Ground condition mapping: a case study.
Lawson-H; Zahl-E; Whyatt-J
2012 SME Annual Meeting, February 19 - 22, Seattle, Washington, Preprint 12-122. Englewood, CO: Society of Mining, Metallurgy and Exploration, Inc., 2012 Feb; :579-584
The Mine Safety and Health Administration (MSHA) issued Program Information Bulletin P09-03 in April of 2008, providing formal guidance on using programs that model the redistribution of stress during underground mining of coal. A key part of this guidance is visual observation and mapping of ground conditions. If a correlation between ground conditions and model output can be established, the model is considered to be verified, and can be used to guide mine design in similar ground.A simple scale is recommended for ranking observed roof, rib, and floor conditions. This paper discusses optimization and implementation of a ground condition rating scheme in the gateroads of a deep underground longwall coal mine. Roughly 80% of each gateroad length deteriorated in a fairly uniform manner. However, this manner varied between gateroads, as did pillar size. The implementation of a ground condition mapping program, similar to that recommended in PIB 09-03, was successful in characterizing the ground response to mining in gateroads of a longwall coal mine.
Mining-industry; Underground-mining; Ground-stability; Ground-control; Structural-analysis; Coal-mining; Longwall-mining; Models; Analytical-models; Analytical-instruments; Visual-images; Visual-aids; Regulations; Safety-monitoring; Safety-measures; Safety-engineering
2012 SME Annual Meeting, February 19 - 22, Seattle, Washington, Preprint 12-122