频繁矿震作用下地裂缝扩展机理及数值模拟研究

Ground fissure caused by frequent mine-quakes and its numerical simulation

频繁矿震诱发断层活化以及由此引起的地裂缝不仅对矿井生产构成威胁。同时对于城市安全、居民生活也构成严重危害。论文根据工程场地岩土体破裂的观点,以辽宁抚顺地裂缝为例,采用理论解析、数值模拟等手段,开展了矿震引发地裂缝扩展效应探讨。研究认为:地下开采对抚顺地区的地质环境造成了破坏,地表沉陷为地裂缝的发育提供了运移空间及应力条件。浑河断裂带为抚顺地区地裂缝发育提供了地质构造基础。频繁发生的矿震加剧了地表裂缝的扩展及破坏作用。

Frequent mine-quakes induce fauh activation. And fissures in ground caused by it pose threat to mining well, as well as city security and people＇s life. Based on the theory of rock destroying at engineering site, this paper takes Fushun ground fissures as an example to discuss extension effects of ground fissures caused by mine-quakes, using theoretical analysis and numerical simulation, etc. Conclusions from the research are as follows： exploiting under well destroys geological environment in Fushun district ; Hun River fault belt provides geological structure conditions for the development of ground fissures in Fushun while the earth＇ s surface sinking provides moving space and stress conditions. Frequent mine- quakes accelerate the extension of ground fissures and their destroying ef fect.