Abstract:
In order to ensure the safety and stability of main shaft skip loading chamber and to evaluate its rational design and construction of supporting structure, we use FLAC
3D numerical simulation software and field monitor to study the deformation and force laws of surrounding rock and arching supporting structure of Hongqinghe Mine main shaft skip loading chamber. The result showed that the horizontal pressure distribution was uneven; the pressure of both sides gable of skip loading chamber was less than the rest. The numerical simulation shows that normal stress extreme value reaches to 4.13 MPa, though tangential stress extreme value reaches to 1.77 MPa. The field monitor shows that the largest rebar stress value amount is 72.0 MPa, which is far less than the steel design intensity value occurred in inner row rebar of head-arc wall near the lower part of chamber. The monitor data show that the skip loading chamber is safe and stable, and the design and construction of arching supporting structure is reasonable and effective.