一、前言为了探明岗南水库老溢洪道的地质情况,了解是否存在软弱夹层或其他地质构造,研究其地基的稳定性,1983年秋冬在老溢洪道附近开挖探井两处。因缺少大孔径钻机,所以采用人工打眼爆破方式。爆破振 I. Preface In order to ascertain the geological conditions of the old spillway in Gangnan Reservoir, understand the existence of weak intercalations or other geological formations and study the stability of its foundations, excavate two exploration wells near the old spillway in autumn and winter of 1983. Due to the lack of large-diameter drilling rig, so the use of artificial eye-blasting method. Blast vibration