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Estimation of the stability of room and pillar workings and roof behaviour (In French)
137A 844131 Geomechanical investigations for the development of the . . . . . Campiano Mine Crea, G; Lembo-Fazio, A; Ribacchi, R; Pantaleone, G
Proc 5th Congress of the International Society for Rock Meclumics, Melbourne, 10-15 April 1983 V2, PD77-D86. Pub/ Rotterdam: A. A. Balkema, 1983 It is planned to develop the Campiano Mine, Italy, for the exploitation by sublevel stoping of a pyrite and mixed sulphide lode dipping at 45 deg. The laboratory and in situ mechanical characteristics of the rock formations, the support systems and the static behaviour of the excavations are discussed. Geomechanical analyses of various stoping schemes have provided preliminary indications of the stability of the stopes and of the influence of the exploitation on the shafts and other service excavations. 844132 Estimation of the stability of room and pillar workings and roof bchaviour (In French) Chambon, C; Areamone, J; Josien, J P; Piguet, J P
Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD91-D95. Pub/ Rotterdam." A. A. Balkema, 1983 Following the analysis of case studies of collapse in roof and pillar workings, an approach to stability analysis is presented based upon the representation of the whole mine under study by numerical finite element models. 844133 Energy approach to room and pillar exploitations based on post-failure bchaviour of pillars (In French) Weber, P
Proc 5th Congress of the lntermaional Society for Rock Mecham'cs, Melbourne, 10-15 April 1983 1/2, PD97-D100. Publ Rotterdam: A. A. Balkema, 1983 To model the mechanical behaviour of pillars a four-parameter model is proposed. The parameters considered are: Young's modulus, compressive strength, negative yield modulus and residual strength. Calculation of the system's mechanical energy leads to the definition of global stability conditions. When a critical extraction ratio is reached, the result is a global instability of the whole exploitation. This phenomenon probably constitutes one of the likely initiating mechanisms of rock bursts. 844134 Theoretical principles and fundamentals of rock burst prediction and control Petukhov, I M; Linker, A M Proc 5tk Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD l l 3-D120. Publ Rotterdam: A. A. Balkema, 1983
The current state of the rock burst problem in the USSR is discussed and conditions leading to the occurrence of rock bursts are reviewed. The main theories of rock bursts are presented in relation to practical applications and some suggestions for future development of the theory are made. 844135 Slope stability in underground bauxite exploitation Vujec, S; Zeljkovic, D
Proc 5tk Congress of the lmernntiotml Society for Rock Meclumics, Melbourne, 10-15 April 1983 V2, PD I29-D I34. Publ Rotterdam: A. A. Balkema, 1983 To improve the underground bauxite exploitation method at the Jajce Mine, Poljane, Yugoslavia, the stability limit of open spaces was determined by in situ observation of slope stability and stress-strain calculations using the finite element method.
The results led to a modification of the mining method, increasing safety and productivity. 844136 Mathematical modd of n cut and fill mine Oyanguren, P R; Carpenter, P; Alfageme, F J; Canto, J M
Proc 5tk Congress of the lnternatimml Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD135-139. Publ Rotterdam: A. A. Baikema, 1983 The design of cut and fill mines using the post-pillar technique is difficult to achieve theoretically. Modelling of the process of controlled deformation and transfer stress during excavation must incorporate: joints, rock mechanical properties of the rock mass in the plastic state, in situ stresses in the orebody prior to excavation, the process of excavating the ore and the progressive failure of the pillars and the rock mass surrounding the excavation. Such a model (SAGE) is used for the design of the Soteil Mine, Huelva, Spain. 844137 Geotechnical study of the stability of the Santa Clara stope at the El Soidndo Mine in Chile Bolivar, E B; Krstulovic, G L
Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April.1983 V2, PDI41-D150. Publ Rotterdam: A. A. Balkema, 1983 Sub-level stoping at the El Soldado copper mine, Chile, produced a large open cavity 3OOmby 100m by 150m in the Santa Clara sector. Since this cavity had not collapsed or broken through to the surface, it was necessary to determine the stability of the roof and rocks surrounding the cavity. A three part stability analysis was carried out: (1) evaluation of the in situ rock quality, (2) simulation of geological and tectonic conditions of the stope and (3) implementation of an instrumentation programme in the field. 844138 Investigation into the rock mechanics aspects of sublevel open stope mining Pasamehmetoglu, A G; Irfan, T Y; Bolukbasi, N; Bilgin, A; Ozgenoglu, A; Karpuz, C
Proc 5tk Congress of the International Society for Rock Mcc&mics, Melbourne, 10-15 April 1983 V2, PDI51-DI61. Publ Rotterdam: A. A. Balkema, 1983 At the Bursa tungsten mine, Turkey, an evaluation was carried out of the sublevel open stope mining method with respect to stability of stopes, rib pillars and galleries. Major geological patterns and their strength characteristics, together with the physical and mechanical properties of the ore-bearing wall rocks were studied. Using different rock mass classification systems an evaluation of the rock mass was established. A back analysis was carried out and the stability of stopes and pillars considered. 844139 Roof failure quantification and prediction in underground mines of the Burrngorang Valley, NSW Laslett, G M; Rawlings, C D, Beamish, B B
CSIRO Division of Applied Geomechanies report GCM 56, 1983, 55P A study of roof failure and its association with environmental variables was carried out by mapping roof conditions in 11 panels at varying distances from a major escarpment. It was concluded that: (1) failure is more pronounced under valleys, (2) failure tends to increase with increasing distance from the escarpment, (3) failure is more pronounced on the down-thrown side of major faults associated with the monoclinal flexure, and (4) failure increases with increasing extraction ratio.
