大同二电厂扩建厂址工程区活动构造评价

大同盆地西侧北北东-北东向鹅毛口-口泉断裂, 属正平移性质, 晚第四纪以来断裂继续活动, 但北东、南西两段活动有明显差异。盆地东侧北东-北东东向六棱山北麓断裂, 亦属正断层性质, 至今仍在活动。距大同二电厂扩建厂址最近的水峪断裂, 晚更新世末3～1.5万年以来已停止活动, 对厂址稳定性不会有影响。

EVALUATION OF ACTIVE FAULT IN THE ENGINEERING SITE AREA FOR DATONG POWER PLANT 2

The egineering site area for Datong Power Plant 2 is located in Datong basin at the northern end of Shanxi fault depression zone. On the western side of the basin there is NNE NE trending Emokou Kouquan fault which has continued to be active since late Quaternary. On the eastern side of the basin there is NE NEE trending Liu Lingshan fault which is still active at present. Inside the basin there is a series of NEE NE trending secondary faults, some of which are still active at present. However, the Shuiyu fault, the nearest to the engineering site ,has been active since 30～15 thousand years ago, but it well not affect the stability of the site.