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Workstation software for numerical modelling of coal mine layouts
109A equipment. Application to dragline selection is illustrated. Fuzzy logic techniques are used to handle certain information used in decision making.
932292 Application of workstation software to numerical modelling of room-and-pillar coal mining Duncan Fama, M E; Follington, I L T r a n s lnst Min Metall (Sect A Min Ind) V101, May-Aug 1992, PA89-A94 Room and pillar mining is widely applied in Australia, typically in areas of structural or lithological complexity. Roof control problems are common in first working and pillar extraction. A suite of programs to assist design and planning is described. Geomechanical input is from CSIRO's ROME (Rock Mechanics) database. The menu-driven program F E M I N D organises input to the numerical design program. Mine layout is input from one component of F E M I N D or a layout program such as MINDRAFT. A plane strain finite element code FESOFT (or others) is used to analyse cross sections in detail. An example illustrates the package used to determine magnitude and variation of vertical stresses in fenders during pillar extraction.
932293 Selection and design of blasting techniques for selective open pit gold mining using knowledge based systems technology Jiang, J; Little, T N Proc 3rd International Symposium on Rock Fragmentation by Blasting, Brisbane, 26-31 August 1990 P391-397. Publ Parkville: AuslMM, 1990 In open pit mines with blocks of different grades, it is desirable to minimise ore dilution when blasting. Geological (geometric, grade distribution, geomechanical), explosive performance, and required output aspects must all be taken into account. These factors are not always well defined, but a large amount of knowledge is available in the form of precedent experience, rules of thumb, engineering judgement, and empirical rules. KBS techniques are well adapted to handling such information. The approach being adopted to develop a KBS for analysis and interpretation of blasting for selective open pit mining is illustrated.
932294 Workstation software for numerical modelling of coal mine layouts Duncan-Fama, M E Proc 7tll ISRM International Congress on Rock Mechanics, Aachen, 16-20 September 1991 V1, P717-720. Publ Rotterdam: A A Balkema, 1991 A suite of computer programs, utilising the power of workstation hardware,to assist in coal mine design is presented. Goomechanical data from laboratory tests are available in the database ROME (ROck MEchanics). Borehole data for numerical modelling are handled by CBLOG (Customised Borehole LOg Generator). Mine layout can be drawn with the drafting system M I N D R A F T and analysed using the 3D displacement discontinuity program MINLAY. Cross sections can be analysed in detail for roadway or pillar stability using the 2D plane strain finite element program FESOFT. Alternative modelling programs can, of course, be used. An example is illustrated.
932295 EXPLORE - an expert system for subsurface exploration Goh, A T C Proc 6tb Australia-New Zealand Conference o n Geomeelumies, Christchurch, 3-7 February 1992 P436-441. Publ New Zealand: New Zealand Geomechanics Society, 1992 Because many geomechanics solutions are based on judgement and empirical rules, there exists the potential to develop expert systems to assist the engineer. Expert system architecture is described and a methodology for assembling a geotechnical expert system for subsurface exploration presented. Selection of the inference engine, knowledge acquisition, building the knowledge base, and validation are discussed. The system developed, EXPLORE, is limited to planning of building sites and considers the structure, subsoil, foundations, and site investigation.
932296 Rock engineering risk assessment through critical mecl~ani~ln and parameter evaluation Hudson, J A; Sheng, J; Arnold, P N Proc 6tb Australia-New Zealand Conference o n Geomechunics, Christchurch, 3-7 February 1992 P442-447. Publ New Zealand: New Zealand Geomechanics Society, 1992 A new approach to identify the important parameters and mechanisms for any rock engineering project is presented. It is based on the use of an interaction matrix with major geotechnical features along the leading diagonal and their interactions in the off-diagonal boxes. The method has been given the acronym REMIT/RESPONSE. It is demonstrated applied (retrospectively) to the Fei-Tsui dam in Taiwan, on massive Oligncene sandstone and siltstone foundations. The discontinuities in the rock mass were identified as a critical parameter and a massive treatment program specified.
Rock Breakage and Excavation Rock fracture under dynamic stresses 932297 Improved modeling of the dynamic fracturing of rock with
propellants Schatz, J F Proe 33rd US Symposium on Rock Mechanics, Santa Fe, 3-5 June 1992 P305-312. Publ Rotterdam: A A Balkema, 1992 Rapid burning of a solid propellant in a borehole creates high gas pressures which can be used to create multiple fractures radiating from the borehole in many angular directions normally opposed by the in situ stress field. An improved mathematical model PULSFRAC, a combination of analytical, finite difference, and iterative methods, to simulate the fracturing is presented. Results are illustrated for air filled and fluid filled boreholes.
