Abstract: To grasp the scope of loose circle in deep roadway，and the variation regularity of rock's broken degree，on-site sonic wave tests on 950m deep roadway in Yunnan Huize Pb-Zn mine were made.The test results showed that ores with different lithologies has different acoustic properties，and the rock acoustic characteristics varied in the same trend within the range of loose circle.Compared with the upper part，the range of loose circle increased significantly.Among roadway surrounding rocks with seven different lithologies，10 test holes were laid out to make acoustic survey with the application of single hole method.Then the test results were fitted with to obtain a mathematical expression for the variation regularity of acoustic velocity within the range of loose circle in deep mine.The research provides a reliable reference for the research of acoustic characteristics of deep rock.

Key words: Deep roadway, Surrounding rock, Acoustic test, Loose circle