Cyclic loading damage in uranium mining is often accompanied by changes in radon exhalation characteristics. Understanding the relationship between rock damage and radon exhalation of uranium ore is therefore important for predicting rock instability and improving monitoring methods to ensure the safety of uranium mines and other underground projects. In this study, we performed constant amplitude cyclic loading and unloading tests on quasi-uranium ore to measure the degree of damage and used the closed chamber method to measure the accumulated radon concentration. The results show a range of damage values between 0.089 and 0.315. The sample with the highest damage value also showed the highest radon exhalation rate of 0.0411 ± 0.00384 Bq m− 2 s− 1. We use the dissipated energy as a damage variable and find a positive correlation between damage and radon exhalation rate. The damage value was fitted with radon exhalation rates, yielding correlation coefficients of 0.97, and shows an inverted S-shaped trend. The results provide a basis for monitoring rock stability using radon exhalation in future uranium mining operations.

中文翻译：

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等幅循环加卸载准铀矿损伤演化及氡析出特性试验研究

铀矿开采中的循环载荷损伤往往伴随着氡呼出特性的变化。因此，了解岩石破坏与铀矿氡喷出之间的关系对于预测岩石失稳和改进监测方法以确保铀矿和其他地下项目的安全具有重要意义。在这项研究中，我们对准铀矿进行了恒幅循环加载和卸载试验，以测量损坏程度，并使用密闭室法测量累积的氡浓度。结果显示的损坏值范围在 0.089 和 0.315 之间。具有最高损伤值的样品还显示出最高的氡呼出速率为 0.0411 ± 0.00384 Bq m− 2 s− 1。我们将耗散的能量用作损伤变量，并发现损伤与氡气呼出率之间存在正相关关系。损伤值与氡气呼出率拟合，相关系数为 0.97，呈倒 S 形趋势。该结果为在未来的铀矿开采作业中使用氡呼出监测岩石稳定性提供了基础。