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Stability prediction for the Zinkgruvan Mine, Central Sweden
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851123 Use of computer applications at BCL Limited in planning pillar extraction and the design of mining layouts Von Kimmelmann, M R; Hyde, B; Madgwick, R J Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P53-63. Publ London: British Geotechnical Society, 1984
851128 Recent developments in hard rock mining in South African gold mines Waddams, J A Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P285293. Publ London: British Geotechnical Socieo', 1984
A three dimensional stress analysis program has been introduced into use at the Phikwe and Selebi mines, Botswana. The program has been used to estimate stresses on existing pillars and a back analysis of observed pillar behaviour has resulted in the derivation of a simple pillar dimension versus strength relationship. The program has assisted in the design of pillars and in the planning of future mining strategy.
Four recent projects are described: the OFS Seismic Project: the Rockburst Project to investigate all aspects of stress related problems in deep gold mines; the Prediction Project aimed at predicting rock bursts and developing an early warning system: and the Fill Project to develop a system of easy placement of fill material in a flat tabular stope. Developments in mechanised systems for excavation are also examined.
851124 Geomechanics principles of planning mine workings Amusin, B Z; Ardashev, K A; Basinsky, Y M Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P81-87. Publ London: British Geotechnical Society, 1984
851129 Road header application for driving sloping tunnels in Western Kentucky Pyro Coal Mine Company Unrug, K F; Whitsell, S R Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P313319. Publ London: British Geotechnical SocieO', 1984
The geotechnical aspects to be considered in mine planning are examined. An automated planning system which includes geotechnical considerations is described.
851125 Rock mechanics design concepts for post-pillar cut-and-fill underground mines Bello-Maldonado, A A Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P89-96. Publ London. British Geotechnical Society, 1984 Large rooms with small pillars combined with the cut and fill procedure is a convenient method of mining orebodies with significant dip. Stability analysis of such a system involves 4 design concepts: spacing between pillars; pillar shape and dimensions; reinforcement of ceilings; and stability of the outer walls.
851126 Stability prediction for the Zinkgruvan Mine, Central Sweden Borg, T; Leijon, B; Roshoff, K; Stephansson, O Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P113121. Publ London." British Geotechnical Society, 1984 A new approach for performing rock stress measurements in open stopes and drifts was tested. An elastic F E M model and strain failure criteria were applied to predict the future condition of the mine. Limits of the strain failure criteria were based on strain values obtained from the model, observations of rock falls, and major failures in the mine. These limits were used to assess suitable panel height, sill pillar dimensions, and sequence delays for mining parallel ore bodies.
851127 Open stope design at the research mine in Kiruna, Sweden Stillborg, B L Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P273283. Publ London." British Geotechnical Society. 1984 Summarises the rock mechanics research carried out in an open stope mining layout at the research mine in the Luossavaara orebody, Sweden. The stability of the stopes is examined together with the design of reinforcement. The data acquisition system used is described.
To open the No 9 seam at the Western Kentucky Pyro Coal Mine Company's operation, a slope was driven from the No I 1 seam down to the No 9 seam. A second slope was driven from the surface to the No 11 seam. A roadheader was used to do this, the first time in Western Kentucky.
851130 Deformation of a deep mine shaft inset during construction in coal measures works Farmer, I W; Shelton, P D Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P375381. Publ London: British Geotechnical Socieo'. 1984 During construction of a horizontal inset to a mine shaft at a depth of 764m in Coal Measures strata at the Riccall Mine, Yorkshire, UK, deformation of the 8.3m wide by 19m long excavation was monitored. Strains in the reinforced concrete inset lining were measured after construction. The case history illustrates the relation between deformation or relaxation of an underground excavation during construction and the subsequent pressure exerted on a lining. Auth.
851131 Analysis of soft floor interaction in underground mining at an Illinois basin coal mine Chugh, Y P; Caudle, R D; Bandopadhay, C Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P383390. Publ London: British Geotechnical Society, 1984 This paper presents the results of analytical and field studies to analyse the effects of soft floor on underground room-andpillar mining. Two-dimensional finite element analyses were utilized to analyse the effect of soft floor on stress distribution in and around mine openings and coal pillars during mine development and retreat mining. Field studies involved measurement of convergence and sag in roadways and intersections during mine development and retreat mining, bearing capacity of floor, and measurement of pillar deformations ahead of retreat mining. The analytical and field studies data were utilized to prepare: (1) design charts for determining the safe percentage of coal extraction to minimize floor heave for varying soft floor thickness, and strength of underclay, and (2) guidelines to contain floor heave. Auth.
