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Experience from the planning, construction and supporting of a road tunnel subjected to heavy rockbursting
141A 844167 Behaviour of rock around the Okuyoshino u house Kondo, N; Yamashita, M
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power,
Proc 5tk Congress of the latermUional Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD217-D220. Publ Rotterdam: A. A. Balkema, 1983 Prior to the construction of the 180m deep machine hall for the Okuyoshino pumped storage power plant, Japan, the behaviour of the bedrock around the cavity was estimated using finite element analysis. During the excavation, deformation, creep and shear tests were carried out in a test adit in relatively hard shale. The values coincided, with the exception of some poor limited points in the fractured zone where the measured values exceeded the calculated. In-situ stresses and stress around underground openings 844168 Stress analysis of multilayered plates around circular holes Delale, F
lat J Engng Sci V22, NI, 1984, P57-75 A technique to study the three-dimensional stress state around a circular hole in laminated plates is developed. The plate is assumed to be infinite and consists of two bonded dissimilar homogeneous layers; the hole is subjected to axisymmetric external loads. 844169 Diffraction of a stress wave by a cylindrical cavity in an imhite elastic strip Itou, S
lat J Engng Sci V22, N4, 1984, P475-490 The impact response of a cylindrical circular hole in an infinite elastic strip during the passage of a plane shock stress wave is considered, 844170 On singularities due to a concentrated pressure loading of a cylindrical cavity Parnes, R
lnt l Solids Struct [/20, N3, 1984, P267-276 The problem of an elastic medium containing a cylindrical bore on whose surface a concentrated pressure is applied in the form of a circular line load is considered. The results are applicable to the determination of stress in the context of hydraulic fracture problems. 844171 Experience from the planning, construction and supporting of a road tunnel subjected to heavy rocklmrsting Broch, E; Sorheim, S
Rock Meek Rock Engng V17, NI, Jan-March 1984, P15-35 The 5360m Heggura road tunnel, Norway, was driven through Precambrian gneiss. A 3kin section of the tunnel was subject to rock bursts caused by high and anisotropic stresses. During construction it was necessary to install 15,000 rock bolts. Steel fibre reinforced concrete was successfully used for the first time to help stabilise the spalling rock. Detailed mapping of the tunnel was carried out to study the relationship between rock burst activity and the stress situation and rock strength. A rock burst classification system was used to describe the rock burst activity present. Stresses in the rock were calculated using finite element models and measured with 'doorstopper' cells and the CSIR gauge. Predicted and measured results were compared.
844172 N~Wocedure for rock pressure problems in level seams Sheorey, P R; Das, M N; Singh, B In: Strata Mechatdcs (paper to the Symposixm on Strata Mechanics, Newcastle upon Tyne, 5-7 April 1982) P254-259. Publ Amsterdam: Elsevier, 1982
A numerical method is presented for the estimation of rock pressure over workings in level seams. The method uses the finite difference equations describing the deflection of a plate supported elastically. The procedure is proposed as a simpler alternative to other existing numerical methods of a similar nature. A case study of shaft pillar stability and another of pillars in an irregular array are given as examples. 844173 Collapse of room and pillar workings in a shaley gypsum mine due to dynamic loading Mottahed, P; Szeki, A In: Strata Mechanics (paper to the Symposium on Strata Mechanics, Newcastle upon Tyne, 5-7 April 1982) P260-263. Publ Amsterdam: Elsevier, 1982
Two pillar collapses on separate occasions had occurred at the Stamphill Gypsum Mine, Cumbria, UK, in 1973. Rock mechanical investigations have confirmed the hypothesis that the cause of failure was the uncontrolled energy release by the strong strata in the higher roof. 844174 In situ stress measurements and their application to engineering design in the Jinchnan Mine Chunting Liao; Zhaoxian Shi
Proc 5tk Congress of the imerMtioMi Society for Rock Meclumles, Melbourne, 10-15 April 1983 V2, PD87-D89. Publ Rotterdam: A. A. Balkema, 1983 The results of rock stress measurements and characteristics of ground stresses are given for the Jinchuan Mine, China. During the construction and operation of the mine, the drifts were strongly deformed and severely damaged, the greatest damage coinciding with the most severe engineering geological conditions. 844175 Displacement regularity in deep openings near an orebody Yun-Mei Lin
Proc St& Congress of the latermuiomff Society for Rock Meclumlcs, Melbourne, 10-15 April 1983 V2. PD IO9-DI I 2. Publ Rotterdam: A. A. Balkema, 1983 Observations were made on the regularity with which rock pressure occurred in openings near orebodies. Deformation measurements were also carried out at a depth of 1000m. Based upon these field observations together with modelling and analytical studies, it is shown that the regularity of displacements and failure mechanisms which occur typically near orebody openings can be explained by using the stability theory of plates. 844176 Photomeehanical practice of studying conditions of solid rock near undergro~d workings driven at great depth Filatov, N A, Beliakov, V D, Dokukin, A V; Trumbachev, V F; Slavin, O K
Pro¢ 5tk C o q r e u of the Imermatiomd Society for Rock ' Mechamcs, M ¢ ~ , 10-15 April 1983 V2, PD121-D128. Publ Rotterdam: A. A. Balkema, 1983 A number of parameters required for the stability of underground workings and the interaction of supports with solid mass at various static and dynamic effects are substantiated on the basis of the photo-mechanical analysis of models simulating
