Abstract: The deficiencies of structural parameter design method based on ellipsoid arrangement theory were discussed and analyzed， involving whether the theory follows the consistence principle between the drawn-out ore body and the blasting ore body or not， whether the equivalence from drawn-out ore body tangent optimum principle to the draw off body of pure ore tangent optimum principle is reasonable， whether the viewpoint that the drawn-out ore body intersection results in ore dilution is scientific or not， and the rationality of the calculation formula of high sublevel structure. Three groups of physical drawing experiments with different structural parameters were designed and carried out. The experimental results showed that the ore recovery rate of large spacing structure parameter scheme is the lowest due to the drawn-out ore body and the blasting ore body seriously inconsistent. Both theoretical analysis and physical experiments showed that the design method of structural parameters of stope based on ellipsoid arrangement theory is unreasonable and needs to be further improved.

Key words: ellipsoid arrangement theory, sublevel caving, structure parameter design, large spacing structure, ore-drawing experiment