Justification for the parameters of extraction panels under the conditions of increased water inflows using computer models of rock mass

Abstract

Abstract The purpose of the research is to increase the efficiency of underground mining of flat coal-bearing seams with powered longwalls in the areas characterized by complex hypsometry and high water inflows. The modern global trend to increase the size of extraction panel (the length of longwall and the length of column) during the development of flat coal-bearing seams is shown. The results of the development of a three-dimensional model of the array are presented, which allows building profiles of the earth surface and the developed seams in the areas with complex hypsometry. The applicability of the use of such models to determine the rational place for the formation of dismantling chamber is shown. The interrelation between the length of longwall and the length of extraction panel during the mining thick coal-bearing seams is shown. The assessment of the additional costs and damages caused by the division of the extraction panels into two parts is carried out to ensure an upward order of mining reserves under the conditions of increased water inflows. The field of rational application of the division of extraction panel into two parts for the conditions of the mine site named after V.D.Yalevsky is determined.