中文摘要：

在地下煤炭资源开采过程中,采动岩体失稳破坏往往会造成严重的工程问题,因此掌握岩石破坏失稳机理及其临界信息特征已成为岩石力学领域的一个重要研究方向。以邯郸矿区亨健煤矿2507工作面采矿地质条件为基础,对中深部煤层开采条件下的氡气浓度变化与地表采动裂缝发育状况之间的相关性进行了初步探索。现场探测试验结果表明,根据氡气测量数据判断2507工作面初次来压步距为45 m左右,周期来压平均步距为15 m左右,与井下工作面矿压观测结果基本吻合,与工作面地表的变形裂缝形成一一对应关系,进一步证明了氡气探测在中深部煤层开采条件下应用的可行性。在此基础上,提出了氡气异常系数（k）的概念,确定了预测2507工作面覆岩层中基本顶发生破断的临界氡气异常系数值k≥15%。最后,从综合探测方法、氡气析出影响因素、裂隙岩体中氡气运移机理及氡气探测误差平差等方面指出了后续研究的方向。

英文摘要：

Due to severe problems caused by rock mass failure in the underground coal mining, the mechanism and critical conditions of rock mass failure have attracted attentions from the field of rock mechanics. Based on the mining and geological conditions of 2507# working face in Hengjian coal mine, Handan mining field, the correlation between radon concentration changes and mining-induced surface cracks evolution has been preliminarily studied under the conditions of mid-deep coal seam mining. The field test results show that the first weighting interval of 2507# working face is about 45 m and periodic weighting average interval is about 15 m according to the radon measurement data. The results are basically agree with the underground mine pressure observation results and have a corresponding relation with the surface deformation cracks, which has further validated the feasibility of radon detection ap- plication under the conditions of mid-deep coal seam mining. Based on those, the concept of anomaly coefficient of radon （k） has been put forward, and the critical value k （no less than 15%） has been de- termined for predicting the breakage of main roof in overburden of 2507# working face. Finally, pros- pects of radon detection had been proposed, such as the comprehensive detection methods, factors af- fecting radon exhalation, migration mechanism fissured rock mass and error adjustment of radon detec- tion.