Stabilization Control Techniques for a Roadway in Deep High-Stress Soft Surrounding Rock

摘要

In order to solve the instability of roadways in deep high-stress soft rock, this paper proposed four supporting schemes for controlling the deformation of surrounding rock by using the horizontal roadway of -980m level refrigeration underground chamber in Xinhe Mining. Grouting and full section anchoring support, grouting and enclosed U36 steel support, grouting + enclosed U36 steel and full section anchoring support, and grouting + enclosed U36 steel + full section anchoring + masonry lining are proposed to control the deformation of surrounding rock according to the specific conditions of the mine. In view of the field engineering geological analysis, combined with laboratory tests, field monitoring, theoretical analysis and numerical simulation, the mechanism of deformation instability and supporting measures were studied. The numerical simulation results show that the grouting and enclosed U36 steel + full section anchoring support is more ideal, and achieved good economic and technical results.