High-Stress Chamber Stability in Kilometer-Deep Coal Mines: A Case Study

Controlling the surrounding rock of coal mine roadways or chambers becomes more difficult as mining depth increases. The stability of the underground chamber complex, as an transportation hub and power center, is one of the main focuses of coal mine development. The case study is raised to control the surrounding rock of deep buried chamber complex. The examine become finished at the 2nd extraction phase in a deep coal mine, and the pillar stability turned into analyzed. The narrow pillar allows for a high diploma of stress superposition all through excavation of adjacent chambers. Based on the stress state of deep chambers, the “Yielding rock bolt—Grouting anchor cable and Concrete spraying layer” support scheme became proposed. The field application consequences show that the displacement of the pump room is 60 mm, which is within the acceptable range. The Support Vector Machine was used to evaluate the stability of the chamber and showed good result. The technique can be applied to the excavation and support of high stress chamber station in coal mines.