Authors: A.I. Kopytov, Yu.A. Masaev, V.Yu. Masaev

Title of the article: Improvement of geotechnology for preparation and mining of mining blocks of ore deposits using explosive and ompensating wells

Year: 2022, Issue: 6, Pages: 75-83

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)s

Index UDK: 622.831; 622.2; 622.236

DOI: 10.26730/1999-4125-2022-6-75-83

Abstract: The development of the iron ore industry is associated with the technique and technology of drilling and blasting operations, which remain the non-alternative basis for rock destruction. The development of iron ore deposits is carried out in difficult mining and geological conditions at great depths with increased seismic and shock hazard, in conditions of high tectonic stresses and massif disturbance. Ore bodies are represented by magnetite with an admixture of quartz, chlorite, calcite, syenite, diorite, skarn, porphyrite and other host rocks, practically isotropic, capable to destruction due to the elastic energy stored in the material itself and about 90% are shock hazardous. Despite the complexity of mining-geological and geomechanical conditions, significant progress in the technology of drilling and blasting operations in the underground development of ore deposits was achieved with the introduction of stripping by bundles of parallel-conjugated borehole charges and a system of continuous induced block caving with vibration release, which is still used in the development of iron ore deposits in Gornaya Shoria. The article presents the results of the implementation of the system of development of continuous induced block caving by the bundles of parallel-conjugate wells and studies the effect of compensation wells on improving the efficiency of preparatory and trenching workings, allowing to increase the technical and economic performance in the preparation and development of the cleaning blocks, as well as to ensure high operational safety.

Key words: mining operations mass explosion compensating thickness camouflage explosion shock wave development workings temporary workings

Receiving date: 01.11.2022

Approval date: 16.12.2022

Publication date: 27.12.2022

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