ABSTRACT
The hydraulic injection of coal seams under rockburst hazard is one of the basic methods for modifying their physical and mechanical properties in order to lower the energy storing ability of a seam. Rational application of the method requires an assessment of the process relative both to an extent of the changed structure zone and to the intensity magnitude of changes. Geomechanical complexity of the hydraulic pressurized injection process manifesting itself in the form of increased fractured porosity effect and increased coal seam moisture content effect requires for its assessment elaboration of a specific measuring procedure. Fundamental elements of the method based on the underground seismic measurement technique associated with new interpretation solutions and assessment criteria are characterized. An example of the method application in mining practice is shown.
