Study on the impact of debris flow from tailings dam failure on shale gas well station
Study on the impact of debris flow from tailings dam failure on shale gas well station
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DOI：
10.3389/feart.2023.1297133
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发表时间：
2023-12
影响因子：
2.9
通讯作者：
Meibao Chen;Jingxin Mao;Yang Li;Xiaofei Jing
中科院分区：
文献类型：
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作者：
Meibao Chen;Jingxin Mao;Yang Li;Xiaofei Jing
页岩气井站在页岩气的开采中起着至关重要的作用，其安全状况不仅对页岩气的生产有重要影响，而且对周围环境的生态平衡也有重要影响。为研究尾矿坝溃坝泥石流影响下页岩气井站的响应特征，采用物理建模与数值模拟相结合的方法进行综合分析。重点分析了页岩气井站尾矿库溃坝碎屑下游流动引起的动态淹没过程和冲击淤积规律。以淹没深度和淤积破坏程度作为表征的关键参数。试验结果表明，下游泥流淹没过程可分为快速增加（0 ~ 60 s）、稳定增加（60 ~ 106 s）和缓慢推进（106 ~ 250 s） 3个阶段。井站泥石流淤积高度变化呈先上升后下降后趋于稳定的趋势。A至D测点录得的最高淤积量分别为4.4、4、5.2和6 m。采用计算流体力学方法，在无保护条件下进行数值计算，计算结论与试验结果误差不超过15%。此外，还深入研究了8 m和16 m泥石流坝对泥石流的阻断作用。研究表明，挡沙坝坝高为16 m时截流效果最好，泥沙淤积高度最高为0.4 m。研究结果为泥石流灾害的防治提供了一定的参考。
The shale gas well station plays a critical role in the extraction of shale gas, and its safety status exerts significant influence not only on shale gas production but also on the ecological balance of the surrounding environment. To investigate the response characteristics of the shale gas well station under the impact of tailings dam failure debris flow, a comprehensive analysis was conducted using a combination of physical modeling and numerical simulation. The analysis focused on the dynamic inundation process and the impact siltation law caused by the downstream flow of tailings dam failure debris at the shale gas well station. The depth of inundation and the extent of siltation damage were employed as key parameters for characterization. Experimental findings revealed that the downstream mudflow inundation process could be divided into three distinct stages: rapid increase (0–60 s), steady increase (60–106 s), and slow advance (106–250 s). The pattern of mudflow siltation height variation at the well station exhibited an initial rise, followed by a subsequent decline and eventual stabilization. The highest siltation volumes recorded at measurement points A to D were 4.4, 4, 5.2, and 6 m, respectively. Additionally, by employing computational fluid dynamics, numerical calculations were performed under unprotected conditions, with the error between the calculated conclusions and the test results not exceeding 15%. Furthermore, the blocking effect of 8 and 16 m debris flow blocking dam on the debris flow was thoroughly investigated. The study demonstrated that the check dam with a height of 16 m yielded the most effective blockage, resulting in the highest sediment siltation height of 0.4 m. The research results provide some reference for the prevention and control of debris flow disasters.