~
power,
Proc 5tk Congress of the latermUional Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD217-D220. Publ Rotterdam: A. A. Balkema, 1983 Prior to the construction of the 180m deep machine hall for the Okuyoshino pumped storage power plant, Japan, the behaviour of the bedrock around the cavity was estimated using finite element analysis. During the excavation, deformation, creep and shear tests were carried out in a test adit in relatively hard shale. The values coincided, with the exception of some poor limited points in the fractured zone where the measured values exceeded the calculated. In-situ stresses and stress around underground openings 844168 Stress analysis of multilayered plates around circular holes Delale, F
lat J Engng Sci V22, NI, 1984, P57-75 A technique to study the three-dimensional stress state around a circular hole in laminated plates is developed. The plate is assumed to be infinite and consists of two bonded dissimilar homogeneous layers; the hole is subjected to axisymmetric external loads. 844169 Diffraction of a stress wave by a cylindrical cavity in an imhite elastic strip Itou, S
lat J Engng Sci V22, N4, 1984, P475-490 The impact response of a cylindrical circular hole in an infinite elastic strip during the passage of a plane shock stress wave is considered, 844170 On singularities due to a concentrated pressure loading of a cylindrical cavity Parnes, R
lnt l Solids Struct [/20, N3, 1984, P267-276 The problem of an elastic medium containing a cylindrical bore on whose surface a concentrated pressure is applied in the form of a circular line load is considered. The results are applicable to the determination of stress in the context of hydraulic fracture problems. 844171 Experience from the planning, construction and supporting of a road tunnel subjected to heavy rocklmrsting Broch, E; Sorheim, S
Rock Meek Rock Engng V17, NI, Jan-March 1984, P15-35 The 5360m Heggura road tunnel, Norway, was driven through Precambrian gneiss. A 3kin section of the tunnel was subject to rock bursts caused by high and anisotropic stresses. During construction it was necessary to install 15,000 rock bolts. Steel fibre reinforced concrete was successfully used for the first time to help stabilise the spalling rock. Detailed mapping of the tunnel was carried out to study the relationship between rock burst activity and the stress situation and rock strength. A rock burst classification system was used to describe the rock burst activity present. Stresses in the rock were calculated using finite element models and measured with 'doorstopper' cells and the CSIR gauge. Predicted and measured results were compared.
844172 N~Wocedure for rock pressure problems in level seams Sheorey, P R; Das, M N; Singh, B In: Strata Mechatdcs (paper to the Symposixm on Strata Mechanics, Newcastle upon Tyne, 5-7 April 1982) P254-259. Publ Amsterdam: Elsevier, 1982
A numerical method is presented for the estimation of rock pressure over workings in level seams. The method uses the finite difference equations describing the deflection of a plate supported elastically. The procedure is proposed as a simpler alternative to other existing numerical methods of a similar nature. A case study of shaft pillar stability and another of pillars in an irregular array are given as examples. 844173 Collapse of room and pillar workings in a shaley gypsum mine due to dynamic loading Mottahed, P; Szeki, A In: Strata Mechanics (paper to the Symposium on Strata Mechanics, Newcastle upon Tyne, 5-7 April 1982) P260-263. Publ Amsterdam: Elsevier, 1982
Two pillar collapses on separate occasions had occurred at the Stamphill Gypsum Mine, Cumbria, UK, in 1973. Rock mechanical investigations have confirmed the hypothesis that the cause of failure was the uncontrolled energy release by the strong strata in the higher roof. 844174 In situ stress measurements and their application to engineering design in the Jinchnan Mine Chunting Liao; Zhaoxian Shi
Proc 5tk Congress of the imerMtioMi Society for Rock Meclumles, Melbourne, 10-15 April 1983 V2, PD87-D89. Publ Rotterdam: A. A. Balkema, 1983 The results of rock stress measurements and characteristics of ground stresses are given for the Jinchuan Mine, China. During the construction and operation of the mine, the drifts were strongly deformed and severely damaged, the greatest damage coinciding with the most severe engineering geological conditions. 844175 Displacement regularity in deep openings near an orebody Yun-Mei Lin
Proc St& Congress of the latermuiomff Society for Rock Meclumlcs, Melbourne, 10-15 April 1983 V2. PD IO9-DI I 2. Publ Rotterdam: A. A. Balkema, 1983 Observations were made on the regularity with which rock pressure occurred in openings near orebodies. Deformation measurements were also carried out at a depth of 1000m. Based upon these field observations together with modelling and analytical studies, it is shown that the regularity of displacements and failure mechanisms which occur typically near orebody openings can be explained by using the stability theory of plates. 844176 Photomeehanical practice of studying conditions of solid rock near undergro~d workings driven at great depth Filatov, N A, Beliakov, V D, Dokukin, A V; Trumbachev, V F; Slavin, O K
Pro¢ 5tk C o q r e u of the Imermatiomd Society for Rock ' Mechamcs, M ¢ ~ , 10-15 April 1983 V2, PD121-D128. Publ Rotterdam: A. A. Balkema, 1983 A number of parameters required for the stability of underground workings and the interaction of supports with solid mass at various static and dynamic effects are substantiated on the basis of the photo-mechanical analysis of models simulating