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Monitoring for the evaluation of the stability of underground openings
12A
backfilling a~i tu~ier static live load. Values of c i r c ~ e r e n t l a l bendimg moment a~i thrust at 16 locations spaced aroumd the structure's circ~nference at mid-sPan are repcrtc,i for each 2ft of backfill frc~ the spring.llne to 2ft over the crown. Despite bedding moments, 70 percent of the fully plastic value, anl stresses which exceed the nnm~nal yield point of the alumira~, it is coneluded that the structural behaviour is satlsfactc~y. Discrepancies between measured values add design predictions are discussed.
83~o~
PIPELINE LATERAL ~TABILITY IN SOFT CLAY Wantlamd, G M; O'Neill, M W; KalaJlan, E H J Pet Technol, V3~, NI, Jan 1982, P217-220 Studies the effects of (i) pipe weight, (2) pipe diameter, (3) embedment depth, (~) lomling rate add (5) soll type on the resistance developed during lateral displacements of pipes in soft clay, using field argl labaratc~y experiments. A relationship between the depth/dlameter ratio and the maximum resistance is developed.
831095 GEO~,m'±'RrCALSTUDY OF U ~ D m ~ U m D SPACE (IN RUSSIAN) Starltsyn, A B Shakhtnoe Stroit, NI2, Dec 1981, P15-17 Examines the geometrical aspects of umdergroumd surveys and how these affect both undergroumd and surface construction wc~k. This includes the study of groumd movement add f a c t , s influenclmg it. 831096 GEOTECHNICS FOR CONSTRUCTION OF C H A ~ TO HOUSE UND~GROU~,~ C R U S H ~ IN CODELCO-CHILE'S EL TENIENFE MINE Albornoz, H; Erstulovic, G In: Tummelling 82, P r o c e e d ~ s of the ~rd International Symposit~n, Brighton, 7-11 June 1982, ~9-55. Publ London: I}~, 1982 Geotechnical studies umd~taken fo~ the selection and subsequent construction of an tmdergrour~ chamber to house a crusher system at CodelcoChile's E1 Teniente umderground mine are described. During excavation in-situ stress measurements and rock classification (using Rock Quality Designation indices) were used to determine stability conditions. Based on this, the rock support methods chosen included bolting, wire mesh and ahotcrete. APl~opriate instrumentation was inst ~a!led to monitor post construction b~_haviour: extensometers and vibrating wire load cells. Additional studies included finite element analyses for stability analysis. 831097 GEOTEb~NICAL AND TUNNELLING ASPECTS OF RADIOACTIVE WASTE DISPOSAL Hudson, J A; Boden, J B In: Tunnelling 82, Proceedings of the 3rd Interr~tior~l Symposium, Brighton, 7-11 June 1962, P271-281. Pu~l London: ~ , 1982 Discusses the disposal s~stem and the variable nature of rock and soll masses. Each geotechnical parameter is then introduced: the in-situ stress state, the mechanical properties, the thermal properties, %he hydrogeologlcal characteristics and the sarptlon ;roperties. The necessity fc~ in situ experimental data far estimation of ground p r o p e r t i e s s ~ i n~xielllng ve~Iflcation is emphaslsed. Turmelllmg aspects of waste repositc~ies in hard rock and cohesive soils (claMs)
are then discussed. An assessment cf stability ratio values and suggestions for construction techniques in possible repository camdidate clay fore,nations are also presented. 46 refs. 831098 MONITORI~ FOR THE EVALUATION OF THE STABILITY OF b~E~GROUND OPENTN~S Kaiser, P K Proc 1st Cor~erence on Ground Control in Mining, Margantowu, 27-29 July 1981, P90-97. Publ Mc~gantown: West Virginia University, 1981 Reviews the use of field instrumentation, particularly defo~.~tion monitaring, far the evaluation of the behavlour and stability of u n i ~ grour~ openings. Results from labcratory tests on small tunnels are compared with structural amalyses and used to illustrate ground bahaviour.
