http://hdl.handle.net/10204/2642 Wed, 22 May 2013 12:48:57 GMT 2013-05-22T12:48:57Z http://hdl.handle.net/10204/2794 Title: Collaborative spatial analysis and modelling in a research environment Authors: Naudé, A; McFerren, G Abstract: The paper deals with the results of CSIR work to develop a platform for Collaborative Spatial Analysis and Modelling (referred to as CoSAMP). The platform is aimed at addressing a range of “collaboration divides and barriers” - including bandwidth constraints, other hard, technical interoperability barriers and a range of “softer” barriers (such as inadequate management and sharing of spatial analysis knowledge).The potential advantages of using this platform are illustrated with reference to a hypothetical use case: the commissioning of a researcher to support an intergovernmental planning team with the development of service access and livelihood indicators - assuming that this team needs these indicators to target housing subsidies, population- serving facilities (such as clinics) and related infrastructure Description: CSIR Research and Innovation Conference: 1st CSIR Biennial Conference, CSIR International Convention Centre Pretoria, 27-28 February 2006 Wed, 01 Feb 2006 00:00:00 GMT http://hdl.handle.net/10204/2794 2006-02-01T00:00:00Z http://hdl.handle.net/10204/2775 Title: Development of a sine-dwell ground vibration test (GVT) system Authors: van Zyl, L; Wegman, E Abstract: Knowledge of the natural modes of vibration of a structure is required to solve or avoid vibration and flexibility problems in industrial, automotive, aerospace and civil engineering applications. All new aircraft must undergo a flutter clearance to ensure that it will be free from flutter within the intended operating envelope. Long-span bridges are also subject to flutter, and high-rise buildings can oscillate severely in high winds. Vibrations in industrial installations are also quite common and are often due to the unfortunate matching of an excitation frequency and a natural frequency of the installation. The methods of determining the natural modes of a structure are continually evolving, and this paper describes one GVT system with some novel features Description: CSIR Research and Innovation Conference: 1st CSIR Biennial Conference, CSIR International Convention Centre Pretoria, 26-27 February 2006 Mon, 27 Feb 2006 00:00:00 GMT http://hdl.handle.net/10204/2775 2006-02-27T00:00:00Z http://hdl.handle.net/10204/2755 Title: Study of the stability mechanism within shallow mining operations that will impact on the sustainability of platinum mines Authors: Watson, BP; Coetzer, S; Singh, N; Flanagan, F Abstract: Support in shallow platinum mining operations is typically provided by in-stope pillars with width-to-height ratios of 3:1. A significant percentage of ore reserves is locked up in these pillars, which reduces the life of mine. In the mid 1990s, a mine in the Rustenburg area removed in-stope pillars over an area of 500 m x 140 m on the Merensky Reef horizon without any incidence of instability. This provided a unique opportunity to study rockmass characteristics under large-span conditions. The ability to either partially or fully extract in-stope pillars has positive implications towards ensuring the sustainability of mining within the Bushveld Complex. It has been determined that, if all pillars created in a single year across the Bushveld Complex were reduced in size by 1.0 m, approximately R1.0 billion profit could be realised by the platinum mining industry annually (based on 2004 prices and costs). The work to be presented will describe the stability mechanisms, determined from data obtained via instrumentation, observations, numerical and analytical techniques Description: CSIR Research and Innovation Conference: 1st CSIR Biennial Conference, CSIR International Convention Centre Pretoria, 27-28 February 2006 Mon, 27 Feb 2006 00:00:00 GMT http://hdl.handle.net/10204/2755 2006-02-27T00:00:00Z http://hdl.handle.net/10204/2754 Title: High-resolution, short-range, in-mine geophysical techniques for the delineation of South African orebodies Authors: van Schoor, M; du Pisani, P; Vogt, D Abstract: The two major precious metal ore deposits of South Africa, the Bushveld Complex (platinum) and the Witwatersrand Basin (gold), exhibit remarkable lateral continuity on a regional scale. Consequently, the geometry of the respective planar orebodies is relatively easy to predict ahead of mining development ends. However, on a local in-mine scale, the geometry of these orebodies is far less predictable due to the presence of disruptive geological features such as faults, rolls, terraces, potholes, iron-rich ultramafic pegmatite (IRUP) bodies and dykes. The occurrence of these features compromises mine planning, production and safety. This paper illustrates how the use of high-resolution geophysical techniques can provide valuable geological and rock engineering information ahead of mining, making mining operations safer and more cost-effective Description: CSIR Research and Innovation Conference: 1st CSIR Biennial Conference, CSIR International Convention Centre Pretoria, 27-28 February 2006 Tue, 28 Feb 2006 00:00:00 GMT http://hdl.handle.net/10204/2754 2006-02-28T00:00:00Z