To grasp the scope of loose circle in deep roadway, and the variation regularity of rockg 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 applicatio...
