赵家庄矿综放面聚能卸压研究及应用

Research and application of cumulative pressure relief in fully mechanized caving face of zhaojiazhuang coal mine

为进一步减少赵家庄矿井下N205面基本顶初次来压步距,对N205面卸压方案进行优化,根据聚能爆破机理分析,提出聚能卸压方案;在爆破参数基本一致前提下,增设聚能管,来提高N205面顶板的卸压效果。再运用ANSYS/LS-DYNA模拟,从应力云图、LS-PREPOST后处理及压力历程曲线分析方案的裂隙发育情况,得出聚能方案能提高爆破的预裂效果。最终N205面实施了聚能卸压爆破,来压步距减少了3.2 m,证实了该方案具有较好的工程应用价值。

In order to further reduce the initial pressure step distance of N205 surface basic roof in zhaojiazhuang coal mine,the pressure relief scheme of N205 surface was optimized.According to the analysis of shaped charge blasting mechanism,the pressure relief scheme of shaped charge was put forward.Under the premise of basically consistent blasting parameters,the shaped charge pipe was added to improve the pressure relief effect of N205 surface roof.Then using ANSYS/LS-DYNA simulation,from the stress nephography,LS-Prepost post-processing and pressure history curve analysis of the fracture development effect of the scheme,it is concluded that the cumulative charge scheme can improve the blasting pre-splitting effect.Finally,the shaped charge pressure relief blasting was implemented on the surface of N205,and the pressure step distance was reduced by 3.2 m,which has good engineering application value.