Abstract To address issues of security, efficiency and cost in mining operations, the concept of mining environment regeneration (MER) is proposed. Mining environment regeneration is defined as improving the orebody occurrence conditions via geotechnical engineering techniques and providing safe mining conditions for workers and equipment. Therefore, artificial reconstruction bodies such as preconditioned roofs and pillars play a significant role in stope stability. Given the initial stress states and blasting dynamic disturbances, an artificial reconstruction body numerical model is established using the explicit dynamic software ANSYS/LS-DYNA. An implicit and explicit conversion technique is used to investigate the dynamic response process of a preconditioned roof (PR) under a combined static and dynamic loading condition. The peak particle velocity (PPV), peak pressure and strain energy density (SED) of key points are selected as the technical analysis indicators, and the dynamic responses in the PR are obtained. An industrial experiment is performed in an underground mine based on the numerical results. By combining on-site blasting vibration-monitored data and numerical simulation results, we provide reasonable guidance in practical mining production.

中文翻译：

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地下矿井预处理顶板动力响应数值研究：以矿山环境再生为例

摘要 针对采矿作业中的安全、效率和成本问题，提出了采矿环境再生（MER）的概念。采矿环境再生定义为通过岩土工程技术改善矿体赋存条件，为工人和设备提供安全的采矿条件。因此，预处理的顶板和柱子等人工重建体对采场稳定性起着重要作用。给定初始应力状态和爆破动力扰动，利用显式动力学软件ANSYS/LS-DYNA建立人工重建体数值模型。隐式和显式转换技术用于研究预调节屋顶 (PR) 在静态和动态加载条件下的动态响应过程。选取关键点的峰值粒子速度（PPV）、峰值压力和应变能密度（SED）作为技术分析指标，得到PR中的动态响应。根据数值结果在地下矿井中进行了工业试验。结合现场爆破振动监测数据和数值模拟结果，为实际矿山生产提供合理指导。