Institute of Mining, Geology and Geotechnology of the Siberian Federal University, Krasnoyarsk, Russia:

Vokhmin S. A., Head of a Chair, Professor, Candidate of Engineering Sciences

Trebush Yu. P., Associate Professor, e-mail: trebush@yandex.ru

Kurchin G. S., Associate Professor, Candidate of Engineering Sciences

This article considers the formation and calculation of losses and dilution of mineral resources in relation to the underground mining processing of non-metallic deposits of construction materials.

It is noted that the production of enterprises of construction materials is regulated by the maximum permissible content of useful and harmful components. In this case, there may be the undermining value of deads by the geological contacts, which provides a minimum limit on the content of useful component in the final product, and a maximum limit on the content of harmful components. Thereby, the maximum of profit is reached from 1 tonne of canceled balance reserves. According to this, the losses of minerals in a massif with an excavation of reserves on the geological contacts, are defined by the processing contour with a maximum allowed undermining of deads.

There is proposed an optimal content rate, of respectively useful or harmful components in the final product, which is defined by the contents of this component in the balance reserves in deads, and the permissible content of the component in the final product. This rate characterizes the ratio of undermining area of deads to the cross-sectional area of mine working. Usage of this index allows to calculate the losses in massif and dilution of mineral resources through the involvement of deads in extraction, according to the optimum position of the contour of reserves development.

This paper gives an example of calculation of losses and dilution of mineral resources by the cross and one-piece development systems. There are indicated the locations, sources and formation stages of exploitation losses and dilution. The sequence of extraction degrees is given along with the formulas for calculation of losses and dilution of mineral resources for the cross and one-piece development systems.

This article is published in a discussion order.

1. Tekhniko-ekonomicheskaya otsenka izvlecheniya poleznykh iskopaemykh iz nedr (The technical and economic estimation of minerals extraction from the subsoils). Under the general editorship of M. I. Agoshkov. Moscow : Nedra, 1974, 312 p.

2. Vremennye metodicheskie rekomendatsii po podgotovke i rassmotreniyu materialov, svyazannykh s raschetom normativov poter tverdykh poleznykh iskopaemykh pri dobyche, tekhnologicheski svyazannykh s prinyatoy sistemoy i tekhnologiey razrabotki mestorozhdeniy i poryadkom utochneniya normativov pri podgotovke godovykh planov razvitiya gornykh rabot. Rasporyazhenie Ministerstva Prirodnykh Resursov Rossiyskoy Federatsii ot 05.02.2003. No. 42-r (Temporary methodological recommendations for preparation and consideration of materials, which are connected with the calculation of loss standards of solid minerals during the extraction, technologically connected with the accepted system and deposits development technology, along with the specification order of standards by preparation of annual plans for development of mining works. Order of Ministry of Natural Resources of Russian Federation from 05.02.2003. No. 42-r).

3. Vokhmin S. A., Trebush Yu. P., Ermolaev V. L., Malinovskiy E. G., Kurchin G. S. Metodicheskiy podkhod k opredeleniyu normativnykh velichin pokazateley izvlecheniya nerudnogo syrya (Methodological approach to the standard sizes definition of extraction degrees of nonmetallic raw materials). Marksheyderiya i nedropolzovanie — Mine surveying and subsurface use, 2009, No. 6.

4. Vokhmin S. A., Zagirov N. Kh., Kurchin G. S., Trebush Yu. P. Raschet pokazateley izvlecheniya pri otrabotke prikontaktnykh zon mestorozhdeniy nerudnogo syrya (Calculation of extraction degrees during the processing of near contact zones of nonmetallic raw material deposits). Marksheyderiya i nedropolzovanie — Mine surveying and subsurface use, 2010, No. 2.

5. Vokhmin S. A., Zagirov N. Kh., Trebush Yu. P., Kurchin G. S. Metodicheskie osnovy normirovaniya pokazateley izvlecheniya iz nedr pri otrabotke rudnykh i nerudnykh mestorozhdeniy podzemnym sposobom (Methodological basis of fixing the extraction degrees from the subsoils during the processing of ore and nonmetallic deposits by underground method). Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta imeni G. I. Nosova — Bulletin of Magnitogorsk State Technical University named by G. I. Nosov, 2010, No. 2.

6. Reglament tekhnologicheskikh i proizvodstvennykh protsessov po primeneniyu kamerno-stolbovoy sistemy razrabotki s lentochnymi mezhdukamernymi tselikami i ispolzovaniem samokhodnogo oborudovaniya na rudnike «Izvestnyakov» (Regulations of technological and industrial processes on application of the chamber-pillar development system with the belt rib pillars and using the mobile equipment on “Izvestnyakov” mine). «Norilsk Nickel» Mining and Metallurgical Complex. Norilsk, 2006, 30 p.

7. Vokhmin S. A., Trebush Yu. P., Ermolaev V. L. Planirovanie pokazateley izvlecheniya pri podzemnoy razrabotke mestorozhdeniy poleznykh iskopaemykh (Planning of extraction indices by underground mining of mineral deposits). Krasnoyarsk : State Academy of Non-ferrous Metals, 2002.