For over 40 years, Mufulira underground copper mine has been recording incidents of rockburst. Laboratory tests and numerical analyses were carried out to understand the rockburst mechanism at the Mufulira mine. Rockburst did not occur in the chain pillars or at the mining face, but mainly in the mining drives along diminishing pillars or ahead of the mining face. RQD suggested that the rock mass in the rockburst areas was relatively intact. Laboratory tests confirmed that the rock at Mufulira mine is very strong and brittle. Elastic stress analyses for the rockburst sites by 3D displacement discontinuity method (DDM) indicated very high stress in the chain pillars and low-stress concentration at the sites of rockburst during the initial mining stages. However, there was no apparent positive correlation between the elastically calculated normal stress values and the occurrences of rockbursts. The 2D elastic FEM analysis was conducted under the concentrated stress by DDM and indicated that some stress increase with face advance for the rockburst in the vicinity of the mining face. However, stress severity indicated almost no increase, and the rockbursts cannot be explained as an instantaneous rock mass failure due to stress increase by mining. Therefore, a creep damage model was proposed to clarify the mechanism of the rockbursts. Cumulative rock damage was evaluated for the edge elements of each sidewall of the mining drives, based on the normal stresses by 3D DDM. The rockburst occurrences were well hindcasted. A method to estimate the volume of the rockburst source was proposed, and a likely result was obtained.

40 多年来，Mufulira 地下铜矿一直在记录岩爆事件。进行了实验室测试和数值分析，以了解 Mufulira 矿的岩爆机制。岩爆没有发生在链柱或采矿工作面，但主要发生在沿渐缩支柱或采矿工作面前方的采矿驱动器中。RQD 表明岩爆区的岩体相对完整。实验室测试证实，Mufulira 矿的岩石非常坚固且易碎。通过 3D 位移不连续法 (DDM) 对岩爆地点的弹性应力分析表明，在初始采矿阶段，链柱中的应力非常高，而岩爆地点的应力集中度很低。然而，弹性计算的法向应力值与岩爆发生之间没有明显的正相关关系。二维弹性有限元分析通过DDM在集中应力下进行，表明在工作面附近的岩爆，应力随着工作面推进而增加。然而，应力严重程度几乎没有增加，并且岩爆不能解释为由于采矿应力增加导致的瞬时岩体破坏。因此，提出了蠕变损伤模型来阐明岩爆的机理。基于 3D DDM 的法向应力，评估了采矿驱动器每个侧壁的边缘元素的累积岩石损坏。岩爆事件得到了很好的事后预测。提出了一种估算岩爆源体积的方法，