Longwall roof stability prediction model for BMA’s Broadmeadow Mine

Gannon, Verity (2006). Longwall roof stability prediction model for BMA’s Broadmeadow Mine B.Sc Thesis, School of Engineering, The University of Queensland.

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Author Gannon, Verity
Thesis Title Longwall roof stability prediction model for BMA’s Broadmeadow Mine
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2006
Thesis type B.Sc Thesis
Supervisor Mehmet Kizil
Total pages 72
Language eng
Subjects 091405 Mining Engineering
Formatted abstract
 An analysis of the cycles experienced by the Broadmeadow Mine was undertaken to identify support and roof condition issues. Values for the time weighted average pressure, yield events, low set pressures and cycle times were interpreted from the data extracted from the longwall face. It was discovered that all of these factors affect the mining conditions experienced on the face and that it is essential to understand the affect of these factors to control the mining conditions. These factors were analysed using a new computer program based on the work of Truman et al (2005) and the loadcycle identification work by Peng (1998). It was concluded from this project that the faulted area and periodic weighting conditions on the wall could be mined more effectively if a different approach was taken when mining through these areas. Currently little impact of these conditions was noted on production. However, as the mine progresses deeper and further to the east, there will be increased stress placed on the mechanical supports, producing a greater need to understand these factors and foreshadow the impending roof conditions.

The research to date confirmed that the thick extensive sandstone unit in the main roof can impact upon the mining conditions. It is recommended that mining strategies are put into place to ensure that mining conditions are dealt with effectively. The future for this work will enable an on-line system to be created that will allow longwall operators to visualise the pressures on the longwall and to understand how to operate under specific loading conditions. Other future developments from this research include the creation of a commercial prediction model. This model will prevent mines from mining blindly through the longwall block as there is some indication of the future conditions based on the prediction model.
Keyword Stability analysis
Mining activities

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
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Created: Wed, 03 Sep 2014, 15:37:43 EST by Jessica Minshull on behalf of Scholarly Communication and Digitisation Service