天山矿区综放工作面矿压控制技术  

Control Technology of Mine Pressure at Full- mechanized Caving Face in Tianshan Mining Area

作　　者：王永仁[1,2] 赵善坤[1,2] 李晓璐[1,2] 

机构地区：[1]煤炭科学研究总院矿山安全技术研究分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013

出　　处：《煤矿安全》2014年第1期215-217,共3页Safety in Coal Mines

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB226806);国家自然科学基金资助项目(51174272)

摘　　要：分析了在不同炮孔角度下,超前深孔顶板预裂爆破单孔爆破方式和组合爆破方式的爆破效果。采用FLAC3D数值分析软件对单孔爆破的炮孔角度及多孔爆破的组合炮孔角度进行了模拟。同时,在现场进行了不同参数下的爆破试验,实测了爆破前后煤体应力和钻屑量的变化。超前深孔顶板预裂爆破可有效降低应力水平,高应力区向煤岩深部转移,炮孔附近形成一定的卸载区域,得到了超前深孔顶板预裂爆破的最佳炮孔角度。It analyzed the blasting effects of the single blasting methods and combined blasting methods of deep ahead roof pre - blasting at different blasthole angles. FLAC3~ numerical analysis software was used to simulate the different blasthole angles of single blasting and combined blasting. Meanwhile, it carried out blasting tests under different parameters on site, measured the change of coal stress and drilling cuttings. Deep ahead roof pre - blasting could effectively reduce the stress level, high stress transferred to the deep coal rock, thus the unloaded region formed near the blasthole, and obtained the best blasthole angle of deep ahead roof pre - blasting.

关 键 词：预裂爆破 炮孔角度 数值模拟 煤体应力 钻屑量 

分 类 号：TD324[矿业工程—矿井建设]