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Abstract

Summary

Blasting damage to coal seam tops due to incorrect blast stand-off distances is a serious issue in Australian coal mining industry, resulting in coal losses of up to 10-15%. The problem stems from a lack of accurate coal-top location information to inform the driller when to stop drilling and to date, no effective and economically-sound techniques have been developed that map and characterize coal seam exact location and structures in the open cut environment. We propose to use a new forward-looking imaging technique based on the borehole radar (BHR) technology to predict the coal seam top in real-time, while drilling blast-holes, to reduce coal top damage and subsequent loss of product. This is achieved by electrically coupling the conventional BHR waves on to a conductive wire or steel drill-rod to induce a guided wave along the axial drill-rod. The drill-rod ahead of the BHR behaves as a forward-looking antenna for the guided waves. Field trials at Australian open-cut coal mines to test the feasibility of the proposed technique demonstrated that guided BHR waves could be observed and used for prediction of coal top ahead of drill bit during blast-hole drilling in resistive open cut environments.

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/content/papers/10.3997/2214-4609.201900430
2019-04-24
2024-04-27

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201900430
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Prediction of Coal Top by Conductively-Guided Borehole Radar Waves: Results from Field Trials
Conference Proceedings 2019, 1 (2019); https://doi.org/10.3997/2214-4609.201900430
/content/papers/10.3997/2214-4609.201900430
/content/papers/10.3997/2214-4609.201900430
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