РЕАЛІЗАЦІЯ ПРОЄКТУ ПІДГОТОВКИ ГОРИЗОНТУ 607 М ШАХТИ ІМЕНІ КОЛАЧЕВСЬКОГО ПРАТ «ЦЕНТРАЛЬНИЙ ГЗК» В УСКЛАДНЕНИХ УМОВАХ

Abstract

This article examines the systematic and phased implementation of the project to develop the 607-meter level of the Kolachevsky Mine, operated by PJSC “Central Mining and Processing Plant,” under challenging mining and geological conditions and during martial law. The project’s goal is to maintain an annual production level of 1.6 million tons of valuable iron ore raw materials for the near future, at least until 2046. Currently, this is the only mine in the Kryvyi Rih Basin where low-grade magnetite quartzites are mined underground and transported for processing to the Central Mining and Processing Plant. Crosscuts have been driven from the mineshaft toward the deposit along the working levels, and rock drifts have been excavated near the ore body, from which opening drifts have been driven. Currently, the “Pivdenna-Magnetitova” deposit in the mining allotment of the Kolachevsky Mine is being developed using a room-and-pillar mining system with the caving of ore and host rock, employing vibro-discharge of ore from the mining blocks. Given the complex tectonic, hydrogeological, and geomechanical conditions, a project for the effective preparation of the mining level was developed and implemented; it has been repeatedly adjusted in accordance with the current situation and is now in its final stage. The project includes a justification and selection of the method of work execution, namely contract, in-house, or a combination thereof, as well as optimal geotechnical technologies and equipment sets for the construction of a complex of underground mine workings, in particular, chambers, drifts, access tunnels, etc. A comparison of options for purchasing new or repairing existing mining equipment has been performed. The study is aimed at developing and implementing effective approaches to preparing a new mining level under challenging conditions. Technical solutions, implementation methods, and practical results are presented, confirming the feasibility of the proposed approaches. The materials presented can be used in the design of deep ore mine levels under similar conditions. The scientific novelty of the work lies in a comprehensive approach to the design of geotechnical technologies, consideration of tectonic and hydrogeological factors, as well as in the optimization of the method and sequence of tunneling operations for the purpose of efficient and safe exploitation of the deposit.