Integrated automization of longwall mining system

254A 885424 Use of block and wireframe modelling for underground mining Wheeler, A J; Stokes, W P C Min Mag V158, N3, March 1988, P209-213 Two types of computer modelling technique have been developed to aid planning of underground mines. Block models are useful to describe the variations in properties in three dimensions and for kriging, but inefficient for surfaces. Wireframe models are good for surfaces and shapes and CAD applications, but provide poor property descriptions. Integration of the two models provides the best results. 885425 Rock mechanics investigations at Mufulira mine, Zambia Broome, M T; Sandy, M P Trans inst Min Metall (Sect A Min lnd) V97, Jan 1988, PA9-AI8 The use of postfill mining in two areas of Mufulira led to stress problems in downstope areas and downward propagation of hangingwall caving is inhibited. Return to cave mining has not yet improved conditions. Seismicity, stress induced damage and rockburst have increased below the sandfill. All current production areas are supported to expected stress levels. Stress measurement and monitoring of hangingwalls and pillar deformation have been undertaken. Despite initial failures, information can be used to understand complex mechanisms in the mine environment and predict future mining condit__ions. 885426 New roadheader outperforms high expectations Reiss, H G; Weber, B World Min Equip VII, NIO. Oct 1987, P20-21 A fleet of 4 ET-I l0 roadheaders is used for fully mechanised retreat mining in Iongwalls up to 250m long at Sophia Jacoba colliery, West Germany. Design constraints imposed by drifting work, selection of optimum pick type and the advantages of this type of roadheader are discussed. 885427 Stability of abandoned mine workings in the Maastrichtian limestone of Limburg, The Netherlands Price, D G; Verhoef, P N W Proc 23rd Annual Conference of the Engineering Group of the Geological Society, Engineering Geology of Underground Movements, Nottingham, 13-17 Sept 1987 P219-238. Publ Nottingham: University of Nottingham. 1987 The geology and mechanical properties of the Limburg deposits are first described. The rock is generally weak, with unconfined compressive strength less than 5MPa, and problems have arisen because of pillar collapse and inflow of water from solution pipes. A stability analysis procedure for the mine pillars is presented. Data for use in the analysis can be obtained by in situ seismic refraction studies. 885428 Integrated automization of Iongwall mining system Kuroda, H; Nishimura, K; Esaki, M Proc 13th Worm Mining Congress, Improvement of Mine Productivity and Overall Economy by Modern Technology, Stockholm, June 1987 VI, P325-334. Publ Rotterdam: A A Balkema, 1987 A summary of automated mining equipment operated at Miikc Colliery, Japan - Remote Batch Control System and automated drum shearer. Includes results of continuous monitoring of the Iongwall mining system which led to some modification of the integrated automated system.

885429 Automation and robotics for Iongwali faces in level workings Demoulin, J; de Janti, P V Proc 13th World Mining Congress, Improvement of Mine Productivity and Overall Economy by Modern Technology, Stockholm, June 1987 VI, P335-344. Publ Rotterdam: A A Balkema, 1987 Automation has been developed in the Lorraine coalfield area to increase productivity and improve working conditions and safety. The system used has hydraulic prop supports connected to the armoured face conveyor (AFC),which provides the travelling track for a double ended shearer. A remote control system allows monitoring from underground or on the surface and offers the shearer driver safer, less dusty working conditions. 885430 New systems for coal extraction with special applications for rib pillar extraction and pillar extraction Obermaier, H; Urschitz, E; Habenicht, H Proc 13th Worm Mining Congress, Improvement of Mine Productivity and Overall Economy by Modern Technology, Stockholm, June 1987 I,'2, P461-469. Publ Rotterdam: A A Balkema, 1987 Maximising coal output whilst minimising capital input for the mining of flat coal seams using pillar or rib pillar extraction methods is examined. New self-propelled shield supports have been developed for use in conjunction with a heavy duty mining machine, either as a heading system or an extraction system. Economics of this method are compared with those for Iongwall mining. 885431 Optimization of system design for fully mechanized faces to reduce investment Zhang Shengtao; Cai Dian Proc 13th World Mining Congress, Improvement of Mine Productivity and Overall Economy by Modern Technology, Stockholm, June 1987 I/2, P471-477. Publ Rotterdam: A A Balkema, 1987 Maximum economic return in fully mechanised coal mining requires selection of optimum roof support system. To ensure geological and support compatibility, a system of roof classification has been developed in China, based mainly on thickness of immediate and nether roofs, strata thicknesses, seam extraction height, and initial collapsing interval of immediate and nether roofs. 885432 Large mechanised open stoping of limestone at Baltar mine Benedetti, N M; Prati, F J; Nakamura, R Proc 13th Worm Mining Congress, Improvement of Mine Productivity and Overall Economy by Modern Technology, Stockholm, June 1987 V2. P517-524. Publ Rotterdam: A A Balkema, 1987 Operation of a large underground limestone mine in Brazil is described. The geology was first established. A feasibility study examined extraction methods which would allow large scale mechanisation for economic reasons, and maintenance of the intact mine roof against water inflow from an overlying river. Sublevel stoping was chosen. Laboratory testing of rock materials, in situ stress measurement and finite element modelling assisted in the design process. The mine is now operating successfully.

1988 Pergamon Press pie. Reproduction not permitted