摘要
针对南阳煤矿3207工作面沿空留巷巷旁支护墙破裂、钻入顶板的现象,基于沿空留巷顶板超前预裂卸压机理,对顶板超前预裂卸压参数进行了优化。在3206工作面沿空留巷现场应用后,巷道围岩稳定性较好,有效减弱留巷受采空区顶板旋转产生的影响。
In view of the phenomenon that the side support wall of goaf side entry retaining in 3207 working face of Nanyang Coal Mine was broken and drilled into the roof,based on the pre-splitting and pressure relief mechanism of the roof of gob-side retaining roadway,the pressure relief parameters of the roof pre-splitting are optimized.After the field application of gob side entry retaining in the 3206 working face,the stability of roadway surrounding rock is good,and the influence of retained roadway caused by roof rotation of goaf area is effectively reduced.
作者
姬志朋
Ji Zhipeng(Shanxi Gaoping Kexing Nanyang Coal Industry Co.,Ltd.,Shanxi Jincheng 048400)
出处
《山东煤炭科技》
2022年第11期19-21,24,共4页
Shandong Coal Science and Technology
关键词
沿空留巷
预裂
爆破
切顶
gob-side entry retaining
pre-splitting
blast
roof cutting
