陕西煤炭

鉴于煤炭需求量的持续增长及浅部煤炭资源的日益枯竭，深部煤炭资源开采活动导致煤与瓦斯突出事故频发，为有效提升冲击地压灾害的防控效能，基于含瓦斯煤体的损伤演变机制，阐述了其应力和损伤过程中表现为先压密后破坏的过程。结果表明，断裂区域应减缓区域内煤体强度的下降，应力集中区应减弱挤压变形对前方区域煤体产生的作用力，构建分段函数形式的目标参数体系，能够根据不同情境评估超前钻探等预防措施的效果。研究成果对于指导局部防突措施的科学设计与合理布局具有重要价值，保障了煤矿开采的安全进行。

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.