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Design and construction of an underground powerhouse in rock subjected to high horizontal stresses
34A 861271 Saas-Fee's Alpine Metro: tunnel construction for a tourist railway Schneller. P G Proc o f the Eurotunnel '83 Conference, Basle, 22-24 dune 1983 P149-155. Publ Marlow: Access CwT/brences Ltd. 1983 Due to tourist demand, it was decided to construct a tunnel for a 1500m long funicular railway from Felskinn (3000m) to the Mittel Allalinhorn (3500m) under the rock and glacier. rather than an aerial cable-way. Description is given of the glacier investigation using rapid hydrothermal drilling techniques: the problems of transporting the tunnelling equipment to the site: how water was supplied through suspended pipelines supported on the glacier; and the construction procedure.
Power plants See also. 861152, 861162, 861209 861272 Design and construction of an underground powerhouse in rock subjected to high horizontal stresses Soria, J L; Wittke, W
Proc 6th National Rock Mechanics Symposium, Aachen, 3-4
and laboratory simulation tests arc cxannncd m ~ c ~ ol ground control problems, such as rock stabilit.~ during drilling, chamber excavation, stope development and the fill behaviour. Results are of use in the design of the mining methods and the management of mining performance
861275 Rock mechanics investigations of the cut and fill mine Nasliden by means of field investigations and FE-models Krauland, N Proc 6th National Rock Mechanics Symposium, Aachen, 3-4 April 1985 P139-147. Publ Essen. German Society for Soil Mechanics and Foundation Engineering, 1985 The rock mechanics of the mining of generally small, steeply dipping ore bodies, using the cut and fill method, at the Nasliden Mine, Sweden, have been studied since 1970. Monitoring systems have recorded stresses, deflections and convergences in the fill, ore bodies, hanging walls and roofs. Information collected has been used to assist development of a finite element model to assist mine planning. Stope stability is simulated using joint elements along the ore contacts. Overall behaviour of the mine is simulated by elastic models.
April 1985 Pl15-129. Publ Essen." German Socieo, for Soil Mechanics and Foundation Engineering, 1985 The cavern for the Estangento pumped storage scheme was excavated in discontinuous granite with a rock mass overburden of 100m. Extensive geological and rock mechanical investigations were undertaken before the start of excavation and were continued throughout the project. Stability analyses during planning and construction were complicated by high in situ stresses and two sets of discontinuities striking parallel to the cavern. Support requirements, shotcrete, bolts and anchors, were determined based on up to the minute site monitoring information. Deformations, convergence and stresses on anchors were monitored throughout construction and interpreted by finite element analysis. The cavern was successfully completed with favourable economy.
Mines See also. 861145. 861161 861273 Rib pillar extraction at Sigma colliery, Republic of South Africa Crous, P C Gluekauf V121, NI3, 11 JuO' 1985, P1026-1029 (german), P313-315 (english) Panel layout, mining cycle, support and operating results for the rib pillar extraction method are described. Very high productivity levels and utilization of 95% of the deposit can be achieved. Limits so far are depth 400m and seam thickness 3.5m. but trials are in progress for greater seam thicknesses. 861274 Investigation in ground pressure with relation to VCR mining method (In Chinese) Sang Yu-fa; Mai Chi-quan Q Changsha lnst Min Res 175, N2, June 1985, PI-6 The VCR mining method significantly improves mine safety as no one need operate directly under the unsupported roof. Results of a field investigation in Fan Kou Lead Zinc mine
861276 Stress control method applied to stabilization of underground coal mine openings Serata, S; C a m F; Martin, E In: Rock Mechanics in Productivity and Protection (Proceedings of the Twenty-Fifth Symposium on Rock Mechanics, Evanston, Illinois, 25-27 dune 1984) P583-590. Publ New York. AIME, 1984 Floor heave in a coal mine near Birmingham, Alabama, USA, was minimised using the stress control method. In this method, yield pillars are used to control the formation of a final protective stress envelope surrounding a group of openings separated only by thin yield pillars. The formation of the protective envelope is controlled by following a specified time sequence in creating the yield pillars. A finite element analysis of the 3-room entry created using the stress control method is presented.
