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Monitoring Subsidence Over Submarine Coal Mines In The Sydney Coalfield By Bathymetric Methods
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Forrester, David (1996). Monitoring Subsidence Over Submarine Coal Mines In The Sydney Coalfield By Bathymetric Methods. Proceedings 15th International Conference On Ground Control In Mining
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Forrester, David (1996). Monitoring Subsidence Over Submarine Coal Mines In The Sydney Coalfield By Bathymetric Methods. Proceedings 15th International Conference On Ground Control In Mining
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Organization: International Conference on Ground Control in Mining
Pages: 1
Publication Date:
Jan 1, 1996
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Abstract
Abstract
| Subsidence beneath the land surface has traditionally been monitored using the most accurate surveying methods of the day. Over the several hundred years of subsidence investigation, these techniques have improved, and thus the accuracy of subsidence measurements has improved. In circumstances where the subsiding surface is masked by water or rock, novel methods must be developed. This method describes the recent successes of subsidence monitoring using advanced bathymeric techniques in the Sydney Coalfield. In order to obtain subsidence profiles above submarine coal extractions, seafloor bathymetry surveys, run before and after mining, have shown that subsidence profiles can be detected, despite the primitive nature of some of the trials. Very recently, there have been considerable advances in this field, associated with the availablity of high-powered personal computers to control data collection and analyse the results. The recent surveys described in this paper have demonstrated the considerable potential for such methods. This paper describes bathymetric subsidence monitoring developed in the Sydney Coalfield, illustrated with some typical results, and summarizes the findings of the research leading to the development of subsidence design criteria specific to the Sydney Coalfield. |
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