851123 Use of computer applications at BCL Limited in planning pillar extraction and the design of mining layouts Von Kimmelmann, M R; Hyde, B; Madgwick, R J Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P53-63. Publ London: British Geotechnical Society, 1984
851128 Recent developments in hard rock mining in South African gold mines Waddams, J A Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P285293. Publ London: British Geotechnical Socieo', 1984
A three dimensional stress analysis program has been introduced into use at the Phikwe and Selebi mines, Botswana. The program has been used to estimate stresses on existing pillars and a back analysis of observed pillar behaviour has resulted in the derivation of a simple pillar dimension versus strength relationship. The program has assisted in the design of pillars and in the planning of future mining strategy.
Four recent projects are described: the OFS Seismic Project: the Rockburst Project to investigate all aspects of stress related problems in deep gold mines; the Prediction Project aimed at predicting rock bursts and developing an early warning system: and the Fill Project to develop a system of easy placement of fill material in a flat tabular stope. Developments in mechanised systems for excavation are also examined.
851124 Geomechanics principles of planning mine workings Amusin, B Z; Ardashev, K A; Basinsky, Y M Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P81-87. Publ London: British Geotechnical Society, 1984
851129 Road header application for driving sloping tunnels in Western Kentucky Pyro Coal Mine Company Unrug, K F; Whitsell, S R Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P313319. Publ London: British Geotechnical SocieO', 1984
The geotechnical aspects to be considered in mine planning are examined. An automated planning system which includes geotechnical considerations is described.
851125 Rock mechanics design concepts for post-pillar cut-and-fill underground mines Bello-Maldonado, A A Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P89-96. Publ London. British Geotechnical Society, 1984 Large rooms with small pillars combined with the cut and fill procedure is a convenient method of mining orebodies with significant dip. Stability analysis of such a system involves 4 design concepts: spacing between pillars; pillar shape and dimensions; reinforcement of ceilings; and stability of the outer walls.
851126 Stability prediction for the Zinkgruvan Mine, Central Sweden Borg, T; Leijon, B; Roshoff, K; Stephansson, O Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P113121. Publ London." British Geotechnical Society, 1984 A new approach for performing rock stress measurements in open stopes and drifts was tested. An elastic F E M model and strain failure criteria were applied to predict the future condition of the mine. Limits of the strain failure criteria were based on strain values obtained from the model, observations of rock falls, and major failures in the mine. These limits were used to assess suitable panel height, sill pillar dimensions, and sequence delays for mining parallel ore bodies.
851127 Open stope design at the research mine in Kiruna, Sweden Stillborg, B L Proc I S R M Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P273283. Publ London." British Geotechnical Society. 1984 Summarises the rock mechanics research carried out in an open stope mining layout at the research mine in the Luossavaara orebody, Sweden. The stability of the stopes is examined together with the design of reinforcement. The data acquisition system used is described.
To open the No 9 seam at the Western Kentucky Pyro Coal Mine Company's operation, a slope was driven from the No I 1 seam down to the No 9 seam. A second slope was driven from the surface to the No 11 seam. A roadheader was used to do this, the first time in Western Kentucky.
851130 Deformation of a deep mine shaft inset during construction in coal measures works Farmer, I W; Shelton, P D Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P375381. Publ London: British Geotechnical Socieo'. 1984 During construction of a horizontal inset to a mine shaft at a depth of 764m in Coal Measures strata at the Riccall Mine, Yorkshire, UK, deformation of the 8.3m wide by 19m long excavation was monitored. Strains in the reinforced concrete inset lining were measured after construction. The case history illustrates the relation between deformation or relaxation of an underground excavation during construction and the subsequent pressure exerted on a lining. Auth.
851131 Analysis of soft floor interaction in underground mining at an Illinois basin coal mine Chugh, Y P; Caudle, R D; Bandopadhay, C Proc ISRM Symposium on Design and Performance of Underground Excavations, Cambridge, 3-6 Sept 1984 P383390. Publ London: British Geotechnical Society, 1984 This paper presents the results of analytical and field studies to analyse the effects of soft floor on underground room-andpillar mining. Two-dimensional finite element analyses were utilized to analyse the effect of soft floor on stress distribution in and around mine openings and coal pillars during mine development and retreat mining. Field studies involved measurement of convergence and sag in roadways and intersections during mine development and retreat mining, bearing capacity of floor, and measurement of pillar deformations ahead of retreat mining. The analytical and field studies data were utilized to prepare: (1) design charts for determining the safe percentage of coal extraction to minimize floor heave for varying soft floor thickness, and strength of underclay, and (2) guidelines to contain floor heave. Auth.