Calculation of anchor - steel beam structure support for adit at Vi Kem mine

Tóm tắt

When supporting the adit with a trapezoidal steel frame was applied at Vi Kem mine, the results showed that the rock mass was slightly compressed and moved on the steel frame at the adit crown. The rock mass on both sides of the adit had almost no displacement. Therefore, the anchor-steel beam structure was proposed to replace the trapezoidal steel frame structure. This structure replaces the trapezoidal steel support frame when the adit sides are stable to reduce the costs of materials and support labor, while helping to increase the speed of adit excavation. The subject of application is the adit along the seam and through the seam at Vi Kem mine. First, the paper classifies the rock mass, calculates the pressure acting on the adit crown according to Protodiakonov, and analyzes the wedge formed on the adit crown using numerical methods. Next, the calculation is made for the new anchor-steel beam structure suitable for the pressure at the adit crown. The construction results show the effectiveness of this new anchor-steel beam structure.