Gold Rush Practice Exam

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What is the purpose of a grade control plan in mining operations?

To document environmental liabilities after closure.

To predict future ore prices.

To train personnel in sampling methods.

To monitor ore grade entering the plant and adjust mining, blasting, and processing to maintain target recoveries.

Grade control focuses on using ore quality data to steer how the mine produces for processing. By measuring the grade of ore as it is mined and enters the plant, then comparing that data to the plant’s feed targets, the operation can adjust where and how mining and blasting occur and how the plant processes material. The goal is to keep the feed at the desired grade and distribution, which helps maximize metal recovery and keep operations stable. That’s why the best choice is: monitor the ore grade entering the plant and adjust mining, blasting, and processing to maintain target recoveries. The other options relate to environmental liabilities, market forecasting, or training—areas that aren’t the primary purpose of a grade control plan.