中文摘要：

采用实地调查和数理统计的方法对采动地裂缝进行分类,并分析不同类型地裂缝的主要成因。针对铁法矿区巨厚火成岩覆岩采动诱发的地裂缝问题,采用平衡拱-梁理论建立了火成岩体断裂破坏的力学模型,利用FLAC3D数值软件模拟计算了巨厚火成岩覆岩采动过程中应力分布规律和地表裂缝发育的机理。

英文摘要：

The method of field investigation and mathematical statistics is adopted to classify mining ground fissures,and analyze the causes of different types of ground fissures.To address the problem of ground crack induced by the mining of the extremely thick igneous rock strata in Tiefa mining area,the balancing arch- beam theory is used to establish the mechanics model of igneous rock body fracture damage.The stress distribution rule in the process of mining of thick of igneous rock strata and the mechanism of the surface crack growth is simulated and calculated by using softwane FLAC3 D numerical software.