Abstract:
In view of the continuous growth of coal demand and the increasing depletion of shallow coal resources, deep coal resource mining activities lead to frequent occurrence of coal and gas outburst accidents.In order to effectively improve the prevention and control efficacy of the impact ground pressure disaster, based on the damage evolution mechanism of the gas-containing coal body, it is elaborated that its stress and damage process manifests itself as a compression-dense and then destructive process.The results show that the decrease of the strength of the coal body should be reduced in the fracture area, the force generated by the compressive deformation on the coal body in the front area should be weakened in the stress concentration area, and the target parameter system in the form of the constructed segmented function can evaluate the effectiveness of the preventive measures, such as the over-drilling, according to the different scenarios.