Proc 5th Congress of the International Society for Rock Meclumics, Melbourne, 10-15 April 1983 V2, PD77-D86. Pub/ Rotterdam: A. A. Balkema, 1983 It is planned to develop the Campiano Mine, Italy, for the exploitation by sublevel stoping of a pyrite and mixed sulphide lode dipping at 45 deg. The laboratory and in situ mechanical characteristics of the rock formations, the support systems and the static behaviour of the excavations are discussed. Geomechanical analyses of various stoping schemes have provided preliminary indications of the stability of the stopes and of the influence of the exploitation on the shafts and other service excavations. 844132 Estimation of the stability of room and pillar workings and roof bchaviour (In French) Chambon, C; Areamone, J; Josien, J P; Piguet, J P
Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD91-D95. Pub/ Rotterdam." A. A. Balkema, 1983 Following the analysis of case studies of collapse in roof and pillar workings, an approach to stability analysis is presented based upon the representation of the whole mine under study by numerical finite element models. 844133 Energy approach to room and pillar exploitations based on post-failure bchaviour of pillars (In French) Weber, P
Proc 5th Congress of the lntermaional Society for Rock Mecham'cs, Melbourne, 10-15 April 1983 1/2, PD97-D100. Publ Rotterdam: A. A. Balkema, 1983 To model the mechanical behaviour of pillars a four-parameter model is proposed. The parameters considered are: Young's modulus, compressive strength, negative yield modulus and residual strength. Calculation of the system's mechanical energy leads to the definition of global stability conditions. When a critical extraction ratio is reached, the result is a global instability of the whole exploitation. This phenomenon probably constitutes one of the likely initiating mechanisms of rock bursts. 844134 Theoretical principles and fundamentals of rock burst prediction and control Petukhov, I M; Linker, A M Proc 5tk Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD l l 3-D120. Publ Rotterdam: A. A. Balkema, 1983
The current state of the rock burst problem in the USSR is discussed and conditions leading to the occurrence of rock bursts are reviewed. The main theories of rock bursts are presented in relation to practical applications and some suggestions for future development of the theory are made. 844135 Slope stability in underground bauxite exploitation Vujec, S; Zeljkovic, D
Proc 5tk Congress of the lmernntiotml Society for Rock Meclumics, Melbourne, 10-15 April 1983 V2, PD I29-D I34. Publ Rotterdam: A. A. Balkema, 1983 To improve the underground bauxite exploitation method at the Jajce Mine, Poljane, Yugoslavia, the stability limit of open spaces was determined by in situ observation of slope stability and stress-strain calculations using the finite element method.
The results led to a modification of the mining method, increasing safety and productivity. 844136 Mathematical modd of n cut and fill mine Oyanguren, P R; Carpenter, P; Alfageme, F J; Canto, J M
Proc 5tk Congress of the lnternatimml Society for Rock Mechanics, Melbourne, 10-15 April 1983 V2, PD135-139. Publ Rotterdam: A. A. Baikema, 1983 The design of cut and fill mines using the post-pillar technique is difficult to achieve theoretically. Modelling of the process of controlled deformation and transfer stress during excavation must incorporate: joints, rock mechanical properties of the rock mass in the plastic state, in situ stresses in the orebody prior to excavation, the process of excavating the ore and the progressive failure of the pillars and the rock mass surrounding the excavation. Such a model (SAGE) is used for the design of the Soteil Mine, Huelva, Spain. 844137 Geotechnical study of the stability of the Santa Clara stope at the El Soidndo Mine in Chile Bolivar, E B; Krstulovic, G L
Proc 5th Congress of the International Society for Rock Mechanics, Melbourne, 10-15 April.1983 V2, PDI41-D150. Publ Rotterdam: A. A. Balkema, 1983 Sub-level stoping at the El Soldado copper mine, Chile, produced a large open cavity 3OOmby 100m by 150m in the Santa Clara sector. Since this cavity had not collapsed or broken through to the surface, it was necessary to determine the stability of the roof and rocks surrounding the cavity. A three part stability analysis was carried out: (1) evaluation of the in situ rock quality, (2) simulation of geological and tectonic conditions of the stope and (3) implementation of an instrumentation programme in the field. 844138 Investigation into the rock mechanics aspects of sublevel open stope mining Pasamehmetoglu, A G; Irfan, T Y; Bolukbasi, N; Bilgin, A; Ozgenoglu, A; Karpuz, C
Proc 5tk Congress of the International Society for Rock Mcc&mics, Melbourne, 10-15 April 1983 V2, PDI51-DI61. Publ Rotterdam: A. A. Balkema, 1983 At the Bursa tungsten mine, Turkey, an evaluation was carried out of the sublevel open stope mining method with respect to stability of stopes, rib pillars and galleries. Major geological patterns and their strength characteristics, together with the physical and mechanical properties of the ore-bearing wall rocks were studied. Using different rock mass classification systems an evaluation of the rock mass was established. A back analysis was carried out and the stability of stopes and pillars considered. 844139 Roof failure quantification and prediction in underground mines of the Burrngorang Valley, NSW Laslett, G M; Rawlings, C D, Beamish, B B
CSIRO Division of Applied Geomechanies report GCM 56, 1983, 55P A study of roof failure and its association with environmental variables was carried out by mapping roof conditions in 11 panels at varying distances from a major escarpment. It was concluded that: (1) failure is more pronounced under valleys, (2) failure tends to increase with increasing distance from the escarpment, (3) failure is more pronounced on the down-thrown side of major faults associated with the monoclinal flexure, and (4) failure increases with increasing extraction ratio.