Results of the experimental research of the heat-transfer jet pressure to the rock surface during thermal reaming of the borehole

¹ Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine, Department of Vibropneumatic Transport Systems and Complexes, 2a Simferopolska Str., 49005 Dnipro
² Dnipropetrovsk National University of Railway Transport named after Academician V. Lazarian, Department of Thermal Engineering, 2 Lazariana Str., 49010 Dnipro, Ukraine
³ Dnipropetrovsk National University of Railway Transport named after Academician V. Lazarian, Department of Accounting, Auditing and Intellectual Property, 2 Lazariana Str., 49010 Dnipro, Ukraine

^* Corresponding author: OIVoloshyn1951@nas.gov.ua

Abstract

The performed analysis of scientific sources confirms the existence of a small number of publications devoted to the experimental research of the gasdynamics and plasmodynamics of jets used as a heat-transfer medium in the thermal methods of mine rocks destruction. There are almost no experimental and theoretical publications related to the multiple-jet plasmotrons research. The expediency of own experimental researches performing has been substantiated concerning the lateral inflow of heat-transfer medium high-speed jets on the borehole surface. An experimental research has been made of the interaction between the heat-transfer medium high-speed jets and the surface of the borehole imitated by the through duct. The further prospects of this work are the following: to determine the gas velocity along the lateral surface of the through duct and the value of the heating capacity coefficient from the heat-transfer medium to the lateral surface of the through duct, which imitates the rock surface in the borehole. These parameters are required for creating a mathematical model of the brittle destruction of rocks.