Dychkovskyi R. Scientific Principles of Technologies Combination for Coal Mining in Weakly Metamorphosed Rockmass

Dissertation is devoted to the solution of the actual scientific problem of the technologies combination of coal mining from thin and rather thin seams in weakly metamorphosed rockmass. On the basis of theoretical, laboratory and industrially experimental researches, the dependences of the stresses and deformations were established around artificial cavities during the underground gasification, which depends on the thickness of the melting shell and complex mechanized wallfaces taking into account the coefficient of lithologic structure of rock massif. As a result of the conducted researches, the numeral values of length wallface change and physical indexes of rockmass, which depend on the factor of lithologic structure at application of highly productive technologies of coal mining from thin and rather thin seams, were determined. Also dependences of change of thickness of the artificial shell were defined, providing the proper step of roof landing for the effective passing of blowing mixture in gazogene. The rockmass stresses were executed for the complex mechanized mining and the application of the coal gasification technology according the location less and high pressure zones. Recommendations are offered in relation to the parameters of the mechanized fastening. They allow mining the coal from thin and rather thin seams more effectively. The flowsheets of underground gazogenes for the synthesis gas variation with the purpose of maximal receipt of the methane were developed. The economic effect of 1,2 - 1,3 million UAN from one mining set confirms the expedience of the offered technical and technological measures.