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Vol 152
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Analytical calculation and testing of anchor support at Soligorsk mines

Yu. G. Sirenko1
D. V. Pogrebenko2
About authors
  • 1 — Associate Professor G.V. Plekhanov Saint Petersburg State Mining Institute
  • 2 — Research assistant G.V. Plekhanov Saint Petersburg State Mining Institute
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The anchoring system used in the Soligorsk mines of the Starobinsky potash salt deposit and a new anchoring method using a variable-diameter borehole have been tested in various mining and geological conditions. Intense tangential stresses perpendicular to the anchor axis cause displacement of the rock layers; the backlash produced by drilling a variable diameter borehole will allow the rock layers to move horizontally without breaking the anchor rod. Thus, the service life of the anchoring is planned to be doubled. In order to reduce the cost of anchoring of mine workings with screw anchors it is proposed to reduce the length of anchors from 1.8 to 1.5 meters. At the same time, threading is not performed along the entire length of the rod, but only for the length of its anchoring in stable rocks (0.43 m). The possibility of using the new method of anchoring with the proposed parameters is confirmed by analytical calculations.

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