ASSESSMENT OF PIT WALL AND PIT BOTTOM RESERVES WORKING OPTIONS IN THE MINE «OLENIY RUCHEY»

• Main Authors: Natalya A. Nemova, Tatyana A. Belsh
• Format: Article
• Language: Russian
• Published: Tomsk Polytechnic University 2020-02-01
• Series: Известия Томского политехнического университета: Инжиниринг георесурсов
• Subjects: pit wall and pit bottom reserves; ore body; schemes of opening; completion of reserves; overburden coal ratio; mining position
• Online Access: http://izvestiya.tpu.ru/archive/article/view/2480/2160

The relevance of the research is caused by the need to develop new ore bodies appeared in the course of advanced operational exploration. Behind the design contours of the mines there are the reserves that need to be improved either by underground or combined methods. With the technology of refining the quarry reserves, the greatest difficulties arise, since their development causes a violation of the stability of the quarry sides. Therefore, the search, selection and justification of the parameters of the systems for developing pre-pit reserves in deposit exploration, providing effective and safe development of reserves, is a very urgent task. The main aim of the research is to consider possible options for pit mining of the pit wall and pit bottom reserves taking into account the occurrence of new ore bodies of apatite-nepheline deposit and compliance with the necessary conditions for a specified direction of mining development of mining boundary of property and to make a technical and economic assessment of the proposed options. Objects: large deposit of apatite-nepheline ores «Oleniy Ruchey». Methods: mining and geological analysis of the upper tier of deposits of apatite-nepheline ores «Oleniy Ruchey» and analysis of existing data on the physicomechanical properties of rocks composing the massif of the deposit in question, analysis of possible mining development schemes for mining deposits and reserves with an assessment of the possibility of internal dumping during quarry development. Results. On the example of development of the deposit of apatite-nepheline ores «Oleniy Ruchey», the authors considered possible options for mining and developing the pit wall and pit bottom reserves of the upper tier deposits in compliance with the conditions of development of mining boundary of property. The authors proposed the optimal development of mining operations according to the variant providing the minimum stripping ratio.