分析了小湾水电站高边坡的地质结构特征，结合施工进行了爆破试验、爆破振动监测、爆破前后岩体声波波速对比测试和边坡岩体宏观调查。通过对爆破试验的各项测试结果进行分析，对比类似工程的经验，提出了小湾水电站高边坡开挖的爆破安全判据为：微风化岩体的震速为15～20 cm/s，弱风化岩体10～15 cm/s，强风化岩体10 cm/s，以上一个马道坡脚位置作为控制点，并确定了使用原则。其试验成果在施工爆破中得到了验证。

The geological structure character was analyzed about high slope on Xiaowan Hydropower Station. Blasting test in construction field , vibration monitoring, contrast tests of wave velocity before and after blasting, and macro-survey for the Xiaowan Hydropower Station were performed. Compared with similar engineering experiences, the blasting safety controlled standard of wave velocity inside rock for Xiaowan Hydropower Station is as follows: for minutely weathered rock, v=15-20 cm/s; for weakly weathered rock, v =10-15 cm/s; for strong weathered rock, v =10 cm/s. The test results were verified in construction site and considered to be rational.