Semi hopper storage with slotted outlet is a type of modern automated large-capacity storage. The criterion for selecting the main parameters can be taken as a minimum cost of construction of the warehouse, since the change in the length L and cross-section F of the stack has a relatively small effect on the operating costs.

Long-term practice of deep ore dumps shows that in their operation there are significant difficulties, especially in the harsh climatic conditions of the Arctic Circle ...

One of the progressive directions in the development of mechanization and automation of mine transport is the complete conveyorization of transport from the loading face to the bunkers on the surface. However, it is difficult to carry out complete conveyorization, because for one link of the transport scheme - along vertical shafts - has not yet developed a sufficiently economic and reliable method of conveyor transport ...

One of the urgent issues of operation of belt conveyor lines of the mining industry is the improvement of existing and finding new ways of cleaning conveyor belts ...

Widespread use of conveyor transportation in some cases is limited by the shortcomings of traction and load-carrying bodies of existing types of conveyors. Belt conveyors with rubberized fabric (cotton and synthetic) belt have a relatively small length per drive and short belt life. The disadvantage of belt conveyors with rubber tether belt is the high cost of the belt and its repair (amortization of the cost of the belt is up to 50% of the total cost of transportation). Belt-and-channel conveyors have a complex belt design and, accordingly, its cost is high. Belt-chain, slat and scraper conveyors have a small length per drive, low strength and very high weight of the traction body ...

Currently, the main types of traction organ of conveyors and elevators are chains and rubberized belt. The use of rope traction is limited by the lack of a convenient design of attachment of the working body (scrapers, plates, buckets) to the rope. The existing types of attachment require adjustment of the pitch when pulling the rope and special devices for passing the couplings on the drive pulley. Fastening of these devices should be systematically controlled, as tightening is carried out by bolts.However, the rope pulling device has a number of advantages in comparison with the chain one: 6-8 times less weight, lower cost, greater reliability in operation and durability. At the same time, the design of pulleys, especially drive pulleys, is characterized by complexity and therefore relatively unreliable in operation. Sheaves for ropes with clamping couplings have a number of significant disadvantages and in the industry are used to a limited extent.

Comparative indicators of transportation cost are the main factors influencing the choice of transportation method. In this regard, it is of great interest to develop the most convenient for practical use methodology for determining these indicators.Determination of the transportation cost indicator for each of the compared options by the method of conventional tabular calculations is a time-consuming and cumbersome process, as it requires preliminary technical calculation of each option and on its basis - the compilation of various estimates and financial calculations.

Transportation of minerals along vertical mine shafts is carried out mainly by skip hoisting. This type of lifting, being an intermittent transportation unit, has a number of disadvantages. The main ones are as follows: 1) the necessity of construction of intermediate tanks (reloading hoppers) in the near-borehole and on the surface, designed to mitigate the unevenness of lifting and transportation on the surface;2) the complexity of full automation of the lifting process due to the need to continuously change the mode of operation of the engine; 3) high specific energy consumption and increased installed power of the engine, caused by the inclusion of starting rheostats and the presence of peak loads at each cycle of lifting.

In the practice of design and operation of mine electric locomotive traction is very important is the correct solution of the question of choosing the size of the train. In modern production practice, the solution of this question is essentially reduced to the choice of the coupling weight of the electric locomotive. Indeed, in spite of the fact that theoretically the optimum train size can vary within wide limits with an interval equal to one car, the coupling weight of the electric locomotive is taken not as required by the calculation for this train, but the nearest to the calculated one according to the standard. The final size of the train is usually taken from the condition of the maximum weight of the train for the selected electric locomotive size. Since there are only three standard values of the coupling weight of rolling electric locomotives, the same coupling weight of an electric locomotive is inevitably adopted for a very wide range of optimal train sizes.

Один из широко применяемых в настоящее время методов расчета ленточных конвейеров состоит в предварительном расчете, исходным положением которого является ориентировочно определяемая величина мощности на приводном валу конвейера, и в окончательном расчете — способом определения натяжений в характерных точках контура тягового органа. При этом методе точность окончательного расчета зависит от точности определения предварительным расчетом веса погонного метра ленты. Практика расчетов показывает, что в ряде случаев погрешность при предварительном определении веса ленты может достигать значительной величины, в результате чего окончательный расчет оказывается не­достаточно точным. Основные погрешности предварительного расчета заключаются в сле­дующем: 1) максимальное натяжение ленты определяется формулой, которая справедлива не для всех встречающихся в практике случаев; 2) вес движущихся частей конвейера принимается ориентировочно.

Вес поезда в расчетах рудничной электровозной тяги принимается" по наименьшему значению, определяемому из условий сцепного веса электровоза, нагревания тяговых двигателей и торможения поезда. Одно из перечисленных условий в каждом конкретном случае в зависимости от основных технических параметров электровоза и условий транспортирования является ограничивающим и определяет величину состава. В рассматриваемом случае из основных технических параметров электровоза имеют решающее значение параметры сцепного веса, длительной силы тяги и длительной скорости электровоза. Совершенно очевидно, что рациональное соотношение между величинами этих параметров представляет значительный интерес, так как оно дает возможность при прочих равных условиях допустить большую величину состава.

Внедрение автоматизации в основные и вспомогательные производственные процессы является в настоящее время важнейшим направлением дальнейшего развития механизации советской горной промышлен­ности. Перед работниками, занимающимися этим вопросом, стоят две основные задачи: 1) широкое внедрение в производство уже имеющихся в этой области достижений, проверенных практикой работы отдельных предприятий; 2) отыскание путей дальнейшего расширения области применения автоматизированных способов работы и усовершенствования применяемого для этого оборудования. Перевод на автоматическую работу различных пока еще не автома­тизированных узлов комплекса электромеханического оборудования шахт требует решения ряда проблем, связанных с созданием специальных видов оборудования, схем и аппаратуры автоматического управления, контроля и регулирования. Принципиально автоматизировать можно работу почти всех рудничных механических установок, но автоматизация одних достигается сравнительно просто, а других, даже хорошо зарекомендовавших себя при обычных неавтоматических способах работы, — лишь при применении весьма сложных схем и большого количества дополнительного оборудования и регулирующей аппаратуры.

The existing method of calculating the traction body of mine rope pullers is similar to the method of calculating the rope of mine hoisting installations, developed by A. P. Herman. The method consists in determining the weight of a linear meter of rope by the maximum static load on the rope, including also its own weight, and in the selection of rope according to factory data on the basis of the weight found. The currently used method of calculating the traction organ of belt conveyors consists in the preliminary determination of power on the shaft of the drive drum conveyor, for which is tentatively taken the weight of moving parts of the conveyor, then sequentially determined: the traction force, the maximum tension of the belt, the required number of pads and, finally, the weight of a linear meter of belt. After the approximate weight of the belt is determined, the final calculation is repeated. With the current calculation methodology, the weight of the moving parts of the conveyor must inevitably be taken tentatively, since the exact weight of the belt is not known at the beginning of the calculation.

In the practice of production and design works there is often a need to determine the maximum length of a scraper conveyor per drive for specific transportation conditions. However, to date, this issue in the technical literature is not sufficiently covered. This article sets the task of establishing design formulas for determining the length of the conveyor per drive depending on the main parameters of the transportation unit - the strength of the traction body and the installed engine power.