- Email: [email protected]
Computer support in scheduling the Iscor Grootegeluk coal mine - a case study
891366 Thncdimensionnl
stress-strain
analysis of tunnel face
Dolezalova, M Proe ECONMIC 86, Stuttgart, 16-18 September 1986 V2. 13P. Pub1 Stuttgart: University of Stuttgart. 1986 Face instability occurred during the driving of the Prague Metro tunnels due to faults and seamy and blocky structures in the clay schist. Partial excavation techniques improved stability in many cases, but large surface settlements resulted. Three dimensional finite element analysis of fullface and partial excavation was carried out using the code NEPP-3. Results indicate that partial extraction, where ground is repeatedly disturbed and lining is delayed, results in loosening of the face and expansion of the failure zone around the tunnel, especially in weak rock. Creep deformation leads to settlement. Fullface excavation and support of the face by long anchors is suggested.
Power plants 891367 Some experiences of rapid excnvation in Lubuge hydroelectric power tunnel,China Guo Zongyan; Wan
Shengpei Proc TunneUng ‘88, London, 18-21 April 1988 P143-148. Pub1 London: IMM. 1988
Construction of a pressure tunnel through dolomite and limestone strata is described. Tunnelling was by drill and blast, initially from two face&finally from one only. Average advance rate of 23 I m per month from each face was achieved. Drilling patterns, blast design, and construction equipment and procedures are considered.
Mines See also: 891084. 891198, 891250, 891265, 891266. 891267, 891368 Performance
891370 Expert systems for colliery problems Bodkin, K E Colliery Guard V236. N7. July 1988. P216-219 The expert system concept is discussed in general terms. A development strategy for systems applicable to the coal industry and implementable on low cost PCs is presented. Applications to date, including support design and coal gassiness prediction, are described. Future developments and potential benefits are surmised. 891371 Economic and technoiof@cal PsBcsrPmeatof shaft sinking by conventional hand held drills contrasted with rig mounted mechanised drilling methods
Douglas, A Min Engr V148. N323. Aug 1988, PS9-69 A comparison of 2 shafts of slightly different diameter, one sunk using a seven boom drill rig, the other with hand held rock drills, is presented. The shafts, and the sinking cycle from blowover to blast are described. The main points are tabulated. and data adjusted for shaft differences to enable realistic comparison. A full costing exercise is presented, and the mechanised technique shown to be the viable option. 891372 TBM speeds exploration drivnge at Kiena gold mine Vanin, D Min Mag Aug 1988. P88-91 Underground conditions at the mine in Quebec range from hard competent andesites and basahs to incompetent fractured peridotite. An exploratory drift was required quickly, and as most of the drift was thought to be in the weaker rock, a TBM drive by an outside contractor was decided upon. Rock hardness in some areas was greater than expected, and the TBM was withdrawn after cutterhead failure. fn other areas rapid drivage was achieved. Valuable information on TBM drivage at the mine was acquired, but it is thought unlikely that it will replace drill and blast except when long single drivage is required in a hurry.
of longwail gateroads with soft floors
Afrouz, A; Hassani. F P; Scoble, M J Can Geotech J V25. N2. May 1988, P279-291 A modified mid-ordinate system was used to provide data on roof lowering or closure, side closure, penetration or floor yield characteristics and floor lift for gateroads with soft floors. In addition, scanning electron microscopy was used to determine fracture and rupture characteristics of brittle and ductile rocks. The results are discussed, an empirical formula for gateroad closure is proposed, and a design chart for coal gateroads relating ground conditions to percentage roadway closure is presented. 891369 Summary of twenty-four surface crown pillar case studies Betoumay, M C; Nantel, S; Lessard, D CIM Bulletin V81. N915. July 1988, P73-77 Data from 24 mines in Canada, representative of geological conditions and mining methods in hard rock mines, have been collected and analysed to provide information and tools necessary for safe and economical pillar design. The data are summarised in 3 main categories, surface crown pillar characteristics, gathering of basic data and pillar creation. The data from these case studies indicate that the deposits dip steeply, are generally either single or multiple veins and are usually capped by considerable overburden. Alteration and intersection by discontinuities is common.
891373 Computer aided lignite mining in the Rhineland Lignite Mining area
Dermietzel, E; Bingel, G; Reusch, P Proc APCOM 87, Johonneshurg, 19-23 October 1987 VI, P203-220. Pub1 Johannesburg:
SAIMM,
1987
Computer aided lignite mining (CALM) is the integration of interactive graphical work stations and expert systems for various technical and administrative applications. For technical purposes, the main facilities are deposit and pit modelling, complex geomechanical computations and mass calculations, data recording from production processes in the pits and refining plants, and detailed information and planning systems for water management and mining equipment. 891374 Computer support in scheduling the Iscor Grootegeiuk mine - a case study
coal
Kotze, A P L; Brink, V S Proc APCOM 87, Johunneshurg, D-23 October 1987 VI, P221-229. Pub1 Johannesburg:
SAIMM,
1987
A microcomputer based modelling and scheduhng system has been developed for the Grootegeluk mine, S. Africa. A geo!ogical database is used to model mine benches and coal product values. These models are then used along with operating conditions for pit layout design.
