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Conference Proceedings

Underground Operators Conference Proceeding 2025

Conference Proceedings

Underground Operators Conference Proceeding 2025

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Considerations for paste fill inrush exclusion zones

Cemented Paste Backfill (CPB) has become integral to the mining cycle in many underground mines in Australia. However, there are inherent safety concerns associated with CPB, as it introduces the hazard of inrush into operational areas during backfill operations in the event of a paste wall failure. Typical operational controls to prevent the consequences of an unwanted inrush event involve the establishment of inrush exclusion zones. The mine design layout and sequence can have a significant impact on the implementation of these, which can cause interactions with other production activities, leading to disruptions if not scheduled and designed adequately. These issues are particularly prevalent in bulk stoping mines, where paste fill volumes and interactions on production levels are much higher compared to narrow vein mining. Exclusion zone design is undertaken using various methods, each with its own advantages and disadvantages. The selection of the appropriate methods can significantly impact the safety and efficiency of mining operations. This review assesses the typical methods used in Australian mines and outlines suitable approaches for different stope types, providing considerations for exclusion zones design to support safe and efficient operations.
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  • Published: 2025
  • Unique ID: P-04919-K8Q0D2

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