Under a circular quarry we will understand a quarry, the contour of which at the end of mining is close to an elliptical cone. The research will be carried out in the natural Cartesian coordinate system, i.e. the plane hou is parallel to the plane of the horizon, axes oh and ohu are parallel to the axes of the quarry...

At many operating quarries non-metallic minerals are extracted only up to the level of underground water, and large reserves of raw materials lying below the aquifer level are considered off-balance sheet and are not developed. The depth of deposit development can be increased at the expense of watered reserves by using draglines, which provide excavation of blasted rock mass from under water from a great depth.