© 1993 Pergamon Press Ltd. Reproduction not permitted
932292 Application of workstation software to numerical modelling of room-and-pillar coal mining Duncan Fama, M E; Follington, I L T r a n s lnst Min Metall (Sect A Min Ind) V101, May-Aug 1992, PA89-A94 Room and pillar mining is widely applied in Australia, typically in areas of structural or lithological complexity. Roof control problems are common in first working and pillar extraction. A suite of programs to assist design and planning is described. Geomechanical input is from CSIRO's ROME (Rock Mechanics) database. The menu-driven program F E M I N D organises input to the numerical design program. Mine layout is input from one component of F E M I N D or a layout program such as MINDRAFT. A plane strain finite element code FESOFT (or others) is used to analyse cross sections in detail. An example illustrates the package used to determine magnitude and variation of vertical stresses in fenders during pillar extraction.
932293 Selection and design of blasting techniques for selective open pit gold mining using knowledge based systems technology Jiang, J; Little, T N Proc 3rd International Symposium on Rock Fragmentation by Blasting, Brisbane, 26-31 August 1990 P391-397. Publ Parkville: AuslMM, 1990 In open pit mines with blocks of different grades, it is desirable to minimise ore dilution when blasting. Geological (geometric, grade distribution, geomechanical), explosive performance, and required output aspects must all be taken into account. These factors are not always well defined, but a large amount of knowledge is available in the form of precedent experience, rules of thumb, engineering judgement, and empirical rules. KBS techniques are well adapted to handling such information. The approach being adopted to develop a KBS for analysis and interpretation of blasting for selective open pit mining is illustrated.
932294 Workstation software for numerical modelling of coal mine layouts Duncan-Fama, M E Proc 7tll ISRM International Congress on Rock Mechanics, Aachen, 16-20 September 1991 V1, P717-720. Publ Rotterdam: A A Balkema, 1991 A suite of computer programs, utilising the power of workstation hardware,to assist in coal mine design is presented. Goomechanical data from laboratory tests are available in the database ROME (ROck MEchanics). Borehole data for numerical modelling are handled by CBLOG (Customised Borehole LOg Generator). Mine layout can be drawn with the drafting system M I N D R A F T and analysed using the 3D displacement discontinuity program MINLAY. Cross sections can be analysed in detail for roadway or pillar stability using the 2D plane strain finite element program FESOFT. Alternative modelling programs can, of course, be used. An example is illustrated.
932295 EXPLORE - an expert system for subsurface exploration Goh, A T C Proc 6tb Australia-New Zealand Conference o n Geomeelumies, Christchurch, 3-7 February 1992 P436-441. Publ New Zealand: New Zealand Geomechanics Society, 1992 Because many geomechanics solutions are based on judgement and empirical rules, there exists the potential to develop expert systems to assist the engineer. Expert system architecture is described and a methodology for assembling a geotechnical expert system for subsurface exploration presented. Selection of the inference engine, knowledge acquisition, building the knowledge base, and validation are discussed. The system developed, EXPLORE, is limited to planning of building sites and considers the structure, subsoil, foundations, and site investigation.
932296 Rock engineering risk assessment through critical mecl~ani~ln and parameter evaluation Hudson, J A; Sheng, J; Arnold, P N Proc 6tb Australia-New Zealand Conference o n Geomechunics, Christchurch, 3-7 February 1992 P442-447. Publ New Zealand: New Zealand Geomechanics Society, 1992 A new approach to identify the important parameters and mechanisms for any rock engineering project is presented. It is based on the use of an interaction matrix with major geotechnical features along the leading diagonal and their interactions in the off-diagonal boxes. The method has been given the acronym REMIT/RESPONSE. It is demonstrated applied (retrospectively) to the Fei-Tsui dam in Taiwan, on massive Oligncene sandstone and siltstone foundations. The discontinuities in the rock mass were identified as a critical parameter and a massive treatment program specified.
Rock Breakage and Excavation Rock fracture under dynamic stresses 932297 Improved modeling of the dynamic fracturing of rock with
propellants Schatz, J F Proe 33rd US Symposium on Rock Mechanics, Santa Fe, 3-5 June 1992 P305-312. Publ Rotterdam: A A Balkema, 1992 Rapid burning of a solid propellant in a borehole creates high gas pressures which can be used to create multiple fractures radiating from the borehole in many angular directions normally opposed by the in situ stress field. An improved mathematical model PULSFRAC, a combination of analytical, finite difference, and iterative methods, to simulate the fracturing is presented. Results are illustrated for air filled and fluid filled boreholes.
© 1993 Pergamon Press Ltd. Reproduction not permitted