The Supporting Scheme Improvement and Surrounding Rock Unstable Circle Test of the Roadway under the Conditions of Soft Rock in Deep Coal

摘要

Using the supporting theory of Surrounding Rock unstable circle, before supporting design, BA-II unstable circle tester of surrounding rock is used to test the unstable circle of the new excavated 20m soft rock roadway of +588m level main roadway. Analysis of the test result concludes that the unstable circle of soft rock roadway range from 1.06 to 1.70m. According to the test result, the roadway supporting scheme is improved, and provides technical reference for the soft rock roadway supporting design under similar engineering geology conditions.