Brake incline

the scheme for the conducting of the brake incline with the passwaythe scheme for the conducting of the brake incline with the narrow stope

BRAKE INCLINE (the Russian word has been borrowed from the German word "Bremsberg", from the "Bremse" (brake) and "Berg" (mountain); according to the method for the transportation of the load within the mine trolleys down along the dip of the layer under the impact of its own weight with the help of the braking device * EN: brake incline, inclined drift slope, gravity plane; DE: Bremsberg, Aufhauen; FR: plan incline; ES: piano inclinado; RU: бремсберг) is the inclined mine working, which has no exit to the surface, which has been headed, as a rule, along the dip of the layer or of the deposition, and which is purposed for the lowering of the useful minerals onto the haulage horizon; it is sometimes used for the supplying of the fresh air from the lower horizons into the upper horizons. Brake incline is usually equipped with the conveyor installation (less often with the cable haulage for the mine trolleys or skips). Depending on the purpose and situation, they distinguish the main (major), panel, intermediate (place), and auxiliary brake inclines. The main brake incline serves the entire brake incline part of the mine field (the level method for preparation), the panel brake incline serves the panel, the intermediate brake incline serves the excavation field, and serves mainly for the transportation of the useful minerals from the sub-levels onto the haulage drift of the level. They conduct the auxiliary brake incline parallel to the main brake incline, and use it mainly for the lowering of the rock and other loads onto the haulage horizon of the level or underground mine, and also for the lifting of the equipment and materials into the opposite direction, and for the supply of the fresh air. It is equipped, as a rule, with the terminal cable haulage.

The main and panel brake inclines pass within the layer of coal or within the rock, and the intermediate brake inclines also pass within the goaf space (in case of the continuous system for development). For the passage of the human persons, they conduct the passway parallel to the brake incline. The airing for the stopes of the brake incline and for the passways is performed at the expense of the common jet flow within the underground mine, it is acceptable the usage of the ventilation fans for the local airing. They usually head the brake incline from the bottom upwards, but within the layers of the danger category III according to the gas, and within the extra-category layers, they mainly head the brake incline from the top downwards (for the facilitation of the airing). The conducting of the brake incline may be performed by the narrow stope with the ripping of the lateral rocks or without the ripping (in case of the thickness of the layer of coal of 2.3-2.4 metres), and also by the wide stope. The heading of the brake incline by the narrow stope with the ripping of the rock is performed according to the two schemes: in one stage, with the performance of the works for both coal and rock within each cycle; in two stages, with the preliminary excavation of coal, and with the subsequent excavation of rock (Figure # 1). The scheme for the conducting of the brake incline (with the passway) without the ripping of the lateral rocks is presented on the Figure # 2. In case of the heading of the brake incline by the wide stope (is used rarely), the brake incline and the passway may have the common stope for the coal or the independent stopes for the coal.

In the latter case, they preserve the virgin pillar of coal between the brake incline and the passway. The cross section for the brake incline is chosen in accordance with the standard typical cross sections for the mine workings, depending on the transport means, which are used, and on the conditions for ventilation and for repairless maintenance. The average tempos for the conducting of the brake incline amount to 85 metres per month, and the maximal tempos amount to 350 metres per month.