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Reconciliation: Balancing the Planned with the Actuals

Accurate reconciliation is vital to managing costs and revenue projections, allowing mining companies to make informed decisions about budgeting, pricing, and profitability.

Mining operations, whether conducted in open pit or underground environments, involve extracting valuable resources from the Earth. Reconciliation is the art and science of balancing what is planned, what is mined, and what is actually recovered. Reconciliation reports form the basis of a mine knowing how well they are doing vis-a-vis what was planned to be done. It adheres to the ‘you can’t improve what you don’t measure’ paradigm. The results of the reconciliation reports are used to improve the workings of the mines by strengthening the operational plans at both the planning and operational stages.

Reconciliation in mining serves as a vital bridge connecting the theoretical (planned) and on-field (actual) aspects of mining. It addresses the differences between the projected reserves, scheduled production targets, and the actual production and recovery achieved during mining operations. These differences can be attributed to various factors such as geological variability, equipment performance, and operational challenges.

RECONCILIATION HELPS MINING COMPANIES TO:

1. OPTIMIZE RESOURCE UTILIZATION: By comparing scheduled production targets with actual production, mining operations can identify areas of performance improvement. This insight allows for better resource allocation, leading to improved efficiency.
2. ENHANCE GEOLOGICAL UNDERSTANDING: Geology plays a crucial role in mining operations. Reconciliation provides valuable feedback on the accuracy of geological models, helping geologists refine their understanding of ore bodies and mineral deposits.
3. IMPROVE FINANCIAL PERFORMANCE: Accurate reconciliation is vital to managing costs and revenue projections. It allows mining companies to make informed decisions about budgeting, pricing, and profitability.

THE FOLLOWING ARE KEY ASPECTS OF RECONCILIATION IN OPEN PIT MINING:

1. BENCHMARKING OF CURRENT OPERATIONS: The reconciliation process begins with the collection of multiple sources of data, which includes geological information, production records, equipment performance data, etc. Benchmarking involves comparing these actual production data against planned targets to establish benchmarks for future operational KPIs.
2. GEOSTATISTICAL ANALYSIS: Geostatistical techniques are often used to analyze geological data and assess the accuracy of resource models. Variograms, for example, can help quantify the spatial variability of ore grades.
3. MATERIAL MOVEMENT TRACKING: Open pit mining uses Fleet Management Systems to monitor the movement of trucks, shovels, and other equipment. Reconciliation methods are used to track and compare these movements against the planned movements as scheduled.
4. BLAST DESIGN AND FRAGMENTATION ANALYSIS: Reconciliation includes evaluating the fragmentation of blasted material and its impact on downstream processes, such as crushing and milling. This allows changes to blast design, which is critical for efficient material extraction.
5. STOCKPILE MANAGEMENT: Stockpile reconciliation ensures that the quantity and quality of material in stockpiles match planned movements to the processing plants. Accurate stockpile assessments are essential for planning and processing.
6. GRADE CONTROL: Geologists use grade control to confirm the actual grades of material in the blast. This data is compared to the geological model to ensure alignment between the planned grades of exploration model vs the grade control model.
7. CONTINUOUS IMPROVEMENT: Mining operations continuously adapt and optimize their processes based on reconciliation results. This includes adjusting mining plans, equipment selection, and scheduling to maximize efficiency.

RECONCILIATION IN UNDERGROUND MINING PRESENTS UNIQUE CHALLENGES, INCLUDING LIMITED ACCESS AND VISIBILITY. HERE ARE SOME KEY ASPECTS OF RECONCILIATION IN UNDERGROUND MINING:

1. DRILLING AND BLASTING OPTIMIZATION TO REDUCE ORE LOSS: Underground drilling and blasting often leads to ore loss as compared to scheduled plans. Underground mining is susceptible to ore dilution, where waste rock is mined with ore during extraction. Reconciliation focuses on optimizing these processes to minimize ore loss and dilution.
2. STOPE MAPPING AND SURVEYING: Accurate mapping and surveying of underground stopes are essential for understanding the geometry and volume of ore extracted. This is used to ensure a safe operation as well.
3. ORE HANDLING AND MOVEMENT: Underground mines use a different form of Fleet Management system to track ore movement from stopes to processing plants. This equipment includes LHDs, conveyors, skips, etc., which are tracked and monitored. Reconciliation allows mines to monitor the movements and equipment for increased efficiency and accuracy.
4. BACKFILL MANAGEMENT: For mines with weak geotechnical conditions, stopes are sometimes filled with backfill to support the geotechnical stability of the roof and sides. Reconciliation ensures that the right materials are used and properly placed.
5. GEOLOGICAL LOGGING AND SAMPLING: Geological logging and sampling of underground ore bodies helps confirm the accuracy of geological models and ore grade estimations. This allows for reconciling the long-term exploration model with the grade control model and improving the exploration models’ accuracy.

DESPITE ITS IMPORTANCE, RECONCILIATION IN MINING IS NOT WITHOUT ITS CHALLENGES. SOME COMMON CHALLENGES INCLUDE:

1. GEOLOGICAL UNCERTAINTY: Geological variability and uncertainty can lead to significant differences between planned and actual ore grades. Ongoing geological studies and improved sampling techniques help mitigate this challenge.
2. EQUIPMENT VARIABILITY: Equipment performance can vary significantly not just within crew but also due to weather, affecting the efficiency of mining operations. Regular maintenance is essential to minimize these variations.
3. DATA MANAGEMENT: Accurate data collection and management are critical for effective reconciliation. Implementing modern data management systems and technologies can streamline this process.
4. HUMAN ERROR: Human error, such as misreporting or data entry mistakes, can impact reconciliation accuracy. Comprehensive training, quality control measures, and automated validation of input data are essential to minimize such errors.

SourceOne® EKPS can help alleviate these challenges by using a combination of ontology and knowledge graphs to model the mine and its interactions. It starts by providing a structured and interconnected representation of mining-related knowledge. By creating a comprehensive ontology encompassing geological data, schedule data, mining processes, equipment performance, and other relevant factors, mining companies can establish a standardized data integration and analysis framework. This ontology serves as the foundation for constructing a knowledge graph that links various elements of mining operations together. By utilizing these technologies, mining professionals can gain a holistic view of their operations, enabling them to identify discrepancies more efficiently, trace their root causes, and implement targeted solutions. Moreover, ontology and knowledge graph-driven approaches can facilitate real-time monitoring and predictive analytics, empowering mining companies to proactively address reconciliation challenges, optimize resource utilization, and enhance overall operational efficiency by providing actionable insights.

CONCLUSION

Reconciliation ensures the alignment of mining plans, production targets, and actual results in mine operations. It acts as the compass that guides mining operations toward greater efficiency, sustainability, and profitability. It is a multifaceted process that involves data collection, geological analysis, equipment optimization, and continuous improvement. It optimizes resource utilization, enhances geological understanding, and improves financial performance. SourceOne, with its ontological base, acts as the central hub to model and address these improvements.