中文摘要：

岩体工程失稳形式的判定是近年来岩石工程界关心的一个重要问题。在总结前人研究的基础上，根据能量耗散原理、突变理论，提出了岩体工程灾变失稳的塑性能突变判据，并应用于金川二矿水平矿层的稳定性判定，结合水平矿层的现场工程地质调查和声波探测结果，得出结论：水平矿层现已遭受新的破坏，处于峰值强度后的破裂状态，水平矿层在开采过程中不会发生突然性的灾变失稳。

英文摘要：

The decision of the form of rockmass engineering instability has been an important issue in the rock engineering field. Based on the summary of the previous studies, the energy dissipation principle and the catastrophe theory, the criteria for the plastic energy catastrophe of rockmass engineering instability were proposed and applied in judging the stability of the horizontal ore stratum in Jinchuan No. 2 Mine. Based on the site engineering geological survey and acoustic detection of the horizontal ore stratum, it is concluded that the ore stratum was newly destroyed and is in the post-peak region, and no abrupt collapse will occur in its mining process.