861277 Optimum mining plan for multiple seam mining Su, W H: Hsiung, S M; Peng, S S
In: Rock Mechanics in Productivity and Protection (Proceedings of the Twenty-Fifth Symposium on Rock Mechanics, Evanston, Illinois, 25-27 June 1984) P591-602. Publ New York: AIME, 1984 Interaction effects in multiple seam mining can lead to complete loss of coal properties. Two parallel approaches to mine planning, one with field investigation, the other using finite element analysis, are adopted. The parameters controlling interaction are identified for two cases representing the past and present multiple seam mining practices in West Virginia, USA. It is demonstrated that ground control problems associated with multiple seam mining can generally be identified by finite element analysis and improved mining plans can be proposed accordingly.
Power plants See also. 861152, 861162, 861209 861272 Design and construction of an underground powerhouse in rock subjected to high horizontal stresses Soria, J L; Wittke, W
Proc 6th National Rock Mechanics Symposium, Aachen, 3-4
and laboratory simulation tests arc cxannncd m ~ c ~ ol ground control problems, such as rock stabilit.~ during drilling, chamber excavation, stope development and the fill behaviour. Results are of use in the design of the mining methods and the management of mining performance
861275 Rock mechanics investigations of the cut and fill mine Nasliden by means of field investigations and FE-models Krauland, N Proc 6th National Rock Mechanics Symposium, Aachen, 3-4 April 1985 P139-147. Publ Essen. German Society for Soil Mechanics and Foundation Engineering, 1985 The rock mechanics of the mining of generally small, steeply dipping ore bodies, using the cut and fill method, at the Nasliden Mine, Sweden, have been studied since 1970. Monitoring systems have recorded stresses, deflections and convergences in the fill, ore bodies, hanging walls and roofs. Information collected has been used to assist development of a finite element model to assist mine planning. Stope stability is simulated using joint elements along the ore contacts. Overall behaviour of the mine is simulated by elastic models.
April 1985 Pl15-129. Publ Essen." German Socieo, for Soil Mechanics and Foundation Engineering, 1985 The cavern for the Estangento pumped storage scheme was excavated in discontinuous granite with a rock mass overburden of 100m. Extensive geological and rock mechanical investigations were undertaken before the start of excavation and were continued throughout the project. Stability analyses during planning and construction were complicated by high in situ stresses and two sets of discontinuities striking parallel to the cavern. Support requirements, shotcrete, bolts and anchors, were determined based on up to the minute site monitoring information. Deformations, convergence and stresses on anchors were monitored throughout construction and interpreted by finite element analysis. The cavern was successfully completed with favourable economy.
Mines See also. 861145. 861161 861273 Rib pillar extraction at Sigma colliery, Republic of South Africa Crous, P C Gluekauf V121, NI3, 11 JuO' 1985, P1026-1029 (german), P313-315 (english) Panel layout, mining cycle, support and operating results for the rib pillar extraction method are described. Very high productivity levels and utilization of 95% of the deposit can be achieved. Limits so far are depth 400m and seam thickness 3.5m. but trials are in progress for greater seam thicknesses. 861274 Investigation in ground pressure with relation to VCR mining method (In Chinese) Sang Yu-fa; Mai Chi-quan Q Changsha lnst Min Res 175, N2, June 1985, PI-6 The VCR mining method significantly improves mine safety as no one need operate directly under the unsupported roof. Results of a field investigation in Fan Kou Lead Zinc mine
861276 Stress control method applied to stabilization of underground coal mine openings Serata, S; C a m F; Martin, E In: Rock Mechanics in Productivity and Protection (Proceedings of the Twenty-Fifth Symposium on Rock Mechanics, Evanston, Illinois, 25-27 dune 1984) P583-590. Publ New York. AIME, 1984 Floor heave in a coal mine near Birmingham, Alabama, USA, was minimised using the stress control method. In this method, yield pillars are used to control the formation of a final protective stress envelope surrounding a group of openings separated only by thin yield pillars. The formation of the protective envelope is controlled by following a specified time sequence in creating the yield pillars. A finite element analysis of the 3-room entry created using the stress control method is presented.
861277 Optimum mining plan for multiple seam mining Su, W H: Hsiung, S M; Peng, S S
In: Rock Mechanics in Productivity and Protection (Proceedings of the Twenty-Fifth Symposium on Rock Mechanics, Evanston, Illinois, 25-27 June 1984) P591-602. Publ New York: AIME, 1984 Interaction effects in multiple seam mining can lead to complete loss of coal properties. Two parallel approaches to mine planning, one with field investigation, the other using finite element analysis, are adopted. The parameters controlling interaction are identified for two cases representing the past and present multiple seam mining practices in West Virginia, USA. It is demonstrated that ground control problems associated with multiple seam mining can generally be identified by finite element analysis and improved mining plans can be proposed accordingly.