Banjwa, P, Andrews, PG & Morkel, IG 2024, 'The effectiveness of preconditioning: utilising mXrap for analysing data and transforming raw scans into a functional database', in P Andrieux & D Cumming-Potvin (eds), Deep Mining 2024: Proceedings of the 10th International Conference on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 1253-1264, https://doi.org/10.36487/ACG_repo/2465_82
(https://papers.acg.uwa.edu.au/p/2465_82_Banjwa/)
Abstract: Preconditioning in mining face areas prone to strainbursting is one of the most effective controls available to the geotechnical engineer. Although historical studies have focused on conventional narrow-reef tabular mining, the same outcomes can be assumed for high-profile de-stress excavations as utilised at Gold Fields’ South Deep mine, i.e. 6 × 5.5 m (width to height). As a concept, preconditioning dates to the early 1950s, indicating its longstanding relevance in mining operations. South Deep utilises a face perpendicular preconditioning technique which is 1.5 m longer than the normal blast round. 
In contemporary mining operations, the effective utilisation of data plays a pivotal role in enhancing safety protocols and operational efficiency. This paper delves into the use of an IGM Geotechnical (IGM) mXrap application for visualising (the interface) and analysing data collected underground using the Sub-Surface Profiler (SSP). The application specifically focuses on transforming raw scans into functional data, which helps in assessing the effectiveness of face preconditioning.
Through a combination of case studies (including the use of borehole cameras in the calibration phase) and theoretical analysis, the tangible benefits of employing the IGM application/mXrap, including improved accuracy, reduced processing time and enhanced decision-making capabilities for determining face preconditioning accuracy using a non-invasive method like the SSP, are showcased. Additionally, the integration of mXrap into existing mining frameworks is discussed and potential avenues for further development are highlighted. The findings presented underscore the significance of leveraging technology to optimise preconditioning processes and procedures to pave the way for a safer and more efficient mining operation.

Keywords: preconditioning, de-stress, Sub-Surface Profiler, scans, surveys, borehole camera, borehole logging, database, mXrap