顶板深孔预裂爆破卸压支护技术研究

Research on Pressure Relief Support Technology of Roof Deep Hole Presplitting Blasting

针对红阳三矿采区主体巷道变形及资源浪费等问题,在704工作面提出了顶板深孔预裂爆破卸压支护技术。通过数值模拟,分析了采场前方应力场变化特征及主体巷道的卸压护巷效果,结合数值模拟结论,对预裂爆破卸压关键参数进行了现场实践,经后期矿压监测验证,整体支护效果较好,能够在同类地质条件下推广应用。

In view of the deformation and resource waste of the main roadway in Hongyang No.3 Coal Mine,the pressure relief support technology of roof deep hole presplitting blasting was proposed for 704 working face.Through numerical simulation,this paper analyzesd the change characteristics of stress field in front of the stope and the effect of pressure relief and roadway protec-tion of the main roadway.Combined with the conclusion of numerical simulation,the key parameters of presplitting blasting and pressure relief were put into practice.Through the later mine pressure monitoring verification,the overall supporting effect of the technology was good,and it could be popularized and applied in similar geological conditions.