黄金科学技术 ›› 2020, Vol. 28 ›› Issue (1): 51-60.doi: 10.11872/j.issn.1005-2518.2020.01.121
孙琪皓1,2,3(),马凤山1,2(),赵海军1,2,郭捷1,2,曹家源1,2,3
Qihao SUN1,2,3(),Fengshan MA1,2(),Haijun ZHAO1,2,Jie GUO1,2,Jiayuan CAO1,2,3
摘要:
倾斜矿体开采引起的地表变形与断层活化问题给矿山工程带来重大隐患,如竖井破坏。为了研究倾斜矿体采动及断层活化作用下竖井的变形破坏规律,引入一种软材料小模型物理模拟方法,对不同倾斜角度矿体、不同倾角断层下的模型进行开挖试验。结果表明:该方法能够较好地模拟典型的工程地质现象;在试验工况下,矿体倾斜角度不同,则自重应力场中的竖井受到采动影响的程度不同;处于开挖区上方的隐伏断层,倾角极缓时具有一定屏蔽垂直位移的作用,缓倾断层活化对水平位移的影响和陡倾断层活化对于垂直位移的影响具有某些相似性和对称性;倾角越接近45°,断层活化作用越强烈,对地表起伏度的影响越大,且竖井更有可能产生上部沉降、底部拱起的现象。
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