Author:La Grange, CCDate:1950The problem created by the spontaneous heating of coal has been receiving attention for more than 100 years and many investigators have worked on problems directly or indirectly associated with this phenomenon.Read more
Author:Erasmus, TCDate:1973A sample of Landau low-ash coal was submitted by the T.C.O.A and was tested in the Institute's experimental bunkers to assess the liability of this coal towards spontaneous combustion.Read more
Author:Curtayne, PC; Walker, RNDate:26 Jan 2009The need for describing the condition of pavements occurs frequently in highway engineering. Accurate descriptions are a prerequisite for establishing procedures with which to evaluate the various aspects of the pavement condition. A variety ...Read more
Author:Cooper, Antony KDate:Jun 1993The purpose of this dissertation is to assess digital geo-referenced information and standards for exchanging such information, especially the South African National Exchange Standard (NES). The process of setting up a standard is exacting. ...Read more
Author:Gee, EDate:Aug 1976Some of this data together with data as yet unpublished, were used in this present report with the object of obtaining a statistical assessment of the accuracy of the MSS (Mean Spindle Speed) at break technique.Read more
Author:Roberts, MKCDate:Dec 1995This project had two objectives namely: Develop a rationale for the design of stope support systems. Determine support resistance criteria for the support of stope gullies for both static and dynamic loading and develop improved support systems ...Read more
Author:La Grange, CCDate:1951This paper investigates the storage of coal with regards to specifically coal deterioration and combustion properties.Read more
Author:La Grange, CCDate:1951Although the storage of coal is probably almost as old as its use and is practiced on a smaller or larger scale by all coal consumers, there are certain aspects and problems associated with coal storage, which require very careful consideration ...Read more
Author:Viljoen, GADate:1973Amplifier to be described was developed and built as a requirement for the "Delayed Coking" apparatus constructed at the Institute.Read more
Author:Bonapace, ACDate:1977The friction factor of a stream carrying a fully suspended load of particles is analyzed. Friction factors of the suspension coincide with those of the pure liquid, if referred to the actual fluid velocity, i.e. less than the friction factors ...Read more
Author:Hall, GC; Gorgens, AHMDate:Mar 1978Several South African rivers are polluted by mineral salts of diffuse source. This pollution can be related to geological phenomena and to irrigation practices. Mineralization is problematic in that it can render surface waters unsuitable for ...Read more
Author:Sevenster, PGDate:1958The experimental conditions in such investigations were usually chosen to stimulate those encountered in practice and generally do not lend themselves to the study of the fundamental processes involved in the absorption of gasses and vapors ...Read more
Author:Van Rooyen, B; Hunter, IM; Slinger, RIDate:Nov 1971This report details the relationship between the values obtained on a Shirley Constant tension Winding ester and certain yarn properties, such as tensile strength, irregularity, twist etc.Read more
Author:Sevenster, PG; Meintjies, ADate:1964This paper is concerned with a different type of coal degradation which occur not only in coal already broken from the seam but is also noted on exposed faced in the workings of collieries where it may cause dangerous working conditions.Read more
Author:Van der Walt, PJDate:1950Although the union of South Africa possesses reasonably large reserves of coal of various qualities, the reserves of coking coal are comparatively small and are being exhausted at an alarming rate. The proven reserves of coking coal are ...Read more
Author:Streicher, SFDate:1964The application of mechanical mining methods in the coal in increase fines production and decrease the selectively in mining.Read more
Author:Muller, EFEDate:1973The weathering or atmospheric oxidation of coal as evidence by change of properties, especially the coking propensity, is becoming of increasing importance now that low-ash blend coking coal from the Witbank area is being exported to Japan.Read more
Author:Scholes, RJ; Savage, MJDate:1989The parameters used to describe the flow of water, and energy to a lesser extent, through the soil-plant-atmosphere continuum are reviewed and the techniques used for estimating their values contrasted. The measurements which are necessary ...Read more
Author:Theyse, HLDate:Feb 2002Masters Degree Thesis: HL Theyse - The development of mechanistic-empirical permanent subgrade deformation models from heavy vehicle simulator data.
The work was aimed at improving the accuracy of one of the components of a flexible pavement ...Read more