Mines See also: 831025, 831080, 831090, 831137, 831146, 831150, 831180, 831211, 83121~, 831217, 831220, 831243, 831244, 831257 831099 MODEL S ~ I E S ON CEMENTED TAILINGS USED IN MINE BACEFILL ~tchell, R J; Olsen, R S; Smith, J D Can Geotech J, V19, N1, Feb 1982, P14-28 Physical model tests ~n cemented classified railings amd sand backf.~is have been carried out to determine the strer~th requirements for stability when vertical fill faces are exposed. The results of this laboratory scale model testing s u p ~ a 3-dimension~l ~ y t i c a l solution developed in the paper, whereby the cement s t r e r ~ requirement can be reduced when rock walls are sufficiently close together to help sulmpart the backfill by shearing stresses at the wall-backf~--ll contact. 8311oo OPINIONS ON THE SUPPORT OF SOFT ROCK - Ek~I~IENCE FROM SHA2r AND ROADWAY SUPPORT AT BEIZA0 COLLIERY (IN CHINESE) Wang Yor~hu; Yi Gongyou Coal Sei Technol, NIl, Nov 1961, P39-~3 The characteristics of the rock present at Beizao Colliery, Chips are noted: liability to slakiDg upon weathering, large deformation and expansion, and proneness to collapse of the roof. A n optimal shape far the roadways, suplxn~ materials and type of suppart are described.
831101 INFLUENCE OF PRTSICAL-CH~MICAL CHARAuI'~ISTICS OF ROCKS ON HORIZON MINTNG AND SELECTION OF SUPPORT SYS~I~S IN THE CONDITIONS IN ~ VALEA
mnmuI COALFIELD (IN Ra~IAN) Letu, N; semen, C Mine, Petrol Si Gaze, V32, NI0, 1981, P~63-473 831102 PREDICTING ROCK ~HAVIOUR IN s±'msP SEAM FACES (IN RUSSIAN) Frumkln, R A; Podtikalov, A S Ugol Ukrair~, NS, May 1981, PI~-I6 Presents a method of l~edictir~ the mechanical properties af reck surrour~img steep coal seams. Weighti~gs are assigned to the following factars: thickxmss ~ type c~ rock in the roof, seam t h . t e ~ s s , face adva:~e rate, depth af w ~ k i r ~ seam gradient, coal rar~k, coal properties, arder
backfilling a~i tu~ier static live load. Values of c i r c ~ e r e n t l a l bendimg moment a~i thrust at 16 locations spaced aroumd the structure's circ~nference at mid-sPan are repcrtc,i for each 2ft of backfill frc~ the spring.llne to 2ft over the crown. Despite bedding moments, 70 percent of the fully plastic value, anl stresses which exceed the nnm~nal yield point of the alumira~, it is coneluded that the structural behaviour is satlsfactc~y. Discrepancies between measured values add design predictions are discussed.
83~o~
PIPELINE LATERAL ~TABILITY IN SOFT CLAY Wantlamd, G M; O'Neill, M W; KalaJlan, E H J Pet Technol, V3~, NI, Jan 1982, P217-220 Studies the effects of (i) pipe weight, (2) pipe diameter, (3) embedment depth, (~) lomling rate add (5) soll type on the resistance developed during lateral displacements of pipes in soft clay, using field argl labaratc~y experiments. A relationship between the depth/dlameter ratio and the maximum resistance is developed.
