Field preparation of long excavatory pillars in the conditions of the Western Donbass mines

Abstract

Purpose. Reduce the cost of preparing pillars up to 3000 m in length. Methods. The analytical method of research was used to analyze the mining-geological conditions of the field development, the production situation for the development of mining operations and the conditions of application of the field method of preparation. The method of options is to select and justify a rational inventory preparation system in terms of value and justify measures for timely preparation and completion of inventories. Economic and mathematical method - to calculate the technical and economic indicators of field workings and indicators for the mine as a whole. Findings. The real economic effect in the amount of UAH 945 thousand was established due to the research and calculation of the parameters of preparation of coal reserves in the block # 3 of the mine "West-Donbass". According to the results of the research it was found that the workings should be made upstream of the reservoir and 2 m below the level of the lava with the arrangement of ventilating hatches and pipes with a diameter of 1 m. Originality. Field preparatory work, which is laid in the sole of the coal seam, intensifies mining operations at mining sites by reducing the time of preparation and working off of reserves, improving the ventilation of workings and reducing the cost of production. Practical implications. Development of technology for the preparation of reserves, which allows to increase the load on the bench and reduce the cost of preparation and working out of coal reserves in large production pillars.