What does bump refer to in a mining context?

In the context of mining, "bump" specifically refers to the phenomenon where coal or rock bursts due to excessive pressure on the mine roof and ribs. This occurs when there is a sudden release of built-up stress, often resulting from geological conditions or the weight of overlying materials. This phenomenon can pose serious risks to mine safety because it may lead to collapses or injuries if proper precautions are not taken.

Understanding this term is crucial for underground mine foremen as it highlights the importance of monitoring stress levels and implementing reinforcement strategies within mines to safeguard against potential accidents. Recognizing geological indicators that may signal a risk of bumping is essential for effective mine management and ensuring the safety of workers.