Author:Haile, AT; Jager, AJ; Wojno, LDate:Dec 1995This project report addresses the issue of strata control in tunnel excavations with the aim of improving the stability of the excavation through improved design methodologies and support systems.Read more
Author:Haile, AT; Jager, AJDate:Dec 1995This project report gives an overall view of the rock mass environment of the Bushveld complex and influence on the mine design practices. The main focus of the project was to survey the currently available data and conduct further analysis ...Read more
Author:Madden, BJ; Canbulat, I; Jack, BW; Prohaska, GDDate:Dec 1995The SIMRAC project COL 021A entitled “a reassessment of coal pillar design procedures” set out to achieve a coal pillar design procedure that takes cognisance of different geological and structural factors as well as the influence of the ...Read more
Author:Johnson, RDate:Dec 1995The aim of this long-term project has been to focus on the extreme high-stress end of the mining spectrum. Such high stress conditions will prevail in certain ultra-deep mining operation of the near future, and are already being experienced ...Read more
Author:Johnson, RDate:Dec 1995A questionnaire related to mining at great depth and in very high stress conditions has been completed with the assistance of mine rock mechanics personnel on over twenty mines in all mining districts, and covering all deep level mines. The ...Read more
Author:Haile, AT; Jager, AJDate:Dec 1995The overall view of the research being conducted at Impala platinum was to improve pillar design techniques through a rock testing programme, underground instrumentation and back analysis. The laboratory rock testing programme has provided a ...Read more
Author:Unsted, ADDate:Mar 1996The origin of the project SIMGAP project GAP046, were rooted in the industry’s need to establish the viability of such a simplification of sampling procedures. Extensive investigations were conducted at three underground sites and one surface ...Read more
Author:Hecker, GFK; Van Zyl, MNDate:Apr 1996The steering committee on factors of safety of winder ropes has appointed a working group to draw up a set of proposals for changing the regulations governing the required rope strength in the Minerals Act. Certain research projects have been ...Read more
Author:Borrello, M; Van Zyl, MN; Wainwright, EJDate:Apr 1996Previous work which was carried out on splice demonstrated that the efficiency of this type of termination was sensitive to both rigger skill and operating loads. It was therefore suggested that future research should be aimed at identifying ...Read more
Author:Wainwright, EJ; Kuun, TC; Borello, M; Hecker, GFKDate:Apr 1996An objective of this study guide for “wire rope inspectors” was to provide an overview of the training modules and to identify the most important features of winder operation and rope inspection.Read more
Author:Hecker, GFKDate:Apr 1996The current South African regulations for sizing of mine winder ropes were introduced during 1956, based mainly on circumstantial evidence. A more rational approach was required to meet the demands for improved guarantees of safety and for ...Read more
Author:Hecker, GFK; Kroonstuiver, JDate:Apr 1996This research study attempts to determine the maximum rope force in the rope of a mine winding system subsequent to a break control system failure. Four different winder ropes were evaluated: a 4000m Blair multi system; a 2300m Blair multi ...Read more
Author:Meyer, C; Du Plessis, JJL; Oberholzer, JWDate:Apr 1996An urgent need has been identified by the coal mining industry, the department of Mineral and energy affairs, and the unions regarding information to enable mine operators to address the dust problem. This handbook flows out of a SIMRAC funded ...Read more
Author:Borrello, M; Kuun, TC; Wainwright, EJ; James, A; Hecker, GFKDate:Jun 1996The aim of this investigation was the verification of the code of Practice for Rope Condition Assessment. Ropes were meant to be discarded according to the discard criteria as outlined in the code and then tested by the CSIR. The results of ...Read more
Author:Goldbach, ODDate:Sep 1996This report presents examples of possible scenarios in which the proposed technique may be practical implemented in scattered, longwall and sequential grid mining environment.Read more
Author:Van Zyl, FJ; Linzer, PDate:Oct 1996Methane levels have been continuously monitored and recorded, at several positions, on and around continuous miners and road headers during mining operations. This has been achieved using a data logger system recording input from six methanometers ...Read more