Bathymetric survey of flooded open cast mine workings

Surtees, Mark Stephen James (2009) Bathymetric survey of flooded open cast mine workings. [USQ Project] (Unpublished)

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Abstract

As an open cast mine reaches its economic limit many companies are deciding to leave a void up against the final high wall which subsequently fills up with water and deposited material. Sedimentation and deposited material build up in flooded open cast mine workings and is not being accounted for in the future mine plan and cost modelling phase of these areas. To understand this anomaly of additional overburden removal and pumping requirements, a bathymetric sounding survey is required so that overburden and coal extraction productivity rates can be more accurately determined. Bathymetry data can be collected using a wide variety of sensors including: lead lines, single beam and multi beam acoustic depth sounders, as well as airborne laser sensors, but are usually collected as a series of cross section lines. Bathymetric techniques will be analysed to determine whether inexpensive bathymetric equipment coupled with Real Time Kinematic (RTK) Global Positioning System (GPS) technology can provide a high level of precision, accuracy and what effect different transect and point spacing have on the accuracy of the volumes of deposited material. Only lead line, single and multi beam acoustic techniques will be considered due to the remoteness and cost constraints for this project. A low cost digital single beam echo sounding system unit coupled with RTK GPS for positioning and navigation, temporarily installed in an over–the-side configuration on a small fibreglass boat, was employed for this project along with recommendations with respect to the logistical suitability of this method and its ability to achieve desired accuracy and precision. This research project validated that RTK GPS coupled with inexpensive digital bathymetric sounding equipment may be utilised effectively, is a viable solution to this problem and has identified possible further research


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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Surveying and Land Information
Date Deposited: 16 Jul 2010 04:31
Last Modified: 16 Jul 2010 04:32
Uncontrolled Keywords: bathymetric survey; open cast mine; acoustics; lead line; GPS
Fields of Research (FOR2008): 09 Engineering > 0909 Geomatic Engineering > 090906 Surveying (incl. Hydrographic Surveying)
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091405 Mining Engineering
URI: http://eprints.usq.edu.au/id/eprint/8406

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