废弃煤矿抽水蓄能电站技术相对于传统抽水蓄能电站具有显著优势。以陕西省榆林市神木市大柳塔废弃煤矿为背景,采用光滑粒子流体动力学(SPH)方法,将岩体离散化为不同力学特性的粒子单元,结合Drucker-Prager弹塑性模型和粒子断裂模型,动态模拟废弃煤矿抽水蓄能地下水库扩容开挖过程中围岩应力场演化及顶板破坏机制,明确岩体损伤对围岩稳定性的影响。结果表明:顶板破坏呈现阶段性发展特征,开挖至45 m时达到临界跨度,引发分层破坏和局部板状冒落,冒落带高度达19.6 m;岩体损伤对围岩稳定性具有显著影响,轻微损伤使临界跨度提前至35 m
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