Semester
Spring
Date of Graduation
1987
Document Type
Thesis
Degree Type
MS
College
Statler College of Engineering and Mineral Resources
Department
Mining Engineering
Abstract
The intricate relationship that exists between the regional and local geology with ground instability in coal mines has been identified as an important factor that has to be well understood and addressed in any coal mining operation.
In this thesis the regional geology of the Swaziland coalfield has been described. A detailed account of the mine geology is also presented with special emphasis being given to the geological structures or disturbances that directly affect ground control.
Both the traditional and a two-dimensional finite element method of investigation have been carried out in order to determine the causes and mechanisms of the failure of coal pillars at a section in the mine. The results show the premining shearing of the coal seam, which was caused by the hydrostatic implacement of a major dolerite sill, adversely affected the bearing capacity of subsequent coal pillars.
The failure of coal pillars, whether controlled or uncontrolled, in a room and pillar mining operation may result in noticeable and destructive surface displacement. The results of a subsidence field study over a collapsed section at the mine are presented and discussed.
Recommended Citation
Mokgokong, Pius Sosthenes, "A GROUND CONTROL STUDY OF THE EMASWATI COAL MINE" (1987). Graduate Theses, Dissertations, and Problem Reports. 12628.
https://researchrepository.wvu.edu/etd/12628