Validation of Rational Backfill Technology for Sekisovskoe Deposit
L. A. KRUPNIK1, M. ZH. BITIMBAEV2, S. N. SHAPOSHNIK3, YU. N. SHAPOSHNIK4, V. F. DEMIN5
1Satpaev Kazakh National Technical University, ul. Satpaeva 22a, Almaty, 050013 Kazakhstan 2Data Invest LTD, ul. Shevchenko 157, Almaty, 050000 Kazakhstan 3East Kazakhstan State Technical University after Serikbaev, ul. Protozanova 69, Ust-Kamenogorsk, 070004 Kazakhstan 4Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia 5Karaganda State Technical University, Blv. Mira 56, Karaganda, 100027 Kazakhstan
Keywords: backfilling, backfill, backlfill preparation and feed flowsheets, backfill strength
Abstract
The article gives geological characteristic of ore and enclosing rocks at Sekisovskoe gold deposit. The underground mining involves room-and-pillar and sublevel caving for medium thick ore bodies and shrinkage stoping for thin ore bodies. The use of the solidifying backfill technology is validated. Based on the laboratory research into rheological and strength properties of backfill mixtures, rational backfill compositions are proposed for the said deposit. The technical and economic estimation of backfilling scenarios in Sekisovsky Mine is made for: 1) preparation of backfill in a mixer-activator and gravity flow in pipeline; 2) backfill preparation in a concrete mixer and feed in mine via vertical holes and horizontal mine mixers. Efficient flowsheet is developed for backfill feed from the surface backfill plants. Selection of the rational backfill technology for Sekisovskoe deposit is described.
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