Fault reactivation related geological disasters such as mine seismicity, ground subsidence, water inrush and gas outburst seriously affect mine production and miner’s safety, developing a practical analytical method for the risk assessment of mining-induced fault reactivation is of great significance for underground mining safety. In this study a 2-D systematic procedure for a rapid tendency analysis of mining-induced fault reactivation is developed. It is an analytical procedure developed on the basis of the mining-induced differential stress and of the relationship between the differential stress and the corresponding critical reactivation angles, in this work we proposed to use the following three conditions to assess the tendency of mining-induced fault reactivation: (1) whether the fault angle closes to the optimum angle of reactivation; (2) whether the mining-induced differential stress reached the minimum triggering differential stress required for fault reactivation; (3) if the second condition is satisfied then evaluating whether the fault angle is within the range of the two corresponding critical reactivation angles. The assessment procedure proposed in this study is practical and it can provide a significant reference for mining engineers to better understand the mining-induced fault reactivation and to better assess the risk of fault reactivation related geological disasters.

中文翻译：

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基于二维差分应力的矿山诱发断层再活化趋势分析

与矿山地震活动性，地面沉降，突水和瓦斯突出等断层复活有关的地质灾害严重影响矿山生产和矿工的安全，开发一种实用的分析方法来进行矿山诱发的断层复活风险评估对地下采矿安全具有重要意义。在这项研究中，开发了一种二维系统程序，用于快速分析矿山诱发的断层再激活趋势。这是一种基于采矿引起的差异应力以及差异应力与相应的临界再激活角度之间的关系而开发的分析程序，在这项工作中，我们建议使用以下三个条件来评估采矿引起的差异。故障复活：（1）断层角是否接近最佳复活角；（2）开采引起的压差是否达到断层复活所需的最小触发压差；（3）如果满足第二条件，则评估故障角是否在两个相应的临界再激活角的范围内。本研究提出的评估程序是实用的，它可以为采矿工程师更好地理解采矿诱发的断层再活化和更好地评估断层再活化相关地质灾害的风险提供重要参考。