Institute of Mining of the Ural Branch of the Russian Academy of Sciences:

V. P. Draskov, Senior Researcher, e-mail: draskov_vp@mail.ru

OJSC “Donskoy GOK”:

M. M. Bekeev, Technical Director

Investigated problem of developing of the Saranovsky chromite deposit due to loss of minerals that persist throughout the period of underground mining in the range from 23 to 28.5%. The high level of loss of minerals does not satisfy the subsoil user or authorities of nature protection. Mine management has set a target to reduce the loss of ore to the average of modern mining. The main share in the losses of the mineral accounts for the volume of untreated ore reserves, which are concentrated in the ore pillars. The ore pillar left to save in the steady state sequence and pedigree earn the Earth’s surface and solve problems for the protection from harmful effects of deformation displacement at undermining buildings and structures located within the field. Elimination of mineral losses in the pillars occurs as a result of the transition from traditional methods of field development to working off the ore reserves of the lower levels without pillars. New technology of development at the lower levels associated with solution of issues and problems of displacement and buildings protection on the territory of odd jobs. Reviewed geomechanical situation of the displacement process and rock pressure in the traditional technology of deposit development. Investigated possible changes in patterns of displacement in terms of technology of continuous deposit development. The continuous development of the remaining of deposit reserves does not violate the terms of safety of protected sites. The application of the new technology reducing ore losses on the Main Saranovsky chromite deposit is proved.

1. Sashurin A. D. Sdvijenie gornyh porod na rudnikah chernoy metallurgii (Strata movement on ferrous metallurgy mines). Ekaterinburg, 1999, pp. 53–88.

2. Draskov V. P. GIAB — Mining Informational-Analytical Bulletin, 2010, No. 6, pp. 309-316.