Effectiveness of replacing a large cross-sectional two-track excavation with two smaller excavations (Tekeliye mine as an example).

Abstract

The nature of manifestations of mining pressure largely depends on the size of the cross-section of mine workings. As is known, in the same mining and geological conditions, maintenance of two-track workings is much more expensive than single-track workings. In this regard, in some basins of the Soviet Union in difficult mining and geological conditions prefer to pass two smaller cross-sectional workings instead of one large one. For example, in the Moscow sub-basin panel drifts should be double-tracked according to the conditions of mining technology, because almost the entire length consists of loading points. In the reverse order of mining the mine field, it is considered more favorable to sink panel drifts as single-track drifts with subsequent expansion to double-track drifts by the time of longwall face approach. The total costs are lower than when sinking two-track drifts at once. In the latter case, the cost of maintaining the workings increases sharply ...