抚顺煤田断裂活化与地质灾害衍生关系

Relationship between fault reactivation and derivative geologic disasters in Fushun coalfield

为了查明抚顺煤田断裂活化效应产生的真正原因,分析了区域构造空间展布特征—东西向构造和北东60°方向的华夏式构造。通过形变测量资料、地面变形监测资料、电子自选共振测年资料、历史地震统计资料的分析,讨论了断裂构造的时间活动特征,并据此认为断裂活化效应主要是由于大量的人类采煤活动造成的,而非区域构造应力场长期活动的结果。断裂活化效应的存在破坏了抚顺煤田及其周围区域原始构造应力场的平衡状态,为达到新的平衡必然导致应力的重新集中与释放,在此过程中伴随产生了抚顺煤田广泛发育的滑坡、地面沉降、矿震、地裂缝等地质灾害类型,成为各类地质灾害产生的主要原因之一。

In order to identify real reasons for the fault of Fushun coalfield the feature of the regional structure space distribution east-west striking and north 60°east striking structure system is analyzed. Through the analysis of the deformation measurement data, ground deformation monitoring data and electronic information-on-demand resonance dating, historical earthquake data and discussion of fault time characteristics, the major reason is a large number of mining activities, not a long-term regional tectonic activity. Fault activation spoils original tectonic stress field in and around Fushun coalfield and leads to stress concentration and release again, then gives rise to extensive landslides, ground subsidence, rock bursts and ground fissures ,therefore it is considered to be one of the most important factors of geologic disasters.