Mechanism Analysis of Hydraulic Cutting Outburst Prevention Measure Applied to Mining Area of Heilongjiang Province

Abstract

Grave protrusion coal seam tunnelling hydraulic cutting outburst prevention measure is a new technology in the world. The measure had been applied successfully to Jiaozuo Coal Group and run well. The mining areas of Heilongjiang are characterized by complex geological structures, more medium-thickness protrusion coal seam and abundant groundwater, on the basis of referring to technical parameters of the outburst prevention measures of Jiaozuo Coal Group, the outburst prevention mechanism of hydraulic cutting applied to medium-thickness protrusion coal seam was analyzed from the coal stress surrounding hole, internal forces of gas, stress concentrated zone and its moving speed, thickness of pressure released zone and intensity change of coal, and the feasibility of hydraulic cutting outburst prevention technique applied to Heilongjiang was verified. This provides theoretical basis for the technique applied to mining area of Heilongjiang Province.