8809工作面过空巷覆岩失稳规律及围岩控制技术研究

Study on the Instability Law of Overburden Rock and the Control Technology of Surrounding Rock When 8809 Working Face Passing Through Empty Lane

为保障8809工作面推进过空巷区域的安全生产,通过对过空巷区域时覆岩变形规律的分析,得出工作面与未支护的空巷间煤柱宽度为14m时,空巷围岩出现失稳。基于分析结果,确定J09-01和J09-02空巷采取锚网索+工字钢梁的支护技术,J09-03和J09-04空巷采用预充填技术,工作面顺利通过补强支护和充填空巷区域。

In order to ensure the safety production of 8809 working face in the area passing through the empty lane,through the analysis of overburden deformation law when passing through the empty lane,it is concluded that when the width of coal pillar between the working face and the unsupported working face is 14m,the surrounding rock of the working face appears instability.Based on the analysis results,it is determined that J09-01 and J09-02 air tunnels adopt the support technology of anchor mesh cable+I-steel beam,J09-03 and J09-04 air tunnels adopt the pre filling technology,and the working face passes through the empty lanes which is reinforced,supported and filled.