If you have access to OneMine as part of a member benefit, log in through your member association website for a seamless user experience.
In-Situ Coal Strength Determination - Case Studies
×
Citation (Style = APA)
Unrug, Kot F. (1995). In-Situ Coal Strength Determination - Case Studies. Proceedings of 14th International Conference on Ground Control in fining
Citation Downloads
Reference Manager (RIS)
SpreadSheed (CSV)
Unrug, Kot F. (1995). In-Situ Coal Strength Determination - Case Studies. Proceedings of 14th International Conference on Ground Control in fining
Citation Downloads
Reference Manager (RIS)
SpreadSheed (CSV)
Organization: International Conference on Ground Control in Mining
Pages: 10
Publication Date:
Jan 1, 1995
Email to a Friend
Abstract
Abstract
| Strength of coal is one of the governing factors in size determination of mine pillars, and therefore affects the percentage of extraction and thus, utilization of reserves. Coal strength is also important from the subsidence control standpoint, where mine pillars with appropriate safety factors should be designed for long term stability. Determination of coal seam strength has been addressed through the extrapolation of the coal strength obtained from a small number of samples on the whole section of the seam. This procedure often gives unreliable results. Presented in this paper is a method of in-situ strength testing of coal, allowing for a realistic determination of seam strength. Results of a field case study dealing with the coal seam, where samples for the laboratory strength tests could not be obtained due to the dense cleat, are presented. However, in these conditions, the in-situ testing was successful. A comparison of both conventional and the in-situ penetrometer method was carried out. It was found that the penetrometer data not only improve the accuracy of strength determination of the entire seam, but also prove to be much more cost effective than the conventional method on a per test basis. |
Full Article Download:
