浅埋深厚煤层回风巷煤帮变形破坏分析及支护建议

Analysis on the mechanism of coal wall deformation and failure of return in shallow buried thick seam and countermeasures

补连塔煤矿22煤3盘区埋深210-270 m,煤层较厚,22305工作面为7 m大采高工作面,该工作面采过后,22306回风巷煤帮围岩变形破坏严重,发生片帮、锚杆、锚索破断等现象。针对该地质条件,利用FLAC3D软件进行了数值模拟计算,分析了受采动影响后煤帮围岩的变形破坏规律,提出了煤帮支护建议。

In Bulianta Mine,the buried depth of №2-2coal seam is 210-270 m. After the mining of №22305 face with 7m mining height,the severe deformation and failure of surrounding rock was happened in the return of №22306 face. According to the geological conditions,by using the FLAC3 Dnumerical simulation software,the deformation and failure rule of surrounding rock with mining influence was analyzed,and the supporting plan of coal wall was proposed.