Society meeting~ in November 1981. 82~I01 RACE AGAINST TIME AT THE VICTORIA TUNNEL Martin, D Turm Tunnlg, V14, N2, March 1982, P26-31 Construction of the power tunnel for the Victoria Dam hydroelectric and irrigation project is behind schedule. This is due to slow mob~lisation, supply difficulties, plant probl~s, and a tunnel collapse due to an unknown fault in the limestone which tapped an underground reservoir. 82~I02 STRAWBERRY COLLECTION SYSTEM TAPS THE SWEET WATERS OF UTAH's UINTAS MOUNTAINS Tunn Tunnlg, V14, N2, March 1982, P32 A water tunnel is being constructed near Salt Lake City~ Utah, USA. Varying conditions in the rock strata have been a great problem and about 50 per cent of the tunnel has been stabilised with the new Split Set rock stabilising system.
82~103 BLADE SHIELD TUNNNWIINO MACHINE EXTRUDES ITs OWN LINING Martin~ D; Brown~ W M Tunn Tunnlg, VI4, N2, March 1982, P54-56 Describes a machine which tunnels at one end and extrudes a single shell continuous steel fibre reinforced concrete liming at the other end, and is steered by a computer. The machine is drivimg metro turm~is in Frankfurt, West Ge~mmr~ and results so far indicate the liming is cheaper than a sprayed concrete shell with arches and wire mesh. The method has also eliminated settlements almost completely. 824104 SIMPLIFIED STATIC CALCULATION OF q~E TUNNEL ROOF IN NON-FISSUReD ROCK (IN G E F ~ ) Kolymb as, D Rock Mech, VI4, h~, Feb 1982, P201-207 A theory is presented which establishes a relationship between the shear parameters (cohesion and a~gle of friction) of the ground as measured in the labc~'atcry amd the stability of a tunnel. The bearing action of shotcrete liming on a tunnel is also analysed.
Power plants See: 82419~
824105 sIMPLE EXPLANATION OF ROCK PRESSURE PHENOMENA IN c o ~ F A ~ S usiNG ~ sum~Ts A~ mm~xc PRoPs (IN C~I~SE) Wang Xiamgl~/~ Zhao Hongzhu Coal Sci Teehnol, N1, 1961, P10-15 Rock presst~Ce phenomena differ due to different wo~'king p a t e n s , loads, advaz~e rates, and adaptability to geological conditions at different sites. The same values do occur in the foll~rlng: (i) distance between the powered support and cavlr4~ area ard (2) the l~oportion of top subsidence to the distance to the coal face, seam helg~t, and advance rate. Differing val~es occur for top subsidence, working load dis~iblltion~ stability of the roof, amd l~essure of the support on the floor ar~ roof. 824106 P R C ~ U C T M T Y PROBLEM IN DRIVAGES IN BURST-PRONE SEAMS (IN RUSSIAN) sushko, I L Shskhtnoe Stroit, NS, Aug 1981, P13-17 New methods of outburst p r e v e ~ i o n in worked seams, which will not affect l~oductivlty too much, have been suggested. The basic idea of these methods is to l~oduce a relief cavity in the rock surrourding the seam using boas heading machines. Face slots are also cut. 824107 INCREASED USE OF MECHANISED HEADING IN OUTBURSTPRONE SEAMS (IN RUSSIAN) Bolshlnskii, M I Shakhtnoe S~Oit, N7, July 1981, P5-7 The latest trend in outburst prevention is to produce wall cavities so that the roadhead is destressed by prior extraction of rock abOve and below the seam. A specislly tooled machine has been developed specifically for this purpose. It is s~gested that the method can be adapted so that a conventional heading machine could be used. This ~dapted method has been tried out with good advance rates obtained. 824108 ACCESSING OUIrBURST-PRONE SEAMS AT DONBASS DEEP LEVELs (IN RUSSIAN) Khorur~hii~ Y T; Fridman, I S Shakhtnoe Stroit~ N5, May 1981, P27-28 Describes measures used in the D o , ass mines, Russia, to prevent outbursts. One populsr method involves flushing out a cavity in the seam, gas is emitted during this operation and this tends to stabilise the coal. 824109 ROOF ROCK BURST HAZARD IN THE CONTEXT OF A CLOSER K N G W L m ~ E OF NATURAL AND M n n N G C O N D ~ I O N S (IN POLISH) Bilinski, A Gornlctwo, VS, NI, 1981, P69-92 The risk of a roof rock burst is proportiorml to the maximum magnltUde of rock mass tremor that can occur during mining of a given lot@wall panel. A method of estimating the risk of rock burst is presentad.