34th Annual UMBC McNair & Undergraduate Research National Conference

Accurate measurement of the in-situ strength of cemented paste backfill (CPB) is essential for effective mining operations but remains challenging due to the limitations of current methods. This study introduces a novel hydraulic fracturing technique designed to enhance the precision and cost-effectiveness of CPB strength assessment. The objective was to develop a hydraulic fracturing system that utilizes pressure-time curve analysis to determine late-stage strength of pastefill.

The proposed technique involves applying hydraulic fracturing to measure pressure-time curves during the fracturing process. By analyzing these curves, we can accurately define the strength of CPB at late stages, addressing a critical gap in existing measurement techniques. The developed system is both practical and economically viable, making it suitable for widespread adoption by mining operators.

Our results show that this method provides reliable and precise strength data, significantly improving upon traditional approaches. The ability to measure in-situ strength more accurately while reducing costs represents a notable advancement in mining technology.

The significance of this work lies in its potential to enhance safety and operational efficiency. By offering a more accurate and cost-effective solution for strength measurement, this technique enables better-informed decision-making and improved backfill management practices, directly addressing key limitations in current methods.