Analysis and Construction Techniques for a Water Seal for Underground Mines Subjected to Water Inrush
Analysis and Construction Techniques for a Water Seal for Underground Mines Subjected to Water Inrush
复制标题
井下矿井突水水封分析及施工技术
DOI：
10.1007/s10230-015-0359-z
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发表时间：
2016
影响因子：
2.8
通讯作者：
Liu Hong-liang
中科院分区：
文献类型：
--
作者：
Li Shu-cai;Xu Fei;Zhang Qian-qing;Li Li-ping;Wang Wei-ming;Liu Hong-liang
本文介绍了中国某煤矿深部高压突水的钢筋混凝土止水工程实例。使用FLAC3D开发的结构的三维数值模型提供了对水封结构周围岩石中的应力和位移分布以及塑性区范围的更好理解。模拟结果表明，水压力引起的总应力的80%左右作用在第一锥形塞的水侧，水压力引起的总应力的大小沿密封后腔室的轴向沿着逐渐减小。在此基础上，提出了全断面帷幕灌浆方案，以提高钢筋混凝土止水效果。为了评估拟议的灌浆方案，密封件后面的区域充满水，并监测围岩的稳定性。该注浆止水施工技术的有效性结论可为其他止水施工提供有价值的指导。
A case history is presented for a reinforced concrete water seal constructed to resist high-pressure water inflows in a deep coal mine in China. A 3-D numerical model of the structure, developed using FLAC3D, provided a better understanding of the distribution of stresses and displacements and the extent of plastic zones in the rock surrounding the water seal structure. The modeling showed that about 80% of the total stress caused by the water pressure acted on the water side of the first tapered plug and that the magnitude of the total stress caused by the water pressure gradually decreases along the axial direction of the chamber behind the seal. Based on the modeling, a full-face curtain grouting scheme was proposed to improve the effectiveness of the reinforced concrete water seal. To assess the proposed grouting scheme, an area behind the seal was filled with water and the stability of the surrounding rock was monitored. The conclusions regarding the effectiveness of the grouting and water seal construction techniques may provide valuable guidance for the construction of other water seals.