Abstract
This study aims to establish a criterion for rock burst based on clay mineral content (CMC). A classification system for rock burst intensity is proposed based on the results of 124 laboratory tests. A CMC-based criterion for the probability and intensity of a rock burst is subsequently developed through a statistical analysis of the experimental results. Rock burst in laboratory tests can be classified as not occurring, weak, moderate, or strong according to sound, associated phenomena, fragment shape, and failure modes. When the CMC ≤ 10%, the probability of a rock burst is high, and the rock burst intensity is from moderate to strong. If 10% 30%, the probability of a rock burst is low. This rock burst criterion is used to evaluate the probability of rock burst at the Yaoqiao and Kongzhuang coal mines, China to demonstrate the feasibility of this criterion.
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