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The paper presents research results from combusting high-energy solid rocket fuels (propellants) in laboratory rocket motor (LRM). The process of combusting high-energy fuel is characterized by fast chemical reaction, which causes creating a gaseous product with high pressure, which is able to produce a secondary system of fractures in the coal. The value of pressure from combusting propellants can be controlled in a laboratory rocket motor by an appropriate selection of mass of the fuel and the diameter of the no...

The coal samples were fractured by using high-energy solid fuel (propellants) in the lab rocket motor (LRM) adapted to investigate the impact of propellant gases pressure on rocks. The combustion of the propellant generates large quantities of gases at high pressure, which are able to produce a secondary system of fractures in the coal - potential pathways for methane migration. Values of pressure and time generated during combustion of propellants in the standard system of a laboratory rocket motor are controlled...