Surrounding Rock Loosing Circle Test Based on Acoustic Test Technology

By using single-hole ultrasonic testing method, we tested Huangling No.2 Mine gateway loose circle range; according to the test results, we classify gateway surrounding rock and determine that gateway loose circle range is 1.7 m, amend the original some anchoring support parameters; we summarize defects and reasonable suggestions and improvements of acoustic test method for single-hole. The results show that single-hole sonic test method can quickly and accurately test gateway loose circle range and provide effective and rational support parameters, which improves acoustic test method plugging effect for the wider use of acoustic test.