CHINA MINE ENGINEERING

With the deep mining of a certain gold mine, large deformation of roadway surrounding rock occurred, causing the fracture and caving of the roadway roof and the flaky and platy peeling of the two roadsides, showing a large area of support failure. In view of this phenomenon, support optimization design was carried out for the fractured roadway surrounding rock based on the loose circle theory. By measuring the surrounding rock loose circle, the loosening range is confirmed to be 1.5~2.0m. The supporting scheme of rock bolt+short anchor cable+metal mesh was adopted. Through engineering practice, the effect of roadway convergence and rock bolt stress is good, which can provide reference for mines with similar conditions.