$$ 1989 Pergamon Press plc. Reproduction
not permitted
stress-strain
analysis of tunnel face
Dolezalova, M Proe ECONMIC 86, Stuttgart, 16-18 September 1986 V2. 13P. Pub1 Stuttgart: University of Stuttgart. 1986 Face instability occurred during the driving of the Prague Metro tunnels due to faults and seamy and blocky structures in the clay schist. Partial excavation techniques improved stability in many cases, but large surface settlements resulted. Three dimensional finite element analysis of fullface and partial excavation was carried out using the code NEPP-3. Results indicate that partial extraction, where ground is repeatedly disturbed and lining is delayed, results in loosening of the face and expansion of the failure zone around the tunnel, especially in weak rock. Creep deformation leads to settlement. Fullface excavation and support of the face by long anchors is suggested.
Power plants 891367 Some experiences of rapid excnvation in Lubuge hydroelectric power tunnel,China Guo Zongyan; Wan
Shengpei Proc TunneUng ‘88, London, 18-21 April 1988 P143-148. Pub1 London: IMM. 1988
Construction of a pressure tunnel through dolomite and limestone strata is described. Tunnelling was by drill and blast, initially from two face&finally from one only. Average advance rate of 23 I m per month from each face was achieved. Drilling patterns, blast design, and construction equipment and procedures are considered.
Mines See also: 891084. 891198, 891250, 891265, 891266. 891267, 891368 Performance
891370 Expert systems for colliery problems Bodkin, K E Colliery Guard V236. N7. July 1988. P216-219 The expert system concept is discussed in general terms. A development strategy for systems applicable to the coal industry and implementable on low cost PCs is presented. Applications to date, including support design and coal gassiness prediction, are described. Future developments and potential benefits are surmised. 891371 Economic and technoiof@cal PsBcsrPmeatof shaft sinking by conventional hand held drills contrasted with rig mounted mechanised drilling methods
Douglas, A Min Engr V148. N323. Aug 1988, PS9-69 A comparison of 2 shafts of slightly different diameter, one sunk using a seven boom drill rig, the other with hand held rock drills, is presented. The shafts, and the sinking cycle from blowover to blast are described. The main points are tabulated. and data adjusted for shaft differences to enable realistic comparison. A full costing exercise is presented, and the mechanised technique shown to be the viable option. 891372 TBM speeds exploration drivnge at Kiena gold mine Vanin, D Min Mag Aug 1988. P88-91 Underground conditions at the mine in Quebec range from hard competent andesites and basahs to incompetent fractured peridotite. An exploratory drift was required quickly, and as most of the drift was thought to be in the weaker rock, a TBM drive by an outside contractor was decided upon. Rock hardness in some areas was greater than expected, and the TBM was withdrawn after cutterhead failure. fn other areas rapid drivage was achieved. Valuable information on TBM drivage at the mine was acquired, but it is thought unlikely that it will replace drill and blast except when long single drivage is required in a hurry.
of longwail gateroads with soft floors
Afrouz, A; Hassani. F P; Scoble, M J Can Geotech J V25. N2. May 1988, P279-291 A modified mid-ordinate system was used to provide data on roof lowering or closure, side closure, penetration or floor yield characteristics and floor lift for gateroads with soft floors. In addition, scanning electron microscopy was used to determine fracture and rupture characteristics of brittle and ductile rocks. The results are discussed, an empirical formula for gateroad closure is proposed, and a design chart for coal gateroads relating ground conditions to percentage roadway closure is presented. 891369 Summary of twenty-four surface crown pillar case studies Betoumay, M C; Nantel, S; Lessard, D CIM Bulletin V81. N915. July 1988, P73-77 Data from 24 mines in Canada, representative of geological conditions and mining methods in hard rock mines, have been collected and analysed to provide information and tools necessary for safe and economical pillar design. The data are summarised in 3 main categories, surface crown pillar characteristics, gathering of basic data and pillar creation. The data from these case studies indicate that the deposits dip steeply, are generally either single or multiple veins and are usually capped by considerable overburden. Alteration and intersection by discontinuities is common.
891373 Computer aided lignite mining in the Rhineland Lignite Mining area
Dermietzel, E; Bingel, G; Reusch, P Proc APCOM 87, Johonneshurg, 19-23 October 1987 VI, P203-220. Pub1 Johannesburg:
SAIMM,
1987
Computer aided lignite mining (CALM) is the integration of interactive graphical work stations and expert systems for various technical and administrative applications. For technical purposes, the main facilities are deposit and pit modelling, complex geomechanical computations and mass calculations, data recording from production processes in the pits and refining plants, and detailed information and planning systems for water management and mining equipment. 891374 Computer support in scheduling the Iscor Grootegeiuk mine - a case study
coal
Kotze, A P L; Brink, V S Proc APCOM 87, Johunneshurg, D-23 October 1987 VI, P221-229. Pub1 Johannesburg:
SAIMM,
1987
A microcomputer based modelling and scheduhng system has been developed for the Grootegeluk mine, S. Africa. A geo!ogical database is used to model mine benches and coal product values. These models are then used along with operating conditions for pit layout design.
$$ 1989 Pergamon Press plc. Reproduction
not permitted