Geomechanical justification based on the results of numerical modeling of combined technology parameters of working areas development with the use of robotized means of underground mining

Based on the results of numerical modeling the assessment of the options for selective and sequential development of the working areas and coal mine blocks by fully-mechanized longwalls with a complete collapse of the roof and short faces with the roof controlled by rib pillars. As the criteria for assessing the effectiveness of geotechnological options, the coefficients of vertical stress concentrations in the selvedge of the coal seam in the vicinity of extraction galleries and the height of the unloading zone of the roof rocks over the gob are adopted. Factors that limit the use of longwall faces are the presence of disjunctive disturbances within the mine field, which leads to coal losses and irrational use of subsoil. It was established that successive development of excavation sites with long and short faces results in a more even distribution of the vertical stress concentration coefficients, reduces the probability of zones with increased rock pressure and gas dynamic phenomena, and also provides an opportunity to increase the coal extraction factor.