831095 GEO~,m'±'RrCALSTUDY OF U ~ D m ~ U m D SPACE (IN RUSSIAN) Starltsyn, A B Shakhtnoe Stroit, NI2, Dec 1981, P15-17 Examines the geometrical aspects of umdergroumd surveys and how these affect both undergroumd and surface construction wc~k. This includes the study of groumd movement add f a c t , s influenclmg it. 831096 GEOTECHNICS FOR CONSTRUCTION OF C H A ~ TO HOUSE UND~GROU~,~ C R U S H ~ IN CODELCO-CHILE'S EL TENIENFE MINE Albornoz, H; Erstulovic, G In: Tummelling 82, P r o c e e d ~ s of the ~rd International Symposit~n, Brighton, 7-11 June 1982, ~9-55. Publ London: I}~, 1982 Geotechnical studies umd~taken fo~ the selection and subsequent construction of an tmdergrour~ chamber to house a crusher system at CodelcoChile's E1 Teniente umderground mine are described. During excavation in-situ stress measurements and rock classification (using Rock Quality Designation indices) were used to determine stability conditions. Based on this, the rock support methods chosen included bolting, wire mesh and ahotcrete. APl~opriate instrumentation was inst ~a!led to monitor post construction b~_haviour: extensometers and vibrating wire load cells. Additional studies included finite element analyses for stability analysis. 831097 GEOTEb~NICAL AND TUNNELLING ASPECTS OF RADIOACTIVE WASTE DISPOSAL Hudson, J A; Boden, J B In: Tunnelling 82, Proceedings of the 3rd Interr~tior~l Symposium, Brighton, 7-11 June 1962, P271-281. Pu~l London: ~ , 1982 Discusses the disposal s~stem and the variable nature of rock and soll masses. Each geotechnical parameter is then introduced: the in-situ stress state, the mechanical properties, the thermal properties, %he hydrogeologlcal characteristics and the sarptlon ;roperties. The necessity fc~ in situ experimental data far estimation of ground p r o p e r t i e s s ~ i n~xielllng ve~Iflcation is emphaslsed. Turmelllmg aspects of waste repositc~ies in hard rock and cohesive soils (claMs)
are then discussed. An assessment cf stability ratio values and suggestions for construction techniques in possible repository camdidate clay fore,nations are also presented. 46 refs. 831098 MONITORI~ FOR THE EVALUATION OF THE STABILITY OF b~E~GROUND OPENTN~S Kaiser, P K Proc 1st Cor~erence on Ground Control in Mining, Margantowu, 27-29 July 1981, P90-97. Publ Mc~gantown: West Virginia University, 1981 Reviews the use of field instrumentation, particularly defo~.~tion monitaring, far the evaluation of the behavlour and stability of u n i ~ grour~ openings. Results from labcratory tests on small tunnels are compared with structural amalyses and used to illustrate ground bahaviour.
Mines See also: 831025, 831080, 831090, 831137, 831146, 831150, 831180, 831211, 83121~, 831217, 831220, 831243, 831244, 831257 831099 MODEL S ~ I E S ON CEMENTED TAILINGS USED IN MINE BACEFILL ~tchell, R J; Olsen, R S; Smith, J D Can Geotech J, V19, N1, Feb 1982, P14-28 Physical model tests ~n cemented classified railings amd sand backf.~is have been carried out to determine the strer~th requirements for stability when vertical fill faces are exposed. The results of this laboratory scale model testing s u p ~ a 3-dimension~l ~ y t i c a l solution developed in the paper, whereby the cement s t r e r ~ requirement can be reduced when rock walls are sufficiently close together to help sulmpart the backfill by shearing stresses at the wall-backf~--ll contact. 8311oo OPINIONS ON THE SUPPORT OF SOFT ROCK - Ek~I~IENCE FROM SHA2r AND ROADWAY SUPPORT AT BEIZA0 COLLIERY (IN CHINESE) Wang Yor~hu; Yi Gongyou Coal Sei Technol, NIl, Nov 1961, P39-~3 The characteristics of the rock present at Beizao Colliery, Chips are noted: liability to slakiDg upon weathering, large deformation and expansion, and proneness to collapse of the roof. A n optimal shape far the roadways, suplxn~ materials and type of suppart are described.
831101 INFLUENCE OF PRTSICAL-CH~MICAL CHARAuI'~ISTICS OF ROCKS ON HORIZON MINTNG AND SELECTION OF SUPPORT SYS~I~S IN THE CONDITIONS IN ~ VALEA
mnmuI COALFIELD (IN Ra~IAN) Letu, N; semen, C Mine, Petrol Si Gaze, V32, NI0, 1981, P~63-473 831102 PREDICTING ROCK ~HAVIOUR IN s±'msP SEAM FACES (IN RUSSIAN) Frumkln, R A; Podtikalov, A S Ugol Ukrair~, NS, May 1981, PI~-I6 Presents a method of l~edictir~ the mechanical properties af reck surrour~img steep coal seams. Weighti~gs are assigned to the following factars: thickxmss ~ type c~ rock in the roof, seam t h . t e ~ s s , face adva:~e rate, depth af w ~ k i r ~ seam gradient, coal rar~k, coal properties, arder