Designing the Parameters of the Block Method of Open-Pit Coal Mining With the Use of Auto Transport Technology

Recently, technological solutions aimed at reducing the negative consequences of open-pit mining have been increasingly introduced into design and production practices.Such solutions include a block method of working off the career field.The main goals and objectives of the block mining method are: reducing the level of alienation of land for external dumping and maximizing the use of the developed space for internal dumping.The enlarged disadvantages of introducing the block method into the design documentation of coal mines is the lack of a unified methodological approach in determining the main parameters of the initial and subsequent blocks, which are: length, width, depth and capacity of the internal dump.In this regard, a methodology is proposed for determining the parameters of blocks interconnected with the capacity of the internal dump and the production level.the volume of stripping and the range of transportation.In this case, the parameters of the initial block are set by the width and depth of the formation formation, as well as the cost-effective transportation range.The parameters of the second and subsequent blocks are similar in width and depth to the initial one and depend on the configuration of the formation formation, the length of the block is set by the possible capacity of the internal dump formed in the developed space of the initial block, limited by the cost-effective transportation range.By examining these parameters, patterns have been identified and methodological approaches have been developed to calculate the parameters of the blocks, ensuring the maximum capacity of the internal dump.At the same time, the revealed patterns allowed us to propose empirical calculation formulas for the main parameters of the blocks.The proposed method for calculating block parameters was evaluated using the example of a coal mine, the result of which allowed 17.5% more overburden to be placed in the worked-out space than was proposed in the project.